android 独立按键和菜单键 打开menu

话就不多说了

直接上代码

package com.example.menutest2;import android.os.Bundle;import android.app.Activity;import android.util.Log;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {Button button;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);           button=(Button)findViewById(R.id.button2);   button.setOnClickListener(new myOnClickListener());    }class myOnClickListener implements  OnClickListener{public void onClick(View arg0) {// TODO Auto-generated method stubopenOptionsMenu();}}@Overridepublic void openOptionsMenu() {// TODO Auto-generated method stubsuper.openOptionsMenu();}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// TODO Auto-generated method stubsuper.onCreateOptionsMenu(menu);int group1 = 1;int gourp2 = 2;menu.add(group1, 1, 1, "item 11");menu.add(group1, 2, 2, "item 12");menu.add(gourp2, 3, 3, "item 23");menu.add(gourp2, 4, 4, "item 24");return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// TODO Auto-generated method stubswitch (item.getItemId()) { // 响应每个菜单项(通过菜单项的ID)case 1: // do something hereLog.i("MenuTest:", "ItemSelected:1");break;case 2: // do something hereLog.i("MenuTest:", "ItemSelected:2");break;case 3: // do something hereLog.i("MenuTest:", "ItemSelected:3");break;case 4: // do something hereLog.i("MenuTest:", "ItemSelected:4");break;default: // 对没有处理的事件，交给父类来处理return super.onOptionsItemSelected(item);} // 返回true表示处理完菜单项的事件，不需要将该事件继续传播下去了return true;}//    @Override//    public boolean onCreateOptionsMenu(Menu menu) {//        getMenuInflater().inflate(R.menu.activity_main, menu);//        return true;//    }}

看上面的代码 没什么可说的

就是创建一个 按键 响应的时候调用：

openOptionsMenu();方法就可以了。当然如果menu 仍旧没有出现，可以参考我另外一篇博文：

android 没有出现menu 按键显示 解决
http://blog.csdn.net/penglijiang/article/details/7844514