For this proyect, we created an app for mobile devices, specifically for android devices. This was developed with the SL4A as we mentioned before.
This tutorial will simply explain the code of the android client. This software as the entire proyect was released within the GPLv3 License, therefore the code starts with the header for the license agreement.

#Copyright (C) 2013 Fabian Melendez B.  fabmelb@gmail.com
#https://wiki.arcoslab.eie.ucr.ac.cr/doku.php?id=ie0117_proyectos_2013:way_to_shop
#https://github.com/gmocornejos/Way_To_Shop/wiki
 
#This file is part of Way To Shop.
 
#Way To Shop is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.
 
#Way To Shop is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
 
#You should have received a copy of the GNU General Public License
#along with Way To Shop. If not, see <http://www.gnu.org/licenses/>.

After this, we needed a couple of imports, in order to create sockets, control the app's timing in some process and of course use the SL4A build-in's functions. Then we create the droid instance and some global variables.

import socket, android, time
 
droid = android.Android()
 
# ------------------------------------- Global Variables -------------------------------------- #
username = ""
password = ""
latitude = 00
longitude = 00

We decided to create a function that allows to connect with our server, for this purpose, we try to connect until it's done, because the app cant function without this connection. We try a few times (15) and if the connection it's not established we communicate it to the user.

# -----------------------------Stablishing the conection with the server------------------------------------- #
 
#----- A function to create the socket ------ #
 
def connectToServer():
 
	#A boolean that indicates if the connection was successful
	conection = False
	#An int that indicates the amount of connection attempts
	count = 0
	while (conection==False):
		conection = True
		try:
			#We add an attempt
			count += 1
 
			#We define the client instance
			client = socket.socket(socket.AF_INET, socket.SOCK_STREAM
 
			#The address of the server (IP , PORT)
			server_address = ('192.168.1.111', 10100)
 
			#We try to connect to the server
			client.connect(server_address)
 
			droid.makeToast('Socket created')
 
			#We return the client instance
			return client
 
		#In case the connection failed
		except:
 
			conection = False
 
			#In case we tried to connect several times 
			if(count == 15):
				droid.makeToast("Connection Error")
				#We restart the counter
				count = 1

For this screen, the layout was pretty simple, we needed two text fields to receive the inputs of the username and the password (this one is special, is a password-type text-field); and also there's two buttons, one for logging in, and other for sign up.
The XML code for this layout looks like this:

<RelativeLayout  xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/background"
	android:orientation="vertical"
	android:screenOrientation="portrait"
	android:configChanges="orientation"
	android:layout_width="match_parent"
	android:layout_height="match_parent" android:background="#ff000000">
 
<EditText
	android:id="@+id/username"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignParentTop="true"
	android:layout_centerHorizontal="true"
	android:layout_marginTop="132dp"
	android:ems="10"
	android:inputType="textPersonName" >
 
	<requestFocus />
</EditText>
 
<Button
	android:id="@+id/login"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignLeft="@+id/username"
	android:layout_alignParentBottom="true"
	android:layout_marginBottom="27dp"
	android:text="LogIn" />
 
<Button
	android:id="@+id/signup"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignBaseline="@+id/login"
	android:layout_alignBottom="@+id/login"
	android:layout_alignRight="@+id/password"
	android:layout_marginRight="17dp"
	android:text="Sign Up" />
 
<EditText
	android:id="@+id/password"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_below="@+id/pass"
	android:layout_centerHorizontal="true"
	android:layout_marginTop="26dp"
	android:ems="10"
	android:inputType="textPassword" />
 
<TextView
	android:id="@+id/pass"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignLeft="@+id/user"
	android:layout_centerVertical="true"
	android:text="Password"
	android:textAppearance="?android:attr/textAppearanceLarge" />
 
<TextView
	android:id="@+id/user"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignBottom="@+id/username"
	android:layout_centerHorizontal="true"
	android:layout_marginBottom="73dp"
	android:text="Username"
	android:textAppearance="?android:attr/textAppearanceLarge" />

In this layout there are somethings that important to emphasize in, for example the id of the text fields and the buttons. This we'll be used later in the event loop for the screen.
Also, its important to remember that this code will be matched to a variable, in this case its called “loginlayout” with it, and executing the print droid.fullShow(loginlayout) command, we show this layout, the result looks like this:

When the username doesn't match the password or the username isn't in our database, the login petition is denied and the user is informed about it, like this:

After showing the screen, the app should respond to the interaction with the user, that why an event loop function is needed, for this screen its simply called login basically it responds to two types of interaction, the login button or the sign in button .
For the LogIn button it extracts the input of the user in the username and password fields, comunicates to the server and if the username and password match with some in the database, we send the user to the menu screen, for this we close this lay out, close the current layout, and show the layout for the menu and trigger the menu function. If the username and password don't match some in the database, we comunicate it to the user.
If the user clicks on sign up, we send them to the sign up screen.

def login(client):
	while (True):
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the login button:
			if (id=="login"):
 
				username = droid.fullQueryDetail("username").result["text"]
				password = droid.fullQueryDetail("password").result["text"]
 
				#Comunication with the server
 
				message = "login<>"+username+"<>"+password
 
				#For checking
				client.sendall(message)
 
				#Waits for an answer
				answer = client.recv(100)
 
				#The response depends on the server's answer
				if (answer == "login<>success"):
 
					droid.makeToast("Logged In")
 
					droid.fullDismiss()
 
					print droid.fullShow(menulayout)
 
					#We execute the login screen decider, now on, the app controls itself with the previous methods 
					menu(client)
 
				else:
					droid.maleToast("Invalid Username or Password, Try Again, or SignUp") 
 
			#If it was the sign up button		
			elif (id=="signup"):
 
				#We close the actual screen
				droid.fullDismiss()
 
				#We show the sign screen
				print droid.fullShow(signlayout)
 
				#Trigger the decider for this screen
				sign(client)

For the layout for the SignScreen, its needed to collect a few information from the user, like username, password, email, and his real name; for this purpose were used some textfields. And there's a couple of buttons, one for the sign petition and other one going back.

