Android Source Codes

Passing data between activities in Android

Objective :

  • Passing data between activities in Android
  • Passing multiple data between activities in Android
  • Passing array between activities in Android
  • Passing ArrayList between activities in Android
  • Passing ArrayList to another activity in Android
  • Sending data via Intent in Android
  • Sending multiple data via Intent in Android
  • Sending array between activities in Android
  • Sending ArrayList between activities in Android
  • Sending ArrayList to another activity in Android
  • Sending data via Intent and Bundle in Android
  • Sending multiple data via Intent and Bundle in Android
  • Passing array between activities in Android using Intent and Bundle
  • How to pass array to another activity in Android?
  • How to pass array between activities in Android?
  • How to pass data to another activity in Android?
  • How to pass data to activity in Android?
  • How to pass data to between activities in Android?
  • How to pass ArrayList to another activity in Android?
  • How to pass ArrayList between activities in Android?

 

Code for passing data between activities in Android :

ActivityOne.java

[sourcecode lang=”java”]

String value = "Hello!";
Intent in = new Intent(this,ActivityTwo.class);
in.putExtra("Key", value);
startActivity(in);

[/sourcecode]

ActivityTwo.java

[sourcecode lang=”java”]

Bundle bundle = getIntent().getExtras();
String valueReceived = bundle .getString("Key");

[/sourcecode]

 

Code for passing multiple data or values between activities in Android :

Method 1 : Using Intent to pass data and Bundle to extract data between activities in Android

ActivityOne.java

[sourcecode lang=”java”]

String value1 = "Hello!";
String value2 = "Hi!";
Intent in = new Intent(this,ActivityTwo.class);
in.putExtra("Key1", value1);
in.putExtra("Key2", value2);
startActivity(in);
[/sourcecode]

ActivityTwo.java

[sourcecode lang=”java”]
Bundle bundle = getIntent().getExtras();
String valueReceived1 = bundle .getString("Key1");
String valueReceived2 = bundle .getString("Key2");
[/sourcecode]

 

Method 2 : Using Bundle to pass and to extract data between activities in Android

ActivityOne.java

[sourcecode lang=”java”]

String value1 = "Hello!";
String value2 = "Hi!";
Intent in = new Intent(this,ActivityTwo.class);
Bundle bundle = new Bundle();
bundle.putString("Key1", value1);
bundle.putString("Key2", value2);
in.putExtras(bundle);
startActivity(in);
[/sourcecode]

ActivityTwo.java

[sourcecode lang=”java”]
Bundle bundle = getIntent().getExtras();
String valueReceived1 = bundle .getString("Key1");
String valueReceived2 = bundle .getString("Key2");
[/sourcecode]

 

Code for passing array between activities in Android :

ActivityOne.java

[sourcecode lang=”java”]
String[] array = new String[]{"Item1", "Item2", "item3", "Item4", "item5"};
Intent in = new Intent(this,ActivityTwo.class);
Bundle bundle = new Bundle();
bundle.putStringArray("MyArray", array);
in.putExtras(bundle);
startActivity(in);
[/sourcecode]

ActivityTwo.java

[sourcecode lang=”java”]
Bundle bundle = getIntent().getExtras();
String arrayReceived[] = bundle.getStringArray("MyArray");
[/sourcecode]

 

Code for passing ArrayList between activities in Android :

ActivityOne.java

[sourcecode lang=”java”]
ArrayList<String> array = new ArrayList<String>();
array.add("Hello");
array.add("Hi");
array.add("Bye");
Intent intent = new Intent(this, ActivityTwo.class);
intent.putExtra("array_list", array);
startActivity(intent);
[/sourcecode]

ActivityTwo.java

[sourcecode lang=”java”]
Bundle bundle = getIntent().getExtras();
ArrayList<String> array = (ArrayList<String>) bundle.getStringArrayList("array_list");
[/sourcecode]



Have fun with Intent.

				
								
			

		

	

	
	

		

			March 19, 2016
			by 
			Android Source Codes Android Tutorials Java Source Code Java Tutorials
							1
					

	



								

	
	
	

		

			

				

			

		

	

	
	

		

			
AutoScroll TextView Demo

		

		

												

		

			

				
								
					
Objectives :

– How to use TextView in Android?

– How to scroll Text in Android?

– How to implement Marquee Text in Android?

