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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of 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,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.actionbarcompat.basic;
     18 
     19 import android.os.Bundle;
     20 import android.support.v4.view.MenuItemCompat;
     21 import android.support.v7.app.ActionBarActivity;
     22 import android.view.Menu;
     23 import android.view.MenuItem;
     24 
     25 /**
     26  * This sample shows you how to use ActionBarCompat to create a basic Activity which displays
     27  * action items. It covers inflating items from a menu resource, as well as adding an item in code.
     28  *
     29  * This Activity extends from {@link ActionBarActivity}, which provides all of the function
     30  * necessary to display a compatible Action Bar on devices running Android v2.1+.
     31  */
     32 public class MainActivity extends ActionBarActivity {
     33 
     34     @Override
     35     protected void onCreate(Bundle savedInstanceState) {
     36         super.onCreate(savedInstanceState);
     37         setContentView(R.layout.sample_main);
     38     }
     39 
     40     // BEGIN_INCLUDE(create_menu)
     41     /**
     42      * Use this method to instantiate your menu, and add your items to it. You
     43      * should return true if you have added items to it and want the menu to be displayed.
     44      */
     45     @Override
     46     public boolean onCreateOptionsMenu(Menu menu) {
     47         // Inflate our menu from the resources by using the menu inflater.
     48         getMenuInflater().inflate(R.menu.main, menu);
     49 
     50         // It is also possible add items here. Use a generated id from
     51         // resources (ids.xml) to ensure that all menu ids are distinct.
     52         MenuItem locationItem = menu.add(0, R.id.menu_location, 0, R.string.menu_location);
     53         locationItem.setIcon(R.drawable.ic_action_location);
     54 
     55         // Need to use MenuItemCompat methods to call any action item related methods
     56         MenuItemCompat.setShowAsAction(locationItem, MenuItem.SHOW_AS_ACTION_IF_ROOM);
     57 
     58         return true;
     59     }
     60     // END_INCLUDE(create_menu)
     61 
     62     // BEGIN_INCLUDE(menu_item_selected)
     63     /**
     64      * This method is called when one of the menu items to selected. These items
     65      * can be on the Action Bar, the overflow menu, or the standard options menu. You
     66      * should return true if you handle the selection.
     67      */
     68     @Override
     69     public boolean onOptionsItemSelected(MenuItem item) {
     70         switch (item.getItemId()) {
     71             case R.id.menu_refresh:
     72                 // Here we might start a background refresh task
     73                 return true;
     74 
     75             case R.id.menu_location:
     76                 // Here we might call LocationManager.requestLocationUpdates()
     77                 return true;
     78 
     79             case R.id.menu_settings:
     80                 // Here we would open up our settings activity
     81                 return true;
     82         }
     83 
     84         return super.onOptionsItemSelected(item);
     85     }
     86     // END_INCLUDE(menu_item_selected)
     87 }
     88