<RelativeLayout 
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/background"
	android:orientation="vertical"
	android:screenOrientation="portrait"
	android:configChanges="orientation"
	android:layout_width="match_parent"
	android:layout_height="match_parent" android:background="#ff00000">
 
	<Button
		android:id="@+id/SignIn"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignBaseline="@+id/back"
		android:layout_alignBottom="@+id/back"
		android:layout_alignRight="true"
		android:text="SignIn" />
 
	<TextView
		android:id="@+id/textView2"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/textView1"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="18dp"
		android:text="Username:"
		android:textAppearance="?android:attr/textAppearanceMedium" />
 
	<EditText
		android:id="@+id/user"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/textView2"
		android:layout_centerHorizontal="true"
		android:ems="10" />
 
	<TextView
		android:id="@+id/textView3"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/user"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="27dp"
		android:text="Password"
		android:textAppearance="?android:attr/textAppearanceMedium" />
 
	<EditText
		android:id="@+id/passw"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/textView3"
		android:layout_centerHorizontal="true"
		android:ems="10" />
 
	<TextView
		android:id="@+id/textView4"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/passw"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="17dp"
		android:text="Name"
		android:textAppearance="?android:attr/textAppearanceMedium" />
 
	<Button
		android:id="@+id/back"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignParentBottom="true"
		android:layout_alignParentLeft="true"
		android:text="Back" />
 
	<TextView
		android:id="@+id/textView1"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignParentTop="true"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="18dp"
		android:text="Sign Up Information"
		android:textAppearance="?android:attr/textAppearanceLarge" />
 
	<EditText
		android:id="@+id/name"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignLeft="@+id/passw"
		android:layout_below="@+id/textView4"
		android:ems="10" />
 
	<TextView
		android:id="@+id/textView5"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/name"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="17dp"
		android:text="Email"
		android:textAppearance="?android:attr/textAppearanceMedium" />
 
	<EditText
		android:id="@+id/email"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignLeft="@+id/name"
		android:layout_below="@+id/textView5"
		android:ems="10" >
 
		<requestFocus />
	</EditText>
 
</RelativeLayout>

The result looks like this:

For the sign screen, when the user clicks the “SignIn” button, the information from in input is extracted with “droid.fullQueryDetail()” function, with this we can extract among other things, the text on a textfield. After this there's a communication with the server in order to know if the sign up petition proceeds, if so, the user is sent to the menu screen. Also if the user presses the “back” button, he's sent to the login screen again.

def sign(client):
	while True:
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the signup button:
			if id=="signin":
 
				#We extract the information from the textboxes
 
				username = droid.fullQueryDetail("user").result["text"]
 
				password = droid.fullQueryDetail("passw").result["text"]
 
				name = droid.fullQueryDetail("name").result["text"]
 
				email = droid.fullQueryDetail("email").result["text"]
 
				#We comuncate with the server
				message = "signup<>"+username+"<>"+password+"<>"+name+"<>"+email
				client.sendall(message)
 
				answer = client.recv(100)
 
				if answer == "signup<>success":
 
					droid.makeToast("Welcome! You are now sign up to Way To Shop!")
 
					#We close the current layout
					droid.fullDismiss()
 
					#We send the user to the menu screen
					droid.fullShow(menulayout)
 
					#The decider
					menu(client)
 
				else:
					droid.makeToast("Error check your username or password information")
 
					droid.fullDismiss()
 
					droid.fullShow(signlayout)
 
					sign(client)
 
 
			if id=="back":
				droid.fullDismiss()
 
				droid.fullShow(loginlayout)
 
				login(client)

The layout for the menu screen its the simplest of all the layouts. It consists in two buttons, one for the scan function and one for the way to shop function. The XML code for the layout looks like this:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/background"
 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ff00000"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"  >
 
    <Button
        android:id="@+id/waytoshop"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/scan"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="126dp"
        android:text="Way To Shop!" />
 
    <Button
        android:id="@+id/scan"
        android:layout_marginTop="117dp"       
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/waytoshop"
        android:layout_alignParentTop="true"
        android:text="Scan Barcode" />
 
</RelativeLayout>

The result running on a phone looks like this:

For this loop, is only needed to respond to two buttons. Because a matter of time, the only one functioning right now is the “Scan Barcode” one. For this the first thing done is scanning the barcode, with the “droid.scanBarcode()” command. After this, the barcode is extracted from the result, and we begin to determine the GPS location (meanwhile there's a loading alert). After this there's a communication with the server, and there's two possibilities, in case the item is in our database, the user is sent to the Item-Found screen. Otherwise, he's asked if he would like to add the item, and if so, there's several information to fill, like the store he's in, for this is used a list-type of alert, for the user to pick one, or to create a new one. The code for this event loop looks like this:

def menu (client):
	while True:
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the signup button:
			if id=="scan":
 
				#We scan the barcode
				code = droid.scanBarcode()
				#Extract the code
				bar = code[1]['extras']['SCAN_RESULT']
 
				#We start a loading alert
				droid.dialogCreateSpinnerProgress("Loading", "Please Wait")
				droid.dialogShow()
 
 
				#We start locating the client
				droid.startLocating()
				time.sleep(10)
				location = droid.readLocation().result
 
				#In case that the location failed, we get the last known location
				if (location == {}):
					location = droid.getLastKnownLocation().result
 
				#When we already have one known location
				if (location != {}):
					try:
						result = location['gps']
					except:
						result = location['network']
					#We extract the latitude and longitude from the lecture
					latitude = result['latitude']
					longitude = result['longitude']
					#address = droid.geocode(latitude, longitude).result
 
				#We stop locating
				droid.stopLocating()
 
				#We close the loading alert
				droid.dialogDismiss()
 
