Question

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？

有什么想法吗？感谢

Answer 1

要连接到实施以下步骤所需的WiFi AP：

扫描WiFi

确保您有合适的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：

AP应该是什么类型 ：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 - 优先级决定了给网络的偏好选择与之相关的接入点时，通过wpa_supplicant associate（我设置默认值为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enum TEncMode encMode作为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：

仅创建新的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   
        }
    }

如果您跳过此实施，在关闭WiFi后，您创建的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，或者我们自己可以做到这一点

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;
}

这就是全部。当然，您可以收听WiFi状态更改以捕获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();
}

Answer 2

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做自己的选择器）。

对于它的价值，要检测我连接的位置，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);
            }
    }

如何在android中连接到无线网络？

2 个答案: