How to avoid making a lot of asynkTask class for calling single hit in android

In android, When we want to get data from web server then we have to send some request to the server by web services for transferring files such as XML and JSON and HttpTransportSE for a hit to the server.

If you are making any e-commerce app or anything where you have to get the response from different-different API functions then you have to make many asyncTask for calling to the server and getting the response to the server.
For example – We are making an app where we have 3 activity(activity1, activity2, activity3)activity1 is for getting home data by getHome() apiFunctionName, activity2 is for getting some category data by getCategory() and activity3 for showing productData by showProduct() apiFunctionName.

activity1.java

import org.json.JSONObject;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;

	public class activity1 extends Activity{

		protected void onCreate(Bundle bundle) {
			super.onCreate(bundle);
			setContentView(R.layout.activity_home); //your xml file
			// call home connection class 
			HomeConnection Object = new HomeConnection();
			Object.execute();
		}

		class HomeConnection extends AsyncTask < String, String, Object > {

			private Object mainResponse;

			@Override
			protected String doInBackground(String...arguments) {
				try {

					HttpTransportSE ht = getHttpTransportSE();
					
					//request for Home data
					SoapObject mainRequest = new SoapObject(NAMESPACE, "getHome");// api function name
					SoapSerializationEnvelope requestEnvelop = getSoapSerializationEnvelope(mainRequest);
					JSONObject jo = new JSONObject();
					jo.put("some", "data"); // some data send to server 
					String jsonAsString = jo.toString();
					PropertyInfo stringArrayPropertyInfo = new PropertyInfo();
					stringArrayPropertyInfo.setName("attributes");
					stringArrayPropertyInfo.setValue(jsonAsString);
					stringArrayPropertyInfo.setType(jsonAsString.getClass());
					mainRequest.addProperty(stringArrayPropertyInfo);
					
					// hit to the server by ht.call method
					ht.call(NAMESPACE, requestEnvelop);
					
					//this is your response
					mainResponse = (Object) requestEnvelop.getResponse();

					String mainResponseAsString = mainResponse.toString();

					return mainResponseAsString;
				} catch (Exception e) {
					Log.d("Exception ", e.toString());
e.printStackTrace();
					return "no";
				}
			}

			protected void onPostExecute(Object backresult) {
				super.onPostExecute(backresult);
				try {
					
//					backresult, your response data is there. 
					
					
				} catch (Exception e) {
					Log.d("Error onPostExecute", e.toString());
e.printStackTrace();
				}
			}
		}
		
		public final SoapSerializationEnvelope getSoapSerializationEnvelope(SoapObject request) {
		    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
		    envelope.dotNet = false;
		    envelope.xsd = SoapSerializationEnvelope.XSD;
		    envelope.enc = SoapSerializationEnvelope.ENC;
		    envelope.setOutputSoapObject(request);
		    return envelope;
		}

		public final HttpTransportSE getHttpTransportSE() {
		    HttpTransportSE ht = new HttpTransportSE(yourURL,60000);
		    ht.debug = true;
		    ht.setXmlVersionTag("<!--?xml version=\"1.0\" encoding= \"UTF-8\" ?-->");
		    return ht;
		}
	}

import org.json.JSONObject;

import org.ksoap2.SoapEnvelope;

import org.ksoap2.serialization.PropertyInfo;

import org.ksoap2.serialization.SoapObject;

import org.ksoap2.serialization.SoapSerializationEnvelope;

import org.ksoap2.transport.HttpTransportSE;

import android.app.Activity;

import android.os.AsyncTask;

import android.os.Bundle;

import android.util.Log;

public class activity1 extends Activity{

protected void onCreate(Bundle bundle) {

super.onCreate(bundle);

setContentView(R.layout.activity_home); //your xml file

// call home connection class

HomeConnection Object = new HomeConnection();

Object.execute();

}

class HomeConnection extends AsyncTask < String, String, Object > {

private Object mainResponse;

@Override

protected String doInBackground(String...arguments) {

try {

HttpTransportSE ht = getHttpTransportSE();

