MediaStore.Images.Media.getBitmap和内存不足错误

Question

我的代码是:

public Bitmap loadPhoto(Uri uri) {
    Bitmap scaled = null;
    try {
    scalled = Bitmap.createBitmap(
      MediaStore.Images.Media.getBitmap(getContentResolver(), uri),
      0,0,90, 90);

    if (scaled == null) { return null; }
    } catch(Exception e) { }
    return scaled;
}

在这之后.我在ImageView中显示缩放.每张图片都来自设备相机.

每次,我都会收到错误:我从相机显示三张照片后内存不足.怎么解决这个？

Answer 1

Praveen Katha 的答案将始终返回 null。这是更新的答案。

这是技巧，每次使用后关闭输入流。输入流意味着只使用一次。想了解更多请关注这个回答

private 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 decodeSampledBitmapFromUri(Context context, Uri imageUri, int reqWidth, int reqHeight) throws FileNotFoundException {
        Bitmap bitmap = null;
        try {
            // Get input stream of the image
            final BitmapFactory.Options options = new BitmapFactory.Options();
            InputStream iStream = context.getContentResolver().openInputStream(imageUri);

            // First decode with inJustDecodeBounds=true to check dimensions
            options.inJustDecodeBounds = true;
            BitmapFactory.decodeStream(iStream, null, options);
            if (iStream != null) {
                iStream.close();
            }
            iStream = context.getContentResolver().openInputStream(imageUri);

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

            // Decode bitmap with inSampleSize set
            options.inJustDecodeBounds = false;
            bitmap = BitmapFactory.decodeStream(iStream, null, options);
            if (iStream != null) {
                iStream.close();
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return bitmap;
    }

Answer 2

尝试使用 BitmapFactory 解决问题http://developer.android.com/reference/android/graphics/BitmapFactory.html