andr菜单

Android 菜单
菜单分为两种：系统菜单和上下文菜单。

系统菜单按Menu键出现，通过Activity 的 onCreateOptionsMenu 来创建，onOptionsItemSelected 来响应

上下文菜单是长按控件时出现(如常见的输入法选择), 需为控件单独安装 OnCreateContextMenuListener,  响应则是统一由Activity中的onContextItemSelected 来完成;

public class MenuTest extends Activity {  
    EditText txtInput;  
    Button   btnOK;  
       
    public void onCreate(Bundle savedInstanceState){  
        super.onCreate(savedInstanceState);  
        this.setContentView(R.layout.menutest);  
          
        //控件初始化  
        txtInput = (EditText)this.findViewById(R.id.txtInput);  
        txtInput.setOnCreateContextMenuListener(contextMenuListener);//为控件安装上下文菜单  
          
        btnOK = (Button)this.findViewById(R.id.btnOK);  
        btnOK.setOnCreateContextMenuListener(contextMenuListener);  
    }  
  
    /* 
     * 创建系统菜单 
     * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu) 
     */  
    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        super.onCreateOptionsMenu(menu);  
          
        //从菜单资源中创建菜单  
        MenuInflater inflater = this.getMenuInflater();  
        inflater.inflate(R.menu.menu, menu);  
          
        return true;  
    }  
      
    /* 
     * 系统菜单响应 
     * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem) 
     */  
    @Override  
    public boolean onOptionsItemSelected(MenuItem item) {  
        switch(item.getItemId()){  
        case R.id.menuOpen:  
            Toast.makeText(this, "Open", 5).show();  
            break;  
        case R.id.menuSave:  
            Toast.makeText(this, "Save", 5).show();  
            break;    
        case R.id.menuExit:  
            this.finish();  
            break;        
        }  
          
        return super.onOptionsItemSelected(item);  
    }  
  
       
    /* 
     * 创建上下文菜单 
     */  
    OnCreateContextMenuListener contextMenuListener = new OnCreateContextMenuListener(){  
        public void onCreateContextMenu(ContextMenu menu, View v,  
                ContextMenuInfo menuInfo) {           
            MenuInflater inflater = MenuTest.this.getMenuInflater();  
            inflater.inflate(R.menu.context, menu);   
              
            //程序方式添加菜单  
            menu.setHeaderTitle("输入法选择");  
            menu.add(0, 0, 0, "自定义输入法");  
        }  
    };   
  
    /* 
     * 上下文菜单响应 
     * @see android.app.Activity#onContextItemSelected(android.view.MenuItem) 
     */  
    @Override  
    public boolean onContextItemSelected(MenuItem item) {  
        String message = String.format("您选择了%s!", item.getTitle());  
        Toast.makeText(this, message, 5).show();  
        return super.onContextItemSelected(item);  
    }  
}  

系统菜单 Menu.xml

<?xml version="1.0" encoding="utf-8"?>  
<menu  
  xmlns:android="http://schemas.android.com/apk/res/android">  
    <group android:id="@+id/menuGroupMain">  
        <item android:id="@+id/menuOpen" android:title="Open" android:orderInCategory="1"></item>  
        <item android:id="@+id/menuSave" android:title="Save" android:orderInCategory="5"></item>  
        <item android:id="@+id/menuExit" android:title="Exit" android:orderInCategory="3"></item>  
    </group>  
</menu>

上下文菜单 Context.xml

<?xml version="1.0" encoding="utf-8"?>  
<menu  
  xmlns:android="http://schemas.android.com/apk/res/android">  
    <group android:id="@+id/groupContext" android:checkableBehavior="single">  
        <item android:title="谷歌拼音" android:id="@+id/menuOption1" android:checkable="true"></item>  
        <item android:title="搜狗拼音" android:id="@+id/menuOption2" android:checkable="true"></item>  
        <item android:title="HTC手写" android:id="@+id/menuOption3" ></item>  
    </group>  
</menu>  

其它文档: http://kb.cnblogs.com/page/78304/