				#Now we comunicate with the server
 
				#seekitem<>barcode<>latitude%/longitude
				client.sendall("seekitem<>"+str(bar)+"<>"+str(latitude)+"%/"+str(longitude))
 
				#We wait for an answer
				answer = client.recv(100)
 
				if (answer == "seekitem<>notfound"):
 
					#We ask if the user wants to add the item (By alert Box)
 
					droid.dialogCreateAlert("Item not found", "Would you like to add it?")
					droid.dialogSetPositiveButtonText("Yes")
					droid.dialogSetNegativeButtonText("No")
					droid.dialogShow()
 
					#Wait for a response
					response=droid.dialogGetResponse().result
					#Close the dialog
					droid.dialogDismiss()
 
 
					if response.has_key("which"):
					  result=response["which"]
 
					  #If the user answered yes we send him to the itemnotfound screen
					  if result=="positive":
						#In case the user wants to add the item, we send him to the item not found screen
						droid.fullDismiss()
 
						droid.fullShow(itemnotfoundlayout)
 
						itemNOTfound(client, " ", " ", " ", " " , str(latitude), str(longitude) , True, str(bar))
 
					  elif result=="negative":
						#In this case we send the user back to the menu				
						droid.fullDismiss()
 
						droid.fullShow(menulayout)
 
						#We execute the menu decider
						menu(client)
				#In case the item was found
				else:
					responseArray = answer.split("<>")
					try:
						#We extract the information from the message
						name = responseArray[1]
						brand = responseArray[2]
						quantity = responseArray[3]
						description = responseArray[4]
						image = responseArray[5]
						lowestprice = responseArray[6]
						lowestpricestore = responseArray[7]
						closestlowerprice = responseArray[8]
						closestlowerpricestore = responseArray[9]
 
						#And we show it in the item found screen
						droid.fullDismiss()
 
						droid.fullShow(itemfoundlayout)
 
						itemfound(name, brand, quantity, lowestprice, lowestpricestore, closestlowerprice, closestlowerpricestore, description, client, str(bar), str(latitude), str(longitude))
 
					except:
						#In case it fails
						droid.makeToast("Error")
						#Back to the menu
						droid.fullDismiss()
 
						droid.fullShow(menulayout)
 
						#We execute the menu decider
						menu(client)
 
			if id == "waytoshop":
				#Not reay yet
				exit() 	

There are a few interesting things done with this code, for example, when the command “droid.scanBarcode()” the actual thing happening is that the Zxing Barcode Scanner app is triggered, the result looks like this:

Also, there's a loading screen, that consists of a spinner, the result looks like this:

Another resource used in this function, was the alert, in case the item wasn't found, the app asks if the user wants to add it, this is donde with an alert dialog:

In case the item wasn't found in our database, or if the user wants to edit an item, he's sent to the item found screen. In it there are multiple text fields, for the item's name, brand, quantity, the description, the price and the location. There are three buttons, one for going back (to the menu), another for submitting the item, and one for adding it to one list (Not functioning now). The xml code for the layout looks like this:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/background"
	android:orientation="vertical"
	android:screenOrientation="portrait"
	android:configChanges="orientation"
	android:background="#ff00000" >
 
    <Button
        android:id="@+id/Add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/back"
        android:layout_alignBottom="@+id/back"
        android:layout_alignParentRight="true"
        android:text="Add" />
 
    <Button
        android:id="@+id/back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="23dp"
        android:text="Back" />
 
    <Button
        android:id="@+id/submit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/Add"
        android:layout_alignBottom="@+id/Add"
        android:layout_centerHorizontal="true"
        android:text="Submit" />
 
    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_below="@+id/itemname"
        android:text="Brand:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/itembrand"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView3"
        android:layout_centerHorizontal="true"
        android:ems="10" />
 
    <EditText
        android:id="@+id/itemname"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/itembrand"
        android:layout_alignRight="@+id/itembrand"
        android:layout_below="@+id/textView2"
        android:ems="10" >
 
        <requestFocus />
    </EditText>
 
    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView3"
        android:layout_below="@+id/itembrand"
        android:text="Quantity:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/quantity"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/itembrand"
        android:layout_below="@+id/textView4"
        android:ems="10" />
 
    <TextView
        android:id="@+id/textView5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView4"
        android:layout_below="@+id/quantity"
        android:text="Price:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/price"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/quantity"
        android:layout_below="@+id/textView5"
        android:ems="10" />
 
    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView5"
        android:layout_below="@+id/price"
        android:text="Where?"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/store"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/price"
        android:layout_below="@+id/textView6"
        android:ems="10" />
 
    <TextView
        android:id="@+id/textView7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView6"
        android:layout_below="@+id/store"
        android:text="Description:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/descript"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/store"
        android:layout_below="@+id/textView7"
        android:ems="10" />
 
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignParentTop="true"
        android:text="Item Information"
        android:textAppearance="?android:attr/textAppearanceLarge" />
 
    <Button
        android:id="@+id/picture"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:text="Picture" />
 
    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/picture"
        android:text="Item:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
</RelativeLayout>

The result looks like this:

For this screen, when the user submitted an item, the app shows a list of stores for the user, so he can select one o create a new one, if so, the user is presented two alerts dialogs for receiving inputs from the users. The code looks like this:

def itemNOTfound(client, name, brand, quantity, descript , latitude, longitude , new, barcode):
 
	droid.fullSetProperty("itemname", "text" , name )
 
	droid.fullSetProperty("itembrand", "text" , brand )
 
	droid.fullSetProperty("quantity", "text" , quantity )
 
	droid.fullSetProperty("descript", "text" , descript )
 
	while True:
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the back button:
			if id=="back":
				droid.fullDismiss()
 
				droid.fullShow(menulayout)
 
				#Trigger the decider for this screen
				menu(client)
 
			if id == "submit":
 
