Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.annotation.TargetApi;
import android.hardware.Camera;
import android.os.Build;

public class Main {
    /**
     * @return the default front facing camera on the device. Returns null if camera is not
     * available.
     */
    public static Camera getDefaultFrontFacingCameraInstance() {
        return getDefaultCamera(Camera.CameraInfo.CAMERA_FACING_FRONT);
    }

    /**
     *
     * @param position Physical position of the camera i.e Camera.CameraInfo.CAMERA_FACING_FRONT
     *                 or Camera.CameraInfo.CAMERA_FACING_BACK.
     * @return the default camera on the device. Returns null if camera is not available.
     */
    @TargetApi(Build.VERSION_CODES.GINGERBREAD)
    private static Camera getDefaultCamera(int position) {

        int id = getDefaultCameraId(position);
        if (id != -1) {
            return Camera.open(id);
        }

        return null;
    }

    public static int getDefaultCameraId(int position) {
        int mNumberOfCameras = Camera.getNumberOfCameras();

        // Find the ID of the back-facing ("default") camera
        Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
        for (int i = 0; i < mNumberOfCameras; i++) {
            Camera.getCameraInfo(i, cameraInfo);
            if (cameraInfo.facing == position) {
                return i;

            }
        }
        return -1;
    }
}