1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License. You may obtain a copy of
6  * the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations under
14  * the License.
15  */
16 
17 package com.android.deskclock.actionbarmenu;
18 
19 import android.app.Activity;
20 import android.view.Menu;
21 import android.view.MenuItem;
22 
23 /**
24  * {@link MenuItemController} for handling navigation up button in actionbar. It is a special
25  * menu item because it's not inflated through menu.xml, and has its own predefined id.
26  */
27 public final class NavUpMenuItemController implements MenuItemController {
28 
29     private final Activity mActivity;
30 
NavUpMenuItemController(Activity activity)31     public NavUpMenuItemController(Activity activity) {
32         mActivity = activity;
33     }
34 
35     @Override
getId()36     public int getId() {
37         return android.R.id.home;
38     }
39 
40     @Override
onCreateOptionsItem(Menu menu)41     public void onCreateOptionsItem(Menu menu) {
42         // "Home" option is automatically created by the Toolbar.
43     }
44 
45     @Override
onPrepareOptionsItem(MenuItem item)46     public void onPrepareOptionsItem(MenuItem item) {
47     }
48 
49     @Override
onOptionsItemSelected(MenuItem item)50     public boolean onOptionsItemSelected(MenuItem item) {
51         mActivity.finish();
52         return true;
53     }
54 }
55