				#We extract the information
				name = droid.fullQueryDetail("itemname").result["text"]
 
				brand = droid.fullQueryDetail("itembrand").result["text"]
 
				quantity = droid.fullQueryDetail("quantity").result["text"]
 
				price = droid.fullQueryDetail("price").result["text"]
 
				location = droid.fullQueryDetail("store").result["text"]
 
				descript = droid.fullQueryDetail("descript").result["text"]
 
				#We still need to select the picture
 
				#For the store id:
 
				#We comunicate with the server to know wich stores are close
				client.sendall("storeinratio<>"+latitude+"%/"+longitude)
 
				answer = client.recv(100)
 
				stores = answer.split("<>")
 
				storesnames = ["New Store"]
				storesids = ["-1"]
 
				if len(stores)>1:
					for i in range (1, len(stores)-1):
						storesnames.append(stores[i].split("%/")[0])
						storesids.append(stores[i].split("%/")[1])
 
				#We show the user a list of stores
				droid.dialogCreateAlert("Please select the store you are in", "Or submit a new one")
				droid.dialogSetItems(storesnames)
				droid.dialogShow()
 
				result = droid.dialogGetResponse().result
 
				droid.dialogDismiss()
 
				if result==None:
					print "Error"
 
				elif result.has_key("item"):
					item = result["item"]
					#If the user selects to add a New Store
					if(item == 0):
 
						#We ask for the store's name
						droid.dialogCreateInput("New Store", "Please write the store's name")
						droid.dialogSetPositiveButtonText("Ok")
						droid.dialogShow()
 
						storename = droid.dialogGetResponse().result["value"]
						droid.dialogDismiss()
 
						#We ask for the store's location
						droid.dialogCreateInput("New Store", "Please write the store's location")
						droid.dialogSetPositiveButtonText("Ok")
						droid.dialogShow()
 
						location = droid.dialogGetResponse().result["value"]
						droid.dialogDismiss()
 
 
						client.sendall("addstore<>"+storename+"<>"+location+"<>"+latitude+"%/"+longitude)
 
						answer = client.recv(100)
 
						droid.makeToast(answer)
 
						if (answer.split("<>")[1]=="success"):
							#We extract the store id
							storeid = answer.split("<>")[2]
						else:
							droid.makeToast("Error")
							#We send him to the menu
							droid.fullDismiss()
 
							droid.fullShow(menulayout)
 
							#We execute the menu screen decider
							menu(client)
					else:
						storeid = storesids[item]
						storename = storesnames[item]
 
				#In case is a new item (Depends on the boolean "new")
				if (new == True):
					client.sendall("submititem<>"+barcode+"<>"+name+"<>"+brand+"<>"+quantity+"<>"+descript+"<>0<>"+price+"<>"+storeid)
					print client.recv(100)
				if (new == False):
					client.sendall("edititem<>"+barcode+"<>"+name+"<>"+brand+"<>"+quantity+"<>"+descript+"<>0<>"+price+"<>"+storeid)
					print client.recv(100)
				#We send him to the menu
				droid.makeToast("Thanks for adding products!")
 
				droid.fullDismiss()
 
				droid.fullShow(menulayout)
 
				menu(client)
 
			if id == "add":
				#In case the user wants to add it to one list
				#NOT FUNCTIONING NOW
				exit()
 
			if id == "picture":
				#We take the picture and store it in the default folder
				droid.cameraInteractiveCapturePicture("/sdcard/DCIM/Camera")

The list type of dialog was used in this screen, and it looks like this:

The layout for this screen consist almost entirely of labels that their text can be changed using a command called “droid.fullSetProperty(id, property , parameter ) ”. For this layout, the xml code looks like this:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/background"
	android:background="#ff000000"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
 
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="Item Information"
        android:textAppearance="?android:attr/textAppearanceLarge" />
 
    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:text="Item:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/itemname"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView2"
        android:layout_centerHorizontal="true"
        android:text="ITEM NAME"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:verticalScrollbarPosition="right" />
 
    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/itemname"
        android:text="Brand:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/itembrand"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView4"
        android:layout_centerHorizontal="true"
        android:text="ITEM BRAND"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/itembrand"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/itembrand"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView8"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/itembrand"
        android:text="Quantity"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/quantity"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/itembrand"
        android:layout_below="@+id/textView8"
        android:layout_centerHorizontal="true"
        android:text="ITEM QUANTITY"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView10"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/quantity"
        android:text="Lowest Price:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/lp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView10"
        android:layout_marginTop="14dp"
        android:text="PRICE"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView12"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/lp"
        android:layout_centerHorizontal="true"
        android:text="in"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/lpstore"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/textView12"
        android:layout_alignBottom="@+id/textView12"
        android:layout_alignParentRight="true"
        android:text="STORE"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView14"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/lp"
        android:layout_marginTop="22dp"
        android:text="Closest Lower Price"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/clp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView14"
        android:layout_marginTop="16dp"
        android:text="PRICE"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView16"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/clp"
        android:layout_alignBottom="@+id/clp"
        android:layout_alignLeft="@+id/textView12"
        android:layout_centerHorizontal="true"
        android:text="in"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/clpstore"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/textView16"
        android:layout_alignBottom="@+id/textView16"
        android:layout_alignParentRight="true"
        android:text="STORE"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView18"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/clp"
        android:layout_marginTop="17dp"
        android:text="Description:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/description"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView18"
        android:layout_marginTop="16dp"
        android:text="Here we show a little description"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <Button
        android:id="@+id/back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="20dp"
        android:text="Back" />
 
    <Button
        android:id="@+id/edit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/back"
        android:layout_alignBottom="@+id/back"
        android:layout_centerHorizontal="true"
        android:text="Edit" />
 
    <Button
        android:id="@+id/add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/edit"
        android:layout_alignBottom="@+id/edit"
        android:layout_alignParentRight="true"
        android:text="Add" />
 
