安卓开发04：OpenCV SDK下载及Android Java环境搭建

一、官方网站下载sdk：https://opencv.org

1、悬停Library后点击Releases

2、点击Android，打开网页后会自动下载

打开后得到以下内容

二、打开Android新建项目进行测试，依次点击File -> New -> New Project

• 选择Empty Activity，点击Next
  
• Name栏输入OpenCVTest（命名自定义），点击Finish
  

三、将OpenCV SDK导入项目

• 将视图切换到Project，右键项目总目录，选择New -> Module
  然后选择Android Library，将模块命名为opencv-test（自定义命名）
  最后点击Finish
  
• 删除目录下所有内容
  
• 复制sdk目录下的内容到模块opencv-test下
  
• 打开opencv-test目录下的build.gradle文件，删除图中kotlin那一行，然后点击Sync Now
  
• 显示BUILD SUCCESSFUL即可
  

四、将opencv-test模块依赖到app模块中

• 打开app模块下的build.gradle，在dependencies中加入以下内容，点击Sync Now

implementation 'com.rabbitmq:amqp-client:5.12.0'
implementation project(path: ':opencv-test')

• 在app模块下的src/main/java的包目录下新建Activity：OpencvTestActivity

public class OpencvTestActivity extends Activity {
   
   

    ConnectionFactory factory;
    //定义线程池处理上帝视角引起的程序卡死问题
    private final ThreadPoolExecutor threadPoolExecutor = new
            ThreadPoolExecutor(3, 10, 1, TimeUnit.MILLISECONDS, new LinkedBlockingDeque<>());
    private boolean mQuit = false;//当为true的时候退出画图线程
    private boolean closeCompleteFlag = false;//当为true的时候表示通道和连接都关闭
    //播放视频页面（前、后、左、右）
    private SurfaceHolder surfaceHolder;
    private static final String TAG = "opencv启动日志";
    //消费rabbitmq数据的线程
    Runnable basicConsumeRunnable;
    volatile String picture;
    //画图的runnable
    Runnable drawRunnable;
    //全局定义各视角连接和通道，便于退出Activity后关闭
    Connection connection;
    Channel channel;
    //关闭通道和连接的runnable
    Runnable closeRunnable;
    private final String TAG_THREAD = "线程池";
    private static final String TAG_RABBITMQ = "RabbitMQ";

    @Override
    public void onCreate(Bundle savedInstanceState) {
   
   
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_opencv);
        //初始化opencv相关变量
        initOpencv();
        playVideo();
    }

    private void initOpencv() {
   
   
        SurfaceView mySurfaceView = findViewById(R.id.surfaceViewTest);
        surfaceHolder = mySurfaceView.getHolder();
        setupConnectionFactory();
    }

    //上帝视角相关函数以及线程的开启和关闭 Start
    @SuppressLint("HandlerLeak")
    private void playVideo() {
   
   
        //用于从线程中获取数据，更新ui
        Handler incomingMessageHandler = new Handler() {
   
   
            @Override
            public void handleMessage(Message msg) {
   
   
                picture = msg.getData().getString("msg");
            }
        };
        //视频号
        basicConsumeRunnable = getBasicConsumeRunnable(incomingMessageHandler);
        threadPoolExecutor.execute(basicConsumeRunnable);
        surfaceHolder.addCallback(new SurfaceHolder