//request for Home data

SoapObject mainRequest = new SoapObject(NAMESPACE, "getHome");// api function name

SoapSerializationEnvelope requestEnvelop = getSoapSerializationEnvelope(mainRequest);

JSONObject jo = new JSONObject();

jo.put("some", "data"); // some data send to server

String jsonAsString = jo.toString();

PropertyInfo stringArrayPropertyInfo = new PropertyInfo();

stringArrayPropertyInfo.setName("attributes");

stringArrayPropertyInfo.setValue(jsonAsString);

stringArrayPropertyInfo.setType(jsonAsString.getClass());

mainRequest.addProperty(stringArrayPropertyInfo);

// hit to the server by ht.call method

ht.call(NAMESPACE, requestEnvelop);

//this is your response

mainResponse = (Object) requestEnvelop.getResponse();

String mainResponseAsString = mainResponse.toString();

return mainResponseAsString;

} catch (Exception e) {

Log.d("Exception ", e.toString());

e.printStackTrace();

return "no";

}

protected void onPostExecute(Object backresult) {

super.onPostExecute(backresult);

try {

// backresult, your response data is there.

} catch (Exception e) {

Log.d("Error onPostExecute", e.toString());

e.printStackTrace();

}

public final SoapSerializationEnvelope getSoapSerializationEnvelope(SoapObject request) {

SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);

envelope.dotNet = false;

envelope.xsd = SoapSerializationEnvelope.XSD;

envelope.enc = SoapSerializationEnvelope.ENC;

envelope.setOutputSoapObject(request);

return envelope;

}

public final HttpTransportSE getHttpTransportSE() {

HttpTransportSE ht = new HttpTransportSE(yourURL,60000);

ht.debug = true;

ht.setXmlVersionTag("");

return ht;

}

activity2.java

import org.json.JSONObject;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;

	public class activity2 extends Activity{

		protected void onCreate(Bundle bundle) {
			super.onCreate(bundle);
			setContentView(R.layout.activity_category); //your xml file
			// call Category connection class 
			CategoryConnection Object = new CategoryConnection();
			Object.execute();
		}

		class CategoryConnection extends AsyncTask < String, String, Object > {

			private Object mainResponse;

			@Override
			protected String doInBackground(String...arguments) {
				try {

					HttpTransportSE ht = getHttpTransportSE();
					
					//request for Category data
					SoapObject mainRequest = new SoapObject(NAMESPACE, "getCategory");// api function name
					SoapSerializationEnvelope requestEnvelop = getSoapSerializationEnvelope(mainRequest);
					JSONObject jo = new JSONObject();
					jo.put("some", "data"); // some data send to server 
					String jsonAsString = jo.toString();
					PropertyInfo stringArrayPropertyInfo = new PropertyInfo();
					stringArrayPropertyInfo.setName("attributes");
					stringArrayPropertyInfo.setValue(jsonAsString);
					stringArrayPropertyInfo.setType(jsonAsString.getClass());
					mainRequest.addProperty(stringArrayPropertyInfo);
					
					// hit to the server by ht.call method
					ht.call(NAMESPACE, requestEnvelop);
					
					//this is your response
					mainResponse = (Object) requestEnvelop.getResponse();

					String mainResponseAsString = mainResponse.toString();

					return mainResponseAsString;
				} catch (Exception e) {
					Log.d("Exception", e.toString());
					e.printStackTrace();
					return "no";
				}
			}

			protected void onPostExecute(Object backresult) {
				super.onPostExecute(backresult);
				try {
					
//					backresult, your response data is there. 
					
