图库中的一些照片在某些设备Android Kotlin上旋转

Question

我正在使用Jetpack Compose开发Android应用程序。这些天，我在一些设备上测试了这款应用，发现设备图库中的一些照片(不是全部)在一台设备上旋转(Fujitsu的901FJ, Android版本是9)。有些照片旋转90度，有些是颠倒的。我读过一些用Java写的代码，但我只懂Kotlin。我还是不知道如何修改代码。有人能帮帮我吗?
SignupView代码

@OptIn(ExperimentalFoundationApi::class, ExperimentalComposeUiApi::class)
@Composable
fun Signup(navController: NavController, auth: FirebaseAuth, mainViewModel: MainViewModel) {
val requester = remember { BringIntoViewRequester() }
val scope = rememberCoroutineScope()
val context = LocalContext.current
val dataStore = StoreUserData(context)
var imageBitmap by remember { mutableStateOf<Bitmap?>(null) }
val galleryLauncher =
rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri: Uri? ->
uri?.getBitmapOrNull(context.contentResolver)?.let { bitmap: Bitmap ->
imageBitmap = Bitmap.createScaledBitmap(bitmap, 120, 120, true)
}
}
...    
Column(
modifier = Modifier
.background(Beige)
.fillMaxSize(),
verticalArrangement = Arrangement.Center,
horizontalAlignment = Alignment.CenterHorizontally
) {
Spacer(modifier = Modifier.height(20.dp))
Row(
modifier = Modifier
.fillMaxWidth(),
horizontalArrangement = Arrangement.Center
) {
Text(text = "Signup", fontSize = 32.sp, color = Brown)
}
Column(
modifier = Modifier
.fillMaxWidth(),
horizontalAlignment = Alignment.CenterHorizontally
) {
Row() {
if (imageBitmap != null) {
Image(
painter = rememberImagePainter(imageBitmap),
contentScale = ContentScale.FillBounds,
contentDescription = null,
modifier = Modifier
.width(60.dp)
.height(60.dp)
.clip(CircleShape)
)
} else {
Image(
painter = painterResource(id = R.drawable.coffee),
contentDescription = null,
contentScale = ContentScale.Fit,
modifier = Modifier
.size(60.dp)
.clip(CircleShape)
)
}
}
Row() {
Button(
onClick = { galleryLauncher.launch("image/*") },
modifier = Modifier
.wrapContentSize(),
colors = ButtonDefaults.textButtonColors(
backgroundColor = Pink,
contentColor = Brown,
disabledContentColor = Color.LightGray
)
) {
Text(text = "Select a photo")
}
}          
...

}

fun Uri.getBitmapOrNull(contentResolver: ContentResolver): Bitmap? {
return kotlin.runCatching {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
val source = ImageDecoder.createSource(contentResolver, this)
ImageDecoder.decodeBitmap(source)
} else {
MediaStore.Images.Media.getBitmap(contentResolver, this)
}
}.getOrNull()
}

Answer 1

多亏了这些有帮助的评论，我才能够了解到"exifinterface"。这些是我添加的代码，这很好。
build.gradle (app)

implementation 'androidx.exifinterface:exifinterface:1.3.6'

val galleryLauncher =
rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri: Uri? ->
uri?.getBitmapOrNull(context.contentResolver)?.let { bitmap: Bitmap ->
val orientation = uri?.getOrientation(context.contentResolver)
val rotatedBitmap = orientation?.let { rotateBitmap(bitmap, it) } ?: bitmap
imageBitmap = Bitmap.createScaledBitmap(rotatedBitmap, 120, 120, true)
}
}
fun Uri.getOrientation(contentResolver: ContentResolver): Int {
var orientation = ExifInterface.ORIENTATION_UNDEFINED
try {
contentResolver.openInputStream(this)?.use { inputStream ->
val exifInterface = ExifInterface(inputStream)
orientation = exifInterface.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_UNDEFINED
)
}
} catch (e: IOException) {
e.printStackTrace()
}
return orientation
}

fun rotateBitmap(bitmap: Bitmap, orientation: Int): Bitmap {
val matrix = Matrix()
when (orientation) {
ExifInterface.ORIENTATION_FLIP_HORIZONTAL -> matrix.setScale(-1f, 1f)
ExifInterface.ORIENTATION_ROTATE_90 -> matrix.setRotate(90f)
ExifInterface.ORIENTATION_TRANSVERSE -> {
matrix.setRotate(270f)
matrix.postScale(-1f, 1f)
}
ExifInterface.ORIENTATION_ROTATE_180 -> matrix.setRotate(180f)
ExifInterface.ORIENTATION_FLIP_VERTICAL -> matrix.setRotate(180f)
ExifInterface.ORIENTATION_TRANSPOSE -> {
matrix.setRotate(90f)
matrix.postScale(-1f, 1f)
}
ExifInterface.ORIENTATION_ROTATE_270 -> matrix.setRotate(270f)
else -> return bitmap
}
return Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)
}