java.lang.OutOfMemoryError: 位图大小超出 VM 预算 [英] java.lang.OutOfMemoryError: bitmap size exceeds VM budget
问题描述
我正在尝试将应用程序的布局从纵向更改为横向，反之亦然.但是，如果我经常这样做或多次这样做，那么有时我的应用程序会崩溃.. 下面是错误日志.请建议可以做什么?
I am trying to change the layout of my application from portrait to landscape and vice-versa. But if i do it frequently or more than once then at times my application crashes.. Below is the error log. Please suggest what can be done?
01-06 09:52:27.787: ERROR/dalvikvm-heap(17473): 1550532-byte external allocation too large for this process. 01-06 09:52:27.787: ERROR/dalvikvm(17473): Out of memory: Heap Size=6471KB, Allocated=4075KB, Bitmap Size=9564KB
01-06 09:52:27.787: ERROR/(17473): VM won't let us allocate 1550532 bytes
01-06 09:52:27.798: DEBUG/skia(17473): --- decoder->decode returned false
01-06 09:52:27.798: DEBUG/AndroidRuntime(17473): Shutting down VM
01-06 09:52:27.798: WARN/dalvikvm(17473): threadid=3: thread exiting with uncaught exception (group=0x4001e390)
01-06 09:52:27.807: ERROR/AndroidRuntime(17473): Uncaught handler: thread main exiting due to uncaught exception
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): java.lang.RuntimeException: Unable to start activity ComponentInfo{}: android.view.InflateException: Binary XML file line #2: Error inflating class <unknown
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3812)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.app.ActivityThread.access$2300(ActivityThread.java:126)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1936)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.os.Handler.dispatchMessage(Handler.java:99)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.os.Looper.loop(Looper.java:123)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.app.ActivityThread.main(ActivityThread.java:4595)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at java.lang.reflect.Method.invokeNative(Native Method)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at java.lang.reflect.Method.invoke(Method.java:521)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at dalvik.system.NativeStart.main(Native Method)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class <unknown
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.view.LayoutInflater.createView(LayoutInflater.java:513)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.view.LayoutInflater.inflate(LayoutInflater.java:385)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.app.Activity.setContentView(Activity.java:1629)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at onCreate(Game.java:98)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): ... 12 more
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): Caused by: java.lang.reflect.InvocationTargetException
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.widget.LinearLayout.<init>(LinearLayout.java:92)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at java.lang.reflect.Constructor.constructNative(Native Method)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.view.LayoutInflater.createView(LayoutInflater.java:500)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): ... 22 more
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:464)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:340)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.content.res.Resources.loadDrawable(Resources.java:1705)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.content.res.TypedArray.getDrawable(TypedArray.java:548)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.view.View.<init>(View.java:1850)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.view.View.<init>(View.java:1799)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): at android.view.ViewGroup.<init>(ViewGroup.java:296)
01-06 09:52:27.857: ERROR/AndroidRuntime(17473): ... 26 more
推荐答案
我发现在开发 Android 应用程序时最常见的错误之一是
One of the most common errors that I found developing Android Apps is the
java.lang.OutOfMemoryError: Bitmap Size Exceeds VM Budget
java.lang.OutOfMemoryError: Bitmap Size Exceeds VM Budget
错误.我在更改方向后使用大量位图的活动中经常发现此错误:活动被销毁，再次创建，并且布局从 XML 中膨胀"，消耗了可用于位图的 VM 内存.
error. I found this error frequently on Activities using lots of bitmaps after changing orientation: the Activity is destroyed, created again and the layouts are "inflated" from the XML consuming the VM memory available for bitmaps.
垃圾收集器没有正确释放先前 Activity 布局上的位图，因为它们已经交叉引用了它们的 Activity.经过多次实验，我找到了一个很好的解决方案.
Bitmaps on the previous Activity layout are not properly deallocated by the garbage collector because they have crossed references to their activity. After many experiments I found a quite good solution for this problem.
首先，在 XML 布局的父视图上设置id"属性:
First, set the "id" attribute on the parent view of your XML layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/RootView">
...
然后，在您的 Activity 的 onDestroy() 方法上，调用 unbindDrawables() 方法传递对父视图的引用，然后执行一个 System.gc().
Then, on the onDestroy() method of your Activity, call the unbindDrawables() method passing a reference to the parent View and then do a System.gc().
@Override
protected void onDestroy() {
super.onDestroy();
unbindDrawables(findViewById(R.id.RootView));
System.gc();
}
private void unbindDrawables(View view) {
if (view.getBackground() != null) {
view.getBackground().setCallback(null);
}
if (view instanceof ViewGroup) {
for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
unbindDrawables(((ViewGroup) view).getChildAt(i));
}
((ViewGroup) view).removeAllViews();
}
}
这个 unbindDrawables() 方法递归地探索视图树并且:
This unbindDrawables() method explores the view tree recursively and:
- 移除所有后台可绘制对象的回调
- 删除每个视图组上的子项
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