Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: GNU General Public License 

import android.app.Activity;
import android.hardware.Camera;
import android.util.DisplayMetrics;
import android.view.Surface;
import android.util.Log;

public class Main {
    private static final String TAG = "BACKGROUND_VID_OVERLAY";
    static final int NO_CAMERA = -101;

    static int calculateOrientation(Activity activity, int cameraId) {
        if (cameraId == NO_CAMERA)
            return 0;

        DisplayMetrics dm = new DisplayMetrics();
        Camera.CameraInfo info = new Camera.CameraInfo();
        Camera.getCameraInfo(cameraId, info);
        int cameraRotationOffset = info.orientation;
        Log.w(TAG, "cameraRotationOffset = " + cameraRotationOffset);

        activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
        int currentScreenRotation = activity.getWindowManager().getDefaultDisplay().getRotation();
        Log.w(TAG, "currentScreenRotation = " + currentScreenRotation);

        int degrees = 0;
        switch (currentScreenRotation) {
        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;
        }
        Log.w(TAG, "degrees = " + degrees);

        int orientation;
        if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
            orientation = (cameraRotationOffset + degrees) % 360;
            orientation = (360 - orientation) % 360;
        } else {
            orientation = (cameraRotationOffset - degrees + 360) % 360;
        }
        Log.w(TAG, "orientation = " + orientation);

        return orientation;
    }
}