					
				} catch (Exception e) {
					Log.d("Error onPostExecute", e.toString());
					e.printStackTrace();
				}
			}
		}
		
		public final SoapSerializationEnvelope getSoapSerializationEnvelope(SoapObject request) {
		    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
		    envelope.dotNet = false;
		    envelope.xsd = SoapSerializationEnvelope.XSD;
		    envelope.enc = SoapSerializationEnvelope.ENC;
		    envelope.setOutputSoapObject(request);
		    return envelope;
		}

		public final HttpTransportSE getHttpTransportSE() {
		    HttpTransportSE ht = new HttpTransportSE(yourURL,60000);
		    ht.debug = true;
		    ht.setXmlVersionTag("<!--?xml version=\"1.0\" encoding= \"UTF-8\" ?-->");
		    return ht;
		}
	}

import org.json.JSONObject;

import org.ksoap2.SoapEnvelope;

import org.ksoap2.serialization.PropertyInfo;

import org.ksoap2.serialization.SoapObject;

import org.ksoap2.serialization.SoapSerializationEnvelope;

import org.ksoap2.transport.HttpTransportSE;

import android.app.Activity;

import android.os.AsyncTask;

import android.os.Bundle;

import android.util.Log;

public class activity2 extends Activity{

protected void onCreate(Bundle bundle) {

super.onCreate(bundle);

setContentView(R.layout.activity_category); //your xml file

// call Category connection class

CategoryConnection Object = new CategoryConnection();

Object.execute();

}

class CategoryConnection extends AsyncTask < String, String, Object > {

private Object mainResponse;

@Override

protected String doInBackground(String...arguments) {

try {

HttpTransportSE ht = getHttpTransportSE();

//request for Category data

SoapObject mainRequest = new SoapObject(NAMESPACE, "getCategory");// api function name

SoapSerializationEnvelope requestEnvelop = getSoapSerializationEnvelope(mainRequest);

JSONObject jo = new JSONObject();

jo.put("some", "data"); // some data send to server

String jsonAsString = jo.toString();

PropertyInfo stringArrayPropertyInfo = new PropertyInfo();

stringArrayPropertyInfo.setName("attributes");

stringArrayPropertyInfo.setValue(jsonAsString);

stringArrayPropertyInfo.setType(jsonAsString.getClass());

mainRequest.addProperty(stringArrayPropertyInfo);

// hit to the server by ht.call method

ht.call(NAMESPACE, requestEnvelop);

//this is your response

mainResponse = (Object) requestEnvelop.getResponse();

String mainResponseAsString = mainResponse.toString();

return mainResponseAsString;

} catch (Exception e) {

Log.d("Exception", e.toString());

e.printStackTrace();

return "no";

}

protected void onPostExecute(Object backresult) {

super.onPostExecute(backresult);

try {

// backresult, your response data is there.

} catch (Exception e) {

Log.d("Error onPostExecute", e.toString());

e.printStackTrace();

}

public final SoapSerializationEnvelope getSoapSerializationEnvelope(SoapObject request) {

SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);

envelope.dotNet = false;

envelope.xsd = SoapSerializationEnvelope.XSD;

envelope.enc = SoapSerializationEnvelope.ENC;

envelope.setOutputSoapObject(request);

return envelope;

}

public final HttpTransportSE getHttpTransportSE() {

HttpTransportSE ht = new HttpTransportSE(yourURL,60000);

ht.debug = true;

ht.setXmlVersionTag("");

return ht;

}

activity3.java

import org.json.JSONObject;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;

	public class activity3 extends Activity{

		protected void onCreate(Bundle bundle) {
			super.onCreate(bundle);
			setContentView(R.layout.activity_product); //your xml file
			// call Product connection class 
			ProductConnection Object = new ProductConnection();
			Object.execute();
		}

		class ProductConnection extends AsyncTask < String, String, Object > {

			private Object mainResponse;

			@Override
			protected String doInBackground(String...arguments) {
				try {

					HttpTransportSE ht = getHttpTransportSE();
					
