如何修复＆QUOT;帆布：试图用一个循环位错误＆QUOT;？ [英] How to fix "canvas: trying to use a recycled bitmap error"?
问题描述
我创建一个 RecyclerView 来显示图片的网格。当选择其中之一，它应打开一个新的活动与过渡
I'm creating a RecyclerView to show a Grid of pictures. When selecting one of them, it should open a new activity with a transition.
我使用滑翔库加载的图片和过渡看起来可怕，因为它在重新加载新的活动画面。因此，我不得不将其保存在缓存中，然后将其用于过渡。
I'm using Glide library to load the pictures and the transition looks awful because it reloads the picture in the new activity. So I had to save it in cache, and then use it for the transition.
我有code，但有时如果画面不加载，它抛出一个帆布的RuntimeException。
I have the code, but sometimes if the picture doesn't load, it throws a Canvas RuntimeException.
这是日志：
07-03 15:19:58.633 28461-28461/jahirfiquitiva.project E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: jahirfiquitiva.project, PID: 28461
java.lang.RuntimeException: Canvas: trying to use a recycled bitmap android.graphics.Bitmap@29f09d20
at android.graphics.Canvas.throwIfCannotDraw(Canvas.java:1282)
at android.view.GLES20Canvas.drawBitmap(GLES20Canvas.java:599)
at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:538)
at android.widget.ImageView.onDraw(ImageView.java:1176)
at android.view.View.draw(View.java:15239)
at android.view.View.updateDisplayListIfDirty(View.java:14175)
at android.view.View.getDisplayList(View.java:14197)
at android.view.GhostView.onDraw(GhostView.java:52)
at android.view.View.draw(View.java:15239)
at android.view.View.updateDisplayListIfDirty(View.java:14175)
at android.view.View.getDisplayList(View.java:14197)
at android.view.View.draw(View.java:14967)
at android.view.ViewGroup.drawChild(ViewGroup.java:3406)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3199)
at android.view.View.updateDisplayListIfDirty(View.java:14170)
at android.view.View.getDisplayList(View.java:14197)
at android.view.View.draw(View.java:14967)
at android.view.ViewGroup.drawChild(ViewGroup.java:3406)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3199)
at android.view.ViewOverlay$OverlayViewGroup.dispatchDraw(ViewOverlay.java:219)
at android.view.View.draw(View.java:15248)
at android.widget.FrameLayout.draw(FrameLayout.java:598)
at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2906)
at android.view.View.updateDisplayListIfDirty(View.java:14175)
at android.view.View.getDisplayList(View.java:14197)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:273)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:279)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:318)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2536)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2352)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1982)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5891)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5289)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
这是code打开其他活动，并保存图片作为缓存：
This is the code to open the other activity and save the picture as cache:
private void openViewer(WallpapersAdapter.WallsHolder wallsHolder, int index, final HashMap<String, String> data) {
final Intent intent = new Intent(wallsActivity, ViewerActivity.class);
intent.putExtra("wallUrl", data.get(WallpapersActivity.WALL));
intent.putExtra("wallName", data.get(WallpapersActivity.NAME));
intent.putExtra("transitionName", ViewCompat.getTransitionName(wallsHolder.wall));
//save image from drawable
//get its path and send it to activity
Bitmap bitmap = drawableToBitmap(wallsHolder.wall.getDrawable());
//Convert to byte array and send to the other activity
Log.e("Resolution", bitmap.getWidth() + "x" + bitmap.getHeight());
try {
//Write file
String filename = "bitmap.png";
FileOutputStream stream = this.openFileOutput(filename, Context.MODE_PRIVATE);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
//Cleanup
stream.close();
bitmap.recycle();
//Pop intent
intent.putExtra("image", filename);
} catch (Exception e) {
e.printStackTrace();
}
ActivityOptionsCompat options = ActivityOptionsCompat.makeSceneTransitionAnimation(
this, wallsHolder.wall, ViewCompat.getTransitionName(wallsHolder.wall));
startActivity(intent, options.toBundle());
}
public static Bitmap drawableToBitmap (Drawable drawable) {
Bitmap bitmap = null;
if (drawable instanceof BitmapDrawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
if(bitmapDrawable.getBitmap() != null) {
return bitmapDrawable.getBitmap();
}
}
if(drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
} else {
bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
}
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
drawable.draw(canvas);
return bitmap;
}
我可以做些什么来解决这个问题？先谢谢了。
What could I do to fix this issue? Thanks in advance.
推荐答案
我怀疑过一段时间你的位图进入回收状态之前的画布得到了抽奖机会到这里 drawable.draw（画布）;
I suspect that once in a while your bitmap gets into the recycled state just before the Canvas gets a chance to draw onto it here drawable.draw(canvas);.
有一个快速的解决方案应该不叫 bitmap.recycle（）; ，这是不严格要求的安卓> 2.3.3 。如果你仍然想强行收回此内存，你必须找到一个方法来检查时对位图确实不再需要（即画布有机会完成其绘图操作）。
A quick solution should be not to call bitmap.recycle();, which is not strictly required for android >2.3.3. If you still want to reclaim this memory forcefully, you'll have to find a way to check when the bitmap is indeed no longer needed (i.e., Canvas had a chance to finish its drawing operations).
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