在较低的互联网带宽中使用AsyncTask crush应用程序的httppost

Question

我是从ConnectivityManager和wifi过来的。但这并不能解决我的问题。我们来自互联网带宽较低的国家。虽然数据服务已开通，但在某些(每次)时间内没有互联网连接。

因此，数据服务连接和wifi连接的条件不能决定我们的设备是否具有活动的互联网连接。

。。因此，我尝试了使用AsyncTask的http post。但是它不能捕获任何活动的连接。但在活动连接中工作良好。

这是我的代码-

  class RequestTask extends AsyncTask<String, String, String>{

    @Override
    protected String doInBackground(String... uri) {
        String responseString = null;
         try {
        HttpClient httpclient = new DefaultHttpClient();
        HttpResponse response;


            response = httpclient.execute(new HttpGet(uri[0]));
            StatusLine statusLine = response.getStatusLine();
            if(statusLine.getStatusCode() == HttpStatus.SC_OK){
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                response.getEntity().writeTo(out);
                responseString = out.toString();
                out.close();
            } else{
                //Closes the connection.
                //response.getEntity().getContent().close();
                Toast.makeText(getApplicationContext(),"No Internet Connection :", Toast.LENGTH_SHORT).show();

            }
        } catch (ClientProtocolException e) {
            //TODO Handle problems..
            Toast.makeText(getApplicationContext(),"No Internet Connection :", Toast.LENGTH_SHORT).show();
        } catch (IOException e) {
            //TODO Handle problems..
            Toast.makeText(getApplicationContext(),"No Internet Connection :", Toast.LENGTH_SHORT).show();
        }
        catch (Exception e){
            Toast.makeText(getApplicationContext(),"No Internet Connection :", Toast.LENGTH_SHORT).show();
        }
        return responseString;

    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        if(result.equals("null") || result.equals("")){
            Toast.makeText(getApplicationContext(),"Account Not Found : ", Toast.LENGTH_SHORT).show();
        }

        else{

        getpass=result;

        Toast.makeText(getApplicationContext(),"Connecting to Server :", Toast.LENGTH_SHORT).show();

        if(getpass.equals(edtpass.getText().toString())){

                     new RequestTaskname().execute("http://www.yangoninnovation.com/*****?****="+email);
        }
       }
    }
}

当没有互联网连接时，所有的捕获过程都不起作用。请帮帮我。如果http post找不到活动的连接，我想干杯“没有互联网连接”。

Answer 1

如果我错了，请纠正我，但你的问题可以归结为：

• 是否有有效的网络连接

context Context = getContext()；上下文管理器= ( ConnectivityManager ) context.getSystemService(Context.CONNECTIVITY_SERVICE)；NetworkInfo networkInfo = manager.getActiveNetworkInfo()；networkInfo = networkInfo != null && networkInfo.isAvailable() && networkInfo.isConnected()？info : null；//如果networkInfo不是null，则您有网络，否则将引发错误...

• ，如果连接不是wifi，而是其他类型-快速/不快速

//从上面继续，int type = networkInfo.getType()；int subtype = networkInfo.getSubtype()；boolean isFastConnection = false；if (类型== ConnectivityManager.TYPE_WIFI ||类型== ConnectivityManager.TYPE_ETHERNET) { isFastConnection = true；} else if (类型为== ConnectivityManager.TYPE_MOBILE) { switch (子类型){ case TelephonyManager.NETWORK_TYPE_1xRTT: case TelephonyManager.NETWORK_TYPE_CDMA: case TelephonyManager.NETWORK_TYPE_EDGE: case TelephonyManager.NETWORK_TYPE_GPRS: case TelephonyManager.NETWORK_TYPE_IDEN: isFastConnection = false；break；case TelephonyManager.NETWORK_TYPE_EVDO_0: case TelephonyManager.NETWORK_TYPE_EVDO_A: case TelephonyManager.NETWORK_TYPE_HSDPA: case TelephonyManager.NETWORK_TYPE_HSPA: case TelephonyManager.NETWORK_TYPE_HSUPA: case TelephonyManager.NETWORK_TYPE_UMTS: case TelephonyManager.NETWORK_TYPE_EVDO_B: // API 11 case TelephonyManager.NETWORK_TYPE_EHRPD：案例TelephonyManager.NETWORK_TYPE_LTE: // API 13案例TelephonyManager.NETWORK_TYPE_HSPAP: isFastConnection = true；break；default: isFastConnection = false；break；}} //为您的案例处理isFastConnection布尔值