用相机意图拍照以肖像模式android旋转图片
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【中文标题】用相机意图拍照以肖像模式android旋转图片【英文标题】:Taking picture with camera intent rotate picture in portrait mode android 【发布时间】:2014-03-13 15:54:58 【问题描述】:使用相机成功拍摄了照片,但在三星 Galaxy s3 的人像模式下,照片会旋转。我该如何解决这个问题。 相机意图如下:
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(xdestination));
startActivityForResult(intent, CAMERA_PIC_REQUEST);
结果活动中
if (requestCode==CAMERA_PIC_REQUEST)
// Bitmap bm = (Bitmap) data.getExtras().get("data");
Uri photo_uri = Uri.fromFile(xdestination);
Editer.PHOTO_FROM=11;
Bitmap decodeSampledBitmapFromFile=null;
try
decodeSampledBitmapFromFile = decodeUri(photo_uri);
catch (FileNotFoundException e1)
// TODO Auto-generated catch block
e1.printStackTrace();
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
decodeSampledBitmapFromFile.compress(Bitmap.CompressFormat.JPEG,100, bytes);
File f = new File(Environment.getExternalStorageDirectory(), "user_image.jpg");
try
if(f.exists())
f.delete();
f.createNewFile();
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
fo.close();
catch (IOException e)
e.printStackTrace( );
Log.d("ERROR", e.toString());
【问题讨论】:
我也遇到了同样的问题,拍完后我旋转了图片。 你能告诉我你是如何旋转图片的吗?如果可能,请发布您的代码或部分代码 试试我下面的代码,让我知道它是否适合你。 好,但不是我的问题,我需要旋转保存在路径 File f = new File(Environment.getExternalStorageDirectory(), "user_image.jpg"); Why does an image captured using camera intent gets rotated on some devices on Android?的可能重复 【参考方案1】:将您拍摄的图片和该图片的 SDCard 路径传递给以下方法,该方法将返回正确方向的图片...
private Bitmap imageOreintationValidator(Bitmap bitmap, String path)
ExifInterface ei;
try
ei = new ExifInterface(path);
int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
switch (orientation)
case ExifInterface.ORIENTATION_ROTATE_90:
bitmap = rotateImage(bitmap, 90);
break;
case ExifInterface.ORIENTATION_ROTATE_180:
bitmap = rotateImage(bitmap, 180);
break;
case ExifInterface.ORIENTATION_ROTATE_270:
bitmap = rotateImage(bitmap, 270);
break;
catch (IOException e)
e.printStackTrace();
return bitmap;
private Bitmap rotateImage(Bitmap source, float angle)
Bitmap bitmap = null;
Matrix matrix = new Matrix();
matrix.postRotate(angle);
try
bitmap = Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(),
matrix, true);
catch (OutOfMemoryError err)
err.printStackTrace();
return bitmap;
【讨论】:
对不起,我做了 decodeSampledBitmapFromFile = imageOreintationValidator(decodeSampledBitmapFromFile,f.getPath()); decodeSampledBitmapFromFile.compress(Bitmap.CompressFormat.JPEG,100, bytes);但横向效果图仍然没有 如何从相机获取“字符串路径”?【参考方案2】:使用:
public int getCameraPhotoOrientation(Context context, Uri imageUri, String imagePath)
int rotate = 0;
try
context.getContentResolver().notifyChange(imageUri, null);
File imageFile = new File(imagePath);
ExifInterface exif = new ExifInterface(imageFile.getAbsolutePath());
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
switch (orientation)
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
Log.i("RotateImage", "Exif orientation: " + orientation);
Log.i("RotateImage", "Rotate value: " + rotate);
catch (Exception e)
e.printStackTrace();
return rotate;
【讨论】:
【参考方案3】:像下面这样试试。
File photo = new File(Environment.getExternalStorageDirectory(), "user_image.jpg");
if (photo.exists())
Bitmap myBitmap = BitmapFactory.decodeFile(photo
.getAbsolutePath());
imageView.setImageBitmap(myBitmap);
imageView.setRotation(90);
第 1 步:提供照片的完整路径,例如 File photo = new File(Environment.getExternalStorageDirectory()
, "Face.jpg");
第2步:检查照片是否存在,如果存在则将其设置为图像视图并将其旋转90度。
【讨论】:
【参考方案4】:您别无选择,只能读取图像,将其旋转并将结果写回 SD 卡。使用 BitmapFactory 的直接方法很容易run into OutOfMemory exception。
或者,您可以使用JPEG lossless rotation,使用jpegtran。
在 SourceForge 上有一个 Java 开源类LLJTran。 Android 端口是on GitHub。
【讨论】:
【参考方案5】: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。
【讨论】:
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