public void showAddressTip(String number) {

   // TN的構造方法（參考Toast的原始碼）
      final LayoutParams params = new WindowManager.LayoutParams();
      // 設定寬高為WrapContent
      params.height = WindowManager.LayoutParams.WRAP_CONTENT;
      params.width = WindowManager.LayoutParams.WRAP_CONTENT;
      // 半透明
      params
 
.format = PixelFormat.TRANSLUCENT;
      // 型別為Toast
      // TYPE_PRIORITY_PHONE 優先於通話介面許可權:android.permission.SYSTEM_ALERT_WINDOW
      // Android保護機制: 在通話的時候,通話介面優先順序最高其他介面都不可被觸控
      params.type = WindowManager.LayoutParams.TYPE_PRIORITY_PHONE;
      params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON // 保持螢幕常量
 

           | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; // 不可獲取焦點
                                                // 焦點和觸控事件沒有任何關係
      // |WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE; //客官不可摸

      // 載入佈局
      final TextView tvAddress = (TextView) View.inflate(MyServicer.this,
           R.layout.tip_address, null
 
);
      // 設定內容
      tvAddress.setText(number);

      tvAddress.setBackgroundResource(android.R.color.holo_green_light);

      // 獲取WindowManager
      final WindowManager mWm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
      // 通過WindowManager新增一個控制元件最終控制元件會顯示在Window上
      mWm.addView(tvAddress, params);

      tvAddress.setOnTouchListener(new OnTouchListener() {

        private int downX;
        private int downY;

        @Override
        public boolean onTouch(View v, MotionEvent event) {
           switch (event.getAction()) {
           case MotionEvent.ACTION_DOWN:
              Log.i("test", "down");
              // 獲取當前點選下去的位置
              downX = (int) event.getRawX();
              downY = (int) event.getRawY();
              break;
           case MotionEvent.ACTION_MOVE:
              Log.i("test", "move");

              // 獲取X和Y的偏移量
              int moveX = (int) event.getRawX();
              int moveY = (int) event.getRawY();

              // 計算差值
              int dx = moveX - downX;
              int dy = moveY - downY;

              // 在原來的基礎上加上現在移動的差值
              params.x = params.x + dx;
              params.y = params.y + dy;

              // 更新控制元件引數佈局
              mWm.updateViewLayout(tvAddress, params);

              downX = moveX;
              downY = moveY;
              break;
           case MotionEvent.ACTION_UP:
              Log.i("test", "up");
              break;

           default:
              break;
           }
           return false;
        }
      });
   }