1/* 2 * Copyright (C) 2014 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 17package com.android.tv.settings.connectivity; 18 19import java.util.Comparator; 20 21import android.net.wifi.ScanResult; 22 23/** 24 * Comparator that sorts Wifi scan results by signal strength and network name. 25 */ 26public class ScanResultComparator implements Comparator<ScanResult> { 27 28 private final String mConnectedSSID; 29 private final WifiSecurity mConnectedSecurity; 30 31 public ScanResultComparator(String connectedSSID, WifiSecurity connectedSecurity) { 32 mConnectedSSID = connectedSSID; 33 mConnectedSecurity = connectedSecurity; 34 } 35 36 public ScanResultComparator() { 37 mConnectedSSID = null; 38 mConnectedSecurity = WifiSecurity.NONE; 39 } 40 41 @Override 42 public int compare(ScanResult result1, ScanResult result2) { 43 if (result1 == null) { 44 if (result2 == null) { 45 return 0; 46 } else { 47 return 1; 48 } 49 } else { 50 if (result2 == null) { 51 return -1; 52 } else { 53 WifiSecurity security1 = WifiSecurity.getSecurity(result1); 54 WifiSecurity security2 = WifiSecurity.getSecurity(result2); 55 if (mConnectedSSID != null) { 56 if (result1.SSID.equals(mConnectedSSID) 57 && security1.equals(mConnectedSecurity)) { 58 return -1; 59 } 60 if (result2.SSID.equals(mConnectedSSID) 61 && security2.equals(mConnectedSecurity)) { 62 return 1; 63 } 64 } 65 int levelDiff = result2.level - result1.level; 66 if (levelDiff != 0) { 67 return levelDiff; 68 } 69 if (result1.SSID.equals(result2.SSID)) { 70 return security1.compareTo(security2); 71 } 72 return result1.SSID.compareTo(result2.SSID); 73 } 74 } 75 } 76} 77