Android 开发系列7 判断上网方式(Wifi还是数据流量)

首先要在AndroidManifest.xml加上权限：

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

判断有无网络连接：

ConnectivityManager mConnectivity = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); 
TelephonyManager mTelephony = (TelephonyManager)this.getSystemService(TELEPHONY_SERVICE); 
//检查网络连接 
NetworkInfo info = mConnectivity.getActiveNetworkInfo(); 

if (info == null || !mConnectivity.getBackgroundDataSetting()) { 
return false; 
}

检查网络类型：

int netType = info.getType(); 
int netSubtype = info.getSubtype(); 

if (netType == ConnectivityManager.TYPE_WIFI) {  //WIFI
   return info.isConnected(); 
} else if (netType == ConnectivityManager.TYPE_MOBILE && netSubtype == TelephonyManager.NETWORK_TYPE_UMTS && !mTelephony.isNetworkRoaming()) {   //MOBILE
   return info.isConnected(); 
} else { 
   return false; 
}

判断WiFi是否已连接：

/**
   * make true current connect service is wifi
   * @param mContext
   * @return
   */
  private static boolean isWifi(Context mContext) {
    ConnectivityManager connectivityManager = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
    if (activeNetInfo != null && activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {
      return true;
    }
    return false;
  }

判断WiFi和移动流量是否已连接：

public static boolean checkNetworkConnection(Context context)
    {
        final ConnectivityManager connMgr = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);

        final android.net.NetworkInfo wifi =connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        final android.net.NetworkInfo mobile =connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

        if(wifi.isAvailable()||mobile.isAvailable())  //getState()方法是查询是否连接了数据网络
            return true;
        else
            return false;
    }

只判断移动网络连接是否正常：

<span style="font-family: Arial, Helvetica, sans-serif;">public boolean isMobileConnected(Context context) {  
</span><span style="font-family: Arial, Helvetica, sans-serif;">        if (context != null) {  </span>

ConnectivityManager mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);  
            NetworkInfo mMobileNetworkInfo = mConnectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);   //获取移动网络信息
            if (mMobileNetworkInfo != null) {  
                return mMobileNetworkInfo.isAvailable();    //getState()方法是查询是否连接了数据网络
            }  
        }  
        return false;  
    }