<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
  <item
    android:icon="@drawable/ic_launcher"
    android:title="File">
    <menu>
      <group android:id="@+id/noncheckable_group" >
        <item
          android:id="@+id/newFile"
          android:alphabeticShortcut="n"
          android:title="New"/>
        <item
          android:id="@+id/openFile"
          android:alphabeticShortcut="o"
          android:title="Open"/>
        <item
          android:id="@+id/saveFile"
          android:alphabeticShortcut="s"
          android:title="Save"/>
      </group>
    </menu>
  </item>
</menu>

// 创建Menu
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    mi.inflate(R.menu.file_menu, menu);
    return true;
  }
  // Menu的点击事件
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.newFile:
      Toast.makeText(Menu_Resource.this, "点击了newFile", 800).show();
      break;
    case R.id.openFile:
      Toast.makeText(Menu_Resource.this, "点击了openFile", 800).show();
      break;
    case R.id.saveFile:
      Toast.makeText(Menu_Resource.this, "点击了saveFile", 800).show();
      break;
    }
    return true;
  }
  //onCreateOptionsMenu和onOptionsItemSelected方法为Acitivity中的