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之前做了关于Android wifi的相关功能，这里做一个记录
第一步：获取WifiManager
WifiManager wifiMgr = (WifiManager)Context.getSystemService(Context.WIFI_SERVICE);
第二步：获取周围热点信息和已连接wifi信息
List<ScanResult> scanResults = wifiMgr.getScanResults();//扫描到的周围热点信息
WifiInfo info = wifiMgr.getConnectionInfo();//已连接wifi信息
这里我说一下几个字段的意思：
public String name;//ssid对应的wifi名字
public String capabilities;//用来判断是否有密码
public int level;//信号等级，这里是负数
public String BSSID;//macid
这里我需要强调的就是level，是负数，负数越大，信号越好
第三步：检测wifi信息，这里我给出几个工具类
/**
* 连接有密码的wifi.
*
* @param SSID ssid
* @param Password Password
* @return apConfig
*/
private WifiConfiguration setWifiParamsPassword(String SSID, String Password) {
WifiConfiguration apConfig = new WifiConfiguration();
apConfig.SSID = "\"" + SSID + "\"";
apConfig.preSharedKey = "\"" + Password + "\"";
//不广播其SSID的网络
apConfig.hiddenSSID = true;
apConfig.status = WifiConfiguration.Status.ENABLED;
//公认的IEEE 802.11验证算法。
apConfig.allowedAuthAlgorithms.clear();
apConfig.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
//公认的的公共组密码
apConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
apConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
//公认的密钥管理方案
apConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
//密码为WPA。
apConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
apConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
//公认的安全协议。
apConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
return apConfig;
}
/**
* 连接没有密码wifi.
*
* @param ssid ssid
* @return configuration
*/
private WifiConfiguration setWifiParamsNoPassword(String ssid) {
WifiConfiguration configuration = new WifiConfiguration();
configuration.SSID = "\"" + ssid + "\"";
configuration.status = WifiConfiguration.Status.ENABLED;
configuration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
configuration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
configuration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
configuration.allowedPairwiseCiphers
.set(WifiConfiguration.PairwiseCipher.TKIP);
configuration.allowedPairwiseCiphers
.set(WifiConfiguration.PairwiseCipher.CCMP);
configuration.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
return configuration;
}
public static final int WIFI_NO_PASS = 0;
private static final int WIFI_WEP = 1;
private static final int WIFI_PSK = 2;
private static final int WIFI_EAP = 3;
/**
* 判断是否有密码.
*
* @param result ScanResult
* @return 0
*/
public static int getSecurity(MyScanResult result) {
if (null != result && null != result.capabilities) {
if (result.capabilities.contains("WEP")) {
return WIFI_WEP;
} else if (result.capabilities.contains("PSK")) {
return WIFI_PSK;
} else if (result.capabilities.contains("EAP")) {
return WIFI_EAP;
}
}
return WIFI_NO_PASS;
}
上面三个工具类，一个用来判断是否需要密码，另外两个用来连接wifi
连接wifi
//需要密码
wifiMgr.enableNetwork(wifiMgr.addNetwork(
setWifiParamsPassword(mClickResult.name, password)), true);
//不需要密码
wifiMgr.enableNetwork(wifiMgr.addNetwork(setWifiParamsNoPassword(mClickResult.name)),
true);
wifi监听
PS：关于wifi状态的监听，就是监听你当前的网络状态即可。
<receiver android:name=".receiver.NetworkReceiver">
<intent-filter>
<action android:name="android.net.wifi.WIFI_STATE_CHANGED"/>
<action android:name="android.net.wifi.STATE_CHANGE"/>
<action android:name="android.net.wifi.supplicant.STATE_CHANGE"/>
<action android:name="android.net.wifi.NETWORK_IDS_CHANGED"/>
</intent-filter>
</receiver>
首先在你的清单文件注册这四种action的广播，这里给出我的网络监听广播
/**
* Author: 海晨忆.
