在我的应用程序中，我需要处理大的位图。加载位图后，我想在我的imageview中显示它
try {
bitmap = GlideBitmapFactory.decodeFile(photoPath);
} catch (OutOfMemoryError) {
//i do stuff in order to load bitmap
}
我的问题是我无法使用以下尝试捕获来捕获java.lang.RuntimeException。
try {
ImageView i = (ImageView) findViewById(R.id.mainImageView);
i.setImageBitmap(bitmap);
} catch (Exception e) {
//never came here
}
Logcat：
java.lang.RuntimeException: Canvas: trying to draw too large(116640000bytes) bitmap.
at android.view.DisplayListCanvas.throwIfCannotDraw(DisplayListCanvas.java:260)
at android.graphics.Canvas.drawBitmap(Canvas.java:1415)
at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:528)
at android.widget.ImageView.onDraw(ImageView.java:1316)
at android.view.View.draw(View.java:17214)
at android.view.View.updateDisplayListIfDirty(View.java:16196)
at android.view.View.draw(View.java:16980)
at android.view.ViewGroup.drawChild(ViewGroup.java:3729)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3515)
at android.view.View.updateDisplayListIfDirty(View.java:16191)
at android.view.View.draw(View.java:16980)
at android.view.ViewGroup.drawChild(ViewGroup.java:3729)
at android.support.design.widget.CoordinatorLayout.drawChild(CoordinatorLayout.java:1254)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3515)
at android.view.View.updateDisplayListIfDirty(View.java:16191)
at android.view.View.draw(View.java:16980)
at android.view.ViewGroup.drawChild(ViewGroup.java:3729)
at android.support.v4.widget.DrawerLayout.drawChild(DrawerLayout.java:1366)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3515)
at android.view.View.draw(View.java:17217)
at android.view.View.updateDisplayListIfDirty(View.java:16196)
at android.view.View.draw(View.java:16980)
at android.view.ViewGroup.drawChild(ViewGroup.java:3729)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3515)
at android.view.View.updateDisplayListIfDirty(View.java:16191)
at android.view.View.draw(View.java:16980)
at android.view.ViewGroup.drawChild(ViewGroup.java:3729)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3515)
at android.view.View.updateDisplayListIfDirty(View.java:16191)
at android.view.View.draw(View.java:16980)
at android.view.ViewGroup.drawChild(ViewGroup.java:3729)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3515)
at android.view.View.updateDisplayListIfDirty(View.java:16191)
at android.view.View.draw(View.java:16980)
at android.view.ViewGroup.drawChild(ViewGroup.java:3729)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3515)
at android.view.View.updateDisplayListIfDirty(View.java:16191)
at android.view.View.draw(View.java:16980)
at android.view.ViewGroup.drawChild(ViewGroup.java:3729)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3515)
at android.view.View.draw(View.java:17217)
at com.android.internal.policy.DecorView.draw(DecorView.java:757)
at android.view.View.updateDisplayListIfDirty(View.java:16196)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:648)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:654)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:762)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2837)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2645)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2252)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1291)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6396)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:876)
at android.view.Choreographer.doCallbacks(Choreographer.java:688)
at android.view.Choreographer.doFrame(Choreographer.java:623)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:862)
at android.os.Handler.handleCallback(Handler.java:754)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:163)
at android.app.ActivityThread.main(ActivityThread.java:6228)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
我知道Exception应该抓住RuntimeException。那是怎么回事？
答案 0 :(得分：1)
我相信是因为这个原因。
调用setImageBitmap()时，Android将该位图转换为Drawable，然后内部调用setImageDrawable()。
setImageDrawable()基本上只是更新全局变量（mDrawable），然后使ImageView无效。这意味着您不再直接连接到设置图像的过程，因为它似乎通过了Handler调用，因此您不再能够捕获引发的任何异常。
您真的应该在设置位图之前先缩放位图，而不要依赖它会引发异常的事实。
答案 1 :(得分：0)
我认为您不是此代码抛出的catching exception。 GlideBitmapFactory.decodeFile(photoPath)。它正在抛出runtime exception。建议将OutOfMemoryError替换为runtime exception。使用decodeFile(photoPath, 100, 100)对需要第二个和第三个参数width和height的位图进行下采样。</ p>
答案 2 :(得分：-1)
您的异常中没有任何代码，这可能是可能的原因。
RuntimeException扩展了Exception。如果捕获到Exception，则也会捕获RuntimeException。