Dynamically Create View Elements - Android Example

In this example creating some UI elements on screen on run time. Creating textview , buttons dynamically and creating onclick listener for buttons. After click on button show index(id).

File : src/GlobalClass.java

package com.androidexample.dynamicallycreateelements;

import android.os.Bundle;
import android.app.Activity;
import android.app.ActionBar.LayoutParams;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.dynamically_create_view_element);
		
		final LinearLayout lm = (LinearLayout) findViewById(R.id.linearMain);
		
		// create the layout params that will be used to define how your
	    // button will be displayed
		LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
	            LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		
		//Create four 
		for(int j=0;j<=4;j++) 
		{	
			// Create LinearLayout
			LinearLayout ll = new LinearLayout(this);
			ll.setOrientation(LinearLayout.HORIZONTAL);
			
			// Create TextView
			TextView product = new TextView(this);
			product.setText(" Product"+j+"    ");
			ll.addView(product);
			
			// Create TextView
			TextView price = new TextView(this);
			price.setText("  $"+j+"     ");
			ll.addView(price);
			
			// Create Button
			final Button btn = new Button(this);
			    // Give button an ID
				btn.setId(j+1);
				btn.setText("Add To Cart");
				// set the layoutParams on the button
				btn.setLayoutParams(params);
				
			    final int index = j;
			    // Set click listener for button
			    btn.setOnClickListener(new OnClickListener() {
			        public void onClick(View v) {
			        	
			            Log.i("TAG", "index :" + index);
                        
                        Toast.makeText(getApplicationContext(), 
			            		"Clicked Button Index :" + index, 
		            			Toast.LENGTH_LONG).show();
			            
			        }
			    });
			    
			   //Add button to LinearLayout
			    ll.addView(btn);
			   //Add button to LinearLayout defined in XML
			    lm.addView(ll);  
	    }
	}
}