以编程方式连接 Android WiFi答案

【问题标题】：Android WiFi connection programmatically以编程方式连接 Android WiFi
【发布时间】：2011-06-29 07:47:03
【问题描述】：

您知道如何在我的 Android 应用程序中通过发送密码建立 wifi 连接吗？

【问题讨论】：

【解决方案1】：

将 SSID 及其密码传递给以下方法。

public void connectToAP(String ssid, String passkey) {
    Log.i(TAG, "* connectToAP");

    WifiConfiguration wifiConfiguration = new WifiConfiguration();

    String networkSSID = ssid;
    String networkPass = passkey;

    Log.d(TAG, "# password " + networkPass);

    for (ScanResult result : scanResultList) {
        if (result.SSID.equals(networkSSID)) {

            String securityMode = getScanResultSecurity(result);

            if (securityMode.equalsIgnoreCase("OPEN")) {

                wifiConfiguration.SSID = "\"" + networkSSID + "\"";
                wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
                int res = wifiManager.addNetwork(wifiConfiguration);
                Log.d(TAG, "# add Network returned " + res);

                boolean b = wifiManager.enableNetwork(res, true);
                Log.d(TAG, "# enableNetwork returned " + b);

                wifiManager.setWifiEnabled(true);

            } else if (securityMode.equalsIgnoreCase("WEP")) {

                wifiConfiguration.SSID = "\"" + networkSSID + "\"";
                wifiConfiguration.wepKeys[0] = "\"" + networkPass + "\"";
                wifiConfiguration.wepTxKeyIndex = 0;
                wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
                wifiConfiguration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
                int res = wifiManager.addNetwork(wifiConfiguration);
                Log.d(TAG, "### 1 ### add Network returned " + res);

                boolean b = wifiManager.enableNetwork(res, true);
                Log.d(TAG, "# enableNetwork returned " + b);

                wifiManager.setWifiEnabled(true);
            }

            wifiConfiguration.SSID = "\"" + networkSSID + "\"";
            wifiConfiguration.preSharedKey = "\"" + networkPass + "\"";
            wifiConfiguration.hiddenSSID = true;
            wifiConfiguration.status = WifiConfiguration.Status.ENABLED;
            wifiConfiguration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
            wifiConfiguration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
            wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
            wifiConfiguration.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
            wifiConfiguration.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
            wifiConfiguration.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
            wifiConfiguration.allowedProtocols.set(WifiConfiguration.Protocol.WPA);

            int res = wifiManager.addNetwork(wifiConfiguration);
            Log.d(TAG, "### 2 ### add Network returned " + res);

            wifiManager.enableNetwork(res, true);

            boolean changeHappen = wifiManager.saveConfiguration();

            if(res != -1 && changeHappen){
                Log.d(TAG, "### Change happen");

                AppStaticVar.connectedSsidName = networkSSID;

            }else{
                Log.d(TAG, "*** Change NOT happen");
            }

            wifiManager.setWifiEnabled(true);
        }
    }
}

public String getScanResultSecurity(ScanResult scanResult) {
    Log.i(TAG, "* getScanResultSecurity");

    final String cap = scanResult.capabilities;
    final String[] securityModes = { "WEP", "PSK", "EAP" };

    for (int i = securityModes.length - 1; i >= 0; i--) {
        if (cap.contains(securityModes[i])) {
            return securityModes[i];
        }
    }

    return "OPEN";
}

不要忘记在 Manifest 文件中添加必要的权限。

【讨论】：

这段代码无法编译，scanResultList和wifiManager这两个变量是在哪里定义的？
您需要获取 WifiManager wifiManager (Context.getSystemService(Context.WIFI_SERVICE)) 并对其进行调用 (wifiMananger.getScanResults()) 以获取 scanResultList 变量。上面的代码假设您已经有一个可用网络列表。

【解决方案2】：

100% 有效。

通过这种方式，您可以连接到您的特定 Wifi MainActivity.java 的这段代码

//////////// >>> Wifi 连接 (WP2)

        WifiConfiguration wifiConfig = new WifiConfiguration();

        wifiConfig.SSID = String.format("\"%s\"", "Wifi name");
        wifiConfig.preSharedKey = String.format("\"%s\"", "Wifi password");

        WifiManager wifiManager=(WifiManager)getSystemService(WIFI_SERVICE);
        int netId = wifiManager.addNetwork(wifiConfig);
        wifiManager.disconnect();
        wifiManager.enableNetwork(netId, true);
        wifiManager.reconnect();

并且不要忘记将此代码包含到您的 AndroidManifest.xml 中

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />

【讨论】：

【解决方案3】：

AnujAroshA 这里发布的代码真的很有帮助。但是缺少一个 else 案例：

  ..
  } else if (securityMode.equalsIgnoreCase("PSK")) {
    // PSK code
  ..

