Load Data from SOAP web service in Android Application

Last updated on January 5th, 2020 at 07:15 pm

Web Service is used to load data from server in your Application. In some of my last posts i explain how to create, read and send data to server from your android application but all service’s are JSON based. In this post i explain you how to load and send data from SOAP web service in your android application.

What is SOAP?

SOAP is a standards-based web services technology that allows providers to abstract data and transport implementations over the web. It relies on Extensible Markup Language (XML) for its message format, and usually relies on other Application Layer protocols, most notably Hypertext Transfer Protocol (HTTP) and Simple Mail Transfer Protocol (SMTP), for message negotiation and transmission

SOAP web service in Android Application

Step 1. Create new project in Android Studio / Eclipse.

Step 2. Before we start creating our project we need external library for SOAP to load data from SOAP based web service. I use KSOAP2 library to load and send data to service You download from here.

Step 3. After download you need to add KSOAP2 library in your project in android studio paste your KSOAP2.jar file in libs folder inside app folder

Step 4. Now open your AndroidManifest.xml and add permission of internet to request server and get data.

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

Step 5. Now open your activity_main.xml file inside layout folder. Here i create a form in which i send data to server and get response.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Celsius" />

    <EditText
        android:id="@+id/cel"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/bt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Calculate" />
</LinearLayout>

Step 6. Now open your MainActivity.java file. Here we request to server we use Async task to request server. Note i am using w3school soap url for example [http://www.w3schools.com/webservices/tempconvert.asmx].

 

package com.trinitysoap;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;


public class MainActivity extends ActionBarActivity {

    String TAG = "Response";
    Button bt;
    EditText celcius;
    String getCel;
    SoapPrimitive resultString;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        bt = (Button) findViewById(R.id.bt);
        celcius = (EditText) findViewById(R.id.cel);


        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                getCel = celcius.getText().toString();
                AsyncCallWS task = new AsyncCallWS();
                task.execute();
            }
        });
    }

    private class AsyncCallWS extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            Log.i(TAG, "onPreExecute");
        }

        @Override
        protected Void doInBackground(Void... params) {
            Log.i(TAG, "doInBackground");
            calculate();
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            Log.i(TAG, "onPostExecute");
            Toast.makeText(MainActivity.this, "Response" + resultString.toString(), Toast.LENGTH_LONG).show();
        }

    }

    public void calculate() {
        String SOAP_ACTION = "http://www.w3schools.com/webservices/CelsiusToFahrenheit";
        String METHOD_NAME = "CelsiusToFahrenheit";
        String NAMESPACE = "http://www.w3schools.com/webservices/";
        String URL = "http://www.w3schools.com/webservices/tempconvert.asmx";

        try {
            SoapObject Request = new SoapObject(NAMESPACE, METHOD_NAME);
            Request.addProperty("Celsius", getCel);

            SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
            soapEnvelope.dotNet = true;
            soapEnvelope.setOutputSoapObject(Request);

            HttpTransportSE transport = new HttpTransportSE(URL);

            transport.call(SOAP_ACTION, soapEnvelope);
            resultString = (SoapPrimitive) soapEnvelope.getResponse();

            Log.i(TAG, "Result Celsius: " + resultString);
        } catch (Exception ex) {
            Log.e(TAG, "Error: " + ex.getMessage());
        }
    }
}

calculate() method is main method in above code in this we create SOAP request and set parameter [Request.addProperty(“Key”, “value”)] and request to server

public void calculate() {
        String SOAP_ACTION = "http://www.w3schools.com/webservices/CelsiusToFahrenheit";
        String METHOD_NAME = "CelsiusToFahrenheit";
        String NAMESPACE = "http://www.w3schools.com/webservices/";
        String URL = "http://www.w3schools.com/webservices/tempconvert.asmx";

        try {
            SoapObject Request = new SoapObject(NAMESPACE, METHOD_NAME);
            Request.addProperty("Celsius", getCel);

            SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
            soapEnvelope.dotNet = true;
            soapEnvelope.setOutputSoapObject(Request);

            HttpTransportSE transport = new HttpTransportSE(URL);

            transport.call(SOAP_ACTION, soapEnvelope);
            resultString = (SoapPrimitive) soapEnvelope.getResponse();

            Log.i(TAG, "Result Celsius: " + resultString);
        } catch (Exception ex) {
            Log.e(TAG, "Error: " + ex.getMessage());
        }
    }