毕加索的“无法绘制回收位图”异常答案

【问题标题】："Cannot draw recycled bitmaps" exception with Picasso毕加索的“无法绘制回收位图”异常
【发布时间】：2013-10-13 13:03:26
【问题描述】：

我有一个与 RemoteControlClient 交互的音乐播放器应用程序。我需要加载专辑封面图像以在锁定屏幕小部件中显示它。我尝试使用 Piccasso 来实现这一点。我写了以下代码：

private final Target artworkTarget = new Target() {
    @Override
    public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom loadedFrom) {
        remoteControlClient.editMetadata(false).putBitmap(RemoteControlClientCompat.MetadataEditorCompat.METADATA_KEY_ARTWORK,
                bitmap).apply();
    }

    @Override
    public void onBitmapFailed(Drawable drawable) {
        Log.e(Constants.LOG_TAG, "Artwork loading failed");
    }

    @Override
    public void onPrepareLoad(Drawable drawable) {
    }
};

...

private void playNextSong(int songPosition) {
    ...

    String artworkUrl = Constants.Urls.BASE_ARTWORK_URL + currentSong.getArtworkId();
    Picasso.with(this).load(artworkUrl).skipMemoryCache().into(artworkTarget);
    // Update the remote controls
    remoteControlClient.editMetadata(true)
                .putString(MediaMetadataRetriever.METADATA_KEY_ARTIST, currentSong.getArtist().getName())
                .putString(MediaMetadataRetriever.METADATA_KEY_ALBUM, currentSong.getAlbum().getName())
                .putString(MediaMetadataRetriever.METADATA_KEY_TITLE, currentSong.getName())
                .apply();

   ...
   }

但有时我会遇到异常：

    ERROR/AndroidRuntime(31121): FATAL EXCEPTION: main
    java.lang.IllegalArgumentException: Cannot draw recycled bitmaps
    at android.view.GLES20Canvas.drawBitmap(GLES20Canvas.java:772)
    at android.view.GLES20RecordingCanvas.drawBitmap(GLES20RecordingCanvas.java:105)
    at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:440)
    at com.squareup.picasso.PicassoDrawable.draw(PicassoDrawable.java:96)
    at android.widget.ImageView.onDraw(ImageView.java:1025)
    at android.view.View.draw(View.java:13944)
    at android.view.View.getDisplayList(View.java:12838)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.View.draw(View.java:13657)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3083)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2920)
    at android.view.View.getDisplayList(View.java:12833)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.View.draw(View.java:13657)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3083)
    at android.widget.ListView.drawChild(ListView.java:3331)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2920)
    at android.widget.AbsListView.dispatchDraw(AbsListView.java:2357)
    at android.widget.ListView.dispatchDraw(ListView.java:3326)
    at android.view.View.draw(View.java:13947)
    at android.widget.AbsListView.draw(AbsListView.java:3693)
    at android.view.View.getDisplayList(View.java:12838)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.View.draw(View.java:13657)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3083)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2920)
    at android.view.View.getDisplayList(View.java:12833)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.View.draw(View.java:13657)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3083)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2920)
    at android.view.View.getDisplayList(View.java:12833)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3057)
    at android.view.View.getDisplayList(View.java:12775)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3057)
    at android.view.View.getDisplayList(View.java:12775)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3057)
    at android.view.View.getDisplayList(View.java:12775)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3057)
    at android.view.View.getDisplayList(View.java:12775)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3057)
    at android.view.View.getDisplayList(View.java:12775)
    at android.view.View.getDisplayList(View.java:12880)
    at android.view.HardwareRenderer$GlRenderer.buildDisplayList(HardwareRenderer.java:1411)
    at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1359)
    at android.view.ViewRootImpl.draw(ViewRootImpl.java:2367)
    at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2239)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1872)
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
    at android.view.Choreographer.doCallbacks(Choreographer.java:562)
    at android.view.Choreographer.doFrame(Choreographer.java:532)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
    at android.os.Handler.handleCallback(Handler.java:730)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:

我尝试在我的服务中保存加载的位图参考，但没有帮助。
有人知道我的代码有什么问题吗？
提前致谢。

【问题讨论】：

标签： android bitmap picasso

【解决方案1】：

我猜您使用的是 Android 4.3 或更高版本的设备。从 4.3 开始的 RemoteControlClient 实现在某些条件下对艺术品进行回收。见

http://androidxref.com/4.3_r2.1/xref/frameworks/base/media/java/android/media/RemoteControlClient.java#556

如果 Build.VERSION.SDK_INT >= 18，您基本上必须复制位图。

【讨论】：

我遇到了完全相同的问题。但是我不明白你的复制是什么意思。我有一个加载毕加索图像的列表视图，当我进入一个新活动并按返回键时，我的应用程序因上述错误而崩溃。
通过复制，我的意思是位图 destBitmap = srcBitmap.copy(srcBitmap.config, false);并使用 destBitmap 作为 RemoteControlClient 的参数。

【解决方案2】：

在您的onDestory() 或onDestroyView() 回调中尝试调用Picasso.with(Context).cancelRequest(Target);

感谢这里的人：https://github.com/square/picasso/issues/38

【讨论】：

我认为这种情况下的相关部分是使用对目标的硬引用而不是匿名实例。他正在使用硬引用，所以也许就像您说的那样，他只需取消请求即可防止 GC。不确定。

【解决方案3】：

对我来说，解决方案是为现有的 RemoteControlClient 调用 unregisterRemoteControlClient，并在每次播放新歌曲时创建一个新的。当用户尝试使用相同的封面图片播放两次相同的歌曲时会产生问题。

解决问题的sn-p是：

if(mRemoteControlClientCompat!=null){
    RemoteControlHelper.unregisterRemoteControlClient(mAudioManager, mRemoteControlClientCompat);
}

Intent intent = new Intent(Intent.ACTION_MEDIA_BUTTON);
intent.setComponent(mMediaButtonReceiverComponent);
mRemoteControlClientCompat = new RemoteControlClientCompat(PendingIntent.getBroadcast(PlayerService.this, 0, intent, 0));
RemoteControlHelper.registerRemoteControlClient(mAudioManager, mRemoteControlClientCompat);

【讨论】：

【解决方案4】：

只需尝试在单独的线程中运行您的代码，它就会起作用

 new Handler().post(new Runnable() {
                          @Override
                          public void run() {
                             /// here is your code
                              bitmap_user=transform(bitmap);
                              imageButton.setImageBitmap(bitmap_user);

                          }
                      });

【讨论】：