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;
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
// 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,}));
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;
