android material design：popupmenu
android material design 引入的popupmenu类似过去的上下文菜单，但是更灵活。 如图所示：
现在给出实现上图popupmenu的代码。 本例是一个普通的button触发弹出popupmenu。
测试的mainactivity.java ：
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package zhangphil.materialdesign; import android.app.activity; import android.os.bundle; import android.support.v.widget.popupmenu; import android.view.menuitem; import android.view.view; import android.widget.button; import android.widget.toast; public class mainactivity extends activity { @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); final button button = (button) findviewbyid(r.id.button); button.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { showpopupmenu(button); } }); } private void showpopupmenu(view view) { // view当前popupmenu显示的相对view的位置 popupmenu popupmenu = new popupmenu(this, view); // menu布局 popupmenu.getmenuinflater().inflate(r.menu.main, popupmenu.getmenu()); // menu的item点击事件 popupmenu.setonmenuitemclicklistener(new popupmenu.onmenuitemclicklistener() { @override public boolean onmenuitemclick(menuitem item) { toast.maketext(getapplicationcontext(), item.gettitle(), toast.length_short).show(); return false; } }); // popupmenu关闭事件 popupmenu.setondismisslistener(new popupmenu.ondismisslistener() { @override public void ondismiss(popupmenu menu) { toast.maketext(getapplicationcontext(), "关闭popupmenu", toast.length_short).show(); } }); popupmenu.show(); } } package zhangphil.materialdesign;import android.app.activity;import android.os.bundle;import android.support.v7.widget.popupmenu;import android.view.menuitem;import android.view.view;import android.widget.button;import android.widget.toast;public class mainactivity extends activity { @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); final button button = (button) findviewbyid(r.id.button); button.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { showpopupmenu(button); } }); } private void showpopupmenu(view view) { // view当前popupmenu显示的相对view的位置 popupmenu popupmenu = new popupmenu(this, view); // menu布局 popupmenu.getmenuinflater().inflate(r.menu.main, popupmenu.getmenu()); // menu的item点击事件 popupmenu.setonmenuitemclicklistener(new popupmenu.onmenuitemclicklistener() { @override public boolean onmenuitemclick(menuitem item) { toast.maketext(getapplicationcontext(), item.gettitle(), toast.length_short).show(); return false; } }); // popupmenu关闭事件 popupmenu.setondismisslistener(new popupmenu.ondismisslistener() { @override public void ondismiss(popupmenu menu) { toast.maketext(getapplicationcontext(), "关闭popupmenu", toast.length_short).show(); } }); popupmenu.show(); }} |
mainactivity.java需要的activity_main布局文件只含一个普通的android button，在次不再赘述。
位于menu目录下的main.xml：
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<menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" > <item android:id="@+id/action_open" android:orderincategory=" android:title="打开" app:showasaction="never"/> <item android:id="@+id/action_new" android:orderincategory=" android:title="新建" app:showasaction="never"/> <item android:id="@+id/action_del" android:orderincategory=" android:title="删除" app:showasaction="never"/> </menu> |
以上内容给大家分享基于android实现点击某个按钮让菜单选项从按钮周围指定位置弹出的相关知识，希望大家喜欢。
