今天我遇到了这个问题。我知道我迟到了，但以防万一有人需要。在我的例子中，如果我在相机意图中传递 Uri，那么输出文件就会被旋转。也就是说，
fun takePhoto() {
val intent = Intent(android.media.action.IMAGE_CAPTURE)
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(xdestination)) // <-- this line is the culprit for me
startActivityForResult(intent, CAMERA_PIC_REQUEST)
}
然后在 onActivity 结果中，您将旋转位图。我不知道为什么会这样。
所以我没有为意图提供 Uri。那就是我写的：
fun takePhoto() {
val intent = Intent(android.media.action.IMAGE_CAPTURE)
startActivityForResult(intent, CAMERA_PIC_REQUEST)
}
因此，在onActivityResult 中，我将返回的图像作为位图。然后我手动将该位图保存在所需的文件/Uri 中。
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == PHOTO_CAPTURE_WITH_CAMERA_REQ_CODE && resultCode == RESULT_OK) {
// 1. handle the image as normal bitmap
val photo: Bitmap? = data?.extras?.get("data") as Bitmap;
// handleImage(SharedData.pendingPhotoUri.pop())
if (photo != null) {
// inside handle camera
handleCameraImage(photo)
};
}
}
private fun handleCameraImage(inputBitmap: Bitmap) {
//2. according to previous implementation, this uri should be the final output image file.
// 3. save the original bitmap in a temp image file
val tempBitmapFile: String = requireActivity().cacheDir.absolutePath +"/temp_photo_"+System.currentTimeMillis();
val fOuttemp: FileOutputStream = FileOutputStream(tempBitmapFile);
inputBitmap.compress(Bitmap.CompressFormat.PNG, 85, fOuttemp);
fOuttemp.flush();
fOuttemp.close();
// 4. use ExifInterface to make sure the photo is in right orientation.
val exifInterface: ExifInterface = ExifInterface(tempBitmapFile);
val orientation: Int = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_UNDEFINED);
Timber.tag(TAG).e("orientation == " + orientation);
var matrix = Matrix();
var isRotationNeeded: Boolean = true;
when(orientation){
ExifInterface.ORIENTATION_NORMAL -> {
Timber.tag(TAG).e("when ExifInterface.ORIENTATION_NORMAL");
// do nothing I guess
isRotationNeeded = false;
}
ExifInterface.ORIENTATION_ROTATE_90 -> {
Timber.tag(TAG).e("when ExifInterface.ORIENTATION_ROTATE_90");
matrix.setRotate(90f);
}
ExifInterface.ORIENTATION_ROTATE_180 -> {
Timber.tag(TAG).e("when ExifInterface.ORIENTATION_ROTATE_180");
matrix.setRotate(180f);
}
ExifInterface.ORIENTATION_ROTATE_270 -> {
Timber.tag(TAG).e("when ExifInterface.ORIENTATION_ROTATE_270");
matrix.setRotate(270f);
}
else -> {
Timber.tag(TAG).e("when else");
isRotationNeeded = false;
}
}
// if in wrong orientation,
// rotate image and save it in the file from step 2.
// else save the original image in the file from step 2.
lateinit var outputBitmap: Bitmap;
if(!isRotationNeeded) {
outputBitmap = inputBitmap;
}else{
outputBitmap = Bitmap.createBitmap(inputBitmap, 0, 0, inputBitmap.width,
inputBitmap.height, matrix, true);
}
val outputBitmapfile: File = File("your_awesome_file");
val fOut: FileOutputStream = FileOutputStream(outputBitmapfile);
outputBitmap.compress(Bitmap.CompressFormat.PNG, 85, fOut);
fOut.flush();
fOut.close();
var outputPhotoUri:Uri = getUriForFile(requireActivty(), outputBitmapfile);
// 5. finally use this photo / Uri to do whatever you want
}
fun getUriForFile(context: Context, file: File?): Uri? {
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
try {
val destCopiedTempFile = File(context.getExternalFilesDir(null).toString() + File.separator + "temp")
FileBackend.copy(file, destCopiedTempFile)
FileProvider.getUriForFile(context,
BuildConfig.APPLICATION_ID + ".fileprovider", destCopiedTempFile)
} catch (e: IllegalArgumentException) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
throw SecurityException(e)
} else {
Uri.fromFile(file)
}
}
} else {
Uri.fromFile(file)
}
}
这对我有用。