java - 尝试在本地存储上读取/写入时出现 ".txt file not found"- Libgdx，Android studio

Question

我正在 Android studio 上使用 Libgdx 制作一个简单的游戏，并将我的高分记录为位于 android>assets 文件夹中的 txt 文件中的简单整数。在我的 GameOverState 中，我当前的分数与文本文件中的分数进行比较，如果它更大，则在 txt 文件中替换。 此外，每次我进入菜单状态时，都会从文件中读取高分并显示为位图字体。问题是:当我在桌面上运行它时，它工作正常，但是当我在模拟器中启动它时，会出现错误:

com.badlogic.gdx.utils.GdxRuntimeException:找不到文件:hs.txt(本地)

这是我的 GameOverState:

package com.asya.game.states;

import com.asya.game.Ozone;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;

public class GameOverState extends state {

public int sc;
private Texture bgr;
private BitmapFont scoreFont;

public String txtScore;
public Integer hs;
public SaveHS saving;

public GameOverState(GameStateManager gsm, int score) {
    super(gsm);
    bgr = new Texture("gameOver.png");
    sc = score;
    scoreFont = new BitmapFont();
    scoreFont.setColor(Color.WHITE);


    //write to file if score is greater than the previous score
    FileHandle file = Gdx.files.local("hs.txt");
    txtScore = file.readString();
    hs = Integer.parseInt(txtScore);
    if (score > hs){
        hs = score;
        txtScore = Integer.toString(hs);
        file.writeString(txtScore, false);
    }

    /*
    saving = new SaveHS();
    hs = saving.Load();
    if (score > hs) {
        hs = score;
        saving.Save(score);
    }
    */
    cam.setToOrtho(false, Ozone.WIDTH, Ozone.HEIGHT);
}

@Override
protected void handleInput() {
    if(Gdx.input.justTouched())
        gsm.set(new MenuState(gsm));

}

@Override
public void update(float dt) {
    handleInput();
}

@Override
public void render(SpriteBatch sb) {
    sb.begin();
    sb.setProjectionMatrix(cam.combined);
    sb.draw(bgr, cam.position.x - (cam.viewportWidth / 2), 0);
    scoreFont.draw(sb, "SCORE: " + sc, cam.position.x / 2 + 140, cam.position.y + 200);
    sb.end();
}

@Override
public void dispose() {
    bgr.dispose();
    scoreFont.dispose();
}

}

这是我的菜单状态:

package com.asya.game.states;

import com.asya.game.Ozone;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.utils.GdxRuntimeException;

import java.io.FileNotFoundException;
import java.io.ObjectOutputStream;

public class MenuState extends state implements InputProcessor{
private Texture background;
private Texture playBtn, helpBtn;
private Vector2 posPlayBtn, posHelpBtn;
private Rectangle boundPlayBtn, boundHelpBtn;
private String highScore;
private BitmapFont hScoreFont;

public SaveHS saving;
public int s;

public MenuState(GameStateManager gsm) {
    super(gsm);
    background = new Texture("bgr.png");
    playBtn = new Texture("play.png");
    helpBtn = new Texture("help.png");

    cam.setToOrtho(false, Ozone.WIDTH, Ozone.HEIGHT);

    posPlayBtn = new Vector2((Ozone.WIDTH / 2)- (playBtn.getWidth()/2), Ozone.HEIGHT/2 +playBtn.getHeight()/2);
    posHelpBtn = new Vector2((Ozone.WIDTH / 2) - (helpBtn.getWidth() / 2), Ozone.HEIGHT / 2 - helpBtn.getHeight() / 2);

    boundPlayBtn = new Rectangle(posPlayBtn.x, posPlayBtn.y, playBtn.getWidth(), playBtn.getHeight());
    boundHelpBtn = new Rectangle(posHelpBtn.x, posHelpBtn.y, helpBtn.getWidth(), helpBtn.getHeight());

    hScoreFont = new BitmapFont();
    hScoreFont.setColor(Color.WHITE);

        FileHandle file = Gdx.files.local("hs.txt");
        highScore = file.readString();

    /*
    saving = new SaveHS();
    s = saving.Load();
    */
    Gdx.input.setInputProcessor(this);
}

@Override
public void handleInput() {
}

@Override
public void update(float dt) {
    handleInput();
}

@Override
public void render(SpriteBatch sb) {
    //open sprite batch and close when done
    sb.setProjectionMatrix(cam.combined);
    sb.begin();
    sb.draw(background, cam.position.x - (cam.viewportWidth / 2), 0); //image, starting from coordinate 0, 0 (bottom left corner) and width and heiht
    hScoreFont.draw(sb, "HIGH SCORE: " + highScore,  cam.position.x / 2 + 140, cam.position.y + 200);
    sb.draw(playBtn, posPlayBtn.x, posPlayBtn.y);
    sb.draw(helpBtn, posHelpBtn.x, posHelpBtn.y );
    sb.end();
}

@Override
public void dispose() {
    background.dispose();
    playBtn.dispose();
    helpBtn.dispose();
    hScoreFont.dispose();
    System.out.println("Menu State Disposed");
}

@Override
public boolean keyDown(int keycode) {
    return false;
}

@Override
public boolean keyUp(int keycode) {
    return false;
}

@Override
public boolean keyTyped(char character) {
    return false;
}

@Override
public boolean touchDown(int screenX, int screenY, int pointer, int button) {
    if(boundPlayBtn.contains(Gdx.graphics.getWidth() - screenX, Gdx.graphics.getHeight() - screenY)){
        gsm.set(new playState(gsm));
    }
    if(boundHelpBtn.contains(Gdx.graphics.getWidth() - screenX, Gdx.graphics.getHeight() - screenY)){
        gsm.set(new helpingState(gsm));
    }
    return false;
}

@Override
public boolean touchUp(int screenX, int screenY, int pointer, int button) {
    return false;
}

@Override
public boolean touchDragged(int screenX, int screenY, int pointer) {
    return false;
}

@Override
public boolean mouseMoved(int screenX, int screenY) {
    return false;
}

@Override
public boolean scrolled(int amount) {
    return false;
}
}

Answer 1

为什么不使用首选项，了解更多信息here .

它处理所有设备上的所有保存，并且是 libGDX API 的一部分。

// Get an instance
Preferences prefs = Gdx.app.getPreferences("Highscores");

// Save a high score
prefs.putInteger("high1", 999);
// Make sure it is saved
prefs.flush();

// Get the high score (the 0 is default, in case no high1 is set yet)
int high1 = prefs.getInteger("high1", 0);

当 API 提供了执行此操作的方法时，您实际上不应该将高分保存在 .txt 中。