Question

EDIT:
OK It turns out this code was working (more or less) I’d left in a line that reset the booleans I was trying to change. Thanks everyone for the help though.

Having trouble using SharedPreferences to read in saved array data when my app starts.
My _dPad Boolean and my _FreePlay Integer loads, saves and passes to and from my _renderer without any problems.

The trouble starts when I try and use some arrays
easteregg[] only has 2 entries right now so obviously I could just just turn them into separate variables but I wish to add more arras of longer length so this makes a convenient test example.

I’ve noted on the code what appears to happen (the easteregg[] settings just doesn’t appear to have changed)

to read data:

    // Read saved preferences    
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);

    _renderer._dPad = prefs.getBoolean("_dPad", false);                // * works ok *
    _renderer._FreePlay = prefs.getInt("_FreePlay", 1);                // * works ok *
    _renderer.easteregg[0] = prefs.getBoolean("easteregg[0]", false ); // * not working
    _renderer.easteregg[1] = true;                        // * even this is not working

    setRenderer(_renderer);

to write data:

    public void onDetachedFromWindow() {
    super.onDetachedFromWindow();

    // As good a time as any to save current config
    save = false ; // don't commit if nothing changed.

    SharedPreferences prefs =                       
    PreferenceManager.getDefaultSharedPreferences(getContext());
    SharedPreferences.Editor editor = prefs.edit();

    if (_renderer._dPad != prefs.getBoolean("_dPad",false)){ save = true ;
    editor.putBoolean("_dPad", _renderer._dPad);}

    if (_renderer._FreePlay != prefs.getInt("_FreePlay",1)){ save = true ;
    editor.putInt("_FreePlay", _renderer._FreePlay);}

    editor.putBoolean("easteregg[0]", _renderer.easteregg[0]);

    editor.putBoolean("easteregg[1]", _renderer.easteregg[1]);

    if (save == true){editor.commit();}

}

And in the .renderer class

    // START SAVE DATA
    public boolean _dPad ; // false no Virtual Pad     *Works Fine*
    public int _FreePlay ;  // 1 = no free play        *Works Fine*
    public boolean[] easteregg = new boolean[2];       *Values don't load or save*
    //public boolean easteregg[]; // tried this first  *CAUSES CRASH*
    // END SAVE DATA

Do I have to convert the arrays to strings? I don’t get how to change them.

Answer 1

I put your code into a quick activity, creating just the shell of the renderer class as you have above and found that your save boolean is false, so it never commits the preferences.

I forced the save to true, and played around with it and everything worked fine from there.

I’d recommend adding checks to the easter eggs the same as you have for any other preference; test to see if the current value is the same as the saved value, and if not, set the save flag.