</RelativeLayout>

For this event loop, the first thing needed was the actualization of the parameters in the screen, then the normal interaction with the buttons.

def itemfound(name, brand, quantity, lwp, lwpst, clwp, clwpst, descrp, client, barcode, latitude, longitude):
 
	#We upate the screen
 
	droid.fullSetProperty("itemname", "text" , name )
 
	droid.fullSetProperty("itembrand", "text" , brand )
 
	droid.fullSetProperty("quantity", "text" , quantity )
 
	droid.fullSetProperty("lp", "text" , lwp )
 
	droid.fullSetProperty("lpstore", "text" , lwpst )
 
	droid.fullSetProperty("clp", "text" , clwp )
 
	droid.fullSetProperty("clpstore", "text" , clwpst )
 
	droid.fullSetProperty("description", "text" , descrp )
 
	while True:
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the back button:
			if id=="back":
				droid.fullDismiss()
 
				droid.fullShow(menulayout)
 
				#Trigger the decider for this screen
				menu(client)
 
			if id=="edit":
 
				#In case the user wants to edit the item
				#We close the current layout
				droid.fullDismiss()
 
				#Show the itemnotfound layout
				droid.fullShow(itemnotfoundlayout)
 
				itemNOTfound(client, name, brand, quantity, descrp, latitude, longitude, False, barcode)
 
			if id=="Add":
				print "add"
				exit()

The full script is in here:

androidclient.py

#Copyright (C) 2013 Fabian Melendez B.  fabmelb@gmail.com
#https://wiki.arcoslab.eie.ucr.ac.cr/doku.php?id=ie0117_proyectos_2013:way_to_shop
#https://github.com/gmocornejos/Way_To_Shop/wiki
 
#This file is part of Way To Shop.
 
#Way To Shop is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.
 
#Way To Shop is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
 
#You should have received a copy of the GNU General Public License
#along with Way To Shop. If not, see <http://www.gnu.org/licenses/>.
 
import socket, android, time
 
droid = android.Android()
 
# ------------------------------------- Global Variables -------------------------------------- #
username = ""
password = ""
latitude = 00
longitude = 00
 
# -----------------------------Stablishing the conection with the server------------------------------------- #
 
# ---- A function to create the socket ---- #
 
def connectToServer():
 
	#A boolean that indicates if the connection was successful
	conection = False
	#An int that indicates the amount of connection attempts
	count = 0
	while (conection==False):
		conection = True
		try:
			#We add an attempt
			count += 1
 
			#We define the client instance
			client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 
			#The address of the server (IP , PORT)
			server_address = ('192.168.1.111', 10100)
 
			#We try to connect to the server
			client.connect(server_address)
 
			droid.makeToast('Socket created')
 
			#We return the client instance
			return client
 
		#In case the connection failed
		except:
 
			conection = False
 
			#In case we tried to connect several times 
			if(count == 15):
				droid.makeToast("Connection Error")
				#We restart the counter
				count = 1
 
#---------------------------------------- SCREENS METHODS --------------------------------------------------------------#
 
 
#--------LOG IN SCREEN --------#
 
# --DECIDER -- #
 
def login(client):
	while (True):
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the login button:
			if (id=="login"):
 
				username = droid.fullQueryDetail("username").result["text"]
				password = droid.fullQueryDetail("password").result["text"]
 
				#Comunication with the server
 
				message = "login<>"+username+"<>"+password
 
				#For checking
				client.sendall(message)
 
				#Waits for an answer
				answer = client.recv(100)
 
				#The response depends on the server's answer
				if (answer == "login<>success"):
 
					droid.makeToast("Logged In")
 
					droid.fullDismiss()
 
					droid.fullShow(menulayout)
 
					#We execute the menu screen decider
					menu(client)
 
				else:
					droid.makeToast("Invalid Username or Password, Try Again, or SignUp") 
 
			#If it was the sign up button		
			elif (id=="signup"):
 
				#We close the actual screen
				droid.fullDismiss()
 
				#We show the sign screen
				droid.fullShow(signlayout)
 
				#Trigger the decider for this screen
				sign(client)
 
 
# XML code for the graphical layout of the LOGIN SCREEN
 
loginlayout = """
	<RelativeLayout  xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/background"
	android:orientation="vertical"
	android:screenOrientation="portrait"
	android:configChanges="orientation"
	android:layout_width="match_parent"
	android:layout_height="match_parent" android:background="#ff000000">
 
<EditText
	android:id="@+id/username"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignParentTop="true"
	android:layout_centerHorizontal="true"
	android:layout_marginTop="132dp"
	android:ems="10"
	android:inputType="textPersonName" >
 
	<requestFocus />
</EditText>
 
<Button
	android:id="@+id/login"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignLeft="@+id/username"
	android:layout_alignParentBottom="true"
	android:layout_marginBottom="27dp"
	android:text="LogIn" />
 
<Button
	android:id="@+id/signup"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignBaseline="@+id/login"
	android:layout_alignBottom="@+id/login"
	android:layout_alignRight="@+id/password"
	android:layout_marginRight="17dp"
	android:text="Sign Up" />
 
<EditText
	android:id="@+id/password"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_below="@+id/pass"
	android:layout_centerHorizontal="true"
	android:layout_marginTop="26dp"
	android:ems="10"
	android:inputType="textPassword" />
 
<TextView
	android:id="@+id/pass"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignLeft="@+id/user"
	android:layout_centerVertical="true"
	android:text="Password"
	android:textAppearance="?android:attr/textAppearanceLarge" />
 
<TextView
	android:id="@+id/user"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_alignBottom="@+id/username"
	android:layout_centerHorizontal="true"
	android:layout_marginBottom="73dp"
	android:text="Username"
	android:textAppearance="?android:attr/textAppearanceLarge" />
 
</RelativeLayout>"""
 
 
#--------SIGN SCREEN --------#
 
# --Decider-- #
def sign(client):
	while True:
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the signup button:
			if id=="signin":
 
				#We extract the information from the textboxes
 
				username = droid.fullQueryDetail("user").result["text"]
 
				password = droid.fullQueryDetail("passw").result["text"]
 
				name = droid.fullQueryDetail("name").result["text"]
 
				email = droid.fullQueryDetail("email").result["text"]
 
				#We comuncate with the server
				message = "signup<>"+username+"<>"+password+"<>"+name+"<>"+email
				client.sendall(message)
 
				answer = client.recv(100)
 
				if answer == "signup<>success":
 
					droid.makeToast("Welcome! You are now sign up to Way To Shop!")
 
