Yeah did that and its working...thanks a lot

This is what I have tried till now :

  package com.droidacid.apticalc;

    import android.app.Activity;
    import android.os.Bundle;
    import android.text.InputType;
    import android.view.View;
    import android.view.View.onclickListener;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.RadioGroup;
    import android.widget.RadioGroup.OnCheckedChangeListener;
    import android.widget.TextView;

    public class timeNWork extends Activity implements onclickListener,         OnCheckedChangeListener{

	TextView TVnotice, TVoutput;
	RadioGroup RGselect;
	EditText num1, num2, num3;
	Button calculate;
	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.aptitimenwork);
		initialize();
	}	
	
		private void initialize() 
		{
		
		TVoutput = (TextView) findViewById(R.id.TVresult);
		//RGselect = (RadioGroup) findViewById(R.id.rgSelect);
		
		num1 = (EditText) findViewById(R.id.ETfirst);
		num2 = (EditText) findViewById(R.id.ETsecond);
		num3 = (EditText) findViewById(R.id.ETthird);
		RGselect.setOnCheckedChangeListener(this);
		
		}

	@Override
	public void onclick(View v) {
		// TODO Auto-generated method stub
		
		Double numb1 = Double.parseDouble(num1.getText().toString());
		Double numb2 = Double.parseDouble(num2.getText().toString());
		Double numb3 = Double.parseDouble(num3.getText().toString());
		
		double result = 0;
		
		if(RGselect.getId()==R.id.rbtwoperson)
	      {
			num3.setVisibility(2);
			double number1 = numb1;
			double number2 = numb2;
			result = 100 / (number1 + number2);
			TVoutput.setText(Double.toString(result));
	      }
		else
		{
			double number1 = numb1;
			double number2 = numb2;
			double number3 = numb3;
			result = 100 / (number1 + number2 + number3);
			TVoutput.setText(Double.toString(result));
		}
	}

	@Override
	public void onCheckedChanged(RadioGroup arg0, int arg1) {
		// TODO Auto-generated method stub
		
		switch(arg1)
		{
		case R.id.rbtwo:
			num3.setEnabled(false);
            num3.setInputType(InputType.TYPE_NULL);
            num3.setFocusableInTouchMode(false);
            num3.clearFocus();
			break;
		case R.id.rbthree:
			
			break;
		}
		
	}

    }

Nopes actually the action android:name was having wrong values... Rest facing many small problems everyday. And talking around 4-5 hrs to get resolved. So if someone can help me with these small problems would be appreciated...


Can you guide me about improving my UI?

Made it work by using switch case.

Better I should learn that. But for now can you help me with this issue so that I can complete this module.