					//request for Product data
					SoapObject mainRequest = new SoapObject(NAMESPACE, "showProduct");// api function name
					SoapSerializationEnvelope requestEnvelop = getSoapSerializationEnvelope(mainRequest);
					JSONObject jo = new JSONObject();
					jo.put("some", "data"); // some data send to server 
					String jsonAsString = jo.toString();
					PropertyInfo stringArrayPropertyInfo = new PropertyInfo();
					stringArrayPropertyInfo.setName("attributes");
					stringArrayPropertyInfo.setValue(jsonAsString);
					stringArrayPropertyInfo.setType(jsonAsString.getClass());
					mainRequest.addProperty(stringArrayPropertyInfo);
					
					// hit to the server by ht.call method
					ht.call(NAMESPACE, requestEnvelop);
					
					//this is your response
					mainResponse = (Object) requestEnvelop.getResponse();

					String mainResponseAsString = mainResponse.toString();

					return mainResponseAsString;
				} catch (Exception e) {
					Log.d("Exception", e.toString());
					e.printStackTrace();
					return "no";
				}
			}

			protected void onPostExecute(Object backresult) {
				super.onPostExecute(backresult);
				try {
					
//					backresult, your response data is there. 
					
					
				} catch (Exception e) {
					Log.d("Error onPostExecute", e.toString());
					e.printStackTrace();
				}
			}
		}
		
		public final SoapSerializationEnvelope getSoapSerializationEnvelope(SoapObject request) {
		    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
		    envelope.dotNet = false;
		    envelope.xsd = SoapSerializationEnvelope.XSD;
		    envelope.enc = SoapSerializationEnvelope.ENC;
		    envelope.setOutputSoapObject(request);
		    return envelope;
		}

		public final HttpTransportSE getHttpTransportSE() {
		    HttpTransportSE ht = new HttpTransportSE(yourURL,60000);
		    ht.debug = true;
		    ht.setXmlVersionTag("<!--?xml version=\"1.0\" encoding= \"UTF-8\" ?-->");
		    return ht;
		}
	}

import org.json.JSONObject;

import org.ksoap2.SoapEnvelope;

import org.ksoap2.serialization.PropertyInfo;

import org.ksoap2.serialization.SoapObject;

import org.ksoap2.serialization.SoapSerializationEnvelope;

import org.ksoap2.transport.HttpTransportSE;

import android.app.Activity;

import android.os.AsyncTask;

import android.os.Bundle;

import android.util.Log;

public class activity3 extends Activity{

protected void onCreate(Bundle bundle) {

super.onCreate(bundle);

setContentView(R.layout.activity_product); //your xml file

// call Product connection class

ProductConnection Object = new ProductConnection();

Object.execute();

}

class ProductConnection extends AsyncTask < String, String, Object > {

private Object mainResponse;

@Override

protected String doInBackground(String...arguments) {

try {

HttpTransportSE ht = getHttpTransportSE();

//request for Product data

SoapObject mainRequest = new SoapObject(NAMESPACE, "showProduct");// api function name

SoapSerializationEnvelope requestEnvelop = getSoapSerializationEnvelope(mainRequest);

JSONObject jo = new JSONObject();

jo.put("some", "data"); // some data send to server

String jsonAsString = jo.toString();

PropertyInfo stringArrayPropertyInfo = new PropertyInfo();

stringArrayPropertyInfo.setName("attributes");

stringArrayPropertyInfo.setValue(jsonAsString);

stringArrayPropertyInfo.setType(jsonAsString.getClass());

mainRequest.addProperty(stringArrayPropertyInfo);

// hit to the server by ht.call method

ht.call(NAMESPACE, requestEnvelop);

//this is your response

mainResponse = (Object) requestEnvelop.getResponse();

String mainResponseAsString = mainResponse.toString();

return mainResponseAsString;

} catch (Exception e) {

Log.d("Exception", e.toString());

e.printStackTrace();

return "no";

}

protected void onPostExecute(Object backresult) {

super.onPostExecute(backresult);

try {

// backresult, your response data is there.

