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

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 ：

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：

<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。