Styjun

I am new to android. I want to set a wallpaper from the imageview which is retrieved from the firebase. I made a download and set button. The download button works great. The set button doesn't work. I have seen answers on Stackoverflow but they are full of built-in drawable wallpapers. so how to set the wallpaper from the imageview where the image is retrieved from the firebase

Here's the Code:

public class ViewWallActivity extends AppCompatActivity 
 CollapsingToolbarLayout collapsingToolbarLayout;
 Button download;
 Button buttonSetWallpaper;
 ImageView i1;


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

 final Target target = new Target() 
 @Override
 public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) 

 

 @Override
 public void onBitmapFailed(Exception e, Drawable errorDrawable) 

 

 @Override
 public void onPrepareLoad(Drawable placeHolderDrawable) 

 
 ;

 initialize();

 Picasso.get().load(Utils.selected_wallpaper.getImageLink()).into(i1);


 buttonSetWallpaper.setOnClickListener(new Button.OnClickListener() 
 @Override
 public void onClick(View arg0) 
 Picasso.get().load(Utils.selected_wallpaper.getImageLink()).into(target);

 
 );

 download.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View v) 

 if(ContextCompat.checkSelfPermission(ViewWallActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)==PackageManager.PERMISSION_GRANTED)
 
 String filename = UUID.randomUUID().toString() + ".png";

 AlertDialog.Builder b = new AlertDialog.Builder(ViewWallActivity.this);
 b.setMessage("Downloading....");
 AlertDialog alertDialog =b.create();
 alertDialog.show();

 Picasso.get().load(Utils.selected_wallpaper.getImageLink()).into(new SaveImageHelper(getBaseContext(),alertDialog,getApplicationContext().getContentResolver(),filename,"Mini Image"));


 
 else
 ActivityCompat.requestPermissions(ViewWallActivity.this, new String[]Manifest.permission.WRITE_EXTERNAL_STORAGE,9);



 
 );
 
 private void initialize()
 
 i1 = (ImageView)findViewById(R.id.thumbImage);

 collapsingToolbarLayout = (CollapsingToolbarLayout)findViewById(R.id.collapsingToolbarLayout);
 //fabDownload = (FloatingActionButton)findViewById(R.id.fab_download);
 download = (Button)findViewById(R.id.btn) ;
 buttonSetWallpaper = (Button)findViewById(R.id.wallbtn);
 //fabWallpaper = (FloatingActionButton)findViewById(R.id.fab_wallpaper);

 collapsingToolbarLayout.setTitle(Utils.CATEGORY_SELECTED);