android中的menu和子menu小结

menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/Menu1"
android:title="Menu 1"
android:orderInCategory="1" />
<item android:id="@+id/Menu2"
android:orderInCategory="2"
android:title="Menu 2" />
<item android:id="@+id/Menu3"
android:orderInCategory="3"
android:title="Menu 3" />
<item android:id="@+id/submenu"
android:title="Sub menu"
android:orderInCategory="4">
<menu>
<item android:id="@+id/submenu1"
android:title="Sub menu 1" />
<item android:id="@+id/submenu2"
android:title="Sub menu 2" />
</menu>
</item>
</menu>
public class MenuActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public boolean onCreateOptionsMenu(Menu menu) {
new MenuInflater(getApplication())
.inflate(R.menu.menu, menu);
return(super.onPrepareOptionsMenu(menu));
}

public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.Menu1:
Toast.makeText(this, "Menu 1", Toast.LENGTH_SHORT).show();
break;
case R.id.Menu2:
Toast.makeText(this, "Menu 2", Toast.LENGTH_SHORT).show();
break;
case R.id.Menu3:
Toast.makeText(this, "Menu 3", Toast.LENGTH_SHORT).show();
break;
case R.id.submenu:
Toast.makeText(this, "Sub menu", Toast.LENGTH_SHORT).show();
break;
}
return(super.onOptionsItemSelected(item));
}
}

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