读 Beginning Android Games 2nd Edition (十四) 玩家设置存储类

下面是接上篇中用到的一个类,该类用来存储用户设置,例如静音或非静音,另外存储玩家的一个分数榜前5名

package com.badlogic.androidgames.mrnom;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import com.badlogic.androidgames.framework.FileIO;

public class Settings {
    public static boolean soundEnabled = true;
    public static int[] highscores = new int[] { 100, 80, 50, 30, 10 };
    
    public static void load(FileIO files) {
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(
                    files.readFile(".mrnom")));
            soundEnabled = Boolean.parseBoolean(in.readLine());
            for (int i = 0; i < 5; i++) {
                highscores[i] = Integer.parseInt(in.readLine());
            }
        } catch (IOException e) {
            // :( It's ok we have defaults
        } catch (NumberFormatException e) {
            // :/ It's ok, defaults save our day
        } finally {
            try {
                if (in != null)
                    in.close();
            } catch (IOException e) {
            }
        }
    }
    
    public static void save(FileIO files) {
        BufferedWriter out = null;
        try {
            out = new BufferedWriter(new OutputStreamWriter(
                    files.writeFile(".mrnom")));
            out.write(Boolean.toString(soundEnabled));
            for (int i = 0; i < 5; i++) {
                out.write(Integer.toString(highscores[i]));
            }

        } catch (IOException e) {
        } finally {
            try {
                if (out != null)
                    out.close();
            } catch (IOException e) {
            }
        }
    }

    public static void addScore(int score) {
        for (int i = 0; i < 5; i++) {
            if (highscores[i] < score) {
                for (int j = 4; j > i; j--)
                    highscores[j] = highscores[j - 1];
                highscores[i] = score;
                break;
            }
        }
    }
}

从上面的代码看出,声音设置和分数榜都是存在一个后缀名为.mrnom的文件中