Question

它有时有效但有时不起作用任何人都可以帮助我找出问题并告诉我如何应对它们。谢谢！

错误日志：

07-07 04:07:48.583: W/dalvikvm(3030): threadid=1: thread exiting with uncaught exception (group=0xb3afeba8)
07-07 04:07:48.603: E/AndroidRuntime(3030): FATAL EXCEPTION: main
07-07 04:07:48.603: E/AndroidRuntime(3030): Process: com.example.kingdoms, PID: 3030
07-07 04:07:48.603: E/AndroidRuntime(3030): java.lang.OutOfMemoryError
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.graphics.Bitmap.nativeCreate(Native Method)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.graphics.Bitmap.createBitmap(Bitmap.java:809)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.graphics.Bitmap.createBitmap(Bitmap.java:786)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.graphics.Bitmap.createBitmap(Bitmap.java:718)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:594)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at com.example.kingdoms.war1.onCreate(war1.java:1433)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.app.Activity.performCreate(Activity.java:5231)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.app.ActivityThread.access$800(ActivityThread.java:135)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.os.Handler.dispatchMessage(Handler.java:102)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.os.Looper.loop(Looper.java:136)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at android.app.ActivityThread.main(ActivityThread.java:5017)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at java.lang.reflect.Method.invokeNative(Native Method)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at java.lang.reflect.Method.invoke(Method.java:515)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
07-07 04:07:48.603: E/AndroidRuntime(3030):     at dalvik.system.NativeStart.main(Native Method)
07-07 04:12:48.683: I/Process(3030): Sending signal. PID: 3030 SIG: 9

Answer 1

首先，必须防止OOM异常无法处理。

OOM通常导致bitmaps异常导致您的应用程序崩溃，导致应用程序崩溃。为了避免OOM您可以缩小bitmaps如果它们太大，则在将它们加载到内存之前。您可以使用BitmapFactory.Options完成此操作，并根据您的要求进行缩减。

    public static Bitmap decodeSampledBitmapFromPath(String path, int reqWidth,
                int reqHeight) {

       final BitmapFactory.Options options = new BitmapFactory.Options();
       options.inJustDecodeBounds = true;
       BitmapFactory.decodeFile(path, options);

       options.inSampleSize = calculateInSampleSize(options, reqWidth,
                reqHeight);

        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        Bitmap bmp = BitmapFactory.decodeFile(path, options);
        return bmp;
    }

    public static int calculateInSampleSize(BitmapFactory.Options options,
             int reqWidth, int reqHeight) {

        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (height > reqHeight || width > reqWidth) {
            if (width > height) {
                    inSampleSize = Math.round((float) height / (float) reqHeight);
            } else {
                    inSampleSize = Math.round((float) width / (float) reqWidth);
            }
        }
     return inSampleSize;
   }

线程退出与未捕获的异常android（OutOfMemory）

1 个答案: