how to remove old values in my table

[shawn peter]

I am creating table programatically.when the button clicks table creating programatically.my rpoblem is when i click button 2nd time it print new values below the old values.I need to print only new values.i don't know why it print old values.how to avoid this issue?

package com.android.createtablw;

import java.util.ArrayList;




import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.TableRow.LayoutParams;

public class MainActivity extends Activity {

	protected ArrayList<String> Production;
	protected TableLayout tl ;
	private int count=0;
	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.pm_shift);
		
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	void setArraySizes(){
		Production = new ArrayList<String>();
	}
	
	void addvalues() {

		Production.add("Kasun");
		Production.add("Doshan");
		Production.add("NAzeeha");
		
	}
	
void printtable(){
		
		//setArray();
		
		setArraySizes();
		addvalues();
		
		Toast.makeText(this, "count   "+count, Toast.LENGTH_LONG).show();
		
		
		
		for (int i = 0; i < 3; i++) {

			 TableRow productionmorning = new TableRow(this);
			 productionmorning.setId(i+1);
			 productionmorning.setLayoutParams(new LayoutParams(
	                    LayoutParams.FILL_PARENT,
	                    LayoutParams.WRAP_CONTENT));
			 
			 if(i<1){
			tl = (TableLayout) findViewById(R.id.maintable);
			 }
			// Create a TextView for each day in week
			 
			 if(Production.size()>i){
							
				count++;
				
				
				 TextView prodttext = new TextView(this);
		            prodttext.setId(i+1);
		            prodttext.setGravity(Gravity.CENTER);
		            prodttext.setText(Production.get(i)+count);
		            prodttext.setTextColor(Color.BLACK);
		            prodttext.setBackgroundDrawable(getResources().getDrawable(R.drawable.borderblue));
		            prodttext.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
		            productionmorning.addView(prodttext);
				 
		            TableRow.LayoutParams params = new TableRow.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		            params.height = 60;
		            params.width = 100;
		            params.setMargins(0, 0, 0, 0);
		            prodttext.setLayoutParams(params);
}
			 
			 tl.addView(productionmorning, new TableLayout.LayoutParams(
	                    LayoutParams.FILL_PARENT,
	                    LayoutParams.WRAP_CONTENT));
			 
		}
}
	

public void onButtonClicker(View v) {
	Intent intent;

	switch (v.getId()) {
	case R.id.btnViewShift:
		printtable();
		break;

	

	default:
		break;
	}
}

}