连接WiFi AP需要实现以下步骤:
扫描WiFi
确保您拥有适当的AP。请注意,您必须提供受保护的AP密码。假设您知道您喜欢的AP,现在我们转到下一步:
创建新配置文件
我们必须支持以下信息:
应该是什么类型的AP: 开放式网络, WEP, WPA, (或WPA2),采用共享密钥身份验证, WPA2-企业级(RADIUS服务器身份验证)
优先级-优先级确定wpa_supplicant选择与之关联的接入点时给出的首选项(我设置默认值为1000)。
SSID - AP Name
密码 - 如果它是安全的AP。
这里是演示技术的代码片段:
我使用单个enum TEncMode encMode
进行开关语句。
....
WifiConfiguration wc = new WifiConfiguration();
wc.allowedAuthAlgorithms.clear();
wc.allowedGroupCiphers.clear();
wc.allowedKeyManagement.clear();
wc.allowedPairwiseCiphers.clear();
wc.allowedProtocols.clear();
switch (encMode) {
case ENC_WEP:
// If password is empty, it should be left untouched
if (!TextUtils.isEmpty(pswd)) {
wc.wepKeys[0] = TextUtil.convertToQuotedString(pswd);
}
wc.wepTxKeyIndex = 0;
wc.allowedAuthAlgorithms.set(AuthAlgorithm.OPEN);
wc.allowedAuthAlgorithms.set(AuthAlgorithm.SHARED);
wc.allowedKeyManagement.set(KeyMgmt.NONE);
wc.allowedGroupCiphers.set(GroupCipher.WEP40);
wc.allowedGroupCiphers.set(GroupCipher.WEP104);
break;
case ENC_WPA:
case ENC_WPA2:
wc.allowedGroupCiphers.set(GroupCipher.TKIP);
wc.allowedGroupCiphers.set(GroupCipher.CCMP);
wc.allowedKeyManagement.set(KeyMgmt.WPA_PSK);
wc.allowedPairwiseCiphers.set(PairwiseCipher.CCMP);
wc.allowedPairwiseCiphers.set(PairwiseCipher.TKIP);
wc.allowedProtocols.set(Protocol.RSN);
wc.allowedProtocols.set(Protocol.WPA);
// If password is empty, it should be left untouched
if (!TextUtils.isEmpty(pswd)) {
if (pswd.length() == 64) {
// Goes unquoted as hex
wc.preSharedKey = pswd;
} else {
// Goes quoted as ASCII
wc.preSharedKey = TextUtil.convertToQuotedString(pswd);
}
}
break;
// case ENC_WPA2_ENTERPRISE:
....
// break;
default:
wc.allowedKeyManagement.set(KeyMgmt.NONE);
break;
}
// This is must be quoted according to the documentation
// http://developer.android.com/reference/android/net/wifi/WifiConfiguration.html#SSID
wc.SSID = TextUtil.convertToQuotedString(ssid.toString());
wc.hiddenSSID = false;
wc.priority = prior;
wc.BSSID = null;
wc.status = WifiConfiguration.Status.ENABLED;
现在我们已经根据我们的要求配置了新的AP。现在让我们创建它:
Create new AP only
....
int res = -1;
WifiManager m_WifiManager = (WifiManager)m_context.getSystemService(Context.WIFI_SERVICE);
....
/** If profile exists, do nothing */
if(ifConnectionProfileExists(ssid) == true){
Log.i(Constants.TAG, "createConnectionProfile :: " + "CREATE_PROFILE ssid=" + ssid + " exists");
}
else{
res = m_WifiManager.addNetwork(wc);
Log.i(Constants.TAG, "createConnectionProfile :: " + " CREATE_PROFILE ssid=" + ssid + " dosn't exist, addNetwork ... res = " + res);
// Don't make to AP high priority to connect
//m_WifiManager.enableNetwork(res, false);
m_WifiManager.saveConfiguration();
if(res != -1){
// profile created
}
else{
// failed to add profile
}
}
如果您跳过此实现,关闭WiFi后您创建的AP将会消失。m_WifiManager.saveConfiguration();
到目前为止还不错,我们可以等待Android连接到我们的新AP,或者自己连接。
Create and connect to AP
int res = -1;
/** If profile exists, do nothing */
if(ifConnectionProfileExists(ssid) == true){
res = getNetIdBySSID(ssid);
}
else{
res = m_WifiManager.addNetwork(wc);
}
// Don't make to AP high priority to connect
boolean b = m_WifiManager.enableNetwork(res, true);
if(b == true){
fixSupplicant();
m_WifiManager.saveConfiguration();
// start connect to AP
}
else{
// failed
}
....
