WifiController

相关类

import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiManager;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiConfiguration.KeyMgmt;
import android.net.wifi.WifiConfiguration.AuthAlgorithm;
import android.net.wifi.WifiInfo;
import android.net.wifi.SupplicantState;
import android.net.NetworkInfo.DetailedState;
import android.net.DhcpInfo;

基本流程

• WifiManager.isWifiEnabled()判断本地Wifi功能是否启用，WifiManager.setWifiEnabled()方法开启本地Wifi功能
• 通过WifiManager.startScan()方法来扫描热点，并返回ScanResult的列表
• 配置WifiConfiguration对象，通过WifiManager.addNetwork()方法添加网络连接，WifiManager.enableNetwork()方法开启网络连接，在网络连接成功后记录当前连接状态
• 通过WifiManager.removeNetwork()移除网络连接，WifiManager.disableNetwork()方法禁用网络连接

主要类说明

ScanResult --- 扫描结果

WifiConfiguration --- 连接配置

SupplicantState --- Supplicant状态

示例代码

扫描热点

// 获取WifiManager实例
WifiManager mWifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);

// 判断Wifi是否开启
if (!mWifiManager.isWifiEnabled()) {
    // 设置
    mWifiManager.setWifiEnabled(true);
}
mWifiManager.startScan();

// 获取扫描结果
ArrayList<ScanResult> mScanList = (ArrayList<ScanResult>) mWifiManager.getScanResults();
for (int i = mScanList.size() - 1; i >= 0; i--) {
    ScanResult scan = mScanList.get(i);
    Log.i(TAG, String.format("ScanResult_%d = SSID:%-20s, BSSID:%-20s, Level:%-5d, Sign:%1d, Frequency:%-6d, Capabilities:%-50s",
            new Object[]{i, scan.SSID, scan.BSSID,
            scan.level, WifiManager.calculateSignalLevel(scan.level, 5),
            scan.frequency, scan.capabilities,}));
}

配置连接

private WifiConfiguration getConfig(AccessPointState ap) {
    WifiConfiguration wc = new WifiConfiguration();

    // 获取密码和密码长度
    String passWord = ap.getPassword();
    int passwordLen = passWord.length();

    wc.SSID = "\"" + ap.getSsid() + "\"";
    wc.hiddenSSID = true;
    wc.status = WifiConfiguration.Status.ENABLED;        

    // 开放网络类型
    if ( ap.securityIsOpen() ) {
        wc.allowedKeyManagement.set(KeyMgmt.NONE);
    }
    // WEP加密类型
    else if ( ap.securityIsWep() ) {
        wc.allowedKeyManagement.set(KeyMgmt.NONE);
        wc.allowedAuthAlgorithms.set(AuthAlgorithm.OPEN);
        wc.allowedAuthAlgorithms.set(AuthAlgorithm.SHARED);

        if (passwordLen != 0) {
            // WEP-40, WEP-104, and 256-bit WEP (WEP-232?)
            if ((passwordLen == 10 || passwordLen == 26 || passwordLen == 58) &&
                    passWord.matches("[0-9A-Fa-f]*")) {
                wc.wepKeys[0] = passWord;
            } else {
                wc.wepKeys[0] = '"' + passWord + '"';
            }
        }
    }
    // PSK加密类型
    else if ( ap.securityIsPsk() ) {
        wc.allowedKeyManagement.set(KeyMgmt.WPA_PSK);

        if (passwordLen != 0) {
            if (passWord.matches("[0-9A-Fa-f]{64}")) {
                wc.preSharedKey = passWord;
            } else {
                wc.preSharedKey = '"' + passWord + '"';
            }
        } 
    }
    // EAP加密类型
    else if ( ap.securityIsEap() ) {
    }
    
    return wc;
}

连接Wifi

public boolean connectWifi(AccessPointState ap) {
    int networkID = -1;
    boolean enableWifi = false;

    WifiConfiguration wc = getConfig(ap);

    // 获取网络ID
    networkID = mWifiManager.addNetwork(wc);
    if ( -1 == networkID ) {
        return false;
    }

    // 添加网络连接
    enableWifi = mWifiManager.enableNetwork(networkID, true);

    return enableWifi;
}

断开Wifi

public boolean disconnectWifi(AccessPointState ap) {
    mWifiManager.disconnect(); 
    boolean disabled = mWifiManager.disableNetwork(ap.getNetworkId()); 

    return disabled;
}

获取Wifi连接信息

public boolean updateConnectedWifiInfo(AccessPointState ap) {
    WifiInfo info = mWifiManager.getConnectionInfo();
    SupplicantState state;
    DetailedState detailState;

    if ( info != null ) {
        if ( isWifiEnabled() ) {
            // 获取连接速度
            ap.setLinkSpeed(info.getLinkSpeed());

            // 获取连接状态
            state = info.getSupplicantState();
            detailState = info.getDetailedStateOf(state);
            ap.setState(detailState);

            // 获取信号强度
            ap.setSign(WifiManager.calculateSignalLevel(info.getRssi(), 5));

            // 获取dhcp信息
            DhcpInfo dhcpInfo = mWifiManager.getDhcpInfo();

            return true;
        }
    } 

    return false;
}