libgdx 打飞机游戏实现教程

1:首先我们此游戏使用libgdx引擎，当然这个算是废话了。
2：我们使用libgdx引擎里面的Screen来作为我们的场景。
3：本讲首先来实现游戏中的第一个info界面，显示一个图标以及一个动画和一个返回按钮。

界面如下：

我们来看下代码实现：




package com.example.gamedemo;


import android.util.Log;


import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.ScreenAdapter;
import com.badlogic.gdx.graphics.g2d.Animation;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureAtlas;
import com.badlogic.gdx.graphics.g2d.TextureAtlas.AtlasRegion;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.ImageButton;
import com.badlogic.gdx.scenes.scene2d.ui.ImageButton.ImageButtonStyle;
import com.badlogic.gdx.scenes.scene2d.utils.ClickListener;
import com.badlogic.gdx.scenes.scene2d.utils.TextureRegionDrawable;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.Timer;
import com.badlogic.gdx.utils.Timer.Task;


public class InfoScreen extends ScreenAdapter {


Stage Ui;
SpriteBatch Batch;
private TextureAtlas atlas;
private Sprite sprite;
private Sprite Title;
FirstGame Gm;
Animation flyMove;
Array<TextureRegion> keyFramesArray = new Array<TextureRegion>();
float stateTime = 0f;
float x, y;
int regionWidth, regionHeight;
AtlasRegion Region;
float flyMovex;
ImageButton Back;


public InfoScreen(FirstGame tGm) {
// TODO Auto-generated constructor stub
this.Gm = tGm;


Batch = new SpriteBatch();
Ui = new Stage(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
atlas = new TextureAtlas(Gdx.files.internal("shoot_background.pack"));
sprite = atlas.createSprite("background");
sprite.setSize(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
Title = atlas.createSprite("shoot_copyright");
Region = atlas.findRegion("game_loading3");
flyMovex = (Gdx.graphics.getWidth() - Region.getRegionWidth()) / 2;
keyFramesArray.add(atlas.findRegion("game_loading1"));
keyFramesArray.add(atlas.findRegion("game_loading2"));
keyFramesArray.add(atlas.findRegion("game_loading3"));
keyFramesArray.add(atlas.findRegion("game_loading4"));
flyMove = new Animation(0.3f, keyFramesArray);
x = (Gdx.graphics.getWidth() - Title.getWidth()) / 2;
y = (Gdx.graphics.getHeight() - (Title.getHeight() + 150));
regionWidth = Title.getRegionWidth();
regionHeight = Title.getRegionHeight();
Title.setPosition(x, y);


ImageButtonStyle style = new ImageButtonStyle();
style.imageUp = new TextureRegionDrawable(
atlas.findRegion("btn_finish"));
style.imageDown = new TextureRegionDrawable(
atlas.findRegion("btn_finish"));
Back = new ImageButton(style);


Back.addListener(new ClickListener() {
public void clicked(InputEvent event, float x, float y) {
Gm.EndGame();


}
});
Back.setX(Gdx.graphics.getWidth() - Back.getWidth() - 2);
Back.setY(10);
Ui.addActor(Back);
Gdx.input.setInputProcessor(Ui);


new Timer().scheduleTask(new Task() {


@Override
public void run() {
// TODO Auto-generated method stub
Log.i("lxmlxm", "timer ok!");
Gm.setScreen(new GameScreen(Gm));
}
}, 3);


}


@Override
public void render(float delta) {
// TODO Auto-generated method stub
super.render(delta);
Batch.begin();
sprite.draw(Batch);
Title.draw(Batch);
stateTime += delta;
TextureRegion frame = flyMove.getKeyFrame(stateTime, true);
Batch.draw(frame, flyMovex, y - 80 - Region.getRegionHeight());
Batch.end();
Ui.draw();


}


@Override
public void resume() {
// TODO Auto-generated method stub
super.resume();
Gdx.input.setInputProcessor(Ui);
}


@Override
public void pause() {
// TODO Auto-generated method stub
super.pause();
Gdx.input.setInputProcessor(null);
}


@Override
public void hide() {
// TODO Auto-generated method stub
super.hide();
}


@Override
public void dispose() {
// TODO Auto-generated method stub
super.dispose();
Batch.dispose();
Ui.dispose();
atlas.dispose();


}


}




这个界面相对来说比较简单，只是一个image 一个动画 以及一个button组合在一起，button增加退出实现。
添加一个timer实现3s跳到游戏主界面中，开始真正的打飞机游戏了。