【Android】弹出菜单popupmenu

弹出菜单popupmenu就是点击某个组件时弹出的菜单。

Activity类：

 
  
package com.zzj.ui.popupmenudemo;  
  
import android.app.Activity;  
import android.os.Bundle;  
import android.view.Menu;  
import android.view.MenuInflater;  
import android.view.MenuItem;  
import android.view.View;  
import android.widget.PopupMenu;  
import android.widget.PopupMenu.OnMenuItemClickListener;  
import android.widget.Toast;  
  
import com.zzj.ui.R;  
  
public class PopupMenuActivity extends Activity {  
    PopupMenu popupMenu;  
    Menu menu;  
  
@Override  
protected void onCreate(Bundle savedInstanceState) {  
super.onCreate(savedInstanceState);  
  
        setContentView(R.layout.popupmenu_activity);  
  
new PopupMenu(this, findViewById(R.id.popupmenu_btn));  
        menu = popupMenu.getMenu();  
  
// 通过代码添加菜单项  
0, 0, "复制");  
1, 1, "粘贴");  
  
// 通过XML文件添加菜单项  
        MenuInflater menuInflater = getMenuInflater();  
        menuInflater.inflate(R.menu.popupmenu, menu);  
  
// 监听事件  
new OnMenuItemClickListener() {  
  
@Override  
public boolean onMenuItemClick(MenuItem item) {  
switch (item.getItemId()) {  
case R.id.news:  
this, "新建",  
                            Toast.LENGTH_LONG).show();  
break;  
case R.id.open:  
this, "打开",  
                            Toast.LENGTH_LONG).show();  
break;  
case Menu.FIRST + 0:  
this, "复制",  
                            Toast.LENGTH_LONG).show();  
break;  
case Menu.FIRST + 1:  
this, "粘贴",  
                            Toast.LENGTH_LONG).show();  
break;  
default:  
break;  
                }  
return false;  
            }  
        });  
    }  
  
public void popupmenu(View v) {  
        popupMenu.show();  
    }  
}

Activity布局文件：

 
  
<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
android:layout_width="match_parent"  
android:layout_height="match_parent"  
android:orientation="vertical" >  
  
<Button  
android:id="@+id/popupmenu_btn"  
android:layout_width="wrap_content"  
android:layout_height="wrap_content"  
android:onClick="popupmenu"  
android:text="弹出菜单" />  
  
</LinearLayout>

popupmenu布局文件：

 
  
<?xml version="1.0" encoding="utf-8"?>  
<menu xmlns:android="http://schemas.android.com/apk/res/android" >  
  
<item  
android:id="@+id/news"  
android:title="新建"/>  
<item  
android:id="@+id/open"  
android:title="打开"/>  
  
</menu>

效果：