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Last active April 17, 2019 18:09
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Preferences.md

So, let's imagine that we're making Preferences as Settings.

First, we make SettingsActivity, of course, which is the plain activity we all know of. Its XML must actually be a fragment, referring to SettingsFragment(which we'll make; extends PreferenceFragmentCompat) with android:name.

Second, we make SettingsFragment with its XML preference xml(<PreferenceScreen and nested preferences in it) in res/xml directory. And we bond the resource to a Fragment with addPreferencesFromResource method.

Then, we must not forget to add preference theme(@style/PreferenceThemeOverlay) to styles.xml, otherwise our app will crash.

Dope fact: any change to the UI in the activity of Settings(of preferences) is automatically saved into SharedPreferences.

Validating EditTextPreference inputs

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