Simple class for easily Using Preferences in Android

BashPreferencesManager.java

import android.content.Context;
import android.content.ContextWrapper;
import android.content.SharedPreferences;
import android.support.compat.BuildConfig;

/**
 * 
 * Created by bashizip@gmail.com
 */
public class BashPreferencesManager extends ContextWrapper {


    public static final String PREF_NAME = BuildConfig.APPLICATION_ID;

    private static BashPreferencesManager instance;
    private SharedPreferences pm;
    private SharedPreferences.Editor editor;

    private BashPreferencesManager(Context base) {
        super(base);
        pm = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
    }

    public static BashPreferencesManager getInstace(Context ctx) {
        if (instance == null) {
            instance = new BashPreferencesManager(ctx);
        }
        return instance;
    }

    private SharedPreferences.Editor getEditor() {
        if (editor == null) {
            editor = pm.edit();
        }
        return editor;
    }

    public BashPreferencesManager put(String key, String value) {
        getEditor().putString(key, value);
        return this;
    }

    public void commit() {
        getEditor().apply();
    }

    public String getValue(String key) {
        return pm.getString(key, null);
    }
}