Intent.FLAG_ACTIVITY_CLEAR_TASK|Intent.FLAG_ACTIVITY_NEW_TASK not working Android

Question

well, so, that´s my problem.

I need, when the user press the back bottom, to delete the stack of all activities opened:

@Override
public void onBackPressed(){
    Intent i = new Intent(context, CrisolMainApp.class);
    i.putExtra(CrisolMainApp.CERRAR_APP, true);
    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK|Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(i);
}

The point is that this is working with most of my phones, but yesterday I tried with a Samsung Galaxy Mini (android 2.3.3) and it is not working!! It is not deleting the stack of activities.

Anyone knows why?

EDIT: I was checking on doc, and I found out that the "Intent.FLAG_ACTIVITY_CLEAR_TASK" was added on API 11(my Samsung Galaxy Mini is working for Android 2.3.3, so, API 10).......I don´t know, but I guess that´s the problem.

Anyone knows how can I make it work the same way for API less than 11?

I was trying by adding these flags and it is not working either:

@Override
public void onBackPressed(){
    Intent a = new Intent(this, CrisolMainApp.class);
    a.putExtra(CrisolMainApp.CERRAR_APP, true);
    a.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK|Intent.FLAG_ACTIVITY_NEW_TASK);
    a.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    a.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
    startActivity(a);
    finish();
}

and I also tried:

@Override
    public void onBackPressed(){
        Intent a = new Intent(this, CrisolMainApp.class);
        a.putExtra(CrisolMainApp.CERRAR_APP, true);
        a.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        a.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        startActivity(a);
        finish();
    }

Answer 1

A simple fix should be adding the xml attribute android:noHistory="true" to all of your activities, which will mean that as soon as the user leaves that Activity, it will be gone, and no back stack will be stored

Answer 2

You do not finish the activity.

Intent i = new Intent(context, CrisolMainApp.class);
i.putExtra(CrisolMainApp.CERRAR_APP, true);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK|Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
finish();