Main.java Source code

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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.content.Context;
import android.hardware.Camera;

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

public class Main {
    /**
     * Set Camera orientation to correct one
     * @param context app context
     * @param camera camera to set orientation
     */
    public static void setCameraDisplayOrientation(Context context, Camera camera) {
        if (camera == null) {
            return;
        }

        Camera.CameraInfo info = new Camera.CameraInfo();
        Camera.getCameraInfo(getCameraInformationId(), info);

        WindowManager winManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        int rotation = winManager.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 (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;
        }
        camera.setDisplayOrientation(result);
    }

    /**
     * Return the back facing camera id
     * @return id of the camera
     */
    public static int getCameraInformationId() {
        int cameraId = -1;
        int numberOfCameras = Camera.getNumberOfCameras();
        for (int i = 0; i < numberOfCameras; i++) {
            Camera.CameraInfo info = new Camera.CameraInfo();
            Camera.getCameraInfo(i, info);
            if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
                cameraId = i;
                break;
            }
        }
        return cameraId;
    }
}