PopupWindow的简单使用(结合RecyclerView)

时间:2023-03-10 00:51:34
PopupWindow的简单使用(结合RecyclerView)

Android弹窗:

在Android中弹出式菜单(以下称弹窗)是使用十分广泛一种菜单呈现的方式,弹窗为用户交互提供了便利。关于弹窗的实现大致有以下两种方式AlertDialogPopupWindow

两者的区别:AlertDialog弹窗在位置显示上是固定的,而PopupWindow则相对比较随意,能够在主屏幕上的任意位置显示; 
今天就简单介绍一下,如何利用PopupWindow实现RecyclerView的自定义的弹窗布局;

使用步骤:

1.创建两个xml文件,一个mainactivity主布局,一个是popupwindow布局(因为我是在项目里写的,所以闲杂代码可能比较多):

主布局(在其写一个Button按钮,因为项目需要,我换成了ImageView):

<LinearLayout
android:id="@+id/score_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:background="#f0f0f0"> <ImageView
android:id="@+id/bttest"
android:layout_width="50dp"
android:layout_height="match_parent"
android:layout_gravity="center"
android:src="@mipmap/selectteam" /> </LinearLayout>

popupwindow.xml布局(里面放一个RecyclerView):

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"> <android.support.v7.widget.RecyclerView
android:id="@+id/select"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|enterAlways|snap"> </android.support.v7.widget.RecyclerView> </LinearLayout>

2.在MainActivity中为ImageView进行实例化,并为其设立点击事件:

    bselect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showPopupWindow();
}
});
private void showPopupWindow() {
View view = LayoutInflater.from(getContext()).inflate(R.layout.popupwindow,null);
RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.select);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(linearLayoutManager);
ScoreTeamAdapter scoreTeamAdapter = new ScoreTeamAdapter(yearList);
recyclerView.setAdapter(scoreTeamAdapter);
popupWindow = new PopupWindow(main_layout, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
popupWindow.setContentView(view);
popupWindow.setFocusable(true);
popupWindow.showAsDropDown(bselect);
}

showPopupWindow()方法:

1.先将popupwindow.xml布局加载成一个View,并通过该View将RecyclerView进行实例化,然后RecyclerView进行设置,在这设置成竖向排列的线性布局,然后为其设置一个Adapter;

2.随后将popupWindow进行设置:

popupWindow = new PopupWindow(main_layout, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);

main_layout是ImageView的父容器LinearLayout, 
第一个ViewGroup.LayoutParams.WRAP_CONTENT是设置popupwindow的宽度,第二个ViewGroup.LayoutParams.WRAP_CONTENT是设置popupwindow的高度;

popupWindow.setContentView(view);

设置popupwindow的布局;

popupWindow.showAsDropDown(bselect);

调用PopupWindow的showAsDropDown(View view)将PopupWindow作为View组件的下拉组件显示出来;或调用PopupWindow的showAtLocation()方法将PopupWindow在指定位置显示出来;

最后的效果如图: 
PopupWindow的简单使用(结合RecyclerView)

想了解更多PopupWindow的用法,请看下面的简书: 
http://www.jianshu.com/p/825d1cc9fa79