Android WIFI開發，包含開啟WIFI，掃描列表。 自動連線指定WIFI等
阿新 • • 發佈：2019-01-05
本文章是在原文基礎上進行開發，，修改的 ，原文地址如下：
https://www.cnblogs.com/pied/p/3767336.html
開發中專案如下：
package stu.edu.cn.myapplication;
import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import java.util.List;
public class WifiAdmin {
// 定義WifiManager物件
private WifiManager mWifiManager;
// 定義WifiInfo物件
private WifiInfo mWifiInfo;
// 掃描出的網路連線列表
private List<ScanResult> mWifiList;
// 網路連線列表
private List<WifiConfiguration> mWifiConfiguration;
// 定義一個WifiLock
WifiManager.WifiLock mWifiLock;
// 構造器
public WifiAdmin(Context context) {
// 取得WifiManager物件
mWifiManager = (WifiManager) context
.getSystemService(Context.WIFI_SERVICE);
// 取得WifiInfo物件
mWifiInfo = mWifiManager.getConnectionInfo();
}
// 開啟WIFI
public void openWifi() {
if (!mWifiManager.isWifiEnabled()) {
boolean startOk= mWifiManager.setWifiEnabled(true);
int i=0;
i++;
}
}
// 關閉WIFI
public void closeWifi() {
if (mWifiManager.isWifiEnabled()) {
mWifiManager.setWifiEnabled(false);
}
}
// 檢查當前WIFI狀態
public int checkState() {
return mWifiManager.getWifiState();
}
// 鎖定WifiLock
public void acquireWifiLock() {
mWifiLock.acquire();
}
// 解鎖WifiLock
public void releaseWifiLock() {
// 判斷時候鎖定
if (mWifiLock.isHeld()) {
mWifiLock.acquire();
}
}
// 建立一個WifiLock
public void creatWifiLock() {
mWifiLock = mWifiManager.createWifiLock("Test");
}
// 得到配置好的網路
public List<WifiConfiguration> getConfiguration() {
return mWifiConfiguration;
}
// 指定配置好的網路進行連線
public void connectConfiguration(int index) {
// 索引大於配置好的網路索引返回
if (index > mWifiConfiguration.size()) {
return;
}
// 連線配置好的指定ID的網路
mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId,
true);
}
public void startScan() {
mWifiManager.startScan();
// 得到掃描結果
mWifiList = mWifiManager.getScanResults();
// 得到配置好的網路連線
mWifiConfiguration = mWifiManager.getConfiguredNetworks();
}
// 得到網路列表
public List<ScanResult> getWifiList() {
return mWifiList;
}
// 檢視掃描結果
public StringBuilder lookUpScan() {
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < mWifiList.size(); i++) {
stringBuilder
.append("Index_" + new Integer(i + 1).toString() + ":");
// 將ScanResult資訊轉換成一個字串包
// 其中把包括：BSSID、SSID、capabilities、frequency、level
stringBuilder.append((mWifiList.get(i)).toString());
stringBuilder.append("----------------");
}
return stringBuilder;
}
// 得到MAC地址
public String getMacAddress() {
return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress();
}
// 得到接入點的BSSID
public String getBSSID() {
return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();
}
// 得到IP地址
public int getIPAddress() {
return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();
}
// 得到連線的ID
public int getNetworkId() {
return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();
}
// 得到WifiInfo的所有資訊包
public String getWifiInfo() {
return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();
}
// 新增一個網路並連線
public void addNetwork(WifiConfiguration wcg) {
int wcgID = mWifiManager.addNetwork(wcg);
boolean b = mWifiManager.enableNetwork(wcgID, true);
System.out.println("a--" + wcgID);
System.out.println("b--" + b);
}
// 斷開指定ID的網路
public void disconnectWifi(int netId) {
mWifiManager.disableNetwork(netId);
mWifiManager.disconnect();
}
/*//然後是一個實際應用方法，只驗證過沒有密碼的情況：
public WifiConfiguration CreateWifiInfo(String SSID, String Password, int Type)
{
WifiConfiguration config = new WifiConfiguration();
config.allowedAuthAlgorithms.clear();
config.allowedGroupCiphers.clear();
config.allowedKeyManagement.clear();
config.allowedPairwiseCiphers.clear();
config.allowedProtocols.clear();
config.SSID = "/" + SSID + "/";
