Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import android.content.Context;

import android.hardware.Camera;

import android.view.Surface;
import android.view.WindowManager;

public class Main {
    private static int cameraNumber = -1;

    public static int getPortraitCamearaDisplayOrientation(Context context, int cameraId, boolean isFrontCamera) {
        if (cameraId < 0 || cameraId > getCameraNumber()) {
            return -1;
        }
        Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
        Camera.getCameraInfo(cameraId, cameraInfo);

        int rotation = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).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 (isFrontCamera) {
            result = (cameraInfo.orientation + degrees) % 360;
            result = (360 - result) % 360;
        } else {
            result = (cameraInfo.orientation - degrees + 360) % 360;
        }
        return result;
    }

    public static int getCameraNumber() {
        if (cameraNumber == -1) {
            cameraNumber = Camera.getNumberOfCameras();
        }
        return cameraNumber;
    }

    public static Camera.CameraInfo getCameraInfo(int id) {
        if (id >= 0 && id < getCameraNumber()) {
            Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
            Camera.getCameraInfo(id, cameraInfo);
            return cameraInfo;
        }
        return null;
    }
}