* Date: 2018/1/10
* Desc: 网络广播监听
*/
public class NetworkReceiver extends BroadcastReceiver {
public static final int STATE1 = 1;//密码错误
public static final int STATE2 = 2;//连接成功
public static final int STATE3 = 3;//连接失败
public static final int STATE4 = 4;//正在获取ip地址
public static final int STATE5 = 5;//正在连接
@Override
public void onReceive(Context context, Intent intent) {
if (WifiManager.SUPPLICANT_STATE_CHANGED_ACTION.equals(intent.getAction())) {
//密码错误广播,是不是正在获得IP地址
int linkWifiResult = intent.getIntExtra(WifiManager.EXTRA_SUPPLICANT_ERROR, -1);
if (linkWifiResult == WifiManager.ERROR_AUTHENTICATING) {
//密码错误
ToastUtils.showTipMsg(R.string.password_wrong);
sendNetworkStateChange(new NetWorkInfo().setState(STATE1));
}
SupplicantState supplicantState = intent.getParcelableExtra(WifiManager.EXTRA_NEW_STATE);
NetworkInfo.DetailedState state = WifiInfo.getDetailedStateOf(supplicantState);
Log.v(Constants.HTTP_WZ, state.name());
if (state == NetworkInfo.DetailedState.CONNECTING) {
//正在连接
ToastUtils.showTipMsg(R.string.linking);
sendNetworkStateChange(new NetWorkInfo().setState(STATE5));
} else if (state == NetworkInfo.DetailedState.FAILED
|| state == NetworkInfo.DetailedState.DISCONNECTING) {
//连接失败
sendNetworkStateChange(new NetWorkInfo().setState(STATE3));
ToastUtils.showTipMsg(R.string.linked_failed);
} else if (state == NetworkInfo.DetailedState.CONNECTED) {
//连接成功
ToastUtils.showTipMsg(R.string.linked_success);
} else if (state == NetworkInfo.DetailedState.OBTAINING_IPADDR) {
//正在获取ip地址
sendNetworkStateChange(new NetWorkInfo().setState(STATE4));
} else if (state == NetworkInfo.DetailedState.IDLE) {
//闲置的
ConnectivityManager connectManager = (ConnectivityManager) BaseApplication.getInstance()
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = null;
if (connectManager != null) {
activeNetworkInfo = connectManager.getActiveNetworkInfo();
}
if (activeNetworkInfo == null) {
sendNetworkStateChange(new NetWorkInfo().setState(STATE3));
ToastUtils.showTipMsg(R.string.linked_failed);
}
}
} else if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) {
// 监听wifi的打开与关闭，与wifi的连接无关
int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);
Log.v(Constants.HTTP_WZ, "wifiState:" + wifiState);
switch (wifiState) {
case WifiManager.WIFI_STATE_DISABLING://正在停止0
ToastUtils.showTipMsg(R.string.close_wifi);
break;
case WifiManager.WIFI_STATE_DISABLED://已停止1
break;
case WifiManager.WIFI_STATE_UNKNOWN://未知4
break;
case WifiManager.WIFI_STATE_ENABLING://正在打开2
ToastUtils.showTipMsg(R.string.opening_wifi);
break;
case WifiManager.WIFI_STATE_ENABLED://已开启3
break;
default:
break;
}
} else if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) {
// 监听wifi的连接状态即是否连上了一个有效无线路由
Parcelable parcelableExtra = intent
.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
if (null != parcelableExtra) {
// 获取联网状态的NetWorkInfo对象
NetworkInfo networkInfo = (NetworkInfo) parcelableExtra;
//获取的State对象则代表着连接成功与否等状态
NetworkInfo.State state = networkInfo.getState();
//判断网络是否已经连接
boolean isConnected = state == NetworkInfo.State.CONNECTED;
Log.v(Constants.HTTP_WZ, "isConnected:" + isConnected);
if (isConnected) {
ToastUtils.showTipMsg(R.string.linked_success);
sendNetworkStateChange(new NetWorkInfo().setState(STATE2));
}
}
}
}
/**
* 发送网络状态eventBus.
*
* @param info info
*/
private void sendNetworkStateChange(NetWorkInfo info) {
EventBus.getDefault().post(info);
}
@SuppressWarnings("unused")
private String getConnectionType(int type) {
String connType = "";
if (type == ConnectivityManager.TYPE_MOBILE) {
connType = "移动网络";
} else if (type == ConnectivityManager.TYPE_WIFI) {
connType = "WIFI网络";
}
return connType;
}
public static class NetWorkInfo {
public int state;//1密码错误，2:连接成功，3:连接失败
private NetWorkInfo setState(int state) {
this.state = state;
return this;
}
}
}
注释应该写的很清楚，我就不做过多的解释了。
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