[英]How to connect to a wireless network in android?
我已设法扫描无线网络并在我的应用程序中获取扫描结果。 但有没有办法可以使用我的应用程序本身连接到他们? 我想知道是否必须为我正在尝试连接的网络指定加密类型? 我的要求是连接到任何无线网络而不管它的加密类型?
有任何想法吗? 谢谢
要连接到实施以下步骤所需的WiFi AP:
扫描WiFi
确保您有适当的AP。 请记住,您必须为安全的AP提供密码。 假设您知道自己喜欢的女巫AP,现在我们将采取其他措施:
创建新的个人资料
我们需要支持以下信息:
应该是什么类型的AP :开放点,WEP,WPA,(或WPA2),具有共享密钥身份验证,WPA2-Enterprise(RADIUS服务器身份验证)
优先级 - 优先级确定wpa_supplicant在选择要关联的接入点时给予网络的优先级(我设置默认值1000)
SSID - AP Name
密码 - 如果它是安全的AP。
这是一个演示该技术的片段方法:
我使用单个enum TEncMode encMode
来表示switch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;
现在我们根据我们的要求配置了新的AP。 现在让我们创建它:
仅创建新AP
.... 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 } }
如果你跳过这个实现,关闭WiFi关闭你创建的AP将消失m_WifiManager.saveConfiguration();
到目前为止,我们可以等待android连接到我们的新AP,或者我们可以自己做
创建并连接到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;
}
就这样。 肯定你可以听取WiFi状态改变以捕获CONNECTED
事件。 因为我们不知道设备连接到您的AP需要多长时间。 但我们禁用了所有其他AP并启用了新AP。 我们可以从谷歌获得HTTP响应,以确保我们的AP有互联网。
要我添加这个方法:
/**
* 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();
}
我唯一知道的是检查IP地址以确定您的连接位置。 我认为选择SSID需要使用设备的接口(即向WiFi服务发出意图而不是自己选择)。
为了它的价值,检测我连接的位置,我使用这样的东西:
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);
}
}
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