This class contain a thread that run a log every 3 seconds

ThreadSleepyhead.java

// [ES] Hilo dormilón

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class ThreadSleepyhead extends AppCompatActivity {

    TextView texto;
    Button boton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        texto = (TextView) findViewById(R.id.texto);
        boton = (Button) findViewById(R.id.boton);

        boton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        for(int i =1; i<= 10; i++){
                            try {
                                Thread.sleep(3000);
                            } catch (InterruptedException e) {
                                e.printStackTrace();
                            }
                            Log.d("DEBUG", String.valueOf(i)); //This runs every 3 seconds
                        }
                    }
                }).start();
            }
        });
    }

}