At first write a web service in java and deploy it in the tomcat Server. Let us see an example of a simple java web service below. First of all learn how to create a simple java web service.
package com.android.ws;
public class Hello {
public String HelloAll(){
return "Hello All";
}
}
Now the web service part is ready and is deployed in the server. Next let us see on how to access and invoke this service from the android application using SOAP. Download ksoap2 library file from the below link and add it in the lib folder of your project.
MainActivity.java
We have to start a new thread to connect to the internet for android after versions 3.
import android.widget.TextView;
import android.app.Activity;
import android.os.Bundle;
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 Activity {
private static final String SOAP_ACTION = "http://ws.android.com/HelloAll";
private static final String METHOD_NAME = "HelloAll";
private static final String NAMESPACE = "http://ws.android.com/";
private static final String URL = "http://172.27.192.36:8080/webservicetest/services/HelloAll?wsdl";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Thread networkThread = new Thread() {
@Override
public void run() {
try {
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
HttpTransportSE ht = new HttpTransportSE(URL);
ht.call(SOAP_ACTION, envelope);
final SoapPrimitive response = (SoapPrimitive)envelope.getResponse();
final String hello = response.toString();
runOnUiThread (new Runnable(){
public void run() {
TextView result;
result = (TextView)findViewById(R.id.textView1);
result.setText(hello);
}
});
}
catch (Exception e) {
e.printStackTrace();
}
}
};
networkThread.start();
}
}
}
Please find some important tips below to work great on this.
SOAP_ACTION is the "NAMESPACE/METHOD_NAME" mentioned in the above program.
METHOD_NAME is HelloAll in the WSDL File <wsdl:operation name="HelloAll">.
NAMESPACE is the targetNamespace in the WSDL File. Just add "/" in the end.
URL is the URL of the WSDL File. In the above code units you can see my ip address and kindly replace it with your own ip address. Never give it as localhost in the URL of the android code above. It does not take as localhost. Kindly give your own ip address. Make sure that the web service is also running on the same ip. If the web service part is deployed in some other server, then give the ip address of the corresponding server in the url part above and thats it.
Please find below the android manifest.xml file.
Just add uses permission for internet in the manifest file.
<manifest android:versioncode="1" android:versionname="1.0" package="com.android.ws" xmlns:android="http://schemas.android.com/apk/res/android">
<uses-sdk android:minsdkversion="15">
<application android:icon="@drawable/ic_launcher" android:label="@string/app_name">
<activity android:label="@string/app_name" android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN">
<category android:name="android.intent.category.LAUNCHER">
</category></action></intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
</uses-sdk></manifest>
Thats all for this and just start to rock. Have a nice day dear.
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