使用Android（Java）连接到开放网络

Question

我调查了不同的帖子或网站，以帮助我开发一个可以连接到开放wifi网络（名称：OpenWrt）的应用。除非之前手动进行操作，否则无法连接该应用程序。有人可以调查一下并帮助我吗？ :)我也许应该将网络添加到电话上的网络列表中，但是如果有问题，我不确定该怎么做。

谢谢！

package com.example.wificonnect;

import java.util.List;
import android.app.Activity;    
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.content.Context;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Définition du réseau wifi auquel on se connecte
    String networkSSID = "\"OpenWrt\"";

    WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);

    // Configuration des paramètres de connexion
    WifiConfiguration conf = new WifiConfiguration();

    conf.SSID = networkSSID;                                                
    conf.wepTxKeyIndex = 0;
    conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
    conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40); 
    conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);

    // Activation du wifi si pas encore activé
    if(wifiManager.isWifiEnabled()) {
        wifiManager.setWifiEnabled(false);
    }
    else {
        wifiManager.setWifiEnabled(true);
    }

    int netId = wifiManager.addNetwork(conf);
    wifiManager.enableNetwork(netId, true);
    wifiManager.setWifiEnabled(true);

  }
}

我也添加权限：

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

编辑：wifi激活后，是否应该添加类似的内容？

int networkId = -1;
    if(wifiManager.getConfiguredNetworks() != null) {
        for (WifiConfiguration configuredNetwork : wifiManager.getConfiguredNetworks()) {
            if (conf.SSID.equals(configuredNetwork.SSID)) {
                networkId = configuredNetwork.networkId;
                Log.i(LOG_TAG, "Network already registered : " + networkId);
            }
        }
    }

    if (networkId == -1) {
        networkId = wifiManager.addNetwork(conf);
        Log.i(LOG_TAG, "Network registered : " + networkId);
    } else {
        wifiManager.updateNetwork(conf);
    }

wifiManager.enableNetwork(networkId, true);

Answer 1

首先获取开放网络的ScanResult对象。

然后您可以使用此方法。我为您创建的。

public void connect(Context context, ScanResult scanResult){

    WifiManagersingletonWifiManager = (WifiManager)context
                                      .getApplicationContext()
                                      .getSystemService(Context.WIFI_SERVICE);

    configuration = new WifiConfiguration();
    configuration.SSID = scanResult.SSID;
    configuration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);

    int networkId = singletonWifiManager.addNetwork(configuration);

    if(!singletonWifiManager.isWifiEnabled())
        singletonWifiManager.setWifiEnabled(true);

    singletonWifiManager.disconnect();
    singletonWifiManager.enableNetwork(networkId,true);
    singletonWifiManager.reconnect();
}

也不要忘记在清单文件中声明权限。

<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_COARSE_LOCATION"/>