why my code doesnt create buttons dynamically in android

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Java

Mobile

Android

Android4x

hi . im developing an android application . this application should give data from web and show it .
the problem is , it gives data very well . but it cant show it !
surprisingly i debugged my application but i couldn't find any problem or Exception ! if you let me i show you my code Complitly and after that i explain it part by part .

Code :

public class MainActivity extends Activity {	
	
	String WebData="";// Data from Web Server	
	int DC=0;// Data Counter 	
	String []SplitData=new String[10] ;	//Split Data array
	
	
	protected void DataCollector(String ReciveData)
	{		
	WebData=ReciveData;	
	}
    private void Spliter()
    {  	
    SplitData=WebData.split("-");   
    }
	private void CreateUI()
	{
		String BtnText="";
		Button B=null;		
		LinearLayout ll=(LinearLayout)findViewById(R.id.ll);
		try
		{
		for(String aSplitData : SplitData)
			{			
			BtnText=aSplitData.split("/")[0];
			B=new Button(this);			     B.setTextSize(TypedValue.COMPLEX_UNIT_DIP,10);			
			B.setText(BtnText);
			ll.addView(B);			
			}
		}
		catch(Exception ex)
		{
			Log.d("Error : ",ex.toString());
		}
	}	
	
	class RetrieveFeedTask extends AsyncTask {
	   
		protected String doInBackground(String...Urls) {
	    	try
	    	{
	    			    		
	    		HttpURLConnection urlConnection = null;	    		  		
	    	    URL myUrl=new URL("http://10.0.2.2:80/mob1/Default.aspx");	    
	    		urlConnection = (HttpURLConnection)myUrl.openConnection();		
	    		BufferedReader in = new BufferedReader (new InputStreamReader(urlConnection.getInputStream()));    		
	    		String temp="";	     
	    		while((temp=in.readLine())!=null)
	    		{    			
	    			DataCollector(temp);    		
	    		}	    		
	    	    if(urlConnection!=null){
	    	    urlConnection.disconnect(); 	
	    	    } 	    		    			
	    	}	    	
	    		catch(Exception e)
	    		{
	    		Log.d("error",e.toString());
	    		return "1";
	    	
	    		}
	    	return "1";	
	    }		
		protected void onPostExecute(String Result)
	    {
	    	//	      
	    }
	

	}	
	protected void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
    	        setContentView(R.layout.activity_main);	
		new RetrieveFeedTask().execute();	
		Spliter();
		CreateUI();
		
		
    	
	}

}

as i said it Gives Data, but when it wants to Create buttons ( CreateUI() ) it makes only one button without any text! if you debug my Cod you cant find any Exception it seems everything Works well !

private void CreateUI()
	{
		String BtnText="";
		Button B=null;		
		LinearLayout ll=(LinearLayout)findViewById(R.id.ll);
		try
		{
		for(String aSplitData : SplitData)
			{			
			BtnText=aSplitData.split("/")[0];
			B=new Button(this);			  B.setTextSize(TypedValue.COMPLEX_UNIT_DIP,10);			
			B.setText(BtnText);
			ll.addView(B);			
			}
		}
		catch(Exception ex)
		{
			Log.d("Error : ",ex.toString());
		}
	}

also i changed my code and Set Buttons Text Directly . it worked ! it made 10 buttons !

LinearLayout ll=(LinearLayout)findViewById(R.id.ll);
for(int i=0;i<=9;i++)
 {
B=new Button(this);			B.setTextSize(TypedValue.COMPLEX_UNIT_DIP,10);			
			B.setText("1");
			ll.addView(B);
 }

what do you think or suggest ?