– How to make text scrollable in Android?


Getting Started :

1. Create a New Android Application titled as “AutoscrollTextviewDemo” with blank activity.

2. Update the layout xml with code given below.


How to do it?

Here is the XML code for Auto Scroll TextView, update your layout xml file with code below.


[code language=”xml” 1=”highlight(14,15,16,17,18)”]

<LinearLayout xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical" >


<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="AutoScroll TextView" />


<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:singleLine="true"

android:scrollHorizontally="true"

android:ellipsize="marquee"

android:marqueeRepeatLimit ="marquee_forever"

android:focusable="true"

android:focusableInTouchMode="true"

android:text="This is small example for auto scroll text view simply using XML, no need to code Java. Hope you like it! Try it on your own, it is very easy to perform" />


</LinearLayout>

[/code]


Download Source Code

Output :


Output in Potrait mode
Output in Potrait mode


Output in Landscape mode
Output in Landscape mode


This is small example for auto scroll text view simply using XML, no need to code Java. Hope you like it! Try it on your own, it is very easy to perform.


Click here to download source code.

				
								
			

		

	

	
	

		

			September 25, 2013
			by 
			Android Source Codes Android Tutorials
							4
					

	



								

	
	
	

		

			

				

			

		

	

	
	

		

			
Taking text input in Android via EditText

		

		

												

		

			

				
								
					
Objectives :


    

  • How to take input in Android?
    • 

  • How to take text input in Android?
    • 

  • How to use EditText in Android?
    • 

  • How to take multiline input in Android?
    • 



If you wish to take text input in Android, you can use <EditText> to take the text input in Android.


Here is the small example showing different uses of EditText. EditText can be also used to take multiline input as that of textarea.


[sourcecode language=”xml”]


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

 xmlns:tools="http://schemas.android.com/tools"

 android:layout_width="fill_parent"

 android:layout_height="fill_parent"

 android:orientation="vertical" >


<TextView

 android:layout_width="fill_parent"

 android:layout_height="wrap_content"

android:text="First Name" />


<EditText

 android:layout_width="fill_parent"

 android:layout_height="wrap_content"

 android:inputType="text"

 android:id="@+id/EditTextFirstName"

 android:hint="First Name" />


<TextView

 android:layout_width="fill_parent"

 android:layout_height="wrap_content"

 android:text="Cell No" />


<EditText

 android:layout_width="fill_parent"

 android:layout_height="wrap_content"

 android:inputType="number"

 android:hint="Cell No." />


 <TextView

 android:layout_width="fill_parent"

 android:layout_height="wrap_content"

 android:text="Email ID" />


<EditText

 android:layout_width="fill_parent"

 android:layout_height="wrap_content"

 android:inputType="textEmailAddress"

 android:hint="Email Name" />


 <TextView

 android:layout_width="fill_parent"

 android:layout_height="wrap_content"

 android:text="Message" />


<EditText

 android:id="@+id/editText1"

 android:layout_width="fill_parent"

 android:layout_height="wrap_content"

 android:inputType="textMultiLine"

 android:lines="5" />


</LinearLayout>


[/sourcecode]


Multiline Input in Android


If you need, you can use the same <EditText> to take multiline input as per the code snippet given below :


[sourcecode language=”xml”]

<EditText

 android:id="@+id/editText1"

 android:layout_width="fill_parent"

 android:layout_height="wrap_content"

 android:inputType="textMultiLine"

 android:lines="5" />

[/sourcecode]


Here, android:inputType=”textMultiLine” will convert the single line text input into multi line input and android:lines=”5″ will give 5 (five) visible lines input.

				
								
			

		

	

	
	

		

			August 13, 2013
			by 
			Android Source Codes Android Tutorials
							0
					

	



								

	
	
	

		

			

				

			

		

	

	
	

		

			
Working with Layouts in Android

		

		

												

		

			

				
								
					


Objectives :


    

  • Which layouts does Android have?
    • 

  • How to implement a layout in Android?
    • 

  • How to use different layouts in Android?
    • 

  • How to use Linear Layout in Android?
    • 

  • How to use Relative Layout in Android?
    • 

  • How to use Absolute Layout in Android?
    • 

  • How to use Frame Layout in Android?
    • 

  • How to use Table Layout in Android?
    • 

  • How to use nested layouts in Android?
    • 

  • How to use a layout inside another layout in Android?
    • 



In Android, there are main five (5) layouts which are as follows;


    

  1. Linear Layout
    2. 

  2. Relative Layout
    3. 

  3. Absolute Layout
    4. 

  4. Table Layout
    5. 

  5. Frame Layout
    6. 



Here I have used the same form controls/components in form to show how it looks in different layouts except Frame Layout.


