This example explains how to set wallpaper programmatically for home screen in android.
Algorithm:
1.) Create a new project by File-> New -> Android Project name it WallpaperExample.
2.) Write following into main.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageview" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="match_parent">
<Button
android:id="@+id/randomize"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Randomize"
android:layout_gravity="bottom" />
<Button
android:id="@+id/setwallpaper"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Set as Wallpaper"
android:layout_gravity="bottom" />
</LinearLayout>
</FrameLayout>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageview" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="match_parent">
<Button
android:id="@+id/randomize"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Randomize"
android:layout_gravity="bottom" />
<Button
android:id="@+id/setwallpaper"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Set as Wallpaper"
android:layout_gravity="bottom" />
</LinearLayout>
</FrameLayout>
3.) Set following permission to you manifest file:
<uses-permission android:name="android.permission.SET_WALLPAPER" />
4.) Run for output.
Steps:
1.) Create a project named WallpaperExample and set the information as stated in the image.
Build Target: Android 4.0
Application Name: WallpaperExample
Package Name: com. example. WallpaperExample
Activity Name: WallpaperExample
Min SDK Version: 14
Application Name: WallpaperExample
Package Name: com. example. WallpaperExample
Activity Name: WallpaperExample
Min SDK Version: 14
2.) Open WallpaperExample.java file and write following code there:
package com.example.WallpaperExample;
import java.io.IOException;
import android.app.Activity;
import android.app.WallpaperManager;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.app.WallpaperManager;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
public class WallpaperExample extends Activity {
final static private int[] mColors =
{Color.BLUE, Color.GREEN, Color.RED, Color.LTGRAY, Color.MAGENTA,Color.CYAN,
Color.YELLOW, Color.WHITE};
@Override
protected void onCreate(Bundle savedInstanceState) {
// Be sure to call the super class.
super.onCreate(savedInstanceState);
// See res/layout/wallpaper_2.xml for this
// view layout definition, which is being set here as
// the content of our screen.
setContentView(R.layout.main);
final WallpaperManager wallpaperManager =WallpaperManager.getInstance(this);
final Drawable wallpaperDrawable =wallpaperManager.getDrawable();
final ImageView imageView = (ImageView)findViewById(R.id.imageview);
imageView.setDrawingCacheEnabled(true);
imageView.setImageDrawable(wallpaperDrawable);
final static private int[] mColors =
{Color.BLUE, Color.GREEN, Color.RED, Color.LTGRAY, Color.MAGENTA,Color.CYAN,
Color.YELLOW, Color.WHITE};
@Override
protected void onCreate(Bundle savedInstanceState) {
// Be sure to call the super class.
super.onCreate(savedInstanceState);
// See res/layout/wallpaper_2.xml for this
// view layout definition, which is being set here as
// the content of our screen.
setContentView(R.layout.main);
final WallpaperManager wallpaperManager =WallpaperManager.getInstance(this);
final Drawable wallpaperDrawable =wallpaperManager.getDrawable();
final ImageView imageView = (ImageView)findViewById(R.id.imageview);
imageView.setDrawingCacheEnabled(true);
imageView.setImageDrawable(wallpaperDrawable);
Button randomize = (Button) findViewById(R.id.randomize);
randomize.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
int mColor = (int) Math.floor(Math.random() *mColors.length);
wallpaperDrawable.setColorFilter(mColors[mColor], PorterDuff.Mode.MULTIPLY);
imageView.setImageDrawable(wallpaperDrawable);
imageView.invalidate();
}
});
randomize.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
int mColor = (int) Math.floor(Math.random() *mColors.length);
wallpaperDrawable.setColorFilter(mColors[mColor], PorterDuff.Mode.MULTIPLY);
imageView.setImageDrawable(wallpaperDrawable);
imageView.invalidate();
}
});
Button setWallpaper = (Button) findViewById(R.id.setwallpaper);
setWallpaper.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
try {
wallpaperManager.setBitmap(imageView.getDrawingCache());
finish();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
setWallpaper.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
try {
wallpaperManager.setBitmap(imageView.getDrawingCache());
finish();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
3.) Compile and build the project.
Output
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