1 /*
2  * Copyright (C) 2023 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.android.settings.accessibility;
18 
19 import android.content.Context;
20 
21 import androidx.preference.Preference;
22 import androidx.preference.PreferenceScreen;
23 
24 import com.android.settings.bluetooth.BluetoothDeviceUpdater;
25 import com.android.settings.connecteddevice.DevicePreferenceCallback;
26 import com.android.settings.dashboard.DashboardFragment;
27 import com.android.settingslib.core.lifecycle.LifecycleObserver;
28 import com.android.settingslib.core.lifecycle.events.OnResume;
29 import com.android.settingslib.core.lifecycle.events.OnStart;
30 import com.android.settingslib.core.lifecycle.events.OnStop;
31 
32 /**
33  * Controller to update the {@link androidx.preference.PreferenceCategory} for all
34  * saved ((bonded but not connected)) hearing devices, including ASHA and HAP profile.
35  * Parent class {@link BaseBluetoothDevicePreferenceController} will use
36  * {@link DevicePreferenceCallback} to add/remove {@link Preference}.
37  */
38 public class SavedHearingDevicePreferenceController extends
39         BaseBluetoothDevicePreferenceController implements LifecycleObserver, OnStart, OnResume,
40         OnStop {
41 
42     private BluetoothDeviceUpdater mSavedHearingDeviceUpdater;
43 
SavedHearingDevicePreferenceController(Context context, String preferenceKey)44     public SavedHearingDevicePreferenceController(Context context,
45             String preferenceKey) {
46         super(context, preferenceKey);
47     }
48 
49     /**
50      * Initializes objects in this controller. Need to call this before onStart().
51      *
52      * <p>Should not call this more than 1 time.
53      *
54      * @param fragment The {@link DashboardFragment} uses the controller.
55      */
init(DashboardFragment fragment)56     public void init(DashboardFragment fragment) {
57         if (mSavedHearingDeviceUpdater != null) {
58             throw new IllegalStateException("Should not call init() more than 1 time.");
59         }
60         mSavedHearingDeviceUpdater = new SavedHearingDeviceUpdater(fragment.getContext(), this,
61                 fragment.getMetricsCategory());
62     }
63 
64     @Override
onStart()65     public void onStart() {
66         mSavedHearingDeviceUpdater.registerCallback();
67     }
68 
69     @Override
onResume()70     public void onResume() {
71         mSavedHearingDeviceUpdater.refreshPreference();
72     }
73 
74     @Override
onStop()75     public void onStop() {
76         mSavedHearingDeviceUpdater.unregisterCallback();
77     }
78 
79     @Override
displayPreference(PreferenceScreen screen)80     public void displayPreference(PreferenceScreen screen) {
81         super.displayPreference(screen);
82 
83         if (isAvailable()) {
84             final Context context = screen.getContext();
85             mSavedHearingDeviceUpdater.setPrefContext(context);
86             mSavedHearingDeviceUpdater.forceUpdate();
87         }
88     }
89 }
90