Add preference fragment and monitor for clicks

Add a preference fragment where we inflate our settings screen, then do something if the user clicks on an item inside that screen.

1 
2 
3 
4
5 
6
7
8 
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

class MySettingsFragment : PreferenceFragmentCompat() {
    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {

        setPreferencesFromResource(R.xml.settings, rootKey)

        val sharedPref = activity?.getPreferences(AppCompatActivity.MODE_PRIVATE) ?: return
        val vNormalMap: Preference? = findPreference(getString(R.string.pNormal_map))

        vNormalMap?.onPreferenceClickListener = Preference.OnPreferenceClickListener {

            it.setIcon(R.drawable.icon_radio_grey)

            with (sharedPref.edit()) {
                putString(getString(R.string.pNormal_map), "newHighScore")
                apply()
            }

            val defaultValue = "resources"
            val highScore = sharedPref.getString(getString(R.string.pNormal_map), defaultValue)
            println("The current value is $highScore")

            true
        }
        
    }
}

Where:

• 4️⃣ - Create the preference screen from an XML resource
• 6️⃣ - Declare a preference file where we can save the user's choices
• 7️⃣ - Specify an item in our XML resource as a preference object
• 9️⃣ - Listen for clicks on this item
  

If user clicks, do the following:

• 1️⃣1️⃣ - Change the icon of the resource
• 1️⃣3️⃣ ▸ 1️⃣6️⃣ - Set the value of the "pNormalMap" key as "newHighScore"
• 1️⃣8️⃣ - Set the default value as "resources"
• 1️⃣9️⃣ - Get the current value of "pNormalMap". If no value set, use the default value
• 2️⃣0️⃣ - Print the current value to logcat