Android OutOfMemoryError:？

Question

我偶尔会OutOfMemoryError: (Heap Size=49187KB, Allocated=41957KB)在我的一个应用程序中获得一个.我该怎么做才能诊断出来？

  01-09 10:32:02.079: E/dalvikvm(8077): Out of memory: Heap Size=49187KB, Allocated=41957KB, Limit=49152KB
  01-09 10:32:02.079: E/dalvikvm(8077): Extra info: Footprint=48611KB, Allowed Footprint=49187KB, Trimmed=7852KB
  01-09 10:32:02.079: D/skia(8077): --- decoder->decode returned false
  01-09 10:32:02.079: D/AndroidRuntime(8077): Shutting down VM
  01-09 10:32:02.079: W/dalvikvm(8077): threadid=1: thread exiting with uncaught exception (group=0x40a97228)
  01-09 10:32:02.079: E/AndroidRuntime(8077): FATAL EXCEPTION: main
  01-09 10:32:02.079: E/AndroidRuntime(8077): java.lang.OutOfMemoryError: (Heap Size=49187KB, Allocated=41957KB)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:486)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:773)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.content.res.Resources.loadDrawable(Resources.java:2044)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.content.res.Resources.getDrawable(Resources.java:675)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.view.View.setBackgroundResource(View.java:11776)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at com.blsk.bigtoss.ImageLoader.DisplayImage(ImageLoader.java:81)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at com.blsk.bigtoss.MatchActivity$MatchAsyncTask.onPostExecute(MatchActivity.java:1768)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.os.AsyncTask.finish(AsyncTask.java:602)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.os.AsyncTask.access$600(AsyncTask.java:156)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.os.Handler.dispatchMessage(Handler.java:99)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.os.Looper.loop(Looper.java:156)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at android.app.ActivityThread.main(ActivityThread.java:4987)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at java.lang.reflect.Method.invokeNative(Native Method)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at java.lang.reflect.Method.invoke(Method.java:511)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
  01-09 10:32:02.079: E/AndroidRuntime(8077):   at dalvik.system.NativeStart.main(Native Method)
  01-09 10:32:02.099: E/EmbeddedLogger(1612): App crashed! Process: com.blsk.bigtoss
  01-09 10:32:02.099: E/EmbeddedLogger(1612): App crashed! Package: com.blsk.bigtoss v6 (1.2)
  01-09 10:32:02.129: E/EmbeddedLogger(1612): Application Label: Cricket

这就是它发生的路线:

LinearLayout resultMatchHeaderContainer = new LinearLayout(activity); 

if (!resultImagePath.equals("")) {   
    imageLoader.DisplayImage(resultImagePath,resultMatchHeaderContainer, -1,modifiedHeight, R.drawable.matches_placeholder_result2x);
} else {
    try {
        resultMatchHeaderContainer.setBackgroundResource(R.drawable.matches_placeholder_result2x); 
    } catch (OutOfMemoryError e) {         
        e.printStackTrace();
    }
}

Answer 1

也许这对你有帮助吗？

添加清单

android> v3

<application
    ....
       android:largeHeap="true"> 

Answer 2

常见修复:

1.修复你的背景:

尝试使用适当的上下文:例如,因为Toast可以在许多活动中看到而不是仅在一个活动中使用,getApplicationContext()用于祝酒,并且即使活动已经结束,服务也可以继续运行,因此启动服务:

Intent myService = new Intent(getApplicationContext(), MyService.class)

使用此表作为适当的上下文的快速指南:

关于上下文的原始文章.

2.检查您是否真正完成了服务.

例如,我有一个使用谷歌位置服务API的intentService.我忘了打电话googleApiClient.disconnect();:

//Disconnect from API onDestroy()
    if (googleApiClient.isConnected()) {
        LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, GoogleLocationService.this);
        googleApiClient.disconnect();
    }

3.检查图像和位图的用法:

如果你正在使用square的库Picasso,我发现我没有使用它来泄漏内存.fit(),这大大减少了我的内存占用,从平均50MB到小于19MB:

Picasso.with(ActivityExample.this)                   //Activity context
                .load(object.getImageUrl())           
                .fit()                                //This avoided the OutOfMemoryError
                .centerCrop()                         //makes image to not stretch
                .into(imageView);

4.如果您使用广播接收器,请取消注册.

5.如果您正在使用java.util.Observer(观察者模式):

一定要使用 deleteObserver(observer);

Answer 3

您可以执行以下操作以避免此问题.

Drawable drawable = resultMatchHeaderContainer.getDrawable();

if (drawable instanceof BitmapDrawable) {
    BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
    if (bitmapDrawable != null) {
        Bitmap bitmap = bitmapDrawable.getBitmap();

        if (bitmap != null && !bitmap.isRecycled())
           bitmap.recycle();
    }
}

在Imageview中加载位图一直是内存不足问题的原因,这是非常常见的,所以我们必须非常小心地处理imageview和位图.您可以做的是在将任何背景位图设置到您的imageview时,首先获取drawable并将其重新循环,以便将其从内存中删除,然后设置新的位图.这有助于避免任何OOM问题.进一步.您可以使用BitmapFactoryOptions来减小位图的大小.喜欢:

// decodes image and scales it to reduce memory consumption
private Bitmap decodeFile(File f) {
    try {
        // decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        FileInputStream stream1 = new FileInputStream(f);
        BitmapFactory.decodeStream(stream1, null, o);
        stream1.close();

        // Find the correct scale value. It should be the power of 2.
        int width_tmp = o.outWidth, height_tmp = o.outHeight;
        int scale = 1;
        while (true) {
            if (width_tmp / 2 < REQUIRED_WIDTH
                    || height_tmp / 2 < REQUIRED_HIGHT)
                break;
            width_tmp /= 2;
            height_tmp /= 2;
            scale *= 2;
        }

        // decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        FileInputStream stream2 = new FileInputStream(f);
        Bitmap bitmap = BitmapFactory.decodeStream(stream2, null, o2);
        stream2.close();
        return bitmap;
    } catch (FileNotFoundException e) {
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}

Answer 4

在将图像加载到内存之前，使用以下命令压缩图像

Bitmap original = BitmapFactory.decodeStream(getAssets().open("1024x768.jpg"));
ByteArrayOutputStream out = new ByteArrayOutputStream();
original.compress(Bitmap.CompressFormat.PNG, 100, out);
Bitmap decoded = BitmapFactory.decodeStream(new ByteArrayInputStream(out.toByteArray()));

Log.e("Original   dimensions", original.getWidth()+" "+original.getHeight());
Log.e("Compressed dimensions", decoded.getWidth()+" "+decoded.getHeight());  

如果您从资源获取位图，在这种情况下，位图尺寸将取决于手机屏幕密度

Bitmap bitmap=((BitmapDrawable)getResources().getDrawable(R.drawable.img_1024x768)).getBitmap();
Log.e("Dimensions", bitmap.getWidth()+" "+bitmap.getHeight());