Linear Layout in Android


Here I have used nested linear layout.


XML Code for Linear Layout :


[sourcecode language=”xml”]


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

 android:orientation="vertical"

 android:layout_width="fill_parent"

 android:layout_height="fill_parent">


<LinearLayout

 android:orientation="horizontal"

 android:layout_width="fill_parent"

 android:layout_height="wrap_content">


<TextView

 android:text="User Name"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


<EditText

 android:width="100px"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


</LinearLayout>


<LinearLayout

 android:orientation="horizontal"

 android:layout_width="fill_parent"

 android:layout_height="wrap_content">


<TextView

 android:text="Password"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


<EditText

 android:width="100px"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


</LinearLayout>


</LinearLayout>


[/sourcecode]


Here android:orientation=”vertical” will render controls in vertical manner and android:orientation=”horizontal” will render controls in horizontal manner.


Relative Layout in Android


Here in Relative layout we don’t need to nest layouts generally.


XML Code for Relative Layout :


[sourcecode language=”xml”]


<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="fill_parent"

xmlns:android="http://schemas.android.com/apk/res/android">


<TextView

 android:id="@+id/userName"

 android:text="First Name"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


<EditText

 android:id="@+id/editUserName"

 android:width="100px"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:layout_toRightOf="@id/userName"

 android:layout_below="@id/userName"/>


<EditText

 android:id="@+id/editpassword"

 android:width="100px"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:layout_below="@id/editUserName"

 android:layout_alignLeft="@id/editUserName"/>


<TextView

 android:id="@+id/password"

 android:text="Password"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:layout_toLeftOf="@id/editpassword"

 android:layout_below="@id/editUserName" />


</RelativeLayout>


[/sourcecode]


Here we need to specify android:layout_toLeftOf=”@id/controlId”, android:layout_toRightOf=”@id/controlId”, android:layout_below=”@id/controlId”, android:layout_alignLeft=”@id/controlId”, etc. parameters so as to render the control at particular place.


Absolute Layout in Android


Here in Absolute Layout we need to specify exact pixel location or (x,y) coordinate where we need to render our controls.


XML Code for Absolute Layout :


[sourcecode language=”xml”]

<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent">


<TextView

 android:layout_x="10px"

 android:layout_y="110px"

 android:text="User Name"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


<EditText

 android:layout_x="150px"

 android:layout_y="100px"

 android:width="100px"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


<TextView

 android:layout_x="10px"

 android:layout_y="160px"

 android:text="Password"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


<EditText

 android:layout_x="150px"

 android:layout_y="150px"

 android:width="100px"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


</AbsoluteLayout>


[/sourcecode]


Table Layout in Android


Whenever you need to manage data in tabular manner, you can use Table Layout. Table Layout will help you to show data in rows and columns.

Here is the sample code showing how to use Table Layout :


[sourcecode language=”xml”]

<TableLayout

 android:layout_width="fill_parent"

 android:layout_height="fill_parent"

 xmlns:android="http://schemas.android.com/apk/res/android">


<TableRow>


<TextView

 android:text="User Name"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:layout_column="1" />


<EditText

 android:width="100px"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


</TableRow>


<TableRow>


<TextView

 android:text="Password"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:layout_column="1" />


<EditText

 android:width="100px"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content" />


</TableRow>


</TableLayout>

[/sourcecode]


Here in Table Layout, we use <TableRow> tag to add contents to a row same as that of HTML.


Frame Layout in Android


Frame Layout can be used to display various contents such as text, images, videos, image galleries, etc.

