MainActivity.java

package com.applite.menures;

import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;


public class MainActivity extends Activity {

	
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    //菜单事件
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
        	new AlertDialog.Builder(this).setTitle("我是标题").setMessage("我是内容那个").setPositiveButton("关闭", null).show();
            //return true;
        }
        else if(id==R.id.menuShowItemShowToast)
        {
        	Toast.makeText(this, "哈哈 menuitem", Toast.LENGTH_SHORT).show();
        }
        return super.onOptionsItemSelected(item);
    }
}