Andriod: Hello world !

##HelloWorld2Activity.java

package a.b.com;


import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;


public class HelloWorld2Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        TextView tv = new TextView(this);
        tv.setText("Hello World!!!");
        setContentView(tv);
        
        tv.append("\n\rHello Gabriel!!");
        setContentView(tv);
    }
}