9

在我的应用程序中，我想为用户提供选择 wi-fi / GPRS 以连接到 Web 服务器的选项。可能是以下问题的答案解决了我的问题... 1.如何检查当前启用的默认网络连接选项。2. 如何在用户选择时启用 wi-fi/GPRS 或（如果用户选择 GPRS，则禁用 wi-fi - 如果 GPRS 工作仅需要此选项）

还是有其他方法可以做到这一点？

4

3 回答 3

14

试试这个：

ConnectivityManager connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

if (mWifi.isConnected())
    //if wifi connected
}

ConnectivityManager connManager1 = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo mMobile = connManager1.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

if (mMobile.isConnected()) {
    //if internet connected
}

不要忘记在清单文件中添加这些权限；

android.permission.CHANGE_WIFI_STATE
android.permission.ACCESS_WIFI_STATE
android.permission.UPDATE_DEVICE_STATS
android.permission.CHANGE_NETWORK_STATE
android.permission.ACCESS_NETWORK_STATE
android.permission.MODIFY_PHONE_STATE
android.permission.READ_PHONE_STATE

要启用或禁用 Wifi，请使用mWiFi.setWifiEnabled(true|false)

要启用/禁用 GPRS/3G，请使用以下代码片段。

void turnData(boolean ON) throws Exception
{

if(bv == Build.VERSION_CODES.FROYO)
{

    Log.i("version:", "Found Froyo");
    try{ 
        Method dataConnSwitchmethod;
        Class telephonyManagerClass;
        Object ITelephonyStub;
        Class ITelephonyClass;
        TelephonyManager telephonyManager = (TelephonyManager) getApplicationContext().getSystemService(Context.TELEPHONY_SERVICE);

        telephonyManagerClass = Class.forName(telephonyManager.getClass().getName());
    Method getITelephonyMethod = telephonyManagerClass.getDeclaredMethod("getITelephony");
    getITelephonyMethod.setAccessible(true);
    ITelephonyStub = getITelephonyMethod.invoke(telephonyManager);
    ITelephonyClass = Class.forName(ITelephonyStub.getClass().getName());

    if (ON) {
         dataConnSwitchmethod = ITelephonyClass.getDeclaredMethod("enableDataConnectivity"); 

    } else {
        dataConnSwitchmethod = ITelephonyClass.getDeclaredMethod("disableDataConnectivity");
    }
    dataConnSwitchmethod.setAccessible(true);
    dataConnSwitchmethod.invoke(ITelephonyStub);
    }catch(Exception e){
          Log.e("Error:",e.toString());
    }

}
 else
{
   Log.i("version:", "Found Gingerbread+");
   final ConnectivityManager conman = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
   final Class conmanClass = Class.forName(conman.getClass().getName());
   final Field iConnectivityManagerField = conmanClass.getDeclaredField("mService");
   iConnectivityManagerField.setAccessible(true);
   final Object iConnectivityManager = iConnectivityManagerField.get(conman);
   final Class iConnectivityManagerClass =  Class.forName(iConnectivityManager.getClass().getName());
   final Method setMobileDataEnabledMethod = iConnectivityManagerClass.getDeclaredMethod("setMobileDataEnabled", Boolean.TYPE);
   setMobileDataEnabledMethod.setAccessible(true);
   setMobileDataEnabledMethod.invoke(iConnectivityManager, ON);
}

}

于 2012-07-26T05:50:25.693 回答
3

您可以使用以下代码块在屏幕上为用户提供选项......

 public static ShowAvailable() 
 {
   ConnectivityManager connectivityMgr = (ConnectivityManager)
   getSystemService(Context.CONNECTIVITY_SERVICE);
   NetworkInfo[] nwInfos = connectivityMgr.getAllNetworkInfo(); 
       for (NetworkInfo nwInfo : nwInfos)  
          {  
             Log.d(TAG, "Network Type Name: " +
             nwInfo.getTypeName());   Log.d(TAG, "Network available: " +
             nwInfo.isAvailable());   Log.d(TAG, "Network c_or-c: " +
             nwInfo.isConnectedOrConnecting());   Log.d(TAG, "Network connected: "
             + nwInfo.isConnected()); 
          }

}
于 2012-07-26T05:50:35.267 回答
1

Continuing the @rIHaN JiTHiN answer, it should be noted that two permissions android.permission.UPDATE_DEVICE_STATS and android.permission.MODIFY_PHONE_STATE are only granted to system app (as it is initially set in Eclipse or Android Studio). So if someone will be faced with this issue, look at this solution.

于 2014-04-30T22:20:30.447 回答