安卓：BitmapFactory.de codeFILE / OpenCV中不会返回invaild位图 [英] Android: BitmapFactory.decodeFile / OpenCV does return invaild Bitmap

问题描述

我正在用相机的活动图片，然后尝试从保存的位置读取它。不幸的是通过位图returnd：

I'm taking a picture with the camera activity and then try to read it from the saved location. Unfortunately the Bitmap returnd by:

Bitmap bimage = BitmapFactory.decodeFile( path );

有高度和宽度= -1。
我使用OpenCV的，当我阅读

has height and width = -1. I'm using OpenCV and when I read the image with

Mat img = Highgui.imread(path);

我得到一个正确的矩阵。 Altough我不能将它转换为位图。当执行

I get a proper matrix. Altough I cannot convert it to a bitmap. When doing

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

我再次得到了相同的结果：宽度和高度= -1位图。我需要注意的图像格式？我可以设置相机意图是什么？不应

I get the same result again: A Bitmap with width and height = -1. Do I need to watch out for the image format? Can I set that on the camera intent? Shouldn't

BitmapFactory.decodeFile( path );

自动实现的格式是什么？

automatically realize what the format is?

我在三星Galaxy S的Andr​​oid 2.3.1运行此和OpenCV 2.3.1

I'm running this on a Samsung galaxy S with Android 2.3.1 and OpenCV 2.3.1

感谢您的帮助。

推荐答案

三星与相机意图一些问题<一href=\"http://stackoverflow.com/questions/7031374/photo-capture-intent-causes-nullpointerexception-on-samsung-phones-only/7031422#7031422\">Photo拍摄意图导致NullPointerException异常三星手机只

Samsung has some issues with camera intent Photo capture Intent causes NullPointerException on Samsung phones only

试试这个方法。

//调用摄像头

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);

//在活动onResult

// in activity onResult

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);
            }

        }

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