WifiConfiguration tempConfig = this.IsExsits(SSID);
if(tempConfig != null) {
mWifiManager.removeNetwork(tempConfig.networkId);
}
if(Type == 1) //WIFICIPHER_NOPASS
{
config.wepKeys[0] = "";
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.wepTxKeyIndex = 0;
}
if(Type == 2) //WIFICIPHER_WEP
{
config.hiddenSSID = true;
config.wepKeys[0]= "/"+Password+"/";
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.wepTxKeyIndex = 0;
}
if(Type == 3) //WIFICIPHER_WPA
{
config.preSharedKey = "/"+Password+"/";
config.hiddenSSID = true;
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
//config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
config.status = WifiConfiguration.Status.ENABLED;
}
return config;
}*/
/*public WifiConfiguration CreateWifiInfo(String SSID, String Password,
int Type) {
WifiConfiguration config = new WifiConfiguration();
config.allowedAuthAlgorithms.clear();
config.allowedGroupCiphers.clear();
config.allowedKeyManagement.clear();
config.allowedPairwiseCiphers.clear();
config.allowedProtocols.clear();
config.SSID = "\"" + SSID + "\"";
WifiConfiguration tempConfig = this.IsExsits(SSID);
if (tempConfig != null) {
mWifiManager.removeNetwork(tempConfig.networkId);
}
if (Type == 1) // WIFICIPHER_NOPASS
{
config.wepKeys[0] = "";
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.wepTxKeyIndex = 0;
}
if (Type == 2) // WIFICIPHER_WEP
{
config.hiddenSSID = true;
config.wepKeys[0] = "\"" + Password + "\"";
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.wepTxKeyIndex = 0;
}
if (Type == 3) // WIFICIPHER_WPA
{
config.preSharedKey = "\"" + Password + "\"";
config.hiddenSSID = true;
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
// config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
config.status = WifiConfiguration.Status.ENABLED;
}
return config;
}*/
public WifiConfiguration CreateWifiInfo(ScanResult scan, String Password) {
WifiConfiguration config = new WifiConfiguration();
config.hiddenSSID = false;
config.status = WifiConfiguration.Status.ENABLED;
if (scan.capabilities.contains("WEP")) {
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
config.SSID = "\"" + scan.SSID + "\"";
config.wepTxKeyIndex = 0;
config.wepKeys[0] = Password;
} else if (scan.capabilities.contains("PSK")) {
config.SSID = "\"" + scan.SSID + "\"";
config.preSharedKey = "\"" + Password + "\"";
} else if (scan.capabilities.contains("EAP")) {
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_EAP);
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
config.SSID = "\"" + scan.SSID + "\"";
config.preSharedKey = "\"" + Password + "\"";
} else {
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.SSID = "\"" + scan.SSID + "\"";
config.preSharedKey = null;
config.wepKeys[0] = "\"" + "\"";
config.wepTxKeyIndex = 0;
}
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); 上面是公共類書寫。那個標紅的語句格外注意。。不加的話經常連不上。
許可權如下：
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" ></uses-permission> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" ></uses-permission> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" ></uses-permission> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" ></uses-permission>
呼叫方法如下：
WifiAdmin wifiAdmin = new WifiAdmin(this);
wifiAdmin.openWifi();
wifiAdmin.startScan();
tv.setText(wifiAdmin.lookUpScan());
for(int i=0;i<wifiAdmin.getWifiList().size();i++){
String name=wifiAdmin.getWifiList().get(i).SSID;
if(wifiAdmin.getWifiList().get(i).SSID.equals("wifi小孫")){
wifiAdmin.addNetwork(wifiAdmin.CreateWifiInfo(wifiAdmin.getWifiList().get(i),"12345678a"));
break;
}
}