Sample code for Frame Layout is as follows :


[sourcecode language=”xml”]<FrameLayout

android:layout_width="fill_parent"

android:layout_height="fill_parent"

xmlns:android="http://schemas.android.com/apk/res/android">


<TextView

android:text="http://aatul.me"

android:textSize="24sp"

android:textColor="#000000"

android:layout_height="fill_parent"

android:layout_width="fill_parent"

android:gravity="center"/>


</FrameLayout>

[/sourcecode]

				
								
			

		

	

	
	

		

			August 5, 2013
			by 
			Android Source Codes Android Tutorials
							1
					

	



								

	
	
	

		

			

				

			

		

	

	
	

		

			
Adding TextView in Android

		

		

												

		

			

				
								
					


Objectives :


    

  • How to set TextView in Android?
    • 

  • How to add TextView in Android?
    • 

  • How to add TextView in Android via Java program?
    • 

  • How to set Layout parameters from Java code in Android?
    • 





TextView is a one of the Views available in Android. There are two (2) ways to add TextView in your Android application as follows :


    

  1. Using XML code
    2. 

  2. Using Java code
    3. 





XML Code example – Adding to a TextView in a layout xml file


[sourcecode language=”xml”]

<?xml version="1.0" encoding="utf-8"?>


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

 xmlns:tools="http://schemas.android.com/tools"

 android:layout_width="fill_parent"

 android:layout_height="fill_parent"

 android:orientation="vertical" >


 <TextView

  android:id="@+id/textView"

  android:layout_width="wrap_content"

  android:layout_height="wrap_content"

  android:text="Hello World" />


</LinearLayout>

[/sourcecode]


 


Java Code example – Creating and adding a new TextView to a Layout


[sourcecode language=”java”]

// Creates object of TextView

TextView textView = new TextView(this);

// Set text to display in TextView on Screen

textView.setText(“Hello World”);

// Add TextView to Linear Layout with layout parameters

((LinearLayout)findViewById(R.id.mainLayout))

 .addView(textView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

[/sourcecode]


Above Java code can be written in onCreate() of your Activity.


Here LayoutParams.FILL_PARENT will set layout height to FILL_PARENT, LayoutParams.WRAP_CONTENT will set layout width to WRAP_CONTENT.


Posted from WordPress for Android

				
								
			

		

	

	
	

		

			July 30, 2013
			by 
			Android Source Codes Android Tutorials
							2
					

	



								

	
	
	

		

			

				

			

		

	

	
	

		

			
Writing HelloWorld in Android

		

		

												

		

			

				
								
					
Objective :


    

  • How to write HelloWorld Application in Android?
    • 

  • How to write HelloWorld App in Android?
    • 

  • How to write HelloWorld in Android?
    • 



To create HelloWorldApp follow the steps below :


    

  • Go to File Menu > Go to New > Click on Android Application Project.
    • 





    

  • In New Android Application Window, enter Application Name as “HelloWorldApp”. Do not change anything else and click Next.
    • 





    

  • While you are in Configure Project Window, uncheck the Create custom launcher icon. Do not change anything else. Click Next.
    • 





    

  • In Create Activity window, click Next.
    • 





    

  • In Blank Activity Window, change the Activity Name to “HelloWorldApp”. Do not change anything else. Click Finish. And your HelloWorldApp Android application will be created.
    • 





Here is snapshot of HelloWorldApp project structure :


HelloWorldApp Project Structure in Android


XML Code for UI


File : activity_hello_world_app.xml


[sourcecode language=”xml”]


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

 xmlns:tools="http://schemas.android.com/tools"

 android:layout_width="fill_parent"

 android:layout_height="fill_parent"

 android:orientation="vertical" >


<TextView

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:text="@string/hello_world" />


</RelativeLayout>

[/sourcecode]


XML code which manages all the string items or labels.


File : strings.xml


[sourcecode language=”xml”]

<?xml version="1.0" encoding="utf-8"?>

<resources>

<string name="app_name">HelloWorldApp</string>

 <string name="action_settings">Settings</string>

 <string name="hello_world">Hello world!</string>

</resources>


[/sourcecode]


Java Code


File : HelloWorldApp.java


[sourcecode language=”java”]

package com.example.helloworldapp;


import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;


public class HelloWorldApp extends Activity {


@Override

 public void onCreate(Bundle savedInstanceState) {

 super.onCreate(savedInstanceState);

 setContentView(R.layout.activity_hello_world_app);

 }


}

[/sourcecode]


After writing your code, to run this snippet you need an AVD (Android Virtual Device) or Emulator. Here is tutorial link which will help you to create AVD so as to run your Android application.

				
								
			

		

	

	
	

		

			July 29, 2013
			by 
			Android Source Codes Android Tutorials
							2