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 17 package com.android.settings.bluetooth; 18 19 import android.bluetooth.BluetoothAdapter; 20 import android.content.BroadcastReceiver; 21 import android.content.Context; 22 import android.content.Intent; 23 import android.content.IntentFilter; 24 import android.support.annotation.VisibleForTesting; 25 import android.support.v7.preference.Preference; 26 import android.support.v7.preference.PreferenceScreen; 27 import android.text.BidiFormatter; 28 import android.text.TextUtils; 29 import android.util.Log; 30 31 import com.android.settings.R; 32 import com.android.settings.core.BasePreferenceController; 33 import com.android.settingslib.bluetooth.LocalBluetoothAdapter; 34 import com.android.settingslib.bluetooth.LocalBluetoothManager; 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 that shows and updates the bluetooth device name 41 */ 42 public class BluetoothDeviceNamePreferenceController extends BasePreferenceController implements 43 LifecycleObserver, OnStart, OnStop { 44 private static final String TAG = "BluetoothNamePrefCtrl"; 45 46 @VisibleForTesting 47 Preference mPreference; 48 private LocalBluetoothManager mLocalManager; 49 protected LocalBluetoothAdapter mLocalAdapter; 50 51 /** 52 * Constructor exclusively used for Slice. 53 */ BluetoothDeviceNamePreferenceController(Context context, String preferenceKey)54 public BluetoothDeviceNamePreferenceController(Context context, String preferenceKey) { 55 super(context, preferenceKey); 56 57 mLocalManager = Utils.getLocalBtManager(context); 58 if (mLocalManager == null) { 59 Log.e(TAG, "Bluetooth is not supported on this device"); 60 return; 61 } 62 mLocalAdapter = mLocalManager.getBluetoothAdapter(); 63 } 64 65 @VisibleForTesting BluetoothDeviceNamePreferenceController(Context context, LocalBluetoothAdapter localAdapter, String preferenceKey)66 BluetoothDeviceNamePreferenceController(Context context, LocalBluetoothAdapter localAdapter, 67 String preferenceKey) { 68 super(context, preferenceKey); 69 mLocalAdapter = localAdapter; 70 } 71 72 @Override displayPreference(PreferenceScreen screen)73 public void displayPreference(PreferenceScreen screen) { 74 mPreference = screen.findPreference(getPreferenceKey()); 75 super.displayPreference(screen); 76 } 77 78 @Override onStart()79 public void onStart() { 80 final IntentFilter intentFilter = new IntentFilter(); 81 intentFilter.addAction(BluetoothAdapter.ACTION_LOCAL_NAME_CHANGED); 82 intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED); 83 mContext.registerReceiver(mReceiver, intentFilter); 84 } 85 86 @Override onStop()87 public void onStop() { 88 mContext.unregisterReceiver(mReceiver); 89 } 90 91 @Override getAvailabilityStatus()92 public int getAvailabilityStatus() { 93 return mLocalAdapter != null ? AVAILABLE : UNSUPPORTED_ON_DEVICE; 94 } 95 96 @Override updateState(Preference preference)97 public void updateState(Preference preference) { 98 updatePreferenceState(preference); 99 } 100 101 @Override getSummary()102 public CharSequence getSummary() { 103 String deviceName = getDeviceName(); 104 if (TextUtils.isEmpty(deviceName)) { 105 return super.getSummary(); 106 } 107 108 return TextUtils.expandTemplate( 109 mContext.getText(R.string.bluetooth_device_name_summary), 110 BidiFormatter.getInstance().unicodeWrap(deviceName)).toString(); 111 } 112 113 /** 114 * Create preference to show bluetooth device name 115 * 116 * @param screen to add the preference in 117 * @param order to decide position of the preference 118 * @return bluetooth preference that created in this method 119 */ createBluetoothDeviceNamePreference(PreferenceScreen screen, int order)120 public Preference createBluetoothDeviceNamePreference(PreferenceScreen screen, int order) { 121 mPreference = new Preference(screen.getContext()); 122 mPreference.setOrder(order); 123 mPreference.setKey(getPreferenceKey()); 124 screen.addPreference(mPreference); 125 126 return mPreference; 127 } 128 129 /** 130 * Update device summary with {@code deviceName}, where {@code deviceName} has accent color 131 * 132 * @param preference to set the summary for 133 */ updatePreferenceState(final Preference preference)134 protected void updatePreferenceState(final Preference preference) { 135 preference.setSelectable(false); 136 preference.setSummary(getSummary()); 137 } 138 getDeviceName()139 protected String getDeviceName() { 140 return mLocalAdapter.getName(); 141 } 142 143 /** 144 * Receiver that listens to {@link BluetoothAdapter#ACTION_LOCAL_NAME_CHANGED} and updates the 145 * device name if possible 146 */ 147 @VisibleForTesting 148 final BroadcastReceiver mReceiver = new BroadcastReceiver() { 149 @Override 150 public void onReceive(Context context, Intent intent) { 151 final String action = intent.getAction(); 152 153 if (TextUtils.equals(action, BluetoothAdapter.ACTION_LOCAL_NAME_CHANGED)) { 154 if (mPreference != null && mLocalAdapter != null && mLocalAdapter.isEnabled()) { 155 updatePreferenceState(mPreference); 156 } 157 } else if (TextUtils.equals(action, BluetoothAdapter.ACTION_STATE_CHANGED)) { 158 updatePreferenceState(mPreference); 159 } 160 } 161 }; 162 } 163