android 检测 wifi 3G 网络 状态

// 获取连接管理器ConnectivityManager conMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);// 获取管理器的活动网络信息对象NetworkInfo activeInfo = conMgr.getActiveNetworkInfo();if (activeInfo != null && activeInfo.isConnected()){// 查看网络连接类型 wifiConnected = activeInfo.getType() == ConnectivityManager.TYPE_WIFI;  mobileConnected = activeInfo.getType() == ConnectivityManager.TYPE_MOBILE;  // wifi 连接   if(wifiConnected){    // ...  } else{ // 3G 网络连接    // ...  }}