1/*
2 * Copyright (C) 2011 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
17package com.example.android.supportv7.app;
18
19import com.example.android.supportv7.R;
20
21import android.content.Context;
22import android.content.Intent;
23import android.provider.Settings;
24import android.support.v4.view.ActionProvider;
25import android.support.v7.app.AppCompatActivity;
26import android.view.LayoutInflater;
27import android.view.Menu;
28import android.view.MenuItem;
29import android.view.View;
30import android.widget.ImageButton;
31import android.widget.Toast;
32
33/**
34 * This activity demonstrates how to implement an {@link android.view.ActionProvider}
35 * for adding functionality to the Action Bar. In particular this demo creates an
36 * ActionProvider for launching the system settings and adds a menu item with that
37 * provider.
38 */
39public class ActionBarSettingsActionProviderActivity extends AppCompatActivity {
40    @Override
41    public boolean onCreateOptionsMenu(Menu menu) {
42        super.onCreateOptionsMenu(menu);
43        getMenuInflater().inflate(R.menu.action_bar_settings_action_provider, menu);
44        return true;
45    }
46
47    @Override
48    public boolean onOptionsItemSelected(MenuItem item) {
49        // If this callback does not handle the item click, onPerformDefaultAction
50        // of the ActionProvider is invoked. Hence, the provider encapsulates the
51        // complete functionality of the menu item.
52        Toast.makeText(this, R.string.action_bar_settings_action_provider_no_handling,
53                Toast.LENGTH_SHORT).show();
54        return false;
55    }
56
57    public static class SettingsActionProvider extends ActionProvider {
58        /** An intent for launching the system settings. */
59        private static final Intent sSettingsIntent = new Intent(Settings.ACTION_SETTINGS);
60
61        /**
62         * Creates a new instance.
63         *
64         * @param context Context for accessing resources.
65         */
66        public SettingsActionProvider(Context context) {
67            super(context);
68        }
69
70        @Override
71        public View onCreateActionView() {
72            // Inflate the action view to be shown on the action bar.
73            LayoutInflater layoutInflater = LayoutInflater.from(getContext());
74            View view = layoutInflater.inflate(R.layout.action_bar_settings_action_provider, null);
75            ImageButton button = (ImageButton) view.findViewById(R.id.button);
76            // Attach a click listener for launching the system settings.
77            button.setOnClickListener(new View.OnClickListener() {
78                @Override
79                public void onClick(View v) {
80                    getContext().startActivity(sSettingsIntent);
81                }
82            });
83            return view;
84        }
85
86        @Override
87        public boolean onPerformDefaultAction() {
88            // This is called if the host menu item placed in the overflow menu of the
89            // action bar is clicked and the host activity did not handle the click.
90            getContext().startActivity(sSettingsIntent);
91            return true;
92        }
93    }
94}
95