					#We close the current layout
					droid.fullDismiss()
 
					#We send the user to the menu screen
					droid.fullShow(menulayout)
 
					#The decider
					menu(client)
 
				else:
					droid.makeToast("Error check your username or password information")
 
					droid.fullDismiss()
 
					droid.fullShow(signlayout)
 
					sign(client)
 
 
			if id=="back":
				droid.fullDismiss()
 
				droid.fullShow(loginlayout)
 
				login(client)
 
#XML Layout
signlayout = """
<RelativeLayout 
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/background"
	android:orientation="vertical"
	android:screenOrientation="portrait"
	android:configChanges="orientation"
	android:layout_width="match_parent"
	android:layout_height="match_parent" android:background="#ff00000">
 
	<Button
		android:id="@+id/signin"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignBaseline="@+id/back"
		android:layout_alignBottom="@+id/back"
		android:layout_alignRight="true"
		android:text="SignIn" />
 
	<TextView
		android:id="@+id/textView2"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/textView1"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="18dp"
		android:text="Username:"
		android:textAppearance="?android:attr/textAppearanceMedium" />
 
	<EditText
		android:id="@+id/user"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/textView2"
		android:layout_centerHorizontal="true"
		android:ems="10" />
 
	<TextView
		android:id="@+id/textView3"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/user"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="27dp"
		android:text="Password"
		android:textAppearance="?android:attr/textAppearanceMedium" />
 
	<EditText
		android:id="@+id/passw"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/textView3"
		android:layout_centerHorizontal="true"
		android:ems="10" />
 
	<TextView
		android:id="@+id/textView4"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/passw"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="17dp"
		android:text="Name"
		android:textAppearance="?android:attr/textAppearanceMedium" />
 
	<Button
		android:id="@+id/back"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignParentBottom="true"
		android:layout_alignParentLeft="true"
		android:text="Back" />
 
	<TextView
		android:id="@+id/textView1"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignParentTop="true"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="18dp"
		android:text="Sign Up Information"
		android:textAppearance="?android:attr/textAppearanceLarge" />
 
	<EditText
		android:id="@+id/name"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignLeft="@+id/passw"
		android:layout_below="@+id/textView4"
		android:ems="10" />
 
	<TextView
		android:id="@+id/textView5"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_below="@+id/name"
		android:layout_centerHorizontal="true"
		android:layout_marginTop="17dp"
		android:text="Email"
		android:textAppearance="?android:attr/textAppearanceMedium" />
 
	<EditText
		android:id="@+id/email"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_alignLeft="@+id/name"
		android:layout_below="@+id/textView5"
		android:ems="10" >
 
		<requestFocus />
	</EditText>
 
</RelativeLayout>
"""	
 
#--------MENU SCREEN --------#
 
# -- Decider -- #
def menu (client):
	while True:
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the signup button:
			if id=="scan":
 
				#We scan the barcode
				code = droid.scanBarcode()
				#Extract the code
				bar = code[1]['extras']['SCAN_RESULT']
 
				#We start a loading alert
				droid.dialogCreateSpinnerProgress("Loading", "Please Wait")
				droid.dialogShow()
 
 
				#We start locating the client
				droid.startLocating()
				time.sleep(10)
				location = droid.readLocation().result
 
				#In case that the location failed, we get the last known location
				if (location == {}):
					location = droid.getLastKnownLocation().result
 
				#When we already have one known location
				if (location != {}):
					try:
						result = location['gps']
					except:
						result = location['network']
					#We extract the latitude and longitude from the lecture
					latitude = result['latitude']
					longitude = result['longitude']
					#address = droid.geocode(latitude, longitude).result
 
				#We stop locating
				droid.stopLocating()
 
				#We close the loading alert
				droid.dialogDismiss()
 
				#Now we comunicate with the server
 
				#seekitem<>barcode<>latitude%/longitude
				client.sendall("seekitem<>"+str(bar)+"<>"+str(latitude)+"%/"+str(longitude))
 
				#We wait for an answer
				answer = client.recv(100)
 
				if (answer == "seekitem<>notfound"):
 
					#We ask if the user wants to add the item (By alert Box)
 
					droid.dialogCreateAlert("Item not found", "Would you like to add it?")
					droid.dialogSetPositiveButtonText("Yes")
					droid.dialogSetNegativeButtonText("No")
					droid.dialogShow()
 
					#Wait for a response
					response=droid.dialogGetResponse().result
					#Close the dialog
					droid.dialogDismiss()
 
 
					if response.has_key("which"):
					  result=response["which"]
 
					  #If the user answered yes we send him to the itemnotfound screen
					  if result=="positive":
						#In case the user wants to add the item, we send him to the item not found screen
						droid.fullDismiss()
 
						droid.fullShow(itemnotfoundlayout)
 
						itemNOTfound(client, " ", " ", " ", " " , str(latitude), str(longitude) , True, str(bar))
 
					  elif result=="negative":
						#In this case we send the user back to the menu				
						droid.fullDismiss()
 
						droid.fullShow(menulayout)
 
