Android仿微信视屏悬浮窗效果

/**
   * 定义服务绑定的回调 开启视频通话服务连接
   */
  private ServiceConnection mVideoCallServiceConnection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      // 获取服务的操作对象
      FloatWindowService.MyBinder binder = (FloatWindowService.MyBinder) service;
      binder.getService();
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {

    }
  };

/*
   * 开启悬浮Video服务
   */
  private void startVideoService() {
    //最小化Activity
    moveTaskToBack(true);//将activity置于后台
    //开启服务显示悬浮框
    Intent serviceVideoIntent = new Intent(this, FloatWindowService.class);
    mServiceBound = bindService(serviceVideoIntent, mVideoCallServiceConnection, Context.BIND_AUTO_CREATE);//绑定Service
  }

//在onDestroy（）与onReStart（）中解绑并销毁相关内容
if (mServiceBound) {
      unbindService(mVideoCallServiceConnection);//解绑
      mServiceBound = false;
    }

/**
* 视频悬浮窗服务
*/
public class FloatWindowService extends Service implements View.OnTouchListener {
private WindowManager mWindowManager;
private WindowManager.LayoutParams wmParams;
private LayoutInflater inflater;
//浮动布局view
private View mFloatingLayout;
//容器父布局
private View mMainVIew;
//开始触控的坐标，移动时的坐标（相对于屏幕左上角的坐标）
private int mTouchStartX, mTouchStartY, mTouchCurrentX, mTouchCurrentY;
//开始时的坐标和结束时的坐标（相对于自身控件的坐标）
private int mStartX, mStartY, mStopX, mStopY;
//判断悬浮窗口是否移动，这里做个标记，防止移动后松手触发了点击事件
private boolean isMove;
@Override
public void onCreate() {
super.onCreate();
initWindow();//设置悬浮窗基本参数（位置、宽高等）
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
currentBigUserId = intent.getStringExtra("localUserId");
remoteUserId = intent.getStringExtra("remoteUserId");
initFloating();//悬浮框点击事件的处理
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) {
// 移除悬浮窗口
mWindowManager.removeView(mFloatingLayout);
mFloatingLayout = null;
}
}
/**
* 设置悬浮框基本参数（位置、宽高等）
*/
private void initWindow() {
mWindowManager = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
//设置好悬浮窗的参数
wmParams = getParams();
// 悬浮窗默认显示以左上角为起始坐标
wmParams.gravity = Gravity.RIGHT | Gravity.TOP;
//悬浮窗的开始位置，因为设置的是从右上角开始，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，通过这个inflater来获得悬浮窗控件
inflater = LayoutInflater.from(getApplicationContext());
// 获取浮动窗口视图所在布局
mFloatingLayout = inflater.inflate(R.layout.dlg_floatview, null);
// 添加悬浮窗的视图
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;
}
//设置可以显示在状态栏上
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;
//设置悬浮窗口长宽数据
wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
return wmParams;
}
//加载远端视屏：在这对悬浮窗内内容做操作
private void initFloating() {
//将子View加载进悬浮窗View
mMainView = mFloatingLayout.findViewById(R.id.trtc_video_view_layout_float);//悬浮窗父布局
View mChildView = renderView.getChildView();//加载进悬浮窗的子View，这个VIew来自天转过来的那个Activity里面的那个需要加载的View
mMainView.addView(mChildView);//将需要悬浮显示的Viewadd到mTXCloudVideoView中
//悬浮框触摸事件，设置悬浮框可拖动
mTXCloudVideoView.setOnTouchListener(this::onTouch);
//悬浮框点击事件
mTXCloudVideoView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//在这里实现点击重新回到Activity
Intent intent = 
new Intent(FloatWindowService.this, RtcActivity.class);//从该service跳转至该activity会将该activity从后台唤醒，所以activity会走onReStart（）
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//从Service跳转至RTCActivity，需要Intent.FLAG_ACTIVITY_NEW_TASK，不然会崩溃
startActivity(intent);
}
});
}
//触摸事件
@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;
}
//如果是移动事件不触发OnClick事件，防止移动的时候一放手形成点击事件
return isMove;
}
}