WorkHelper : Processing class
package com.customlistener;
import android.location.Location;
import android.util.Log;
/**
* @author piyush
* Does data processing.
*/
public class WorkHelper {
private HelperResult helperResult;
private String tag="WorkHelper",resultString;
private int randomNumber=-1,limit=1000;
public WorkHelper(HelperResult helperResult) {
this.helperResult=helperResult;
}
public void doProcessing()
{
//generate number between 0 to 1000
randomNumber=(int)(Math.random()*limit);
Log.d(tag,"doProcessing:"+randomNumber);
resultString="New RandomNumber is : "+randomNumber;
//post data back to MainActivity
helperResult.getResult(resultString);
}
public static abstract class HelperResult{
public abstract void getResult(String resultString);
}
}
MainActivity : UI Class
package com.customlistener;
import com.customlistener.WorkHelper.HelperResult;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
/**
* Main Activity
* @author piyush
*/
public class MainActivity extends Activity {
private String tag="HelperResult",resultStr="";
private Button startButton;
private WorkHelper workHelper;
private Context context;
private TextView textViewData;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
context=this;
workHelper=new WorkHelper(helperResult);
startButton=(Button)findViewById(R.id.button1);
textViewData=(TextView)findViewById(R.id.textDetail);
startButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v)
{
//generate random number
workHelper.doProcessing();
}
});
}
/**
* Create Instance of HelperResult Class
* and Implement getResult().
*/
HelperResult helperResult=new HelperResult()
{
@Override
public void getResult(String resultString) {
Log.d(tag,"in MainActivity");
Log.d(tag,"Result Received :"+resultString);
resultStr+=resultString+"\n";
textViewData.setText(resultStr);
}
};
}
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