Question

我的应用程序在nougat模拟器和许多设备上工作得非常好，但我在Google Play崩溃记者中发现了这个例外，我不知道为什么会发生这种情况，只有nougat设备才会出现例外情况。

例外：

   java.lang.RuntimeException: 
  at android.view.DisplayListCanvas.throwIfCannotDraw(DisplayListCanvas.java:260)
  at android.graphics.Canvas.drawBitmap(Canvas.java:1420)
  at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:545)
  at android.view.View.getDrawableRenderNode(View.java:18591)
  at android.view.View.drawBackground(View.java:18527)
  at android.view.View.draw(View.java:18315)
  at android.view.View.updateDisplayListIfDirty(View.java:17302)
  at android.view.View.draw(View.java:18086)
  at android.view.ViewGroup.drawChild(ViewGroup.java:3966)
  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3752)
  at android.view.View.updateDisplayListIfDirty(View.java:17297)
  at android.view.View.draw(View.java:18086)
  at android.view.ViewGroup.drawChild(ViewGroup.java:3966)
  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3752)
  at android.view.View.updateDisplayListIfDirty(View.java:17297)
  at android.view.View.draw(View.java:18086)
  at android.view.ViewGroup.drawChild(ViewGroup.java:3966)
  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3752)
  at android.view.View.updateDisplayListIfDirty(View.java:17297)
  at android.view.View.draw(View.java:18086)
  at android.view.ViewGroup.drawChild(ViewGroup.java:3966)
  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3752)
  at android.view.View.updateDisplayListIfDirty(View.java:17297)
  at android.view.View.draw(View.java:18086)
  at android.view.ViewGroup.drawChild(ViewGroup.java:3966)
  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3752)
  at android.view.View.draw(View.java:18327)
  at com.android.internal.policy.DecorView.draw(DecorView.java:919)
  at android.view.View.updateDisplayListIfDirty(View.java:17302)
  at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:692)
  at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:698)
  at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:806)
  at android.view.ViewRootImpl.draw(ViewRootImpl.java:3135)
  at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2931)
  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2523)
  at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1522)
  at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7098)
  at android.view.Choreographer$CallbackRecord.run(Choreographer.java:927)
  at android.view.Choreographer.doCallbacks(Choreographer.java:702)
  at android.view.Choreographer.doFrame(Choreographer.java:638)
  at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:913)
  at android.os.Handler.handleCallback(Handler.java:751)
  at android.os.Handler.dispatchMessage(Handler.java:95)
  at android.os.Looper.loop(Looper.java:154)
  at android.app.ActivityThread.main(ActivityThread.java:6682)
  at java.lang.reflect.Method.invoke(Native Method:0)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)

这个错误可能是什么？

注意：我使用的所有drawable都小于 1MB 。

Answer 1

我在WebView.CanRefresh上遇到了完全相同的问题。在我的情况下，初始屏幕具有高分辨率，并且错误地将其放置在可绘制的文件夹中。我从this答案中找到了解决方法。

右键单击Samsung Galaxy S6 S7 S8-> drawable-> New。
输入新的目录名称：Directory。如果转到xxhdpi

drawable-xxhdpi

将启动画面从res移到drawable。

Answer 2

尝试在android.view.DisplayListCanvas.throwIfCannotDraw中设置调试点，并检查哪个图像引发异常。其中一些是不正确的 - 大尺寸或你有太多的图像，例如，无法记录到画布池。

Answer 3

仅在我的情况下调整图像大小，我的启动屏幕图像尺寸为1544x2100，所以我更改为1080x2100，这样就可以了！希望这会有所帮助！！！谢谢!!!

Answer 4

 private static final int MAX_BITMAP_SIZE = 100 * 1024 * 1024; // 100 MB

    @Override
    protected void throwIfCannotDraw(Bitmap bitmap) {
        super.throwIfCannotDraw(bitmap);
        int bitmapSize = bitmap.getByteCount();
        if (bitmapSize > MAX_BITMAP_SIZE) {
            throw new RuntimeException(
                    "Canvas: trying to draw too large(" + bitmapSize + "bytes) bitmap.");
        }
    }

在 DisplayListCanvas 中查看此代码，否则请查看View＃draw（）方法

boolean draw(Canvas canvas, ViewGroup parent, long drawingTime) {
    boolean drawingWithRenderNode = mAttachInfo != null
                && mAttachInfo.mHardwareAccelerated
                && hardwareAcceleratedCanvas;
    ···
    if (drawingWithRenderNode) {
        // Delay getting the display list until animation-driven alpha values are
        // set up and possibly passed on to the view
        renderNode = updateDisplayListIfDirty();
        if (!renderNode.isValid()) {
            // Uncommon, but possible. If a view is removed from the hierarchy during the call
            // to getDisplayList(), the display list will be marked invalid and we should not
            // try to use it again.
            renderNode = null;
            drawingWithRenderNode = false;
            }
        }
    ···
}

为什么我们可以通过取消hardwareAccelerated来解决问题

错误：DisplayListCanvas.throwIfCannotDraw上的RuntimeException

4 个答案: