Question

在将5或6个图库图片加载到我的应用中后，我不断获得Out Of Memory Errors。

我在每个图片完成加载后调用bitmap.recycle()，所以想知道为什么我仍然会收到OOM错误？

这是我处理图库图片的方式：

从应用内部按下按钮进入图库以选择图像
返回应用程序，并将图库图像复制到应用程序的外部文件目录
压缩并旋转图像

将图片加载到ImageView

public static void compressAndRotateImage(Context context, String filename) {
try {
    File file = new File(context.getExternalFilesDir(null), filename);

    // Decode image size
    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(new FileInputStream(file), null, o);

    // The new size we want to scale to
    final int REQUIRED_SIZE = 720;

    // Find the correct scale value. It should be the power of 2.
    int scale = 1;
    while (o.outWidth/scale/2 >= REQUIRED_SIZE && o.outHeight/scale/2 >= REQUIRED_SIZE) { scale*=2; }

    // Decode with inSampleSize
    BitmapFactory.Options o2 = new BitmapFactory.Options();
    o2.inSampleSize = scale;
    Bitmap bm = BitmapFactory.decodeStream(new FileInputStream(file), null, o2);

    // Get orientation of picture
    ExifInterface exif = null;
    try { exif = new ExifInterface(context.getExternalFilesDir(null) + "/" + filename); } 
    catch (IOException e1) { e1.printStackTrace(); }
    int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1);
    Log.i("ORIENTATION", Integer.toString(orientation));

    // Rotate image to portrait based on taken orientation
    Matrix matrix = new Matrix();
    if (orientation == 6) { matrix.postRotate(90); }
    else if (orientation == 3) { matrix.postRotate(180); }
    else if (orientation == 8) { matrix.postRotate(270); }
    bm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true);

    // Save and compress file
    FileOutputStream fos = new FileOutputStream(file);
    bm.compress(Bitmap.CompressFormat.JPEG, 90, fos);
    try { fos.flush(); fos.close(); } 
    catch (IOException e) { e.printStackTrace(); }

    bm.recycle();
    System.gc();
} 
catch (FileNotFoundException e) { e.printStackTrace(); }

}

将图库图片复制到应用外部文件目录

private void copyGalleryImage(Uri uri) {
String realPath = ImageHandler.getRealPathFromUri(this, uri);
File galleryFile = new File(realPath);

imgFilename = ImageHandler.getImageFilename(this);
File file = new File(getExternalFilesDir(null), imgFilename);
GlobalMethods.copyFile(galleryFile, file);
Log.i("IMAGE COPIED TO INTERNAL", imgFilename);

ImageHandler.compressAndRotateImage(this, imgFilename);
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
NewPictureFragment fragment = NewPictureFragment.newInstance(imgFilename);
ft.replace(R.id.fragment_container, fragment);
ft.addToBackStack(null);
ft.commit();
}

Answer 1

在清单文件中使用android:largeHeap="true"。也许这可以解决你的问题。

将图库图像加载到应用程序中，加载第5或第6张图片后出现内存错误

1 个答案: