Preferences.java

package com.nf2m.preferences;


import android.content.Context;
import android.content.SharedPreferences;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import com.nf2m.fragment.NowPlayingFragment;
import com.nf2m.serializer.ObjectSerializer;

import java.io.IOException;
import java.util.ArrayList;

public class Preferences {
    private static final String SONG_XML_FILE = "com.nf2m.song_xml_file";
    private static final String KEY_REPEAT = "repeat";
    private static final String KEY_SONG_DURATION = "song_duration";
    private static final String KEY_SONG_POSITION = "song_position";
    private static final String KEY_VOLUME = "volume";
    private static final String KEY_SHUFFLE = "key_shuffle";
    private static final String KEY_FAVORITES = "favorites";
    private static final String KEY_PREF_TIMER = "timer";
    private static final String KEY_QUERY_WHERE = "query_where";
    private static final String KEY_QUERY_SELECTION_ARGS = "query_selection_args";
    private static final String KEY_QUERY_URI = "query_uri";
    private static SharedPreferences sharedPreferences;

    @NonNull
    public static Preferences newInstance(@NonNull Context context) {
        sharedPreferences = context.getSharedPreferences(SONG_XML_FILE, Context.MODE_PRIVATE);
        return new Preferences();
    }

    //set pref
    public void setPrefSongPos(int pos) {
        sharedPreferences.edit().putInt(Preferences.KEY_SONG_POSITION, pos).apply();
    }


    public void setPrefFavorites(ArrayList<String> favorites) {
        try {
            sharedPreferences.edit().putString(KEY_FAVORITES,
                    ObjectSerializer.serialize(favorites)).apply();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void setPrefDuration(int duration) {
        sharedPreferences.edit().putInt(KEY_SONG_DURATION, duration).apply();
    }

    public void setPrefVolume(int volume) {
        sharedPreferences.edit().putInt(KEY_VOLUME, volume).apply();
    }

    public void setPrefShuffle(String shuffle) {
        sharedPreferences.edit().putString(KEY_SHUFFLE, shuffle).apply();
    }

    public void setPrefRepeat(String repeat) {
        sharedPreferences.edit().putString(KEY_REPEAT, repeat).apply();
    }

    public void setPrefTimer(int time) {
        sharedPreferences.edit().putInt(KEY_PREF_TIMER, time).apply();
    }

    public void setPrefQueryWhere(String where) {
        sharedPreferences.edit().putString(KEY_QUERY_WHERE, where).apply();
    }

    public void setPrefQuerySelectionArgs(ArrayList<String> selectionArgs) {
        try {
            sharedPreferences.edit().putString(KEY_QUERY_SELECTION_ARGS,
                    ObjectSerializer.serialize(selectionArgs)).apply();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void setPrefQueryUri(String uri) {
        sharedPreferences.edit().putString(KEY_QUERY_URI, uri).apply();
    }

    //getPref

    @Nullable
    public ArrayList<String> getPrefFavorites() {
        ArrayList<String> favorites;
        try {
            favorites = (ArrayList<String>) ObjectSerializer.deserialize(
                    sharedPreferences.getString(KEY_FAVORITES, ObjectSerializer.serialize(new ArrayList<String>())));
        } catch (IOException e) {
            e.printStackTrace();
            favorites = new ArrayList<>();
        }
        return favorites;
    }

    public int getPrefSongPosition() {
        return sharedPreferences.getInt(KEY_SONG_POSITION, -1);
    }

    public int getPrefSongDuration() {
        return sharedPreferences.getInt(KEY_SONG_DURATION, 0);
    }

    public int getPrefVolume() {
        return sharedPreferences.getInt(KEY_VOLUME, 10);
    }

    @Nullable
    public String getPrefShuffle() {
        return sharedPreferences.getString(KEY_SHUFFLE, NowPlayingFragment.SHUFFLE_OFF);
    }

    @Nullable
    public String getPrefRepeat() {
        return sharedPreferences.getString(KEY_REPEAT, NowPlayingFragment.REPEAT_OFF);
    }

    public int getPrefTimer() {
        return sharedPreferences.getInt(KEY_PREF_TIMER, 0);
    }


    @Nullable
    public String getPrefQueryWhere() {
        return sharedPreferences.getString(KEY_QUERY_WHERE, null);
    }

    @Nullable
    public ArrayList<String> getPrefQuerySelectionArgs() {
        ArrayList<String> selectionArgs = null;
        try {
            selectionArgs = (ArrayList<String>) ObjectSerializer.deserialize(
                    sharedPreferences.getString(KEY_QUERY_SELECTION_ARGS, null));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return selectionArgs;
    }

    @Nullable
    public String getPrefQueryUri() {
        return sharedPreferences.getString(KEY_QUERY_URI, null);
    }
}