Set Wallpaper in Android

Easy Way to Android Set Wallpaper

There is a easy way to set the wallpaper from the resources folder of your application to the android smartphone.You can set it through program.

1. Add the permissions in the Android Manifest file.

<uses-permission android:name="android.permission.SET_WALLPAPER" />

2. MainActivity.java

import java.io.IOException;

import android.os.Bundle;

import android.app.Activity;

import android.app.WallpaperManager;

import android.view.Menu;

public class MainActivity extends Activity {

 @Override

 protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_main);

  

  //android wallpaper manager

  WallpaperManager myWallpaperManager = WallpaperManager

    .getInstance(getApplicationContext());

  try {

   //set wallpaper picture from resource here

   myWallpaperManager.setResource(R.drawable.android_wallpaper);

   Toast.makeText(getApplicationContext(),"Success set as wallpaper",Toast.LENGTH_SHORT).show();

  } catch (IOException e) {

   Toast.makeText(getApplicationContext(),"Error on setting as wallpaper",Toast.LENGTH_SHORT).show();

  }

 }

}   

3. Now run your Application.(Dont Forget to put an image in res/drawable folder named android_wallpaper)

Thank you.

Multiple Button Click Listener

Multiple Button Listener

Now we'll learn how to manage Multiple Button click Event Listener.
As you have learn the single button click event in previous tutorial.
Now we'll Move to the Multiple Buttons Tutorial.

1.activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" 
    android:orientation="vertical">

    <Button
        android:id="@+id/btn1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="test1" />
    <Button
        android:id="@+id/btn2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="test2" />
    <Button
        android:id="@+id/btn3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="test3" />
    <Button
        android:id="@+id/btn4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="test4" />


</LinearLayout>


2.MainActivity.java

package com.sri.buttontest;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener{
Button btn1,btn2,btn3,btn4;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1 = (Button) findViewById(R.id.btn1);
btn2 = (Button) findViewById(R.id.btn2);
btn3 = (Button) findViewById(R.id.btn3);
btn4 = (Button) findViewById(R.id.btn4);
btn1.setOnClickListener(this);
btn2.setOnClickListener(this);
btn3.setOnClickListener(this);
btn4.setOnClickListener(this);
}

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.btn1:
Toast.makeText(getApplicationContext(), "test1 is clicked", Toast.LENGTH_LONG).show();
break;
case R.id.btn2:
Toast.makeText(getApplicationContext(), "test2 is clicked", Toast.LENGTH_LONG).show();
break;
case R.id.btn3:
Toast.makeText(getApplicationContext(), "test3 is clicked", Toast.LENGTH_LONG).show();
break;
case R.id.btn4:
Toast.makeText(getApplicationContext(), "test4 is clicked", Toast.LENGTH_LONG).show();
break;
default:
break;
}
}

}

3. That's all.Run the Project Now.

Comments and doubts are encouraged.

Thank you.

Simple Button Listener

Button Event Listener

New for Android, then go step by step.

First we will learn the button click event.

First write the xml file in new project.

1.activity_main.xml

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

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <Button

        android:id="@+id/btn1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true"

        android:layout_centerVertical="true"

        android:text="test" />

</RelativeLayout>

MainActivity.java

package com.sri.buttontest;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends Activity {

Button btn;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

btn = (Button) findViewById(R.id.btn1);

btn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

Toast.makeText(getApplicationContext(), "Test is clicked",

Toast.LENGTH_LONG).show();

}

});

}

}

3.Now this is how the button listener works.

Thank you.