private void fixSupplicant() {
final SupplicantState state = m_WifiManager.getConnectionInfo().getSupplicantState();
boolean isReconnectDone = false;
if ((state == SupplicantState.SCANNING)
|| (state == SupplicantState.DISCONNECTED)
|| (state == SupplicantState.DORMANT)) {
isReconnectDone = m_WifiManager.reconnect();;
}
}
private boolean ifConnectionProfileExists(String ssid){
List<WifiConfiguration> apProfiles = m_WifiManager.getConfiguredNetworks();
// remove profile if exists:
for (int i = 0; i < apProfiles.size(); i++) {
final WifiConfiguration ap = apProfiles.get(i);
if ((ap.SSID != null)) {
// try to find by SSID
if (TextUtils.equals(ap.SSID), ssid) {
return true;
}
}
}
return false;
}
Enum TEncMode
/**
* Represents encryption types modes of access points
*/
public enum TEncMode {
/**
* No encryption (open spot)
*/
ENC_NONE(0),
/*
* General encryption
*/
ENC_UNKNOWN(1),
/**
* WEP
*/
ENC_WEP(2),
/**
* WPA
*/
ENC_WPA(3),
/**
* WPA (or WPA2), with shared-key authentication
*/
ENC_WPA2(4),
/**
* WPA2-Enterprise (RADIUS Server authentication).
*/
ENC_WPA2_ENTERPRISE(5)
;
public static TEncMode
FromIntToEnum(
int value ) throws Exception
{
for ( TEncMode c : TEncMode.values() ) {
if ( c.mId == value ) {
return c;
}
}
throw new AgException( new StringBuilder("Illegal TEncMode: ").append(value).toString() );
}
public int
FromEnumToInt() {
return mId;
}
private TEncMode( int id ){
mId = id;
}
private int mId;
}
以上就是全部内容。当然你可以监听WiFi状态的改变并捕获 CONNECTED
事件,因为我们不知道设备连接到您的AP需要多长时间。但是我们已经禁用了所有其他AP并启用了新的AP。在此之后,我们可以从Google获取HTTP响应,以确保我们的AP具有Internet连接。
要求我添加此方法:
/**
* Surround the given string in quotes.
*
* @param string The text to surround in quotes.
* @return string wrapped with quotes.
*/
static public String convertToQuotedString(String string){
if (string==null) {
string = "";
}
empty(workBuffer);
workBuffer.append("\"");
workBuffer.append(string);
workBuffer.append("\"");
return workBuffer.toString();
}
package com.nifty.android.initialization;
import android.content.Context;
import android.net.wifi.WifiManager;
import android.telephony.TelephonyManager;
import android.util.Log;
import com.nifty.android.R;
import com.nifty.android.preferences.Preferences;
public class NetworkDetector {
Context mContext = null;
Preferences mPrefs = null;
public static final String NONE = "none";
public static final String HI_SPEED = "hiSpeed";
public static final String MED_SPEED = "medSpeed";
public static final String LOW_SPEED = "lowSpeed";
public NetworkDetector(Context aContext) {
mContext = aContext;
mPrefs = new Preferences(aContext);
WifiManager lWifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
TelephonyManager lTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
String netSpeed = null;
if( (lWifiManager.isWifiEnabled() && lWifiManager.getConnectionInfo() != null && lWifiManager.getConnectionInfo().getIpAddress() != 0)) {
netSpeed = HI_SPEED;
} else {
if(lTelephonyManager.getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS && lTelephonyManager.getDataState() == TelephonyManager.DATA_CONNECTED) {
netSpeed = MED_SPEED;
} else {
if( ( lTelephonyManager != null && lTelephonyManager.getDataState() == TelephonyManager.DATA_CONNECTED) ){
netSpeed = LOW_SPEED;
} else {
netSpeed = NONE;
}
}
}
mPrefs.networkSpeed(netSpeed);
}
}