有时会发生 - 的OutOfMemoryError

Question

可能重复：
Android: Strange out of memory issue while loading an image to a Bitmap object

我创建一个游戏。它的工作原理非常完美，但有时会抛出如下信息：Out of memory on a 1024016-byte allocation！我不明白为什么不能分配1MB的内存呢？我正在使用BitmapFactory.decodeResource(res, id)函数。如果位图变得无用，我立即回收它！我甚至减少了位图的大小！如果有人知道如何解决这个问题，我会感激！下面的logcat：

10-11 09:56:28.312 I/dalvikvm(13613): "main" prio=5 tid=1 RUNNABLE 
10-11 09:56:28.312 I/dalvikvm(13613): | group="main" sCount=0 dsCount=0 obj=0x40a32460 self=0x18e5828 
10-11 09:56:28.312 I/dalvikvm(13613): | sysTid=13613 nice=0 sched=0/0 cgrp=default handle=1075090664 
10-11 09:56:28.312 I/dalvikvm(13613): | schedstat=(0 0 0) utm=788 stm=85 core=0 
10-11 09:56:28.320 I/dalvikvm(13613): at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:483) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:351) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:374) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:404) 
10-11 09:56:28.320 I/dalvikvm(13613): at mygames.airdefense.extensions.FunctionalHelper.getBmpFromRes(FunctionalHelper.java:30) 
10-11 09:56:28.320 I/dalvikvm(13613): at mygames.airdefense.weathereffect.Wind.<init>(Wind.java:37) 
10-11 09:56:28.320 I/dalvikvm(13613): at mygames.airdefense.game.GameEngineMultiPlayer.InitObjects(GameEngineMultiPlayer.java:268) 
10-11 09:56:28.320 I/dalvikvm(13613): at mygames.airdefense.game.GameEngineMultiPlayer.<init>(GameEngineMultiPlayer.java:170) 
10-11 09:56:28.320 I/dalvikvm(13613): at mygames.airdefense.game.GameActivity.onCreate(GameActivity.java:189) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.app.Activity.performCreate(Activity.java:4465) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3351) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.app.ActivityThread.access$700(ActivityThread.java:123) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1151) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.os.Handler.dispatchMessage(Handler.java:99) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.os.Looper.loop(Looper.java:137) 
10-11 09:56:28.320 I/dalvikvm(13613): at android.app.ActivityThread.main(ActivityThread.java:4424) 
10-11 09:56:28.320 I/dalvikvm(13613): at java.lang.reflect.Method.invokeNative(Native Method) 
10-11 09:56:28.320 I/dalvikvm(13613): at java.lang.reflect.Method.invoke(Method.java:511) 
10-11 09:56:28.320 I/dalvikvm(13613): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
10-11 09:56:28.320 I/dalvikvm(13613): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
10-11 09:56:28.320 I/dalvikvm(13613): at dalvik.system.NativeStart.main(Native Method) 
10-11 09:56:28.320 I/dalvikvm(13613): 
10-11 09:56:28.328 D/skia (13613): --- decoder->decode returned false 
10-11 09:56:28.335 D/AndroidRuntime(13613): Shutting down VM 
10-11 09:56:28.335 W/dalvikvm(13613): threadid=1: thread exiting with uncaught exception (group=0x40a311f8) 
10-11 09:56:28.351 E/AndroidRuntime(13613): FATAL EXCEPTION: main 
10-11 09:56:28.351 E/AndroidRuntime(13613): java.lang.OutOfMemoryError 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:483) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:351) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:374) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:404) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at mygames.airdefense.extensions.FunctionalHelper.getBmpFromRes(FunctionalHelper.java:30) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at mygames.airdefense.weathereffect.Wind.<init>(Wind.java:37) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at mygames.airdefense.game.GameEngineMultiPlayer.InitObjects(GameEngineMultiPlayer.java:268) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at mygames.airdefense.game.GameEngineMultiPlayer.<init>(GameEngineMultiPlayer.java:170) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at mygames.airdefense.game.GameActivity.onCreate(GameActivity.java:189) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.app.Activity.performCreate(Activity.java:4465) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3351) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.app.ActivityThread.access$700(ActivityThread.java:123) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1151) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.os.Looper.loop(Looper.java:137) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at android.app.ActivityThread.main(ActivityThread.java:4424) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at java.lang.reflect.Method.invoke(Method.java:511) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
10-11 09:56:28.351 E/AndroidRuntime(13613):  at dalvik.system.NativeStart.main(Native Method) 
10-11 09:56:28.367 W/ActivityManager( 185): Force finishing activity mygames.airdefense/.game.GameActivity 

Answer 1

public static Bitmap getBmpFromRes(Resources res, int id){ 
    BitmapFactory.Options options = new BitmapFactory.Options(); 
    options.inSampleSize = 1; // sample size value depends upon your image so you have to    calculate it on run time. 
    options.inPurgeable = true; //IMP 
    return BitmapFactory.decodeResource(res, id,options); }