android 通过 button 弹出menu

一android 通过 button 弹出 option menu：

public class TestOptionsMenu extends Activity implements OnClickListener{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        
        Button bt = (Button)findViewById(R.id.Button01);
        
        bt.setOnClickListener(this); 
    }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  
  menu.add(0, 0, 0, "test");
  return super.onCreateOptionsMenu(menu);
 }

 @Override
 public void openOptionsMenu() {
  // TODO Auto-generated method stub
  super.openOptionsMenu();
 }

 @Override
 public void onClick(View v) {
  int id = v.getId();
  switch(id){
  case R.id.Button01:
   openOptionsMenu(); //这里可以直接通过button调出按键menu的菜单
   break;
  }
  
 }
      
}

 

二，android 通过 button 弹出 context menu

1，获取button ： Button bt = (Button)findViewById(R.id.Button01);

2，设置button 事件:

bt.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {      
            public void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {  
                menu.setHeaderTitle("title");       
                menu.add(0, 1, 0, "item 1");    
                menu.add(0, 2, 0, "item 2");        

        }    
        });