Question

这是一个游戏项目。介绍项目并在虚拟机上运行后，它一直是黑框。没有游戏画面。

package com.badlogic.androidgames.jumper;

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 final static int[] highscores = new int[] { 100, 80, 50, 30, 10 };
    public final static String file = ".superjumper";

    public static void load(FileIO files) {
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(files.readFile(file)));  // 这里报异常
            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(file)));
            out.write(Boolean.toString(soundEnabled));
            out.write("\n");
            for(int i = 0; i < 5; i++) {
                out.write(Integer.toString(highscores[i]));
                out.write("\n");
            }

        } 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;
            }
        }
    }
}

我断点并调试错误是FileNotFoundException。我在superjumper中找不到mmnt/SdCard。

代码没有问题。为什么有例外？

Answer 1

在编译项目时，编译器无法查看文件“.superjumper”是否存在。
因为它会在运行时抛出异常，如果它找不到它。这就是这种情况。

您需要知道要加载的“.superjumper”文件的确切位置。

介绍android项目时的FileIO异常

1 个答案: