Question

我的Android应用程序的代码如下：

private PictureCallback pictureTakenCallback = new PictureCallback() {

    @Override
    public void onPictureTaken(byte[] data, Camera camera) {
        Bitmap bmp = null;
        Bitmap scaledBitmap = null;
        ByteArrayOutputStream baos = null;

        showLoading(true);//UI crap

        try
        {
            bmp = BitmapFactory.decodeByteArray(data, 0, data.length); //OOM Exception Thrown Here

            //if the bitmap is smaller than 1600 wide, scale it up while preserving aspect ratio
            if(bmp.getWidth() < 1600) {
                int originalHeight = bmp.getHeight();
                int originalWidth = bmp.getWidth();

                scaledBitmap = Bitmap.createScaledBitmap(bmp, 1600,
                        originalHeight*1600/originalWidth, true);

                bmp = scaledBitmap;
                scaledBitmap = null;
            }

            baos = new ByteArrayOutputStream();
            bmp.compress(Bitmap.CompressFormat.JPEG, 30, baos); // 30% compression
            image = baos.toByteArray();

            submitImage();
        }
        catch (java.lang.OutOfMemoryError e) {
            e.printStackTrace();
            showLoading(false);
        }
        catch (Exception e) {
            e.printStackTrace();
            showLoading(false);
        }
        finally
        {
            bmp = null;

            if (baos != null) {
                try {
                    baos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            baos = null;
        }
    }
};

有时我会让用户抱怨内存异常会被扔到手机上。我的设备从未遇到过这个问题，这可能与手机内存不足有关吗？

有人可以查看此代码并向我提供有关如何提高效率的提示吗？谢谢！

Answer 1

总是在这样的清单中尝试 android：largeHeap =“true”

<application 
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:largeHeap="true"
        >

Answer 2

您可以将缩小版本加载到内存中

您需要查看Loading Large Bitmaps Efficiently开发者网站

如何使用BitmapFactory.decodeByteArray避免不一致的OutOfMemory异常？

2 个答案: