android - 如何在游戏结束屏幕上显示最终分数和高分？

Question

我正在使用 libgdx，我试图弄清楚如何显示我的玩家达到的最终分数，以及当游戏进入游戏画面时他们游戏的总体高分。我不确定如何将分数整数从游戏屏幕带到游戏结束屏幕。

标签： androidlibgdxpreferencespoints

Answer 1

选项 1：使用首选项存储高分

我认为您希望能够关闭游戏（关闭窗口或终止应用程序）并为下次有人玩游戏（执行游戏或打开应用程序）存储高分。

在这种情况下，偏好是要走的路，这是一个简单的例子：

游戏课

import com.badlogic.gdx.Game;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Preferences;

public class PreferenceExample extends Game {

    @Override
    public void create() {
        // Initialize the preferences
        Preferences preferences = Gdx.app.getPreferences("examplePreferences");
        // Go to your game screen sending this LibGDX Game and the LibGDX Preferences
        setScreen(new GameScreen(this, preferences));
    }
}

游戏画面类

import com.badlogic.gdx.Preferences;
import com.badlogic.gdx.ScreenAdapter;

class GameScreen extends ScreenAdapter {

    private PreferenceExample game;
    private Preferences preferences;

    GameScreen(PreferenceExample game, Preferences preferences) {
        // Store reference to LibGDX Game
        this.game = game;
        // Store reference to LibGDX Preferences
        this.preferences = preferences;
    }

    @Override
    public void render(float delta) {
        if (Gdx.input.isKeyJustPressed(Input.Keys.L)) {
            saveHighScore(MathUtils.random(3));
            goToGameOverScreen();
        }
    }

    // Call this whenever you want to save the high score
    private void saveHighScore(int highScore) {
        preferences.putInteger("High score", highScore);
        preferences.flush();
    }

    // Call this whenever you want to switch to the game over screen
    private void goToGameOverScreen() {
        game.setScreen(new GameOverScreen(preferences));
    }
}

游戏结束屏幕类

import com.badlogic.gdx.Preferences;
import com.badlogic.gdx.ScreenAdapter;

class GameOverScreen extends ScreenAdapter {

    private Preferences preferences;
    private int highScore;

    GameOverScreen(Preferences preferences) {
        // Store reference to LibGDX Preferences
        this.preferences = preferences;
    }

    @Override
    public void show() {
        // Load high score, default value is 0 in case you didn't store it properly
        highScore = preferences.getInteger("High score", 0);
    }

    @Override
    public void render(float delta) {
        // Do something with the high score you retrieved
        System.out.println(highScore);
    }
}

警告：请注意，存储和检索方法Preferences是区分大小写的，因此最好将String引用值放在变量上以最大程度地减少错误。

选项 2：在屏幕之间传递高分

也许您不需要在游戏关闭时存储高分，因此将高分信息从一个屏幕传递到另一个屏幕应该更容易，这里有一个示例：

游戏课

import com.badlogic.gdx.Game;

public class ScreenToScreenExample extends Game {

    @Override
    public void create() {
        // Go to your game screen sending this LibGDX Game and the LibGDX Preferences
        setScreen(new GameScreen(this));
    }
}

游戏画面类

import com.badlogic.gdx.ScreenAdapter;

class GameScreen extends ScreenAdapter {

    private ScreenToScreenExample game;
    private int highScore;

    GameScreen(ScreenToScreenExample game) {
        // Store reference to LibGDX Game
        this.game = game;
    }

    // Call this whenever you want to save the high score
    void saveHighScore(int highScore) {
        this.highScore = highScore;
    }

    // Call this whenever you want to switch to the game over screen
    void goToGameOverScreen() {
        game.setScreen(new GameOverScreen(highScore));
    }
}

游戏结束屏幕类

import com.badlogic.gdx.ScreenAdapter;

class GameOverScreen extends ScreenAdapter {

    private int highScore;

    GameOverScreen(int highScore) {
        this.highScore = highScore;
    }

    @Override
    public void render(float delta) {
        // Do something with the high score you retrieved
        System.out.println(highScore);
    }
}