否则 PSK 代码也会针对 WEP 和 OPEN 网络执行。

在我看来，代码风格并不是最佳的。不需要创建两个字符串 networkSSID 和 networkPass。您可以简单地使用 ssid 或密码。

建议：拆分创建wifi配置和连接方法。

(1) WifiConfiguration的创建方法：

private WifiConfiguration createAPConfiguration(String networkSSID, String networkPasskey, String securityMode) {
        WifiConfiguration wifiConfiguration = new WifiConfiguration();

        wifiConfiguration.SSID = "\"" + networkSSID + "\"";

        if (securityMode.equalsIgnoreCase("OPEN")) {

            wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);

        } else if (securityMode.equalsIgnoreCase("WEP")) {

            wifiConfiguration.wepKeys[0] = "\"" + networkPasskey + "\"";
            wifiConfiguration.wepTxKeyIndex = 0;
            wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
            wifiConfiguration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);

        } else if (securityMode.equalsIgnoreCase("PSK")) {

            wifiConfiguration.preSharedKey = "\"" + networkPasskey + "\"";
            wifiConfiguration.hiddenSSID = true;
            wifiConfiguration.status = WifiConfiguration.Status.ENABLED;
            wifiConfiguration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
            wifiConfiguration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
            wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
            wifiConfiguration.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
            wifiConfiguration.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
            wifiConfiguration.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
            wifiConfiguration.allowedProtocols.set(WifiConfiguration.Protocol.WPA);

        } else {
            Log.i(TAG, "# Unsupported security mode: "+securityMode);

            return null;
        }

        return wifiConfiguration;

    }

(2) AP连接方法：

    public int connectToAP(String networkSSID, String networkPasskey) {
    for (ScanResult result : scanResultList) {

        if (result.SSID.equals(networkSSID)) {

            String securityMode = getScanResultSecurity(result);

            WifiConfiguration wifiConfiguration = createAPConfiguration(networkSSID, networkPasskey, securityMode);

            int res = wifiManager.addNetwork(wifiConfiguration);
            Log.d(TAG, "# addNetwork returned " + res);

            boolean b = wifiManager.enableNetwork(res, true);
            Log.d(TAG, "# enableNetwork returned " + b);

            wifiManager.setWifiEnabled(true);

            boolean changeHappen = wifiManager.saveConfiguration();

            if (res != -1 && changeHappen) {
                Log.d(TAG, "# Change happen");
                connectedSsidName = networkSSID;
            } else {
                Log.d(TAG, "# Change NOT happen");
            }

            return res;
        }
    }

    return -1;
}

(3) AnujAroshA 发布的扫描方法 100%。

public String getScanResultSecurity(ScanResult scanResult) {

    final String cap = scanResult.capabilities;
    final String[] securityModes = { "WEP", "PSK", "EAP" };

    for (int i = securityModes.length - 1; i >= 0; i--) {
        if (cap.contains(securityModes[i])) {
            return securityModes[i];
        }
    }

    return "OPEN";
}

【讨论】：

【解决方案4】：

提供你的 ssid 和密码

    fun connectToWifi(ssid: String, password: String) {
    val connManager = context!!.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
    val networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
    val wifiConfiguration = WifiConfiguration()
    wifiConfiguration.SSID = String.format("\"%s\"", ssid)
    wifiConfiguration.preSharedKey = String.format("\"%s\"", password)
    wifiManager = context!!.getSystemService(Context.WIFI_SERVICE) as WifiManager
    val netId: Int = wifiManager.addNetwork(wifiConfiguration)
    wifiManager.disconnect()
    wifiManager.enableNetwork(netId, true)
    wifiManager.reconnect()
    val config = WifiConfiguration()
    config.SSID == "\"\"" + ssid + "\"\""
    config.preSharedKey == "\"\"" + password + "\"\""
    wifiManager.addNetwork(config)
}

【讨论】：