1 /* 2 * Copyright (C) 2025 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.server.ranging; 18 19 import android.content.Context; 20 import android.os.Handler; 21 import android.provider.DeviceConfig; 22 23 import com.android.uwb.resources.R; 24 25 /** 26 * This class allows getting all configurable flags from DeviceConfig. 27 */ 28 public class DeviceConfigFacade { 29 private final Context mContext; 30 31 // Cached values of fields updated via updateDeviceConfigFlags() 32 private String[] mTechnologyPreferenceList; 33 private int mRttRangingRequestDelay; 34 DeviceConfigFacade(Handler handler, Context context)35 public DeviceConfigFacade(Handler handler, Context context) { 36 mContext = context; 37 updateDeviceConfigFlags(); 38 DeviceConfig.addOnPropertiesChangedListener( 39 DeviceConfig.NAMESPACE_UWB, 40 command -> handler.post(command), 41 properties -> { 42 updateDeviceConfigFlags(); 43 }); 44 } 45 46 // device config override with array is not natively supported, so read the value as a comma 47 // separated string. getDeviceConfigStringArray(String name, String[] defaultValue)48 private static String[] getDeviceConfigStringArray(String name, String[] defaultValue) { 49 String value = DeviceConfig.getString(DeviceConfig.NAMESPACE_UWB, name, null); 50 if (value == null) { 51 return defaultValue; 52 } 53 return value.split(" , "); 54 } 55 updateDeviceConfigFlags()56 private void updateDeviceConfigFlags() { 57 mTechnologyPreferenceList = getDeviceConfigStringArray( 58 "technology_preference_list", 59 mContext.getResources().getStringArray(R.array.technology_preference_list) 60 ); 61 mRttRangingRequestDelay = DeviceConfig.getInt(DeviceConfig.NAMESPACE_UWB, 62 "rtt_ranging_request_delay", 63 mContext.getResources().getInteger(R.integer.rtt_ranging_request_delay)); 64 } 65 getTechnologyPreferenceList()66 public String[] getTechnologyPreferenceList() { 67 return mTechnologyPreferenceList; 68 } 69 getRttRangingRequestDelay()70 public int getRttRangingRequestDelay() { 71 return mRttRangingRequestDelay; 72 } 73 } 74