为什么在这个错误日志中没有引用我自己的代码？我该怎么做才能避免这样的事情发生？

Question

我在 API 29 上测试了我的应用程序，一切正常。我现在尝试在 API 27 上运行它，它甚至在加载我的启动器 activity 之前就崩溃了。抛出以下异常。通常我现在会查看日志，但它不包含任何对我自己代码的引用，所以我真的不知道是什么触发了它。此外，我的启动器 activity 甚至不包含位图，也没有绘制 canvas。有什么想法吗？

    java.lang.RuntimeException: Canvas: trying to draw too large(441000000bytes) bitmap.
    at android.view.DisplayListCanvas.throwIfCannotDraw(DisplayListCanvas.java:229)
    at android.view.RecordingCanvas.drawBitmap(RecordingCanvas.java:97)
    at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:529)
    at android.widget.ImageView.onDraw(ImageView.java:1367)
    at android.view.View.draw(View.java:19192)
    at android.view.View.updateDisplayListIfDirty(View.java:18142)
    at android.view.View.draw(View.java:18920)
    at android.view.ViewGroup.drawChild(ViewGroup.java:4236)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4022)
    at androidx.constraintlayout.widget.ConstraintLayout.dispatchDraw(ConstraintLayout.java:1975)
    at android.view.View.updateDisplayListIfDirty(View.java:18133)
    at android.view.View.draw(View.java:18920)
    at android.view.ViewGroup.drawChild(ViewGroup.java:4236)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4022)
    at android.view.View.updateDisplayListIfDirty(View.java:18133)
    at android.view.View.draw(View.java:18920)
    at android.view.ViewGroup.drawChild(ViewGroup.java:4236)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4022)
    at android.view.View.updateDisplayListIfDirty(View.java:18133)
    at android.view.View.draw(View.java:18920)
    at android.view.ViewGroup.drawChild(ViewGroup.java:4236)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4022)
    at android.view.View.updateDisplayListIfDirty(View.java:18133)
    at android.view.View.draw(View.java:18920)
    at android.view.ViewGroup.drawChild(ViewGroup.java:4236)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4022)
    at android.view.View.updateDisplayListIfDirty(View.java:18133)
    at android.view.View.draw(View.java:18920)
    at android.view.ViewGroup.drawChild(ViewGroup.java:4236)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4022)
    at android.view.View.draw(View.java:19195)
    at com.android.internal.policy.DecorView.draw(DecorView.java:788)
    at android.view.View.updateDisplayListIfDirty(View.java:18142)
    at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:669)
    at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:675)
    at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:783)
    at android.view.ViewRootImpl.draw(ViewRootImpl.java:2992)
    at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2806)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2359)
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1392)
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6752)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
    at android.view.Choreographer.doCallbacks(Choreographer.java:723)
    at android.view.Choreographer.doFrame(Choreographer.java:658)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
    at android.os.Handler.handleCallback(Handler.java:790)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6494)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

Answer 1

导致崩溃的错误是

trying to draw too large(441000000bytes) bitmap

那是 ~441MB。如果你稍微看一下堆栈跟踪，你可以看到

at android.widget.ImageView.onDraw(ImageView.java:1367)

所以它在 ImageView 某处。位图没有被压缩，它只是 width * height * bit depth 所以它可能是一个尺寸很大的图像。您应该使用适合其显示方式的尺寸。

它没有显示您的任何代码，因为这只是更新 UI 的 Android 框架，您可以从方法名称中看到它正在绘制它需要的所有视图，所以您的此时不涉及代码（除非您在那里有自定义视图）。

为什么在这个错误日志中没有引用我自己的代码？我该怎么做才能避免这样的事情发生？

Why is there no reference to my own code in this error log? What can I do to avoid something like that?

crash

android

android-emulator

kotlin