MainActivity.java

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/*
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 * Copyright (C) 2013 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.example.android.actionbarcompat.basic;
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import android.os.Bundle;
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import android.support.v4.view.MenuItemCompat;
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import android.support.v7.app.ActionBarActivity;
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import android.view.Menu;
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import android.view.MenuItem;
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/**
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 * This sample shows you how to use ActionBarCompat to create a basic Activity which displays
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 * action items. It covers inflating items from a menu resource, as well as adding an item in code.
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 *
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 * This Activity extends from {@link ActionBarActivity}, which provides all of the function
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 * necessary to display a compatible Action Bar on devices running Android v2.1+.
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 */
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public class MainActivity extends ActionBarActivity {
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    @Override
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    protected void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        setContentView(R.layout.sample_main);
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    }
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    /**
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     * Use this method to instantiate your menu, and add your items to it. You
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     * should return true if you have added items to it and want the menu to be displayed.
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     */
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    @Override
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    public boolean onCreateOptionsMenu(Menu menu) {
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        // Inflate our menu from the resources by using the menu inflater.
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        getMenuInflater().inflate(R.menu.main, menu);
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        // It is also possible add items here. Use a generated id from
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        // resources (ids.xml) to ensure that all menu ids are distinct.
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        MenuItem locationItem = menu.add(0, R.id.menu_location, 0, R.string.menu_location);
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        locationItem.setIcon(R.drawable.ic_action_location);
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        // Need to use MenuItemCompat methods to call any action item related methods
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        MenuItemCompat.setShowAsAction(locationItem, MenuItem.SHOW_AS_ACTION_IF_ROOM);
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        return true;
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    }
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    /**
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     * This method is called when one of the menu items to selected. These items
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     * can be on the Action Bar, the overflow menu, or the standard options menu. You
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     * should return true if you handle the selection.
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     */
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    @Override
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    public boolean onOptionsItemSelected(MenuItem item) {
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        switch (item.getItemId()) {
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            case R.id.menu_refresh:
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                // Here we might start a background refresh task
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                return true;
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            case R.id.menu_location:
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                // Here we might call LocationManager.requestLocationUpdates()
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                return true;
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            case R.id.menu_settings:
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                // Here we would open up our settings activity
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                return true;
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        }
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        return super.onOptionsItemSelected(item);
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    }
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}