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点击事件是一系列动作的组合；

private View view;    private WindowManager wm;

//自定义toast土司    private void toast(String address) {        wm = (WindowManager) getSystemService(WINDOW_SERVICE);        //用代码创建的view//        view = new TextView(getApplicationContext());//        view.setText(address);//        view.setTextSize(22);//        view.setTextColor(Color.RED);//用xml创建的view        final View view = View.inflate(this, R.layout.addressshowbackground, null);        TextView tv = view.findViewById(R.id.tv_addressback);        //设置触摸事件监听        view.setOnTouchListener(new View.OnTouchListener() {            private int startY;            private int startX;            @Override            public boolean onTouch(View v, MotionEvent event) {                int action = event.getAction();//获取当前事件的类型                switch (action) {                    case MotionEvent.ACTION_DOWN://按下                        //获取开始位置                        startX = (int) event.getX();                        startY = (int) event.getY();                        break;                    case MotionEvent.ACTION_MOVE://移动                        //获取结束的位置                        int endX = (int) event.getX();                        int endY = (int) event.getY();                        //手指的偏移量                        int dx = endX - startX;                        int dy = endY - startY;                        params.x+=dx;                        params.y+=dy;                        // 考到边界问题                        if(params.x<0){                            params.x=0;                        }else if(params.y<0){                            params.y=0;                        }else if(params.x>(wm.getDefaultDisplay().getWidth()-view.getWidth())){params.x=wm.getDefaultDisplay().getWidth()-view.getWidth();                        }else if(params.y>(wm.getDefaultDisplay().getHeight()-view.getHeight()){                            params.y=wm.getDefaultDisplay().getHeight()-view.getHeight();                        }                        wm.updateViewLayout(view,params);//更新布局                        //再次显示到imagev上，                        //更新一下开始的坐标                        startX = endX;                        startY = endY;                        break;                    case MotionEvent.ACTION_UP://抬起//保存endX和endY                        break;                    case MotionEvent.ACTION_CANCEL://取消                        break;                }                return true;//监听器处理完事件了，不要让父控件或父布局相应事件            }        });        view.setBackgroundResource(R.drawable.ic_launcher_background);//设置背景        tv.setText(address);        //设置窗体的参数        params = new WindowManager.LayoutParams();        params.height = WindowManager.LayoutParams.WRAP_CONTENT;        params.width = WindowManager.LayoutParams.WRAP_CONTENT;        params.gravity= Gravity.TOP+Gravity.LEFT;//土司的位置在左上        params.x=100;        params.y=100;        params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;        params.format = PixelFormat.TRANSLUCENT;//        params.type = WindowManager.LayoutParams.TYPE_TOAST;        params.type = WindowManager.LayoutParams.TYPE_PRIORITY_PHONE;//具有电话优先级的窗体，如果要能获的手势使劲按，就要用这个,还要添加系统的权限        wm.addView(view, params);    }

wm.removeView(view);//移除窗体上的view

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