1 /* 2 * Copyright 2018 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.SavedBluetoothDeviceUpdater; 28 import com.android.settings.connecteddevice.dock.DockUpdater; 29 import com.android.settings.core.BasePreferenceController; 30 import com.android.settings.dashboard.DashboardFragment; 31 import com.android.settings.overlay.FeatureFactory; 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 public class PreviouslyConnectedDevicePreferenceController extends BasePreferenceController 37 implements LifecycleObserver, OnStart, OnStop, DevicePreferenceCallback { 38 39 private static final int MAX_DEVICE_NUM = 3; 40 41 private PreferenceGroup mPreferenceGroup; 42 private BluetoothDeviceUpdater mBluetoothDeviceUpdater; 43 private DockUpdater mSavedDockUpdater; 44 private int mPreferenceSize; 45 PreviouslyConnectedDevicePreferenceController(Context context, String preferenceKey)46 public PreviouslyConnectedDevicePreferenceController(Context context, String preferenceKey) { 47 super(context, preferenceKey); 48 49 mSavedDockUpdater = FeatureFactory.getFactory( 50 context).getDockUpdaterFeatureProvider().getSavedDockUpdater(context, this); 51 } 52 53 @Override getAvailabilityStatus()54 public int getAvailabilityStatus() { 55 return (mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH) 56 || mSavedDockUpdater != null) 57 ? AVAILABLE 58 : CONDITIONALLY_UNAVAILABLE; 59 } 60 61 @Override displayPreference(PreferenceScreen screen)62 public void displayPreference(PreferenceScreen screen) { 63 super.displayPreference(screen); 64 mPreferenceGroup = screen.findPreference(getPreferenceKey()); 65 mPreferenceGroup.setVisible(false); 66 67 if (isAvailable()) { 68 final Context context = screen.getContext(); 69 mBluetoothDeviceUpdater.setPrefContext(context); 70 mSavedDockUpdater.setPreferenceContext(context); 71 } 72 } 73 74 @Override onStart()75 public void onStart() { 76 mBluetoothDeviceUpdater.registerCallback(); 77 mSavedDockUpdater.registerCallback(); 78 } 79 80 @Override onStop()81 public void onStop() { 82 mBluetoothDeviceUpdater.unregisterCallback(); 83 mSavedDockUpdater.unregisterCallback(); 84 } 85 init(DashboardFragment fragment)86 public void init(DashboardFragment fragment) { 87 mBluetoothDeviceUpdater = new SavedBluetoothDeviceUpdater(fragment.getContext(), 88 fragment, PreviouslyConnectedDevicePreferenceController.this); 89 } 90 91 @Override onDeviceAdded(Preference preference)92 public void onDeviceAdded(Preference preference) { 93 mPreferenceSize++; 94 if (mPreferenceSize <= MAX_DEVICE_NUM) { 95 mPreferenceGroup.addPreference(preference); 96 } 97 updatePreferenceVisiblity(); 98 } 99 100 @Override onDeviceRemoved(Preference preference)101 public void onDeviceRemoved(Preference preference) { 102 mPreferenceSize--; 103 mPreferenceGroup.removePreference(preference); 104 updatePreferenceVisiblity(); 105 } 106 107 @VisibleForTesting setBluetoothDeviceUpdater(BluetoothDeviceUpdater bluetoothDeviceUpdater)108 void setBluetoothDeviceUpdater(BluetoothDeviceUpdater bluetoothDeviceUpdater) { 109 mBluetoothDeviceUpdater = bluetoothDeviceUpdater; 110 } 111 112 @VisibleForTesting setSavedDockUpdater(DockUpdater savedDockUpdater)113 void setSavedDockUpdater(DockUpdater savedDockUpdater) { 114 mSavedDockUpdater = savedDockUpdater; 115 } 116 117 @VisibleForTesting setPreferenceGroup(PreferenceGroup preferenceGroup)118 void setPreferenceGroup(PreferenceGroup preferenceGroup) { 119 mPreferenceGroup = preferenceGroup; 120 } 121 122 @VisibleForTesting updatePreferenceVisiblity()123 void updatePreferenceVisiblity() { 124 mPreferenceGroup.setVisible(mPreferenceSize > 0); 125 } 126 } 127