接著上篇的獲取藍牙串列，這次我們來獲取android設備的wifi串列，話不多少直接上代碼！
1.首先我們先獲取wifi權限
<!-- 以下是使用wifi訪問網路所需的權限 -->
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />接下來我們直接來定義wifiUtil
public class WifiUtil {
private Context context;
public WifiUtil(Context context) {
this.context = context;
}
// TODO: 2021/9/15 獲取本機WIFI設備詳細資訊
@SuppressLint("MissingPermission")
public void getDetailsWifiInfo() {
StringBuffer sInfo = new StringBuffer();
WifiManager mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo mWifiInfo = mWifiManager.getConnectionInfo();
int Ip = mWifiInfo.getIpAddress();
String strIp = "" + (Ip & 0xFF) + "." + ((Ip >> 8) & 0xFF) + "." + ((Ip >> 16) & 0xFF) + "." + ((Ip >> 24) & 0xFF);
sInfo.append("\n--BSSID : " + mWifiInfo.getBSSID());
sInfo.append("\n--SSID : " + mWifiInfo.getSSID());
sInfo.append("\n--nIpAddress : " + strIp);
sInfo.append("\n--MacAddress : " + mWifiInfo.getMacAddress());
sInfo.append("\n--NetworkId : " + mWifiInfo.getNetworkId());
sInfo.append("\n--LinkSpeed : " + mWifiInfo.getLinkSpeed() + "Mbps");
sInfo.append("\n--Rssi : " + mWifiInfo.getRssi());
sInfo.append("\n--SupplicantState : " + mWifiInfo.getSupplicantState()+mWifiInfo);
sInfo.append("\n\n\n\n");
Log.d("getDetailsWifiInfo", sInfo.toString());
}
// TODO: 2021/9/15 獲取附近wifi信號
public List<String> getAroundWifiDeviceInfo() {
StringBuffer sInfo = new StringBuffer();
WifiManager mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo mWifiInfo = mWifiManager.getConnectionInfo();
List<ScanResult> scanResults = mWifiManager.getScanResults();//搜索到的設備串列
List<ScanResult> newScanResultList = new ArrayList<>();
for (ScanResult scanResult : scanResults) {
int position = getItemPosition(newScanResultList,scanResult);
if (position != -1){
if (newScanResultList.get(position).level < scanResult.level){
newScanResultList.remove(position);
newScanResultList.add(position,scanResult);
}
}else {
newScanResultList.add(scanResult);
}
}
List<String> stringList = new ArrayList<>();
for (int i = 0; i <newScanResultList.size() ; i++) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("設備名(SSID) ->" + newScanResultList.get(i).SSID + "\n");
stringBuilder.append("信號強度 ->" + newScanResultList.get(i).level + "\n");
stringBuilder.append("BSSID ->" + newScanResultList.get(i).BSSID + "\n");
stringBuilder.append("level ->" + newScanResultList.get(i).level + "\n");
stringBuilder.append("采集時間戳 ->" +System.currentTimeMillis() + "\n");
stringBuilder.append("rssi ->" + (mWifiInfo != null && (mWifiInfo.getSSID().replace("\"", "")).equals(newScanResultList.get(i).SSID) ? mWifiInfo.getRssi() : null) + "\n");
//是否為連接信號(1連接，默認為null)
stringBuilder.append("是否為連接信號 ->" + (mWifiInfo != null && (mWifiInfo.getSSID().replace("\"", "")).equals(newScanResultList.get(i).SSID) ? 1: null) + "\n");
stringBuilder.append("信道 - >" +getCurrentChannel(mWifiManager) + "\n");
//1 為2.4g 2 為5g
stringBuilder.append("頻段 ->" + is24GOr5GHz(newScanResultList.get(i).frequency));
stringList.add(stringBuilder.toString());
}
Log.d("getAroundWifiDeviceInfo", sInfo.toString());
return stringList;
}
public static String is24GOr5GHz(int freq) {
if (freq > 2400 && freq < 2500){
return "1";
}else if (freq > 4900 && freq < 5900){
return "2";
}else {
return "無法判斷";
}
}
/**
* 回傳item在list中的坐標
*/
private int getItemPosition(List<ScanResult>list, ScanResult item) {
for (int i = 0; i < list.size(); i++) {
if (item.SSID.equals(list.get(i).SSID)) {
return i;
}
}
return -1;
}
public static int getCurrentChannel(WifiManager wifiManager) {
WifiInfo wifiInfo = wifiManager.getConnectionInfo();// 當前wifi連接資訊
List<ScanResult> scanResults = wifiManager.getScanResults();
for (ScanResult result : scanResults) {
if (result.BSSID.equalsIgnoreCase(wifiInfo.getBSSID())
&& result.SSID.equalsIgnoreCase(wifiInfo.getSSID()
.substring(1, wifiInfo.getSSID().length() - 1))) {
return getChannelByFrequency(result.frequency);
}
}
return -1;
}
/**
* 根據頻率獲得信道
*
* @param frequency
* @return
*/
public static int getChannelByFrequency(int frequency) {
int channel = -1;
switch (frequency) {
case 2412:
channel = 1;
break;
case 2417:
channel = 2;
break;
case 2422:
channel = 3;
break;
case 2427:
channel = 4;
break;
case 2432:
channel = 5;
break;
case 2437:
channel = 6;
break;
case 2442:
channel = 7;
break;
case 2447:
channel = 8;
break;
case 2452:
channel = 9;
break;
case 2457:
channel = 10;
break;
case 2462:
channel = 11;
break;
case 2467:
channel = 12;
break;
case 2472:
channel = 13;
break;
case 2484:
channel = 14;
break;
case 5745:
channel = 149;
break;
case 5765:
channel = 153;
break;
case 5785:
channel = 157;
break;
case 5805:
channel = 161;
break;
case 5825:
channel = 165;
break;
}
return channel;
}
}
記得獲取wifi的程序中要去掉重復的信號哈，去重代碼
for (ScanResult scanResult : scanResults) {
int position = getItemPosition(newScanResultList,scanResult);
if (position != -1){
if (newScanResultList.get(position).level < scanResult.level){
newScanResultList.remove(position);
newScanResultList.add(position,scanResult);
}
}else {
newScanResultList.add(scanResult);
}
}2.在需要獲取串列的地方設定資料，記得動態獲取權限哈
// TODO: 2021/9/18 設定wifi管理器并動態獲取手機權限
@SuppressLint({"CheckResult","NotifyDataSetChanged"})
private void setWifiManager() {
RxPermissions rxPermissions = new RxPermissions(this);
rxPermissions.requestEach(Manifest.permission.ACCESS_FINE_LOCATION)
.subscribe(permission -> {
if (permission.name.equalsIgnoreCase(Manifest.permission.ACCESS_FINE_LOCATION)) {
wifiUtil = new WifiUtil(this);
wifiListAdapter.getDatas().clear();
wifiList.clear();
wifiList.add(getString(R.string.wifi_list));
wifiList.addAll(wifiUtil.getAroundWifiDeviceInfo());
for (int i = 0; i < wifiList.size(); i++) {
typeBeanList.add(new TypeBean(true, wifiList.get(i)));
}
wifiListAdapter.notifyDataSetChanged();
}
});
}3.展示結果
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