						#We execute the menu decider
						menu(client)
				#In case the item was found
				else:
					responseArray = answer.split("<>")
					try:
						#We extract the information from the message
						name = responseArray[1]
						brand = responseArray[2]
						quantity = responseArray[3]
						description = responseArray[4]
						image = responseArray[5]
						lowestprice = responseArray[6]
						lowestpricestore = responseArray[7]
						closestlowerprice = responseArray[8]
						closestlowerpricestore = responseArray[9]
 
						#And we show it in the item found screen
						droid.fullDismiss()
 
						droid.fullShow(itemfoundlayout)
 
						itemfound(name, brand, quantity, lowestprice, lowestpricestore, closestlowerprice, closestlowerpricestore, description, client, str(bar), str(latitude), str(longitude))
 
					except:
						#In case it fails
						droid.makeToast("Error")
						#Back to the menu
						droid.fullDismiss()
 
						droid.fullShow(menulayout)
 
						#We execute the menu decider
						menu(client)
 
			if id == "waytoshop":
				#Not reay yet
				exit() 		
 
#XML Layout
menulayout = """
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/background"
 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ff00000"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"  >
 
    <Button
        android:id="@+id/waytoshop"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/scan"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="126dp"
        android:text="Way To Shop!" />
 
    <Button
        android:id="@+id/scan"
        android:layout_marginTop="117dp"       
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/waytoshop"
        android:layout_alignParentTop="true"
        android:text="Scan Barcode" />
 
</RelativeLayout>"""
 
 
#--------ITEM FOUND ---------#
 
#-- Decider --- #
def itemfound(name, brand, quantity, lwp, lwpst, clwp, clwpst, descrp, client, barcode, latitude, longitude):
 
	#We upate the screen
 
	droid.fullSetProperty("itemname", "text" , name )
 
	droid.fullSetProperty("itembrand", "text" , brand )
 
	droid.fullSetProperty("quantity", "text" , quantity )
 
	droid.fullSetProperty("lp", "text" , lwp )
 
	droid.fullSetProperty("lpstore", "text" , lwpst )
 
	droid.fullSetProperty("clp", "text" , clwp )
 
	droid.fullSetProperty("clpstore", "text" , clwpst )
 
	droid.fullSetProperty("description", "text" , descrp )
 
	while True:
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the back button:
			if id=="back":
				droid.fullDismiss()
 
				droid.fullShow(menulayout)
 
				#Trigger the decider for this screen
				menu(client)
 
			if id=="edit":
 
				#In case the user wants to edit the item
				#We close the current layout
				droid.fullDismiss()
 
				#Show the itemnotfound layout
				droid.fullShow(itemnotfoundlayout)
 
				itemNOTfound(client, name, brand, quantity, descrp, latitude, longitude, False, barcode)
 
			if id=="Add":
				print "add"
				exit()
 
#XML Layout
itemfoundlayout = """
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/background"
	android:background="#ff000000"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
 
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="Item Information"
        android:textAppearance="?android:attr/textAppearanceLarge" />
 
    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:text="Item:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/itemname"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView2"
        android:layout_centerHorizontal="true"
        android:text="ITEM NAME"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:verticalScrollbarPosition="right" />
 
    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/itemname"
        android:text="Brand:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/itembrand"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView4"
        android:layout_centerHorizontal="true"
        android:text="ITEM BRAND"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/itembrand"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/itembrand"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView8"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/itembrand"
        android:text="Quantity"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/quantity"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/itembrand"
        android:layout_below="@+id/textView8"
        android:layout_centerHorizontal="true"
        android:text="ITEM QUANTITY"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView10"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/quantity"
        android:text="Lowest Price:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/lp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView10"
        android:layout_marginTop="14dp"
        android:text="PRICE"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView12"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/lp"
        android:layout_centerHorizontal="true"
        android:text="in"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/lpstore"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/textView12"
        android:layout_alignBottom="@+id/textView12"
        android:layout_alignParentRight="true"
        android:text="STORE"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView14"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/lp"
        android:layout_marginTop="22dp"
        android:text="Closest Lower Price"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/clp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView14"
        android:layout_marginTop="16dp"
        android:text="PRICE"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView16"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/clp"
        android:layout_alignBottom="@+id/clp"
        android:layout_alignLeft="@+id/textView12"
        android:layout_centerHorizontal="true"
        android:text="in"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/clpstore"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/textView16"
        android:layout_alignBottom="@+id/textView16"
        android:layout_alignParentRight="true"
        android:text="STORE"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/textView18"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/clp"
        android:layout_marginTop="17dp"
        android:text="Description:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <TextView
        android:id="@+id/description"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView18"
        android:layout_marginTop="16dp"
        android:text="Here we show a little description"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <Button
        android:id="@+id/back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="20dp"
        android:text="Back" />
 
    <Button
        android:id="@+id/edit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/back"
        android:layout_alignBottom="@+id/back"
        android:layout_centerHorizontal="true"
        android:text="Edit" />
 
    <Button
        android:id="@+id/add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/edit"
        android:layout_alignBottom="@+id/edit"
        android:layout_alignParentRight="true"
        android:text="Add" />
 
</RelativeLayout>
"""
 
#--------ITEM NOT FOUND ---------#
 
#-- Decider --- #
 
def itemNOTfound(client, name, brand, quantity, descript , latitude, longitude , new, barcode):
 
	droid.fullSetProperty("itemname", "text" , name )
 
	droid.fullSetProperty("itembrand", "text" , brand )
 
	droid.fullSetProperty("quantity", "text" , quantity )
 
	droid.fullSetProperty("descript", "text" , descript )
 
	while True:
		#Waits for an event
		event=droid.eventWait().result
		print event
 
		#If a button is clicked
		if event["name"]=="click":
 
			#Gets the id of the clicked button
			id=event["data"]["id"]
 
			#If it was the back button:
			if id=="back":
				droid.fullDismiss()
 
				droid.fullShow(menulayout)
 
				#Trigger the decider for this screen
				menu(client)
 
			if id == "submit":
 
