（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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