How do I delete all saved preferences in my libgdx project?

Question

I want to delete the preferences that saved my last highscore. How can I do this?

Here's how I am saving preferences at the moment:

prefs = Gdx.app.getPreferences("ZombieBird");
if (!prefs.contains("highScore")){
    prefs.putInteger("highScore", 0);
}

public static void setHighScore(int val) {
   prefs.putInteger("highScore", val);
   prefs.flush();
}

Answer 1

To delete preferences data—

Manually

On desktop, shared preferences data is in User/.prefs. Simply delete the files in it.

On Android, do App Info → Clear data.

Programmatically (Android and Desktop)

If you change the Key (string) of your sharedpreferece you will lose your data. To do this, use

prefs.putInteger("keyString", newValue)

Answer 2

To do it programmatically without having to keep track of all the keys:

Preferences prefs = Gdx.app.getPreferences( "your_preferences_name_here" );

// Clears the values
prefs.clear();

// Saves the change
prefs.flush();

Answer 3

Just for the Mac to delete preferences/data you need to go to:

~/.prefs

and delete you game file.

https://github.com/libgdx/libgdx/wiki/Preferences#storage