Android实现类似qq微信消息悬浮窗通知功能

manager=(NotificationManager)getSystemService(NOTIFICATION_SERVICE); notification = new NotificationCompat.Builder(this) .setVisibility(Notification.VISIBILITY_PRIVATE) .setSmallIcon(R.mipmap.ic_launcher) .setLargeIcon(BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher)) .setFullScreenIntent(pendingIntent, false) .setContentTitle("标题") .setContentText("内容") .build(); manager.notify(1, notification);

``private void initWindowManager(){
 wm = (WindowManager) getApplicationContext().getSystemService(
     Context.WINDOW_SERVICE);
 params = new WindowManager.LayoutParams();
 // 设置window type
 params.type = WindowManager.LayoutParams.TYPE_PHONE;
 /*
  * 如果设置为params.type = WindowManager.LayoutParams.TYPE_PHONE; 那么优先级会降低一些,
  * 即拉下通知栏不可见
  */
 params.format = PixelFormat.RGBA_8888; // 设置图片格式，效果为背景透明
 // 设置Window flag
 params.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
     | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
     | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
 /*
  * 下面的flags属性的效果形同“锁定”。 悬浮窗不可触摸，不接受任何事件,同时不影响后面的事件响应。
  * wmParams.flags=LayoutParams.FLAG_NOT_TOUCH_MODAL |
  * LayoutParams.FLAG_NOT_FOCUSABLE | LayoutParams.FLAG_NOT_TOUCHABLE;
  */
 // 设置悬浮窗的长得宽
 params.width = wm.getDefaultDisplay().getWidth();
 params.height = 200;
 params.gravity = Gravity.LEFT | Gravity.TOP;}
private void createFloatView(String str) {
 if (btn_floatView == null){
   btn_floatView = new Button(getApplicationContext());
   wmTag = true;
 }
 btn_floatView.setText(str);
 Log.i(TAG, "createFloatView: "+str);
 // 设置悬浮窗的Touch监听
 btn_floatView.setOnTouchListener(new View.OnTouchListener() {
   int lastX, lastY;
   int paramX, paramY;
   public boolean onTouch(View v, MotionEvent event) {
     switch (event.getAction())
     {
       case MotionEvent.ACTION_DOWN:
         if (MainActivity.lifeTag == 1) {
           Intent intent = new Intent(DataService.this, MainActivity.class);
           startActivity(intent);
         }
         wm.removeViewImmediate(btn_floatView);
         btn_floatView = null;
         break;
       case MotionEvent.ACTION_MOVE:
         break;
     }
     return true;
   }
 });
 if (wmTag){
   wm.addView(btn_floatView, params);
   wmTag = false;
 }else {
   wm.updateViewLayout(btn_floatView,params);
 } }```