控制相机以纵向拍摄照片不会旋转最终图像 [英] Controlling the camera to take pictures in portrait doesn't rotate the final images
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问题描述
我正在尝试控制 Android 相机在人像应用中拍照,但是当我保存照片时,它是横向的.我已经使用 setCameraDisplayOrientation 将图像旋转了 90 个等级()
方法,但不起作用.
I'm trying to controlling the Android camera to take pictures in a portrait app, but when I save the picture, it's in landscape. I've rotated the image 90 grades with setCameraDisplayOrientation()
method, but doesn't work.
然后我发现了这个 post 但 TAG_ORIENTATION
是 0
(未定义).如果我捕获此值并应用旋转值,也不起作用.
Then I've found this post but the TAG_ORIENTATION
is 0
(undefined). If I catch this value and apply a rotation value, doesn't work either.
如何拍摄人像照片并以正确的方向保存?
How I can take a photo in portrait and save it with a good orientation?
/** Initializes the back/front camera */
private boolean initPhotoCamera() {
try {
camera = getCameraInstance(selected_camera);
Camera.Parameters parameters = camera.getParameters();
// parameters.setPreviewSize(width_video, height_video);
// parameters.set("orientation", "portrait");
// parameters.set("rotation", 1);
// camera.setParameters(parameters);
checkCameraFlash(parameters);
// camera.setDisplayOrientation( 0);
setCameraDisplayOrientation(selected_camera, camera);
surface_view.getHolder().setFixedSize(width_video, height_video);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(width_video, height_video);
surface_view.setLayoutParams(lp);
camera.lock();
surface_holder = surface_view.getHolder();
surface_holder.addCallback(this);
surface_holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
setPreviewCamera();
} catch (Exception e) {
Log.v("RecordVideo", "Could not initialize the Camera");
return false;
}
return true;
}
public void setCameraDisplayOrientation(int cameraId, Camera camera) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(cameraId, info);
int rotation = getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0: degrees = 0; break;
case Surface.ROTATION_90: degrees = 90; break;
case Surface.ROTATION_180: degrees = 180; break;
case Surface.ROTATION_270: degrees = 270; break;
}
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
camera.setDisplayOrientation(result);
}
public static Bitmap rotate(Bitmap bitmap, int degree) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
// mtx.postRotate(degree);
mtx.setRotate(degree);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}
@Override
public void onPictureTaken(byte[] data, Camera camera) {
String timeStamp = Calendar.getInstance().getTime().toString();
output_file_name = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + File.separator + timeStamp + ".jpeg";
File pictureFile = new File(output_file_name);
if (pictureFile.exists()) {
pictureFile.delete();
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
Bitmap realImage = BitmapFactory.decodeFile(output_file_name);
ExifInterface exif=new ExifInterface(pictureFile.toString());
Log.d("EXIF value", exif.getAttribute(ExifInterface.TAG_ORIENTATION));
if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("6")){
realImage= rotate(realImage, 90);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("8")){
realImage= rotate(realImage, 270);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("3")){
realImage= rotate(realImage, 180);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("0")){
realImage= rotate(realImage, 45);
}
boolean bo = realImage.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.close();
Log.d("Info", bo + "");
} catch (FileNotFoundException e) {
Log.d("Info", "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d("TAG", "Error accessing file: " + e.getMessage());
}
}
推荐答案
问题是我保存图片的时候没做好.
The problem is when I saved the image I didn't do well.
@Override
public void onPictureTaken(byte[] data, Camera camera) {
String timeStamp = new SimpleDateFormat( "yyyyMMdd_HHmmss").format( new Date( ));
output_file_name = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + File.separator + timeStamp + ".jpeg";
File pictureFile = new File(output_file_name);
if (pictureFile.exists()) {
pictureFile.delete();
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
Bitmap realImage = BitmapFactory.decodeByteArray(data, 0, data.length);
ExifInterface exif=new ExifInterface(pictureFile.toString());
Log.d("EXIF value", exif.getAttribute(ExifInterface.TAG_ORIENTATION));
if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("6")){
realImage= rotate(realImage, 90);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("8")){
realImage= rotate(realImage, 270);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("3")){
realImage= rotate(realImage, 180);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("0")){
realImage= rotate(realImage, 90);
}
boolean bo = realImage.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.close();
((ImageView) findViewById(R.id.imageview)).setImageBitmap(realImage);
Log.d("Info", bo + "");
} catch (FileNotFoundException e) {
Log.d("Info", "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d("TAG", "Error accessing file: " + e.getMessage());
}
}
public static Bitmap rotate(Bitmap bitmap, int degree) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
// mtx.postRotate(degree);
mtx.setRotate(degree);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}
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