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 
17 package com.example.android.supportv7.app;
18 
19 import android.content.Context;
20 import android.content.Intent;
21 import android.provider.Settings;
22 import android.view.LayoutInflater;
23 import android.view.Menu;
24 import android.view.MenuItem;
25 import android.view.View;
26 import android.widget.ImageButton;
27 import android.widget.Toast;
28 
29 import androidx.appcompat.app.AppCompatActivity;
30 import androidx.core.view.ActionProvider;
31 
32 import com.example.android.supportv7.R;
33 
34 /**
35  * This activity demonstrates how to implement an {@link android.view.ActionProvider}
36  * for adding functionality to the Action Bar. In particular this demo creates an
37  * ActionProvider for launching the system settings and adds a menu item with that
38  * provider.
39  */
40 public class ActionBarSettingsActionProviderActivity extends AppCompatActivity {
41     @Override
onCreateOptionsMenu(Menu menu)42     public boolean onCreateOptionsMenu(Menu menu) {
43         super.onCreateOptionsMenu(menu);
44         getMenuInflater().inflate(R.menu.action_bar_settings_action_provider, menu);
45         return true;
46     }
47 
48     @Override
onOptionsItemSelected(MenuItem item)49     public boolean onOptionsItemSelected(MenuItem item) {
50         // If this callback does not handle the item click, onPerformDefaultAction
51         // of the ActionProvider is invoked. Hence, the provider encapsulates the
52         // complete functionality of the menu item.
53         Toast.makeText(this, R.string.action_bar_settings_action_provider_no_handling,
54                 Toast.LENGTH_SHORT).show();
55         return false;
56     }
57 
58     public static class SettingsActionProvider extends ActionProvider {
59         /** An intent for launching the system settings. */
60         private static final Intent sSettingsIntent = new Intent(Settings.ACTION_SETTINGS);
61 
62         /**
63          * Creates a new instance.
64          *
65          * @param context Context for accessing resources.
66          */
SettingsActionProvider(Context context)67         public SettingsActionProvider(Context context) {
68             super(context);
69         }
70 
71         @Override
onCreateActionView()72         public View onCreateActionView() {
73             // Inflate the action view to be shown on the action bar.
74             LayoutInflater layoutInflater = LayoutInflater.from(getContext());
75             View view = layoutInflater.inflate(R.layout.action_bar_settings_action_provider, null);
76             ImageButton button = (ImageButton) view.findViewById(R.id.button);
77             // Attach a click listener for launching the system settings.
78             button.setOnClickListener(new View.OnClickListener() {
79                 @Override
80                 public void onClick(View v) {
81                     getContext().startActivity(sSettingsIntent);
82                 }
83             });
84             return view;
85         }
86 
87         @Override
onPerformDefaultAction()88         public boolean onPerformDefaultAction() {
89             // This is called if the host menu item placed in the overflow menu of the
90             // action bar is clicked and the host activity did not handle the click.
91             getContext().startActivity(sSettingsIntent);
92             return true;
93         }
94     }
95 }
96