} catch (Exception e) {

Log.d("Error onPostExecute", e.toString());

e.printStackTrace();

}

public final SoapSerializationEnvelope getSoapSerializationEnvelope(SoapObject request) {

SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);

envelope.dotNet = false;

envelope.xsd = SoapSerializationEnvelope.XSD;

envelope.enc = SoapSerializationEnvelope.ENC;

envelope.setOutputSoapObject(request);

return envelope;

}

public final HttpTransportSE getHttpTransportSE() {

HttpTransportSE ht = new HttpTransportSE(yourURL,60000);

ht.debug = true;

ht.setXmlVersionTag("");

return ht;

}

Above code will be working well. We can see that for getting 3 api function data from server we have to write 20- 30 line of code in each class for hitting the server.

But if I want to get more and more tasks to retrieve (in different ways) data from the internet and I will not be liking to increase the different classes for each single call.

So avoiding to create multiple classes for each single call, we use Reflection Technique.

I have made a method to prevent increasing of different classes to call the single hit. I have made single async task class and passed functionName and context of the activity and returned response by onPostExecute.

The async task class is there-

AsyncTaskConnection.java

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.json.JSONObject;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;

import webkul.opencart.mobikul.SplashScreen;
import webkul.opencart.mobikul.credentials.AppCredentials;

import android.app.ProgressDialog;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.AsyncTask;
import android.util.Log;

public class AsyncTaskConnection extends AsyncTask<String, String, Object>{
	ProgressDialog progress;
	Object response = null, mainResponse = null;
	JSONObject mainObject;
	Context mContext;
	SharedPreferences configShared;
	public Object customerLoginResponse;
	public Editor editor;
	String returnFunctionName;
	private String pageNumber;
	
	public AsyncTaskConnection (Context context){
         mContext = context;
    }
	 
	protected void onPreExecute() {
		super.onPreExecute();
	}

	@Override
	protected Object doInBackground(String... arguments) {
		String apiFunctionName = arguments[0]; // get api FunctionName
		String jsonString = arguments[1]; // get data which want to send to the server
		returnFunctionName = apiFunctionName+"Response"; // response function name

		try{
			HttpTransportSE ht = getHttpTransportSE();
			// request for customer login
			SoapObject Request = new SoapObject(NAMESPACE, apiFunctionName);
			SoapSerializationEnvelope requestEnvelop = getSoapSerializationEnvelope(Request);
			
			JSONObject jo = new JSONObject(jsonString);
			String jsonAsString = jo.toString();
			PropertyInfo stringArrayPropertyInfo = new PropertyInfo();
			stringArrayPropertyInfo.setName("attributes");
			stringArrayPropertyInfo.setValue(jsonString);
			stringArrayPropertyInfo.setType(jsonString.getClass());
			
			Request.addProperty(stringArrayPropertyInfo);
			
			ht.call(NAMESPACE, requestEnvelop);
				
			Object Response = (Object) requestEnvelop.getResponse();
			String ResponseAsString = Response.toString();
				
			return ResponseAsString;
		} catch (Exception e) {
			Log.d("Exception", e.toString());
			return "no";
		}
	}
	
	// main thing is there, we have used the reflaction here

	@Override
	protected void onPostExecute(Object backresult) {
		Method m;
		try {
			m = mContext.getClass().getDeclaredMethod(returnFunctionName, String.class);
			m.invoke(mContext, (String) backresult);
		} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		}
	}
	
	private final SoapSerializationEnvelope getSoapSerializationEnvelope(SoapObject request) {
		SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
				SoapEnvelope.VER11);
		envelope.dotNet = false;
		envelope.xsd = SoapSerializationEnvelope.XSD;
		envelope.enc = SoapSerializationEnvelope.ENC;
		envelope.setOutputSoapObject(request);
		return envelope;
	}
	
	private final HttpTransportSE getHttpTransportSE() {
		HttpTransportSE ht = new HttpTransportSE(AppCredentials.URL, 60000);
		ht.debug = true;
		ht.setXmlVersionTag("<!--?xml version=\"1.0\" encoding= \"UTF-8\" ?-->");
		return ht;
	}
}

