/**   * 判斷當前是否是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;   } }

public static boolean isNetworkAvailable(Context context) {  ConnectivityManager cm = (ConnectivityManager) context   .getSystemService(Context.CONNECTIVITY_SERVICE);  if (cm == null) {  } else {　　　　　　　//如果僅僅是用來判斷網絡連接　　　　　　 //則可以使用 cm.getActiveNetworkInfo().isAvailable();   NetworkInfo[] info = cm.getAllNetworkInfo();   if (info != null) {   for (int i = 0; i < info.length; i++) {    if (info[i].getState() == NetworkInfo.State.CONNECTED) {    return true;    }   }   }  }  return false;  } 

 public static boolean isGpsEnabled(Context context) {  LocationManager lm = ((LocationManager) context   .getSystemService(Context.LOCATION_SERVICE));  List<String> accessibleProviders = lm.getProviders(true);  return accessibleProviders != null && accessibleProviders.size() > 0;  } 

public static boolean isWifiEnabled(Context context) {  ConnectivityManager mgrConn = (ConnectivityManager) context   .getSystemService(Context.CONNECTIVITY_SERVICE);  TelephonyManager mgrTel = (TelephonyManager) context   .getSystemService(Context.TELEPHONY_SERVICE);  return ((mgrConn.getActiveNetworkInfo() != null && mgrConn   .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel   .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);  } 

 public static boolean is3rd(Context context) {  ConnectivityManager cm = (ConnectivityManager) context   .getSystemService(Context.CONNECTIVITY_SERVICE);  NetworkInfo networkINfo = cm.getActiveNetworkInfo();  if (networkINfo != null   && networkINfo.getType() == ConnectivityManager.TYPE_MOBILE) {   return true;  }  return false;  } 

public static boolean isWifi(Context context) {   ConnectivityManager cm = (ConnectivityManager) context    .getSystemService(Context.CONNECTIVITY_SERVICE);   NetworkInfo networkINfo = cm.getActiveNetworkInfo();   if (networkINfo != null    && networkINfo.getType() == ConnectivityManager.TYPE_WIFI) {   return true;   }   return false;  }