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.text.BidiFormatter; 25 import android.text.TextUtils; 26 import android.util.Log; 27 28 import androidx.annotation.VisibleForTesting; 29 import androidx.preference.Preference; 30 import androidx.preference.PreferenceScreen; 31 32 import com.android.settings.R; 33 import com.android.settings.core.BasePreferenceController; 34 import com.android.settingslib.core.lifecycle.LifecycleObserver; 35 import com.android.settingslib.core.lifecycle.events.OnStart; 36 import com.android.settingslib.core.lifecycle.events.OnStop; 37 38 /** 39 * Controller that shows and updates the bluetooth device name 40 */ 41 public class BluetoothDeviceNamePreferenceController extends BasePreferenceController implements 42 LifecycleObserver, OnStart, OnStop { 43 private static final String TAG = "BluetoothNamePrefCtrl"; 44 45 @VisibleForTesting 46 Preference mPreference; 47 protected BluetoothAdapter mBluetoothAdapter; 48 49 /** 50 * Constructor exclusively used for Slice. 51 */ BluetoothDeviceNamePreferenceController(Context context, String preferenceKey)52 public BluetoothDeviceNamePreferenceController(Context context, String preferenceKey) { 53 super(context, preferenceKey); 54 55 mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); 56 if (mBluetoothAdapter == null) { 57 Log.e(TAG, "Bluetooth is not supported on this device"); 58 return; 59 } 60 } 61 62 @Override displayPreference(PreferenceScreen screen)63 public void displayPreference(PreferenceScreen screen) { 64 mPreference = screen.findPreference(getPreferenceKey()); 65 super.displayPreference(screen); 66 } 67 68 @Override onStart()69 public void onStart() { 70 final IntentFilter intentFilter = new IntentFilter(); 71 intentFilter.addAction(BluetoothAdapter.ACTION_LOCAL_NAME_CHANGED); 72 intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED); 73 mContext.registerReceiver(mReceiver, intentFilter); 74 } 75 76 @Override onStop()77 public void onStop() { 78 mContext.unregisterReceiver(mReceiver); 79 } 80 81 @Override getAvailabilityStatus()82 public int getAvailabilityStatus() { 83 return mBluetoothAdapter != null ? AVAILABLE : UNSUPPORTED_ON_DEVICE; 84 } 85 86 @Override updateState(Preference preference)87 public void updateState(Preference preference) { 88 updatePreferenceState(preference); 89 } 90 91 @Override getSummary()92 public CharSequence getSummary() { 93 String deviceName = getDeviceName(); 94 if (TextUtils.isEmpty(deviceName)) { 95 return super.getSummary(); 96 } 97 98 return TextUtils.expandTemplate( 99 mContext.getText(R.string.bluetooth_device_name_summary), 100 BidiFormatter.getInstance().unicodeWrap(deviceName)).toString(); 101 } 102 103 /** 104 * Create preference to show bluetooth device name 105 * 106 * @param screen to add the preference in 107 * @param order to decide position of the preference 108 * @return bluetooth preference that created in this method 109 */ createBluetoothDeviceNamePreference(PreferenceScreen screen, int order)110 public Preference createBluetoothDeviceNamePreference(PreferenceScreen screen, int order) { 111 mPreference = new Preference(screen.getContext()); 112 mPreference.setOrder(order); 113 mPreference.setKey(getPreferenceKey()); 114 screen.addPreference(mPreference); 115 116 return mPreference; 117 } 118 119 /** 120 * Update device summary with {@code deviceName}, where {@code deviceName} has accent color 121 * 122 * @param preference to set the summary for 123 */ updatePreferenceState(final Preference preference)124 protected void updatePreferenceState(final Preference preference) { 125 preference.setSelectable(false); 126 preference.setSummary(getSummary()); 127 } 128 getDeviceName()129 protected String getDeviceName() { 130 return mBluetoothAdapter.getName(); 131 } 132 133 /** 134 * Receiver that listens to {@link BluetoothAdapter#ACTION_LOCAL_NAME_CHANGED} and updates the 135 * device name if possible 136 */ 137 @VisibleForTesting 138 final BroadcastReceiver mReceiver = new BroadcastReceiver() { 139 @Override 140 public void onReceive(Context context, Intent intent) { 141 final String action = intent.getAction(); 142 143 if (TextUtils.equals(action, BluetoothAdapter.ACTION_LOCAL_NAME_CHANGED)) { 144 if (mPreference != null && mBluetoothAdapter != null 145 && mBluetoothAdapter.isEnabled()) { 146 updatePreferenceState(mPreference); 147 } 148 } else if (TextUtils.equals(action, BluetoothAdapter.ACTION_STATE_CHANGED)) { 149 updatePreferenceState(mPreference); 150 } 151 } 152 }; 153 } 154