How to load image from Picasso library and set it as wallpaper

Question

I received a picture from the Internet with the Picasso Library. Then I set it up on the wallpaper. But after running on my mobile, I approached the Force close. Please help me if you make a mistake in coding or please offer if suggested for work.

  Bitmap result= null;
    try {
        result = Picasso.with(getApplicationContext())
                .load("http://wallpaperswide.com/download/the_amazing_spider_man_2012_film-wallpaper-1600x900.jpg")
                .get();
    } catch (IOException e) {
        e.printStackTrace();
    }

    WallpaperManager wallpaperManager = WallpaperManager.getInstance(getApplicationContext());
    try {
        wallpaperManager.setBitmap(result);
    } catch (IOException ex) {
        ex.printStackTrace();
    }

Answer 1

Suppose that you are inside MainActivity:

package com.example.myapplication;

import android.app.WallpaperManager;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;

import com.squareup.picasso.Picasso;
import com.squareup.picasso.Target;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

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

        Picasso.with(this).load("http://wallpaperswide.com/download/the_amazing_spider_man_2012_film-wallpaper-1600x900.jpg").into(new Target(){

            @Override
            public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
                WallpaperManager wallpaperManager = WallpaperManager.getInstance(MainActivity.this);
                try {
                    wallpaperManager.setBitmap(bitmap);
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
                Log.d("TAG", "onBitmapLoaded: ");
                Toast.makeText(MainActivity.this, "Wallpaper Changed", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onBitmapFailed(final Drawable errorDrawable) {
                Log.d("TAG", "FAILED");
                Toast.makeText(MainActivity.this, "Loading image failed", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onPrepareLoad(final Drawable placeHolderDrawable) {
                Log.d("TAG", "Prepare Load");
                Toast.makeText(MainActivity.this, "Downloading image", Toast.LENGTH_SHORT).show();
            }
        });

    }

}

Make sure:

• you use this import import com.squareup.picasso.Target; instead of import java.lang.annotation.Target;
• you give INTERNET permission and SET_WALLPAPER permission in your AndroidManifest.xml. <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.SET_WALLPAPER" />

Lastly: wait for the image to download then check your device home screen and voila!!!