menu

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

    <item android:title="删除"
        android:id="@+id/delete"/>
</menu>

package com.pingyijinren.helloworld.activity;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import com.pingyijinren.helloworld.R;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main,menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch(item.getItemId()){
            case R.id.add:
                Log.d("MainActivity","add");
                break;

            case R.id.delete:
                Log.d("MainActivity","delete");
                break;
        }
        return true;
    }
}