Android IMAGE_CAPTURE返回RESULT_CANCELED

Question

我正在尝试使用MediaStore.ACTION_IMAGE_CAPTURE意图拍摄个人资料照片。

启动意图的代码：

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File myPicture = new File(OfflineApp.getAppContext().getFilesDir() + "/" + getResources().getString(R.string.contact_photos_dir), getResources().getString(R.string.my_photo_file_name));
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(myPicture));
startActivityForResult(cameraIntent, REQUEST_CODE_TAKE_PHOTO);

和onActivityResult部分：

case REQUEST_CODE_TAKE_PHOTO:
    if (resultCode == RESULT_OK) {
        String path = new File(OfflineApp.getAppContext().getFilesDir() + "/" + getResources().getString(R.string.contact_photos_dir), getResources().getString(R.string.my_photo_file_name)).getAbsolutePath();
        ContactManager.getInstance().updateMyImage(path);
    }
    break;

但是，结果代码始终是RESULT_CANCELED，只有当我提供MediaStore.EXTRA_OUTPUT时，即使该文件不存在。

Answer 1

好的。发现了问题。

由于Camera Intent正在启动Camera应用程序，因此无法访问我的apps文件夹。通过传递外部文件夹文件并将其复制到我的本地文件夹来修复它。

干杯。

Answer 2

您可以让相机应用程序将图像保存在这样的外部文件中，然后再使用此处的图像

private void captureImage() {
    // You can pass an external file Uri to the intent to which the camera app can write
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    // File file = new File(getCacheDir(), IMAGE_FILENAME); // this doesn't work as the camera app doesn't have permission to this apps cache dir
    // File file = new File("/sdcard/image.jpg"); // avoid hardcoding file names
    File file = new File(Environment.getExternalStorageDirectory(), IMAGE_FILENAME);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));

    // intent.setData(Uri.fromFile(file));
    // intent.putExtra(MediaStore.EXTRA_OUTPUT, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    startActivityForResult(intent, REQUEST_CODE_CAPTURE_IMAGE);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(resultCode == RESULT_OK){
        if(requestCode == REQUEST_CODE_CAPTURE_IMAGE){
            File file = new File(Environment.getExternalStorageDirectory(), IMAGE_FILENAME);
            Uri uri = Uri.fromFile(file);
            mImagePath = uri.getPath();
            String extension = MimeTypeMap.getFileExtensionFromUrl(mImagePath);
            if(extension != null){
                mImageMIMEType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
            } else {
                mImageMIMEType = "image/jpg"; // fallback, also a best guess
            }
            // use image here
        }
    }
}

Answer 3

请改用此文件：

    File storageDir =  context.getExternalFilesDir(Environment.DIRECTORY_PICTURES);
    try {
         File myPicture = File.createTempFile(String.valueOf(DateUtils.nowInMillis()), you_extension, storageDir);
    } catch (Exception e) {
         e.printStackTrace();
    }