Library Guide

Set wallpaper using resource inside APK

Set wallpaper using resource inside APK

This example modify from the post "Restore default build-in wallpaper", to add function to set wallpaper using resource inside APK.


Create /res/raw/ folder in your Android Studio project. Refer: Android Studio error: Expected resource of type raw

Modify layout/activity_main.xml to add button to "Load Wallpaper from from Resources".

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
 
 android_layout_width="match_parent"
 android_layout_height="match_parent"
 android_padding="16dp"
 android_orientation="vertical"
 tools_context="com.blogspot.android_er.androidwallpaper.MainActivity">

 <TextView
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_layout_gravity="center_horizontal"
 android_autoLink="web"
 android_text="http://android-er.blogspot.com/"
 android_textStyle="bold" />
 <Button
 android_id="@+id/displaywp"
 android_layout_width="match_parent"
 android_layout_height="wrap_content"
 android_text="Display Wallpaper"/>
 <Button
 android_id="@+id/loadwp"
 android_layout_width="match_parent"
 android_layout_height="wrap_content"
 android_text="Load Wallpaper from Gallery"/>
 <Button
 android_id="@+id/loadwpres"
 android_layout_width="match_parent"
 android_layout_height="wrap_content"
 android_text="Load Wallpaper from from Resources"/>
 <Button
 android_id="@+id/restorewp"
 android_layout_width="match_parent"
 android_layout_height="wrap_content"
 android_text="Restore default Wallpaper"/>
 <ImageView
 android_id="@+id/image"
 android_layout_width="match_parent"
 android_layout_height="match_parent" />
</LinearLayout>

MainActivity.java

package com.blogspot.android_er.androidwallpaper;

import android.app.Activity;
import android.app.WallpaperManager;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.FileNotFoundException;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {

 ImageView imageWallpaper;
 Button btnLoadWallpaper, btnDisplayWallpaper, btnRestoreWallpaper;
 Button btnLoadWallpaperRes;

 private static final int RQS_OPEN_IMAGE = 1;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 imageWallpaper = (ImageView)findViewById(R.id.image);

 btnDisplayWallpaper = (Button)findViewById(R.id.displaywp);
 btnDisplayWallpaper.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 displayWallpaper();
 }
 });

 btnLoadWallpaper = (Button)findViewById(R.id.loadwp);
 btnLoadWallpaper.setOnClickListener(btnLoadWallpaperOnClickListener);

 btnRestoreWallpaper = (Button)findViewById(R.id.restorewp);
 btnRestoreWallpaper.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 WallpaperManager myWallpaperManager =
 WallpaperManager.getInstance(getApplicationContext());
 try {
 myWallpaperManager.clear();
 } catch (IOException e) {
 e.printStackTrace();
 }
 }
 });

 btnLoadWallpaperRes = (Button)findViewById(R.id.loadwpres);
 btnLoadWallpaperRes.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 WallpaperManager myWallpaperManager =
 WallpaperManager.getInstance(getApplicationContext());
 try {
 myWallpaperManager.setResource(R.raw.androidstudio);
 } catch (IOException e) {
 e.printStackTrace();
 }

 }
 });

 displayWallpaper();

 }

 View.OnClickListener btnLoadWallpaperOnClickListener = new View.OnClickListener() {

 @Override
 public void onClick(View v) {
 Intent intent = new Intent();

 if (Build.VERSION.SDK_INT >=
 Build.VERSION_CODES.KITKAT) {
 intent.setAction(Intent.ACTION_OPEN_DOCUMENT);
 } else {
 intent.setAction(Intent.ACTION_GET_CONTENT);
 }

 intent.addCategory(Intent.CATEGORY_OPENABLE);

 // set MIME type for image
 intent.setType("image/*");

 startActivityForResult(intent, RQS_OPEN_IMAGE);
 }
 };

 private void displayWallpaper(){
 WallpaperManager myWallpaperManager =
 WallpaperManager.getInstance(getApplicationContext());
 Drawable drawableWallpaper = myWallpaperManager.getDrawable();
 imageWallpaper.setImageDrawable(drawableWallpaper);

 Toast.makeText(this,
 drawableWallpaper.getMinimumWidth() + " x " + drawableWallpaper.getMinimumHeight()
 + " " +
 drawableWallpaper.getIntrinsicWidth() + " x " + drawableWallpaper.getIntrinsicHeight(),
 Toast.LENGTH_LONG).show();
 }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 if (resultCode == Activity.RESULT_OK) {
 if (requestCode == RQS_OPEN_IMAGE) {
 Uri dataUri = data.getData();
 Uri wallpaperUri = dataUri;
 Toast.makeText(this, wallpaperUri.toString(), Toast.LENGTH_LONG).show();

 Bitmap newOriginalBM= loadBitmap(dataUri);
 reloadWallpaper(newOriginalBM);
 }
 }
 }

 private Bitmap loadBitmap(Uri src) {

 Bitmap bm = null;

 try {
 bm = BitmapFactory.decodeStream(
 getBaseContext().getContentResolver().openInputStream(src));
 } catch (FileNotFoundException e) {
 e.printStackTrace();
 }

 return bm;
 }

 private void reloadWallpaper(Bitmap bm){
 if(bm != null){
 WallpaperManager myWallpaperManager =
 WallpaperManager.getInstance(getApplicationContext());

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
 if(myWallpaperManager.isWallpaperSupported()){
 try {
 myWallpaperManager.setBitmap(bm);
 } catch (IOException e) {
 e.printStackTrace();
 }
 }else{
 Toast.makeText(MainActivity.this,
 "isWallpaperSupported() NOT SUPPORTED",
 Toast.LENGTH_LONG).show();
 }
 }else{
 try {
 myWallpaperManager.setBitmap(bm);
 } catch (IOException e) {
 e.printStackTrace();
 }
 }
 }else{
 Toast.makeText(MainActivity.this, "bm == null", Toast.LENGTH_LONG).show();
 }
 }
}

uses-permission of "android.permission.SET_WALLPAPER" is needed.

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