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import java.io.IOException;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import org.json.JSONObject;

import org.ksoap2.SoapEnvelope;

import org.ksoap2.serialization.PropertyInfo;

import org.ksoap2.serialization.SoapObject;

import org.ksoap2.serialization.SoapSerializationEnvelope;

import org.ksoap2.transport.HttpTransportSE;

import webkul.opencart.mobikul.SplashScreen;

import webkul.opencart.mobikul.credentials.AppCredentials;

import android.app.ProgressDialog;

import android.content.Context;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

import android.os.AsyncTask;

import android.util.Log;

public class AsyncTaskConnection extends AsyncTask<String, String, Object>{

ProgressDialog progress;

Object response = null, mainResponse = null;

JSONObject mainObject;

Context mContext;

SharedPreferences configShared;

public Object customerLoginResponse;

public Editor editor;

String returnFunctionName;

private String pageNumber;

public AsyncTaskConnection (Context context){

mContext = context;

}

protected void onPreExecute() {

super.onPreExecute();

}

@Override

protected Object doInBackground(String... arguments) {

String apiFunctionName = arguments[0]; // get api FunctionName

String jsonString = arguments[1]; // get data which want to send to the server

returnFunctionName = apiFunctionName+"Response"; // response function name

try{

HttpTransportSE ht = getHttpTransportSE();

// request for customer login

SoapObject Request = new SoapObject(NAMESPACE, apiFunctionName);

SoapSerializationEnvelope requestEnvelop = getSoapSerializationEnvelope(Request);

JSONObject jo = new JSONObject(jsonString);

String jsonAsString = jo.toString();

PropertyInfo stringArrayPropertyInfo = new PropertyInfo();

stringArrayPropertyInfo.setName("attributes");

stringArrayPropertyInfo.setValue(jsonString);

stringArrayPropertyInfo.setType(jsonString.getClass());

Request.addProperty(stringArrayPropertyInfo);

ht.call(NAMESPACE, requestEnvelop);

Object Response = (Object) requestEnvelop.getResponse();

String ResponseAsString = Response.toString();

return ResponseAsString;

} catch (Exception e) {

Log.d("Exception", e.toString());

return "no";

}

// main thing is there, we have used the reflaction here

@Override

protected void onPostExecute(Object backresult) {

Method m;

try {

m = mContext.getClass().getDeclaredMethod(returnFunctionName, String.class);

m.invoke(mContext, (String) backresult);

} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {

e.printStackTrace();

} catch (NoSuchMethodException e) {

e.printStackTrace();

}

private final SoapSerializationEnvelope getSoapSerializationEnvelope(SoapObject request) {

SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(

SoapEnvelope.VER11);

envelope.dotNet = false;

envelope.xsd = SoapSerializationEnvelope.XSD;

envelope.enc = SoapSerializationEnvelope.ENC;

envelope.setOutputSoapObject(request);

return envelope;

}

private final HttpTransportSE getHttpTransportSE() {

HttpTransportSE ht = new HttpTransportSE(AppCredentials.URL, 60000);

ht.debug = true;

ht.setXmlVersionTag("");

return ht;

}

and in caller class(activity1,activity2,activity3)

activity1.java

replace

// connection call
HomeConnection Object = new HomeConnection();
Object.execute();

// connection call

HomeConnection Object = new HomeConnection();

Object.execute();

//call this class where you want and get dynamic response 
JSONObject jo = new JSONObject();
jo.put("some", "data");
new AsyncTaskConnection(this).execute("getHome",jo.toString());

//call this class where you want and get dynamic response

JSONObject jo = new JSONObject();

jo.put("some", "data");

new AsyncTaskConnection(this).execute("getHome",jo.toString());

and make response function to your class

// and make response function

public void getHomeResponse(String backresult) {
            try {
// this is your response
                mainObject = new JSONObject(backresult);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }

// and make response function

public void getHomeResponse(String backresult) {

try {

// this is your response

mainObject = new JSONObject(backresult);

} catch (JSONException e) {

e.printStackTrace();

