Question

我正在使用这个asynctask类来更新Sql Server上的两个不同的表到目前为止这段代码工作得很好我对这个类的更好和更充分的代码结构感兴趣特别在doinbackground()是否可以在单个线程中调用多个webservices方法？任何人都可以建议我吗？

        private class Update extends AsyncTask<Void, Void, Integer> {
        private final int FAILED_INVALID_RESPONSE = 0;
        private final int SUCCESS_GET_DATA = 1;
        ProgressDialog progress;
        private String _phoneno;
        private String _ticket;
        UpdateTicket(String phoneno,String ticket){
            _phoneno=phoneno;
            _ticket=ticket;
        }
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            progress = ProgressDialog.show(XYZ.this, "",
                    "In Progress...", false);
        }

        @Override
        protected Integer doInBackground(Void... params) {
            method1(_phoneno);
            return  method2(_phoneno,_ticket);
        }
        @Override
        protected void onPostExecute(Integer result) {
            progress.dismiss();
            switch (result) {
                case FAILED_INVALID_RESPONSE:
                    Toast.makeText(XYZ.this,"Please Check your Internet Connection.",Toast.LENGTH_SHORT).show();
                    break;
                case SUCCESS_GET_DATA:
                    Toast.makeText(XYZ.this, "Success!", Toast.LENGTH_SHORT).show();
                    break;
            }
        }
        int  method1(String phoneno,String tickets)
        {
            final  String methodname = "firstmethod";
            final  String NAMESPACE ="http://tempuri.org/";
            final  String URL="www.sampleurl.com";
            final  String SOAP_ACTION="http://tempuri.org/firstmethod";
            int success=0;
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
            SoapObject request = new SoapObject(NAMESPACE, methodname);
            SoapSerializationEnvelope envelope = new  SoapSerializationEnvelope(SoapEnvelope.VER11);
            envelope.dotNet = true;
            request.addProperty("phoneno", phoneno);
            request.addProperty("tickets", tickets);
            envelope.setOutputSoapObject(request);

            HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
            try{
                androidHttpTransport.call(SOAP_ACTION,envelope);
                SoapObject response = (SoapObject) envelope.bodyIn;
            if(response!=null){
                success=1;
            }
            }
            catch (Exception e)
            {
                e.printStackTrace();

            }

            return success;
        }
        int  method2(String Phone) {
            final  String methodname = "secondmethod";
            final  String NAMESPACE ="http://tempuri.org/";
            final  String URL="www.sampleurl.com";
            final  String SOAP_ACTION="http://tempuri.org/secondmethod";
            int success=0;
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
            SoapObject request = new SoapObject(NAMESPACE, methodname);
            SoapSerializationEnvelope envelope = new  SoapSerializationEnvelope(SoapEnvelope.VER11);
            envelope.dotNet = true;
            request.addProperty("phoneno", phoneno);
            envelope.setOutputSoapObject(request);
            HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
            try{
                androidHttpTransport.call(SOAP_ACTION,envelope);
                SoapObject response = (SoapObject) envelope.bodyIn;
            if(response!=null){
                success=1;
            }
            }
            catch (Exception e)
            {
                e.printStackTrace();

            }

            return success;
        }



    }

Answer 1

AsyncTask只能用于需要几秒钟的任务/操作。

AsyncTasks在单个后台线程（来自API 11）上串行执行。因此，长时间跑步的工人可以阻止他人。

检查其他gotchas。

看看HeandlerThread。

在android中有多个请求的异步任务

1 个答案: