检查是否wifi 连接还是 mibile data 连接

ConnectivityManager connMgr = (ConnectivityManager)         getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo networkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI); boolean isWifiConn = networkInfo.isConnected();networkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);boolean isMobileConn = networkInfo.isConnected();Log.d(DEBUG_TAG, "Wifi connected: " + isWifiConn);Log.d(DEBUG_TAG, "Mobile connected: " + isMobileConn);

public boolean isOnline() {    ConnectivityManager connMgr = (ConnectivityManager)             getSystemService(Context.CONNECTIVITY_SERVICE);    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();    return (networkInfo != null && networkInfo.isConnected());}