Preferences.java

package me.wcy.music.utils;

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.support.annotation.Nullable;

import me.wcy.music.R;

/**
 * SharedPreferences工具类
 * Created by wcy on 2015/11/28.
 */
public class Preferences {
    private static final String MUSIC_ID = "music_id";
    private static final String PLAY_MODE = "play_mode";
    private static final String SPLASH_URL = "splash_url";
    private static final String NIGHT_MODE = "night_mode";

    private static Context sContext;

    public static void init(Context context) {
        sContext = context.getApplicationContext();
    }

    public static long getCurrentSongId() {
        return getLong(MUSIC_ID, -1);
    }

    public static void saveCurrentSongId(long id) {
        saveLong(MUSIC_ID, id);
    }

    public static int getPlayMode() {
        return getInt(PLAY_MODE, 0);
    }

    public static void savePlayMode(int mode) {
        saveInt(PLAY_MODE, mode);
    }

    public static String getSplashUrl() {
        return getString(SPLASH_URL, "");
    }

    public static void saveSplashUrl(String url) {
        saveString(SPLASH_URL, url);
    }

    public static boolean enableMobileNetworkPlay() {
        return getBoolean(sContext.getString(R.string.setting_key_mobile_network_play), false);
    }

    public static void saveMobileNetworkPlay(boolean enable) {
        saveBoolean(sContext.getString(R.string.setting_key_mobile_network_play), enable);
    }

    public static boolean enableMobileNetworkDownload() {
        return getBoolean(sContext.getString(R.string.setting_key_mobile_network_download), false);
    }

    public static void saveMobileNetworkDownload(boolean enable) {
        saveBoolean(sContext.getString(R.string.setting_key_mobile_network_download), enable);
    }

    public static boolean isNightMode() {
        return getBoolean(NIGHT_MODE, false);
    }

    public static void saveNightMode(boolean on) {
        saveBoolean(NIGHT_MODE, on);
    }

    private static boolean getBoolean(String key, boolean defValue) {
        return getPreferences().getBoolean(key, defValue);
    }

    private static void saveBoolean(String key, boolean value) {
        getPreferences().edit().putBoolean(key, value).apply();
    }

    private static int getInt(String key, int defValue) {
        return getPreferences().getInt(key, defValue);
    }

    private static void saveInt(String key, int value) {
        getPreferences().edit().putInt(key, value).apply();
    }

    private static long getLong(String key, long defValue) {
        return getPreferences().getLong(key, defValue);
    }

    private static void saveLong(String key, long value) {
        getPreferences().edit().putLong(key, value).apply();
    }

    private static String getString(String key, @Nullable String defValue) {
        return getPreferences().getString(key, defValue);
    }

    private static void saveString(String key, @Nullable String value) {
        getPreferences().edit().putString(key, value).apply();
    }

    private static SharedPreferences getPreferences() {
        return PreferenceManager.getDefaultSharedPreferences(sContext);
    }
}