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.bluetooth.BluetoothProfile;
20 import android.content.Context;
21 
22 import androidx.fragment.app.FragmentManager;
23 import androidx.preference.Preference;
24 import androidx.preference.PreferenceScreen;
25 
26 import com.android.settings.bluetooth.BluetoothDeviceUpdater;
27 import com.android.settings.connecteddevice.DevicePreferenceCallback;
28 import com.android.settings.dashboard.DashboardFragment;
29 import com.android.settingslib.bluetooth.BluetoothCallback;
30 import com.android.settingslib.bluetooth.CachedBluetoothDevice;
31 import com.android.settingslib.bluetooth.LocalBluetoothManager;
32 import com.android.settingslib.core.lifecycle.LifecycleObserver;
33 import com.android.settingslib.core.lifecycle.events.OnStart;
34 import com.android.settingslib.core.lifecycle.events.OnStop;
35 
36 /**
37  * Controller to update the {@link androidx.preference.PreferenceCategory} for all
38  * connected hearing devices, including ASHA and HAP profile.
39  * Parent class {@link BaseBluetoothDevicePreferenceController} will use
40  * {@link DevicePreferenceCallback} to add/remove {@link Preference}.
41  */
42 public class AvailableHearingDevicePreferenceController extends
43         BaseBluetoothDevicePreferenceController implements LifecycleObserver, OnStart, OnStop,
44         BluetoothCallback {
45 
46     private static final String TAG = "AvailableHearingDevicePreferenceController";
47 
48     private BluetoothDeviceUpdater mAvailableHearingDeviceUpdater;
49     private final LocalBluetoothManager mLocalBluetoothManager;
50     private FragmentManager mFragmentManager;
51 
AvailableHearingDevicePreferenceController(Context context, String preferenceKey)52     public AvailableHearingDevicePreferenceController(Context context,
53             String preferenceKey) {
54         super(context, preferenceKey);
55         mLocalBluetoothManager = com.android.settings.bluetooth.Utils.getLocalBluetoothManager(
56                 context);
57     }
58 
59     /**
60      * Initializes objects in this controller. Need to call this before onStart().
61      *
62      * <p>Should not call this more than 1 time.
63      *
64      * @param fragment The {@link DashboardFragment} uses the controller.
65      */
init(DashboardFragment fragment)66     public void init(DashboardFragment fragment) {
67         if (mAvailableHearingDeviceUpdater != null) {
68             throw new IllegalStateException("Should not call init() more than 1 time.");
69         }
70         mAvailableHearingDeviceUpdater = new AvailableHearingDeviceUpdater(fragment.getContext(),
71                 this, fragment.getMetricsCategory());
72         mFragmentManager = fragment.getParentFragmentManager();
73     }
74 
75     @Override
onStart()76     public void onStart() {
77         mAvailableHearingDeviceUpdater.registerCallback();
78         mAvailableHearingDeviceUpdater.refreshPreference();
79         mLocalBluetoothManager.getEventManager().registerCallback(this);
80     }
81 
82     @Override
onStop()83     public void onStop() {
84         mAvailableHearingDeviceUpdater.unregisterCallback();
85         mLocalBluetoothManager.getEventManager().unregisterCallback(this);
86     }
87 
88     @Override
displayPreference(PreferenceScreen screen)89     public void displayPreference(PreferenceScreen screen) {
90         super.displayPreference(screen);
91 
92         if (isAvailable()) {
93             final Context context = screen.getContext();
94             mAvailableHearingDeviceUpdater.setPrefContext(context);
95             mAvailableHearingDeviceUpdater.forceUpdate();
96         }
97     }
98 
99     @Override
onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile)100     public void onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile) {
101         if (activeDevice == null) {
102             return;
103         }
104 
105         if (bluetoothProfile == BluetoothProfile.HEARING_AID) {
106             HearingAidUtils.launchHearingAidPairingDialog(mFragmentManager, activeDevice,
107                     getMetricsCategory());
108         }
109     }
110 }
111