android-studio - java.lang.ClassCastException: android.graphics.drawable.TransitionDrawable 不能转换为 android.graphics.drawable.BitmapDrawable

Question

创建壁纸应用程序时出现问题。当我尝试设置壁纸时，出现以下错误。我想知道问题所在。我做错了什么？设置 setwallpaper 时出现此错误。如果有人知道这个问题的答案，请帮助我。

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


    Glide.with(getApplicationContext()).load(url).
            transition(DrawableTransitionOptions.withCrossFade()).
            apply(RequestOptions.centerCropTransform().
                    diskCacheStrategy(DiskCacheStrategy.DATA)).listener(new RequestListener<Drawable>() {
        @Override
        public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
            progressBar.setVisibility(View.GONE);
            return false;
        }

        @Override
        public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
            progressBar.setVisibility(View.GONE);
            return false;
        }
    }).into(imageView);
}

public static WallpaperManager setMainScreenWallpaper(Context context, ImageView imageView, String message) {

    Bitmap bitmap;

    WallpaperManager manager = WallpaperManager.getInstance(context);
    try {
        bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            manager.setBitmap(bitmap, null, true, WallpaperManager.FLAG_SYSTEM);
        }else {

            manager.setBitmap(bitmap);
        }

        if(message.isEmpty()){
            message = "Wallpaper set successfully";
        }
        Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
    } catch (NullPointerException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return null;

}