Having trouble with Asynctask in android

Having trouble with Asynctask in android

I'm developing some sort of game for android, in order of fulfilling this
purpose I'm using a SurfaceView which is hold inside an Activity.
There are sometimes when a pause is required so the Surfaceview actually
draws something in the canvas, then it waits and draws some other thing
secuencially according to some integers that are stored inside a Vector.
At first I tried to get this pause by using Thread.sleep(), and
Systemclock.sleep(), and it seems to be quite useless because the thread
got always blocked so even if the drawing method is called properly no
changes were displayed.
Here I saw that using an Asynctask doing the sleeping job and then raising
a flag should be a good idea to get things done.
So I did that but it seems that onPostExecute is never called, so my flag
is never risen...
Any ideas of how to proceed?
This is my first android app so please be kind and as pacient as you can
with your answers.
Thanks a lot.
Here is the pause method:
public void pausar(){
Log.e("pausar", "entro a pausar");
AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
Log.e("pausar", "Empiezo a dormir");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.e("pausar", "Acaba el sleep");
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
despierta = true;
Log.e("pausar", "¡¡¡¡¡¡¡¡¡¡¡¡¡¡DESPIERTO!!!!!!!!!!!");
}
};
if(!llamaPausa){
task.execute();
llamaPausa = true;
}
}
And this one is the sequence player method where the pause is required:
public void reproducirSecuencia(final Canvas canvas){
reproduciendo = true;
//TODO: HACER QUE ESTO FUNCIONE!!
Log.e("reproducirSecuencia", "Entro a reproducir");
int i = 0;
while(i < secuencia.size()){
Object o = secuencia.elementAt(i);
int num = 0;
if (o instanceof Integer) {num = (Integer) o;}
reproducirSonido(num);
repId = num;
onDraw(canvas);
//Log.e("reproducirSecuencia", "repId = " + repId);
//Log.e("reproducirSecuencia", "Invoco a pintarPiezas");
i++;
if(!despierta){
pausar();
Log.e("Repsec", "despierta = " + despierta);
}
llamaPausa = true;
despierta = false;**
//SystemClock.sleep(1000);
//try {Thread.sleep(1000);}
//catch (InterruptedException e) {e.printStackTrace();}
}
reproduciendo = false;
}
Here is the logcat:
08-18 22:21:54.050 805-904/com.example.simondeluxe E/onDraw: Entro a
onDraw desde repsec
08-18 22:21:54.060 805-904/com.example.simondeluxe E/pausar: entro a
pausar 08-18 22:21:54.060 805-904/com.example.simondeluxe E/Repsec:
despierta = false 08-18 22:21:54.070 805-904/com.example.simondeluxe
E/onDraw: Entro a onDraw desde repsec 08-18 22:21:54.070
805-904/com.example.simondeluxe E/pausar: entro a pausar 08-18
22:21:54.070 805-904/com.example.simondeluxe E/Repsec: despierta = false
08-18 22:21:54.080 805-904/com.example.simondeluxe E/onDraw: Entro a
onDraw desde repsec 08-18 22:21:54.080 805-904/com.example.simondeluxe
E/pausar: entro a pausar 08-18 22:21:54.080
805-904/com.example.simondeluxe E/Repsec: despierta = false 08-18
22:21:54.090 805-904/com.example.simondeluxe E/onDraw: Entro a onDraw
desde repsec 08-18 22:21:54.090 805-904/com.example.simondeluxe E/pausar:
entro a pausar 08-18 22:21:54.090 805-904/com.example.simondeluxe
E/Repsec: despierta = false