				#We extract the information
				name = droid.fullQueryDetail("itemname").result["text"]
 
				brand = droid.fullQueryDetail("itembrand").result["text"]
 
				quantity = droid.fullQueryDetail("quantity").result["text"]
 
				price = droid.fullQueryDetail("price").result["text"]
 
				location = droid.fullQueryDetail("store").result["text"]
 
				descript = droid.fullQueryDetail("descript").result["text"]
 
				#We still need to select the picture
 
				#For the store id:
 
				#We comunicate with the server to know wich stores are close
				client.sendall("storeinratio<>"+latitude+"%/"+longitude)
 
				answer = client.recv(100)
 
				stores = answer.split("<>")
 
				storesnames = ["New Store"]
				storesids = ["-1"]
 
				if len(stores)>1:
					for i in range (1, len(stores)-1):
						storesnames.append(stores[i].split("%/")[0])
						storesids.append(stores[i].split("%/")[1])
 
				#We show the user a list of stores
				droid.dialogCreateAlert("Please select the store you are in", "Or submit a new one")
				droid.dialogSetItems(storesnames)
				droid.dialogShow()
 
				result = droid.dialogGetResponse().result
 
				droid.dialogDismiss()
 
				if result==None:
					print "Error"
 
				elif result.has_key("item"):
					item = result["item"]
					#If the user selects to add a New Store
					if(item == 0):
 
						#We ask for the store's name
						droid.dialogCreateInput("New Store", "Please write the store's name")
						droid.dialogSetPositiveButtonText("Ok")
						droid.dialogShow()
 
						storename = droid.dialogGetResponse().result["value"]
						droid.dialogDismiss()
 
						#We ask for the store's location
						droid.dialogCreateInput("New Store", "Please write the store's location")
						droid.dialogSetPositiveButtonText("Ok")
						droid.dialogShow()
 
						location = droid.dialogGetResponse().result["value"]
						droid.dialogDismiss()
 
 
						client.sendall("addstore<>"+storename+"<>"+location+"<>"+latitude+"%/"+longitude)
 
						answer = client.recv(100)
 
						droid.makeToast(answer)
 
						if (answer.split("<>")[1]=="success"):
							#We extract the store id
							storeid = answer.split("<>")[2]
						else:
							droid.makeToast("Error")
							#We send him to the menu
							droid.fullDismiss()
 
							droid.fullShow(menulayout)
 
							#We execute the menu screen decider
							menu(client)
					else:
						storeid = storesids[item]
						storename = storesnames[item]
 
				#In case is a new item (Depends on the boolean "new")
				if (new == True):
					client.sendall("submititem<>"+barcode+"<>"+name+"<>"+brand+"<>"+quantity+"<>"+descript+"<>0<>"+price+"<>"+storeid)
					print client.recv(100)
				if (new == False):
					client.sendall("edititem<>"+barcode+"<>"+name+"<>"+brand+"<>"+quantity+"<>"+descript+"<>0<>"+price+"<>"+storeid)
					print client.recv(100)
				#We send him to the menu
				droid.makeToast("Thanks for adding products!")
 
				droid.fullDismiss()
 
				droid.fullShow(menulayout)
 
				menu(client)
 
			if id == "add":
				#In case the user wants to add it to one list
				#NOT FUNCTIONING NOW
				exit()
 
			if id == "picture":
				#We take the picture and store it in the default folder
				droid.cameraInteractiveCapturePicture("/sdcard/DCIM/Camera")
 
 
#XML Layout
 
itemnotfoundlayout = """
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/background"
	android:orientation="vertical"
	android:screenOrientation="portrait"
	android:configChanges="orientation"
	android:background="#ff00000" >
 
    <Button
        android:id="@+id/Add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/back"
        android:layout_alignBottom="@+id/back"
        android:layout_alignParentRight="true"
        android:text="Add" />
 
    <Button
        android:id="@+id/back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="23dp"
        android:text="Back" />
 
    <Button
        android:id="@+id/submit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/Add"
        android:layout_alignBottom="@+id/Add"
        android:layout_centerHorizontal="true"
        android:text="Submit" />
 
    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_below="@+id/itemname"
        android:text="Brand:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/itembrand"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView3"
        android:layout_centerHorizontal="true"
        android:ems="10" />
 
    <EditText
        android:id="@+id/itemname"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/itembrand"
        android:layout_alignRight="@+id/itembrand"
        android:layout_below="@+id/textView2"
        android:ems="10" >
 
        <requestFocus />
    </EditText>
 
    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView3"
        android:layout_below="@+id/itembrand"
        android:text="Quantity:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/quantity"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/itembrand"
        android:layout_below="@+id/textView4"
        android:ems="10" />
 
    <TextView
        android:id="@+id/textView5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView4"
        android:layout_below="@+id/quantity"
        android:text="Price:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/price"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/quantity"
        android:layout_below="@+id/textView5"
        android:ems="10" />
 
    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView5"
        android:layout_below="@+id/price"
        android:text="Where?"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/store"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/price"
        android:layout_below="@+id/textView6"
        android:ems="10" />
 
    <TextView
        android:id="@+id/textView7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView6"
        android:layout_below="@+id/store"
        android:text="Description:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <EditText
        android:id="@+id/descript"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/store"
        android:layout_below="@+id/textView7"
        android:ems="10" />
 
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignParentTop="true"
        android:text="Item Information"
        android:textAppearance="?android:attr/textAppearanceLarge" />
 
    <Button
        android:id="@+id/picture"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:text="Picture" />
 
    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/picture"
        android:text="Item:"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
</RelativeLayout>
"""
 
#----------------------------------------------------------------------------------------------#
#------------------------------------A Kind of Main--------------------------------------------#
#----------------------------------------------------------------------------------------------#
 
#First We Connect To the Server
 
client = connectToServer()
 
 
#We show the loginlayout
 
droid.fullShow(loginlayout)
 
#We execute the login screen decider, now on, the app controls itself with the previous methods 
login(client)

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