android 没有提供标准的api供我们使用，所以只能采取反射机制，去调用hide掉的接口。
使用wifi 首先要在manifest 文件中添加一下权限。
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
创建wifi热点需要先将wifi关闭，然后配置wifiapconfig，通过发射机制开启wifiap。主代码如下。
public WifiManager mWifiManager;
mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
createWiFiAP(createWifiConfig("jason_test","123456"), true);
public WifiConfiguration createWifiConfig(String ssid, String password) {
WifiConfiguration apConfig = new WifiConfiguration();
apConfig.allowedAuthAlgorithms.clear();
apConfig.allowedGroupCiphers.clear();
apConfig.allowedKeyManagement.clear();
apConfig.allowedPairwiseCiphers.clear();
apConfig.allowedProtocols.clear();
apConfig.SSID = ssid;
apConfig.hiddenSSID = true;
apConfig.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
apConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
apConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
apConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
apConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
apConfig.status = WifiConfiguration.Status.ENABLED;
apConfig.preSharedKey = password;
return apConfig;
}
public void createWiFiAP(WifiConfiguration apConfig,
boolean paramBoolean) {
try {
Class<? extends WifiManager> localClass = mWifiManager.getClass();
Class[] arrayOfClass = new Class[2];
arrayOfClass[0] = WifiConfiguration.class;
arrayOfClass[1] = Boolean.TYPE;
Method localMethod = localClass.getMethod("setWifiApEnabled",
arrayOfClass);
WifiManager localWifiManager = mWifiManager;
Object[] arrayOfObject = new Object[2];
arrayOfObject[0] = apConfig;
arrayOfObject[1] = Boolean.valueOf(paramBoolean);
localMethod.invoke(localWifiManager, arrayOfObject);
return;
} catch (Exception localException) {
}
}