我正在用相机 Activity 拍照，然后尝试从保存的位置读取它。不幸的是，位图由以下方式返回:

Bitmap bimage = BitmapFactory.decodeFile( path );

Mat img = Highgui.imread(path);

bmp = Bitmap.createBitmap(img.cols(), img.rows(), Config.ARGB_8888);
Utils.matToBitmap(img, bmp);

BitmapFactory.decodeFile( path );

最佳答案

三星的相机意图Photo capture Intent causes NullPointerException on Samsung phones only有一些问题

试试这个

// call 相机

String _path = Environment.getExternalStorageDirectory()
                    + File.separator + "TakenFromCamera.png";
            File file = new File(_path);
            Uri outputFileUri = Uri.fromFile(file);
            Intent intent = new Intent(
                    android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
            startActivityForResult(intent, 1212);

if (requestCode == 1212) {
            String _path = Environment.getExternalStorageDirectory()
                    + File.separator + "TakenFromCamera.png";
            mBitmap = BitmapFactory.decodeFile(_path);
            if (mBitmap == null) {
            } else {
                Intent intent = new Intent(AYGCamActivity.this,
                        myGalleryImage.class);

                startActivity(intent);
            }

        }

关于android - Android:BitmapFactory.decodeFile/OpenCV确实返回了无效的位图，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9044909/