}

Like this-
activity1.java

import org.json.JSONObject;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;

	public class activity1 extends Activity{

		protected void onCreate(Bundle bundle) {
			super.onCreate(bundle);
			setContentView(R.layout.activity_home);

                        // this methosd for call connection   
                        JSONObject jo = new JSONObject();
                        jo.put("some", "data");// create data to send to the server
                        new AsyncTaskConnection(this).execute("getHome",jo.toString());
		}

// and make response function

public void getHomeResponse(String backresult) {
            try {
                mainObject = new JSONObject(backresult);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
}

import org.json.JSONObject;

import android.app.Activity;

import android.os.AsyncTask;

import android.os.Bundle;

import android.util.Log;

public class activity1 extends Activity{

protected void onCreate(Bundle bundle) {

super.onCreate(bundle);

setContentView(R.layout.activity_home);

// this methosd for call connection

JSONObject jo = new JSONObject();

jo.put("some", "data");// create data to send to the server

new AsyncTaskConnection(this).execute("getHome",jo.toString());

}

// and make response function

public void getHomeResponse(String backresult) {

try {

mainObject = new JSONObject(backresult);

} catch (JSONException e) {

e.printStackTrace();

}

activity2.java

import org.json.JSONObject;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;

	public class activity2 extends BaseActivity{

		protected void onCreate(Bundle bundle) {
			super.onCreate(bundle);
			setContentView(R.layout.activity_category);

                        // this methosd for call connection   
                        JSONObject jo = new JSONObject();
                        jo.put("some", "data");// create data to send to the server
                        new AsyncTaskConnection(this).execute("getCategory",jo.toString());
		}

// and make response function

public void getCategoryResponse(String backresult) {
            try {
                mainObject = new JSONObject(backresult);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
}

import org.json.JSONObject;

import android.app.Activity;

import android.os.AsyncTask;

import android.os.Bundle;

import android.util.Log;

public class activity2 extends BaseActivity{

protected void onCreate(Bundle bundle) {

super.onCreate(bundle);

setContentView(R.layout.activity_category);

// this methosd for call connection

JSONObject jo = new JSONObject();

jo.put("some", "data");// create data to send to the server

new AsyncTaskConnection(this).execute("getCategory",jo.toString());

}

// and make response function

public void getCategoryResponse(String backresult) {

try {

mainObject = new JSONObject(backresult);

} catch (JSONException e) {

e.printStackTrace();

}

activity3.java

import org.json.JSONObject;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;

public class activity3 extends Activity{

	protected void onCreate(Bundle bundle) {
		super.onCreate(bundle);
		setContentView(R.layout.activity_product);

                // this methosd for call connection   
                JSONObject jo = new JSONObject();
                jo.put("some", "data");// create data to send to the server
                new AsyncTaskConnection(this).execute("showProduct",jo.toString());
	}

// and make response function

public void showProductResponse(String backresult) {
            try {
                mainObject = new JSONObject(backresult);
            } catch (JSONException e) {
                e.printStackTrace();
            }
       }
}

import org.json.JSONObject;

import android.app.Activity;

import android.os.AsyncTask;

import android.os.Bundle;

import android.util.Log;

public class activity3 extends Activity{

protected void onCreate(Bundle bundle) {

super.onCreate(bundle);

setContentView(R.layout.activity_product);

// this methosd for call connection

JSONObject jo = new JSONObject();

jo.put("some", "data");// create data to send to the server

new AsyncTaskConnection(this).execute("showProduct",jo.toString());

}

// and make response function

public void showProductResponse(String backresult) {

try {

mainObject = new JSONObject(backresult);

} catch (JSONException e) {

e.printStackTrace();

}

By using reflection method, we can avoid writing different classes for each single call.
Simply we have to pass context of the activity, API function name and data to send in JSON form.
And get the response where your want.

Aman Gupta

22 Dec, 2016
Updated by - Aman Gupta
29 Dec, 2015
Created by - Aman Gupta

. . .

How to avoid making a lot of asynkTask class for calling single hit in android

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