3

我已经设法扫描无线网络并在我的应用程序中获得扫描结果。但是有没有办法我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,无论其加密类型如何?

有任何想法吗?谢谢

4

2 回答 2

3

要连接到 WiFi AP,需要执行以下步骤:

  1. 扫描 WiFi

    确保您有合适的 AP。请记住,您必须为受保护的 AP 提供密码。假设您知道自己喜欢的女巫 AP,现在我们将进行其他步骤:

  2. 创建新的个人资料

    我们需要必须支持以下信息:

什么类型的 AP 应该是: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 - 接入点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 single enum TEncMode encModefor 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:

  1. 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   
            }
        }
    

如果您跳过此实现,关闭 WiFi 后,您创建的 AP 将消失 m_WifiManager.saveConfiguration();

到目前为止一切顺利,我们可以等待android连接到我们的新AP,或者我们可以自己做

  1. 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;
     }
    

枚举 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。确保您可以监听 WiFi 状态更改为捕获CONNECTED事件。因为我们不知道设备连接到您的 AP 需要多长时间。但是我们禁用了所有其他 AP 并启用了新的 AP。在我们可以从谷歌获得 HTTP 响应以确保我们的 AP 有互联网之后。

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();
}
于 2012-10-19T13:16:53.613 回答
1

我唯一知道的是检查 IP 地址以确定您的连接位置。我想选择 SSID 需要使用设备的接口(即向 WiFi 服务发出意图,而不是做你自己的选择器)。

对于它的价值,为了检测我连接的位置,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);
            }
    }
于 2012-10-19T12:13:12.083 回答