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I'm using the camera to show preview only (not to take pictures or record videos).
The app is always in portrait mode (landscape mode is disabled).
The camera preview is always rotated 90 degrees ccw and I can't change it
(neither with setDisplayOrientation nor with p.set("orientation", "portrait" ) and p.set("rotation", 90) ).
Is the preview ALWAYS rotated like this or is it device dependent? If it was always like this in portrait mode, I could just rotate the image afterwards.
Or is there a way to set up the camera correctly? I've read a lot of threads about this but no answer worked for me (Galaxy s2, Android v2.3)
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Setting the app upWhen on the main screen, under the orientation section, you will see a number of options like 'Auto-rotate OFF', 'Auto-rotate ON', 'Forced Portrait' and 'Forced Landscape'. As the names suggest, you can use these buttons as one-tap shortcuts to toggle the orientation of your device.
To do this, swipe down from the right side of the top panel. Hold the device in the orientation in which you want it locked. On the drop-down menu, touch the “Auto Rotate” button. The “Auto Rotate” button becomes the “Rotation Locked” button.
Rotate your phone to change the screen orientation (if Auto Rotate is enabled). If Auto Rotate is enabled, your phone's screen will automatically flip to portrait mode when you are holding it upright. When you are holding it horizontally, it will automatically switch to Landscape mode.
Answer: Most phone cameras are landscape, meaning if you take the photo in portrait, the resulting photos will be rotated 90 degrees. In this case, the camera software should populate the Exif data with the orientation that the photo should be viewed in.
To force portrait orientation:
set android:screenOrientation="portrait" in your AndroidManifest.xml and call camera.setDisplayOrientation(90); before calling camera.startPreview();
I have not tested on the GS2 but it works on every phone I have tested on.
Note: setDisplayOrientation was added in API Level 8
105
I have coded the app for only Portrait Mode.
camera.setDisplayOrientation(90);
Will make the Camera to rotate to 90 degree and This may result in not suitable Orientation for some devices in android In order to get the Correct Preview for all android devices use the following code which is refereed in developers site.
Below you have to send your activity, cameraId = back is 0 and for Front camera is 1
public static void setCameraDisplayOrientation(Activity activity, int cameraId, android.hardware.Camera camera) {
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(cameraId, info);
int rotation = activity.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;
//int currentapiVersion = android.os.Build.VERSION.SDK_INT;
// do something for phones running an SDK before lollipop
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);
}
This is how to set the setDisplayOrientation for camera which will perfectly for all android devices.
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