如何为SharedPreference创建一个共享库？

implementation 'androidx.preference:preference-ktx:1.1.1'

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <PreferenceCategory android:title="General">
        <EditTextPreference
            android:key="username"
            android:title="Username"
            android:summary="Enter your username"
            android:defaultValue="John Doe" />
        <ListPreference
            android:key="gender"
            android:title="Gender"
            android:summary="Select your gender"
            android:entries="@array/gender_entries"
            android:entryValues="@array/gender_values"
            android:defaultValue="male" />
    </PreferenceCategory>
</PreferenceScreen>

import android.content.Context
import androidx.preference.PreferenceManager

class PreferenceHelper(private val context: Context) {

    private val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)

    fun setUsername(username: String) {
        sharedPreferences.edit().putString("username", username).apply()
    }

    fun getUsername(): String {
        return sharedPreferences.getString("username", "") ?: ""
    }

    fun setGender(gender: String) {
        sharedPreferences.edit().putString("gender", gender).apply()
    }

    fun getGender(): String {
        return sharedPreferences.getString("gender", "") ?: ""
    }
}

val preferenceHelper = PreferenceHelper(context)
preferenceHelper.setUsername("John Doe")
val username = preferenceHelper.getUsername()