Given a screen orientation and a camera (index), find the degrees required to rotate the camera to align with the current orientation. - Android Camera

Android examples for Camera:Camera Orientation

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  4. Camera Orientation

Description

Given a screen orientation and a camera (index), find the degrees required to rotate the camera to align with the current orientation.

Demo Code


//package com.java2s;
import android.annotation.TargetApi;
import android.app.Activity;

import android.hardware.Camera;
import android.hardware.camera2.CameraCharacteristics;

import android.util.Log;

import android.view.Surface;

public class Main {
    public static final String TAG = "CameraUtils";

    public static int getRotationDegrees(Activity activity,
            Camera.CameraInfo info) {/*ww  w . j  a  v  a 2  s . c om*/
        // The camera's orientation, in ordinal direction degrees
        int cameraOrientation = info.orientation;

        int screenOrientation = activity.getWindowManager()
                .getDefaultDisplay().getRotation();

        // Translate rotation constants into degrees
        if (screenOrientation == Surface.ROTATION_0) {
            screenOrientation = 0;
        } else if (screenOrientation == Surface.ROTATION_90) {
            screenOrientation = 90;
        } else if (screenOrientation == Surface.ROTATION_180) {
            screenOrientation = 180;
        } else {
            screenOrientation = 270;
        }

        // Tare the rotation and get the result in positive degrees. Parens and order of ops are for clarity and to prevent modulo of a negative.
        int degreesToRotate = ((cameraOrientation - screenOrientation) + 360) % 360;

        return degreesToRotate;
    }

    @TargetApi(21)
    public static int getRotationDegrees(Activity activity,
            CameraCharacteristics characteristics, boolean isFront) {
        // The camera's orientation, in ordinal direction degrees
        int cameraOrientation = characteristics
                .get(CameraCharacteristics.SENSOR_ORIENTATION);

        int screenOrientation = activity.getWindowManager()
                .getDefaultDisplay().getRotation();

        // Translate rotation constants into degrees
        if (screenOrientation == Surface.ROTATION_0) {
            screenOrientation = 0;
        } else if (screenOrientation == Surface.ROTATION_90) {
            screenOrientation = 90;
        } else if (screenOrientation == Surface.ROTATION_180) {
            screenOrientation = 180;
        } else {
            screenOrientation = 270;
        }

        // Tare the rotation and get the result in positive degrees. Parens and order of ops are for clarity and to prevent modulo of a negative.
        int degreesToRotate = ((cameraOrientation - screenOrientation) + 360) % 360;

        if (isFront) {
            if (degreesToRotate == 180) {
                degreesToRotate = 0;
            } else if (degreesToRotate == 0) {
                degreesToRotate = 180;
            }
        }
        return degreesToRotate;
    }

    public static void log(String msg) {
        Log.v(TAG, msg);
    }
}

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