在某些设备中拍摄照片android的OutOfMemeryError

在某些设备和某些版本的Android中用相机拍照时,我遇到问题.例如,在我的Xperia U v4.0.3中,我的代码可以正常工作,但在另一个xperia U v2.3.3中,则无法正常工作…

我读到很多有关此错误的信息,但无法解决…

我拍摄照片并显示的代码：

public void callCamera(){
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File photo = new File(Environment.getExternalStorageDirectory(),  "Pic.jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photo));
imageUri = Uri.fromFile(photo);
startActivityForResult(intent, SELECT_CAMERA);
}

public void onActivityResult(int requestCode, int resultCode, Intent data) {
            if (requestCode == SELECT_CAMERA) {


                Uri selectedImage = imageUri;
                getContentResolver().notifyChange(selectedImage, null);

                ContentResolver cr = getContentResolver();

                try {

                    imageSelected = android.provider.MediaStore.Images.Media
                     .getBitmap(cr, selectedImage);
                    // I tried to read the image created for the camera in the Sd
                    //But I've got the same error... 
                    //imageSelected = Utils.readImageSD(this, selectedImage.getPath());

                     imageSelected = Utils.rotateImage(Utils.scaleBitmap(imageSelected, 160, 160));
                     ivImageLoad.setImageBitmap(imageSelected);

                } catch (Exception e) {
                    Utils.showToast(getApplicationContext(), R.string.errorLoad);
                    Log.e("Camera", e.toString());
                }

            }

}

我希望有人能帮助我…我不知道该怎么办…

提前致谢.

问候.

解决方法:

看起来您只想显示一个160×160的位图,但是在这一行上,您正在读取整个位图,然后将其缩小.

imageSelected = android.provider.MediaStore.Images.Media(cr, selectedImage);

您可以避免使用inJustDecodeBounds将整个位图加载到内存中,然后可以使用inSampleSize对其进行缩放.

这是来自Loading Large Bitmaps Efficiently的Android系列的一些示例代码

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) {
        if (width > height) {
            inSampleSize = Math.round((float)height / (float)reqHeight);
        } else {
            inSampleSize = Math.round((float)width / (float)reqWidth);
        }
    }
    return inSampleSize;
}

public static Bitmap decodeSampledBitmapFromUri(Uri uri,
        int reqWidth, int reqHeight) {


    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(getContentResolver().openInputStream(uri), options);

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

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeStream(getContentResolver().openInputStream(uri), null, options);
}

然后,获取160×160的图片,您只需执行以下操作：

ivImageLoad.setImageBitmap(decodeSampledBitmapFromUri(selectedImage, 100, 100));

标签：camera,out-of-memory,android
来源： https://codeday.me/bug/20191031/1977390.html