Question

每当我拨打 UploadActivity.java

时，我都会收到 java.lang.OutOfMemoryError

第176行是：

  Bitmap bm = BitmapFactory.decodeFile(strPath);

查看我的日志：

12-07 17:57:10.585: E/AndroidRuntime(16708): FATAL EXCEPTION: main
12-07 17:57:10.585: E/AndroidRuntime(16708): java.lang.OutOfMemoryError
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:650)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:389)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:449)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at com.example.camera.UploadActivity$ImageAdapter.getView(UploadActivity.java:176)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.AbsListView.obtainView(AbsListView.java:2465)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.ListView.makeAndAddView(ListView.java:1775)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.ListView.fillDown(ListView.java:678)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.ListView.fillFromTop(ListView.java:739)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.ListView.layoutChildren(ListView.java:1628)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.AbsListView.onLayout(AbsListView.java:2300)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.View.layout(View.java:14063)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.ViewGroup.layout(ViewGroup.java:4607)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.RelativeLayout.onLayout(RelativeLayout.java:948)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.View.layout(View.java:14063)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.ViewGroup.layout(ViewGroup.java:4607)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.View.layout(View.java:14063)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.ViewGroup.layout(ViewGroup.java:4607)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1426)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.View.layout(View.java:14063)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.ViewGroup.layout(ViewGroup.java:4607)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.View.layout(View.java:14063)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.ViewGroup.layout(ViewGroup.java:4607)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1996)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1817)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1114)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4520)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.Choreographer.doCallbacks(Choreographer.java:555)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.Choreographer.doFrame(Choreographer.java:525)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.os.Handler.handleCallback(Handler.java:615)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.os.Handler.dispatchMessage(Handler.java:92)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.os.Looper.loop(Looper.java:137)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at android.app.ActivityThread.main(ActivityThread.java:4921)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at java.lang.reflect.Method.invokeNative(Native Method)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at java.lang.reflect.Method.invoke(Method.java:511)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1036)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:803)
12-07 17:57:10.585: E/AndroidRuntime(16708):    at dalvik.system.NativeStart.main(Native Method)

UploadActivity.java： -

public class ImageAdapter extends BaseAdapter
        {
        private Context context;

        public ImageAdapter(Context c)
        {
        // TODO Auto-generated method stub
        context = c;
        }

        public int getCount() {
        // TODO Auto-generated method stub
        return ImageList.size();
        }

        public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
        }

        public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
        }

        public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub

        LayoutInflater inflater = (LayoutInflater) context
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);      

        if (convertView == null) {
        convertView = inflater.inflate(R.layout.list_upload, null);
        }


        // ColImgName
        TextView txtName = (TextView) convertView.findViewById(R.id.ColImgName);
        strPath = ImageList.get(position).toString();

        // Get File Name
        fileName = strPath.substring( strPath.lastIndexOf('/')+1, strPath.length() );
        File file = new File(strPath);
        @SuppressWarnings("unused")
        long length = file.length();
        txtName.setText(fileName);

        // Image Resource
        ImageView imageView = (ImageView) convertView.findViewById(R.id.ColImgPath);
        Bitmap bm = BitmapFactory.decodeFile(strPath);
        imageView.setImageBitmap(bm);


        // ColStatus
        final ImageView txtStatus = (ImageView) convertView.findViewById(R.id.ColStatus);
        txtStatus.setImageResource(R.drawable.bullet_button);

        // progressBar
        final ProgressBar progress = (ProgressBar) convertView.findViewById(R.id.progressBar);
        progress.setVisibility(View.GONE);

        //btnUpload
        final ImageButton btnUpload = (ImageButton) convertView.findViewById(R.id.btnUpload);
        btnUpload.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
        // Upload
        btnUpload.setEnabled(false);

        startUpload(position);
        }
        });

        return convertView;

        }
    }

Answer 1

您需要回收Bitmap对象。

    Bitmap bm = BitmapFactory.decodeFile(strPath);
    imageView.setImageBitmap(bm);

在获取视图中的上述代码行之后，只需添加下面编写的代码 ///现在回收你的位图，这将在每次迭代时释放你的记忆

    if(bm!=null)
   {
     bm.recycle();
     bm=null;
    }

此后，如果您收到同样的错误，

替换以下代码

    Bitmap bm = BitmapFactory.decodeFile(strPath);
    imageView.setImageBitmap(bm);

与

 final BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;

Bitmap bm = BitmapFactory.decodeFile(strPath,options);
imageView.setImageBitmap(bm);

使用inSampleSize将位图加载到内存。对inSampleSize值使用2的幂对于解码器来说更快且更有效。但是，如果您计划将已调整大小的版本缓存在内存或磁盘上，通常仍需要解码到最合适的图像尺寸以节省空间。

有关详情，请参阅加载Large Bitmaps Efficiently

Answer 2

在调用Bitmap之前bm = BitmapFactory.decodeFile（strPath）;

调用它..位图bm = decodeSampledBitmapFromResource（strPath，reqWidth，reqHeight）;

如果再次获取java.lang.OutOfMemoryError，请告诉我

public static int calculateInSampleSize(BitmapFactory.Options options,
            int reqWidth, int reqHeight) {
        // Raw height and width of image
        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;    
        if (height > reqHeight || width > reqWidth) {

            final int halfHeight = height / 2;
            final int halfWidth = width / 2;

            // Calculate the largest inSampleSize value that is a power of 2 and
            // keeps both
            // height and width larger than the requested height and width.
            while ((halfHeight / inSampleSize) > reqHeight
                    && (halfWidth / inSampleSize) > reqWidth) {
                inSampleSize *= 2;
            }
        }
        return inSampleSize;
    }

public static Bitmap decodeSampledBitmapFromResource(String strPath,int reqWidth, int reqHeight) {

        // First decode with inJustDecodeBounds=true to check dimensions
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(strPath, options);
        // Calculate inSampleSize
        options.inSampleSize = calculateInSampleSize(options,reqWidth,
                reqHeight);
        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(strPath, options);;
}

Answer 3

这是您的应用程序的优化问题。你得到的是OutOfMemoryError，因为当你在做BitmapFactory.decodeFile（strPath）时，android正在尝试为该位图分配内存。在您的情况下，系统找不到足够的可用空间来分配，这就是您收到此错误的原因。

现在我可以从您的代码中看到，您正尝试使用ImageAdapter显示图像列表。在这种情况下，您的imageview必须具有比实际图像更小的宽度和高度。

在这里给出一个更普遍的想法：

ImageView宽度*高度= 100dp * 100dp
图像宽度*高度= 800px * 800px。

在这种情况下，尽管我们的imageview width-height是100 * 100，但我们正尝试将800 * 800图像设置为背景。这肯定不是一种有效的方式，因为系统将为800 * 800px图像分配内存，而100 * 100则可以。

这就是为什么在对位图进行任何解码之前，你应该对位图进行采样，以便只分配100 * 100的内存。

您会找到此解释的更详细版本here

Answer 4

我遇到了同样的问题。我收录了上述所有建议，但我仍然遇到了java.lang.outOfMemoryError的问题。经过大量的调整后，最终工作的是缩小图像尺寸（和尺寸）。最初，我有800 x 1000种尺寸的图像。我将它们重新缩放到大约60 x 80（因为这就是我需要的），并且它有效！

因此，除了遵循有关此问题的stackoverflow和其他网站的所有建议之外，还要对图像大小和尺寸进行草根检查。会给你带来很多麻烦。

java.lang.OutOfMemoryError - BitmapFactory.decode（strPath）

4 个答案: