/**
   * 定義服務綁定的回調 開啟視頻通話服務連接
   */
  private ServiceConnection mVideoCallServiceConnection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      // 獲取服務的操作對象
      FloatWindowService.MyBinder binder = (FloatWindowService.MyBinder) service;
      binder.getService();
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {

    }
  };

/*
   * 開啟懸浮Video服務
   */
  private void startVideoService() {
    //最小化Activity
    moveTaskToBack(true);//將activity置于后臺
    //開啟服務顯示懸浮框
    Intent serviceVideoIntent = new Intent(this, FloatWindowService.class);
    mServiceBound = bindService(serviceVideoIntent, mVideoCallServiceConnection, Context.BIND_AUTO_CREATE);//綁定Service
  }

//在onDestroy（）與onReStart（）中解綁并銷毀相關內容
if (mServiceBound) {
      unbindService(mVideoCallServiceConnection);//解綁
      mServiceBound = false;
    }

/**
 * 視頻懸浮窗服務
 */
public class FloatWindowService extends Service implements View.OnTouchListener {
  private WindowManager mWindowManager;
  private WindowManager.LayoutParams wmParams;
  private LayoutInflater inflater;
  //浮動布局view
  private View mFloatingLayout;
  //容器父布局
  private View mMainVIew;
 
  //開始觸控的坐標，移動時的坐標（相對于屏幕左上角的坐標）
  private int mTouchStartX, mTouchStartY, mTouchCurrentX, mTouchCurrentY;
  //開始時的坐標和結束時的坐標（相對于自身控件的坐標）
  private int mStartX, mStartY, mStopX, mStopY;
  //判斷懸浮窗口是否移動，這里做個標記，防止移動后松手觸發(fā)了點擊事件
  private boolean isMove;
 
 
  @Override
  public void onCreate() {
    super.onCreate();
    initWindow();//設置懸浮窗基本參數(shù)（位置、寬高等）
 
  }
 
  @Nullable
  @Override
  public IBinder onBind(Intent intent) {
    currentBigUserId = intent.getStringExtra("localUserId");
    remoteUserId = intent.getStringExtra("remoteUserId");
    initFloating();//懸浮框點擊事件的處理
    return new MyBinder();
  }
 
  public class MyBinder extends Binder {
    public FloatWindowService getService() {
      return FloatWindowService.this;
    }
  }
 
 
  @Override
  public int onStartCommand(Intent intent, int flags, int startId) {
    return super.onStartCommand(intent, flags, startId);
  }
 
  @Override
  public void onDestroy() {
    super.onDestroy();
    if (mFloatingLayout != null) {
      // 移除懸浮窗口
      mWindowManager.removeView(mFloatingLayout);
      mFloatingLayout = null;
    }
  }
 
  /**
   * 設置懸浮框基本參數(shù)（位置、寬高等）
   */
  private void initWindow() {
    mWindowManager = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
    //設置好懸浮窗的參數(shù)
    wmParams = getParams();
    // 懸浮窗默認顯示以左上角為起始坐標
    wmParams.gravity = Gravity.RIGHT | Gravity.TOP;
    //懸浮窗的開始位置，因為設置的是從右上角開始，所以屏幕左上角是x=屏幕最大值;y=0
    wmParams.x = 10;
    wmParams.y = 120;
    //得到容器，通過這個inflater來獲得懸浮窗控件
    inflater = LayoutInflater.from(getApplicationContext());
    // 獲取浮動窗口視圖所在布局
    mFloatingLayout = inflater.inflate(R.layout.dlg_floatview, null);
    // 添加懸浮窗的視圖
    mWindowManager.addView(mFloatingLayout, wmParams);
  }
 
 
  private WindowManager.LayoutParams getParams() {
    wmParams = new WindowManager.LayoutParams();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
      wmParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
    } else {
      wmParams.type = WindowManager.LayoutParams.TYPE_PHONE;
    }
    //設置可以顯示在狀態(tài)欄上
    wmParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
        WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR |
        WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
 
    //設置懸浮窗口長寬數(shù)據(jù)
    wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
    wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
    return wmParams;
  }
 
  //加載遠端視屏：在這對懸浮窗內內容做操作
  private void initFloating() {
    //將子View加載進懸浮窗View
    mMainView = mFloatingLayout.findViewById(R.id.trtc_video_view_layout_float);//懸浮窗父布局
    View mChildView = renderView.getChildView();//加載進懸浮窗的子View，這個VIew來自天轉過來的那個Activity里面的那個需要加載的View
    mMainView.addView(mChildView);//將需要懸浮顯示的Viewadd到mTXCloudVideoView中
    
    //懸浮框觸摸事件，設置懸浮框可拖動
    mTXCloudVideoView.setOnTouchListener(this::onTouch);
    //懸浮框點擊事件
    mTXCloudVideoView.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        //在這里實現(xiàn)點擊重新回到Activity
        Intent intent = 
        new Intent(FloatWindowService.this, RtcActivity.class);//從該service跳轉至該activity會將該activity從后臺喚醒，所以activity會走onReStart（）
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//從Service跳轉至RTCActivity，需要Intent.FLAG_ACTIVITY_NEW_TASK，不然會崩潰
        startActivity(intent);
      }
    });
 
  }
 
  //觸摸事件
  @Override
  public boolean onTouch(View v, MotionEvent event) {
    int action = event.getAction();
    switch (action) {
      case MotionEvent.ACTION_DOWN:
        isMove = false;
        mTouchStartX = (int) event.getRawX();
        mTouchStartY = (int) event.getRawY();
        mStartX = (int) event.getX();
        mStartY = (int) event.getY();
        break;
      case MotionEvent.ACTION_MOVE:
        mTouchCurrentX = (int) event.getRawX();
        mTouchCurrentY = (int) event.getRawY();
        wmParams.x += mTouchStartX - mTouchCurrentX;
        wmParams.y += mTouchCurrentY - mTouchStartY;
        ALog.dTag("FloatingListener() onTouch",mTouchCurrentX,mTouchStartX,mTouchCurrentY,mTouchStartY);
        mWindowManager.updateViewLayout(mFloatingLayout, wmParams);
 
        mTouchStartX = mTouchCurrentX;
        mTouchStartY = mTouchCurrentY;
        break;
      case MotionEvent.ACTION_UP:
        mStopX = (int) event.getX();
        mStopY = (int) event.getY();
        if (Math.abs(mStartX - mStopX) >= 1 || Math.abs(mStartY - mStopY) >= 1) {
          isMove = true;
        }
        break;
      default:
        break;
    }
    //如果是移動事件不觸發(fā)OnClick事件，防止移動的時候一放手形成點擊事件
    return isMove;
  }
 
}