set the camera display orientation based on the activity's rotation - Android android.hardware

Android examples for android.hardware:Camera Rotation

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Description

set the camera display orientation based on the activity's rotation

Demo Code

import android.annotation.SuppressLint;
import android.app.Activity;
import android.hardware.Camera;
import android.view.Surface;

public class Main{

    /**// ww w . j  ava2s. co  m
     * set the camera display orientation based on the activity's rotation
     * 
     * @param activity
     * @param cameraId
     * @param camera
     */
    @SuppressLint("NewApi")
    public static void setCameraDisplayOrientation(Activity activity,
            int cameraId, android.hardware.Camera camera) {
        final int rotation = activity.getWindowManager()
                .getDefaultDisplay().getRotation();
        final int rotDeg = getCameraRotationForSurfaceRotation(rotation,
                camera, cameraId);
        if (rotDeg != 0) {
            camera.setDisplayOrientation(rotDeg);
        }
    }
    /**
     * gets the correct rotation of the camera for the surface rotation
     * requested, adjust for front/back camera
     * 
     * @param surfaceRotation
     * @param camera
     * @param cameraID
     * @return
     */
    @SuppressLint("NewApi")
    public static int getCameraRotationForSurfaceRotation(
            int surfaceRotation, Camera camera, int cameraID) {
        android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
        android.hardware.Camera.getCameraInfo(cameraID, info);

        int degrees = 0;

        switch (surfaceRotation) {
        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;
        }
        return result;
    }

}

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