final String myUrlStr = newString;
    URL url;
    Uri uri=null;
    try {
        url = new URL(myUrlStr);
        uri = Uri.parse( url.toURI().toString() );
    } catch (MalformedURLException e1) {
        e1.printStackTrace();
    } catch (URISyntaxException e) {
        e.printStackTrace();
    }

    try {
        image = MediaStore.Images.Media.getBitmap(this.getContentResolver(),uri);
    } catch (IOException e) {
        e.printStackTrace();
    }
    setButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            WallpaperManager wallpaperManager=WallpaperManager.getInstance(getApplicationContext());

            try {
                // Set the image as wallpaper
                if(image!=null)
                    wallpaperManager.setBitmap(image);
                else
                    Toast.makeText(getApplicationContext(), "No image was chosen.", Toast.LENGTH_LONG).show();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }
    });