Android弹出窗口

protected void PopUp()
    {
        final PopupWindow popup = new PopupWindow(TestActivity.this);
 
        View popView = LayoutInflater.from(TestActivity.this).inflate(R.layout.activity_show1, null);
 
        popup.setContentView(popView);
 
        popup.setFocusable(true);
 
        DisplayMetrics metric = new DisplayMetrics();
 
        getWindowManager().getDefaultDisplay().getMetrics(metric);
 
        int width = metric.widthPixels; // 屏幕宽度（像素）
 
        int height = metric.heightPixels; // 屏幕高度（像素）
 
        popup.setWidth(Integer.parseInt(new DecimalFormat("0").format(width * 0.8)));
 
        popup.setHeight(Integer.parseInt(new DecimalFormat("0").format(height * 0.8)));
 
        popup.showAtLocation(TestActivity.this.findViewById(R.id.textViewSync), Gravity.CENTER, 0, 0);
 
        popView.setOnClickListener(new View.OnClickListener() {
 
            @Override
 
            public void onClick(View v) {
 
                popup.dismiss();
 
            }
 
        });
    }