1 /*
2  * Copyright (C) 2017 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 package com.android.settings.connecteddevice;
17 
18 import android.content.Context;
19 import android.content.pm.PackageManager;
20 
21 import androidx.annotation.VisibleForTesting;
22 import androidx.preference.Preference;
23 import androidx.preference.PreferenceGroup;
24 import androidx.preference.PreferenceScreen;
25 
26 import com.android.settings.bluetooth.BluetoothDeviceUpdater;
27 import com.android.settings.bluetooth.ConnectedBluetoothDeviceUpdater;
28 import com.android.settings.connecteddevice.dock.DockUpdater;
29 import com.android.settings.connecteddevice.usb.ConnectedUsbDeviceUpdater;
30 import com.android.settings.core.BasePreferenceController;
31 import com.android.settings.core.PreferenceControllerMixin;
32 import com.android.settings.dashboard.DashboardFragment;
33 import com.android.settings.overlay.DockUpdaterFeatureProvider;
34 import com.android.settings.overlay.FeatureFactory;
35 import com.android.settingslib.core.lifecycle.LifecycleObserver;
36 import com.android.settingslib.core.lifecycle.events.OnStart;
37 import com.android.settingslib.core.lifecycle.events.OnStop;
38 
39 /**
40  * Controller to maintain the {@link androidx.preference.PreferenceGroup} for all
41  * connected devices. It uses {@link DevicePreferenceCallback} to add/remove {@link Preference}
42  */
43 public class ConnectedDeviceGroupController extends BasePreferenceController
44         implements PreferenceControllerMixin, LifecycleObserver, OnStart, OnStop,
45         DevicePreferenceCallback {
46 
47     private static final String KEY = "connected_device_list";
48 
49     @VisibleForTesting
50     PreferenceGroup mPreferenceGroup;
51     private BluetoothDeviceUpdater mBluetoothDeviceUpdater;
52     private ConnectedUsbDeviceUpdater mConnectedUsbDeviceUpdater;
53     private DockUpdater mConnectedDockUpdater;
54 
ConnectedDeviceGroupController(Context context)55     public ConnectedDeviceGroupController(Context context) {
56         super(context, KEY);
57     }
58 
59     @Override
onStart()60     public void onStart() {
61         mBluetoothDeviceUpdater.registerCallback();
62         mConnectedUsbDeviceUpdater.registerCallback();
63         mConnectedDockUpdater.registerCallback();
64         mBluetoothDeviceUpdater.refreshPreference();
65     }
66 
67     @Override
onStop()68     public void onStop() {
69         mConnectedUsbDeviceUpdater.unregisterCallback();
70         mBluetoothDeviceUpdater.unregisterCallback();
71         mConnectedDockUpdater.unregisterCallback();
72     }
73 
74     @Override
displayPreference(PreferenceScreen screen)75     public void displayPreference(PreferenceScreen screen) {
76         super.displayPreference(screen);
77 
78         mPreferenceGroup = screen.findPreference(KEY);
79         mPreferenceGroup.setVisible(false);
80 
81         if (isAvailable()) {
82             final Context context = screen.getContext();
83             mBluetoothDeviceUpdater.setPrefContext(context);
84             mBluetoothDeviceUpdater.forceUpdate();
85             mConnectedUsbDeviceUpdater.initUsbPreference(context);
86             mConnectedDockUpdater.setPreferenceContext(context);
87             mConnectedDockUpdater.forceUpdate();
88         }
89     }
90 
91     @Override
getAvailabilityStatus()92     public int getAvailabilityStatus() {
93         final PackageManager packageManager = mContext.getPackageManager();
94         return (packageManager.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)
95                 || packageManager.hasSystemFeature(PackageManager.FEATURE_USB_ACCESSORY)
96                 || packageManager.hasSystemFeature(PackageManager.FEATURE_USB_HOST)
97                 || mConnectedDockUpdater != null)
98                 ? AVAILABLE_UNSEARCHABLE
99                 : UNSUPPORTED_ON_DEVICE;
100     }
101 
102     @Override
getPreferenceKey()103     public String getPreferenceKey() {
104         return KEY;
105     }
106 
107     @Override
onDeviceAdded(Preference preference)108     public void onDeviceAdded(Preference preference) {
109         if (mPreferenceGroup.getPreferenceCount() == 0) {
110             mPreferenceGroup.setVisible(true);
111         }
112         mPreferenceGroup.addPreference(preference);
113     }
114 
115     @Override
onDeviceRemoved(Preference preference)116     public void onDeviceRemoved(Preference preference) {
117         mPreferenceGroup.removePreference(preference);
118         if (mPreferenceGroup.getPreferenceCount() == 0) {
119             mPreferenceGroup.setVisible(false);
120         }
121     }
122 
123     @VisibleForTesting
init(BluetoothDeviceUpdater bluetoothDeviceUpdater, ConnectedUsbDeviceUpdater connectedUsbDeviceUpdater, DockUpdater connectedDockUpdater)124     public void init(BluetoothDeviceUpdater bluetoothDeviceUpdater,
125             ConnectedUsbDeviceUpdater connectedUsbDeviceUpdater,
126             DockUpdater connectedDockUpdater) {
127 
128         mBluetoothDeviceUpdater = bluetoothDeviceUpdater;
129         mConnectedUsbDeviceUpdater = connectedUsbDeviceUpdater;
130         mConnectedDockUpdater = connectedDockUpdater;
131     }
132 
init(DashboardFragment fragment)133     public void init(DashboardFragment fragment) {
134         final Context context = fragment.getContext();
135         DockUpdaterFeatureProvider dockUpdaterFeatureProvider =
136                 FeatureFactory.getFactory(context).getDockUpdaterFeatureProvider();
137         final DockUpdater connectedDockUpdater =
138                 dockUpdaterFeatureProvider.getConnectedDockUpdater(context, this);
139         init(new ConnectedBluetoothDeviceUpdater(context, fragment, this),
140                 new ConnectedUsbDeviceUpdater(context, fragment, this),
141                 connectedDockUpdater);
142     }
143 }
144