（1）在res--menu目录下的main.xml文件
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<item android:id="@+id/file" android:orderincategory="100" android:showasaction="always" android:title="文件(F)"> <menu> <item android:id="@+id/create" android:title="新建"> </item> <item android:id="@+id/open" android:title="打开"> </item> </menu> </item> <item android:id="@+id/edit" android:orderincategory="100" android:showasaction="always" android:title="编辑(E)"> <menu> <item android:id="@+id/create1" android:title="新建"> </item> <item android:id="@+id/open1" android:title="打开"> </item> </menu> </item> <item android:id="@+id/format" android:orderincategory="100" android:showasaction="always" android:title="格式(O)"> <menu> <item android:id="@+id/create2" android:title="新建"> </item> <item android:id="@+id/open2" android:title="打开"> </item> </menu> </item></menu> |
（2）类的文件
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package com.example.menu_showasaction;import android.os.Bundle;import android.app.Activity;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; } @Override public boolean onMenuItemSelected(int featureId, MenuItem item) { switch (item.getItemId()) { case R.id.create: Toast.makeText(MainActivity.this, "create...", Toast.LENGTH_SHORT); break; default: break; } return super.onMenuItemSelected(featureId, item); }} |
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