此篇博客实现的功能是:点击界面中的图片,跳出一个PopupWindow,PopupWindow中含有相应的文字和图标,并且在显示PopupWindow的时候,背景为半透明。
看图描述:点击加号,跳出PopupWindow,其中包含三个图片,点击叉号PopupWindow消失;当PopupWindow显示的时候,背景为半透明
显示PopupWindow的代码
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
private void showPopupWindow() { View view = (LinearLayout) getLayoutInflater().inflate(R.layout.popup_window_layout, null ); ImageView ivP = (ImageView) view.findViewById(R.id.ivP); ImageView ivX = (ImageView) view.findViewById(R.id.ivX); ImageView ivClose = (ImageView) view.findViewById(R.id.ivClose); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); ivP.setLayoutParams(params); ivX.setLayoutParams(params); ivClose.setLayoutParams(params); ivClose.setOnClickListener( this ); popupWindow = new PopupWindow(WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT); popupWindow.setContentView(view); popupWindow.setFocusable( true ); popupWindow.setTouchable( true ); popupWindow.setOutsideTouchable( false ); popupWindow.showAsDropDown(ivAdd, 0 , 0 ); backgroundAlpha( 0 .4f); } |
1
2
3
4
5
|
private void backgroundAlpha( float f) { WindowManager.LayoutParams lp =getWindow().getAttributes(); lp.alpha = f; getWindow().setAttributes(lp); } |
backgroundAlpha()方法用于设置PopupWindow显示后的背景半透明,参数 f 的范围是0.0~1.0,数值越大透明度越高。
源码下载
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/carter_yu/article/details/50687982?utm_source=blogxgwz1