Application preference wrapper class :

AppPreferences.java

import android.content.Context;
import android.content.SharedPreferences;

public class AppPreferences {

    private static String PREFERENCE_FILE_NAME = "application_preferences";

    public static String IMEI = "imei";

    private static SharedPreferences getSharedPreferences(Context context) {

        SharedPreferences sharedPreferences = context.getSharedPreferences(PREFERENCE_FILE_NAME, 0);

        return sharedPreferences;
    }

    private static SharedPreferences.Editor getSharedPreferencesEditor(Context context) {

        return getSharedPreferences(context).edit();
    }

    public static boolean getBoolean(String key, boolean defaultValue, Context context) {

        return getSharedPreferences(context).getBoolean(key, defaultValue);
    }

    public static void setBoolean(String key, boolean value, Context context) {

        getSharedPreferencesEditor(context).putBoolean(key, value).commit();
    }

    public static int getInt(String key, int defaultValue, Context context) {

        return getSharedPreferences(context).getInt(key, defaultValue);
    }

    public static void setInt(String key, int value, Context context) {

        getSharedPreferencesEditor(context).putInt(key, value).commit();
    }

    public static String getString(String key, String defaultValue, Context context) {

        return getSharedPreferences(context).getString(key, defaultValue);
    }

    public static void setString(String key, String value, Context context) {

        getSharedPreferencesEditor(context).putString(key, value).commit();
    }


    public static float getFloat(String key, float defaultValue, Context context) {

        return getSharedPreferences(context).getFloat(key, defaultValue);
    }

    public static void setFloat(String key, float value, Context context) {

        getSharedPreferencesEditor(context).putFloat(key, value).commit();
    }

    public static long getLong(String key, long defaultValue, Context context) {

        return getSharedPreferences(context).getLong(key, defaultValue);
    }

    public static void setLong(String key, long value, Context context) {

        getSharedPreferencesEditor(context).putLong(key, value).commit();
    }

}