Android游戏开发教程：手教你写跳跃类游戏

 

Android游戏开发教程：手教你写跳跃类游戏

package jumpball.game;

import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.Window;
import android.view.WindowManager;

public class GameActivity extends Activity {
    GameView mView;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);// 设置无标题
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);// 设置全屏模式
        //获取系统的屏幕属性
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);

        mView = new GameView(this, dm.widthPixels, dm.heightPixels);
        //应用这个布局
        setContentView(mView);
    }
}

GameView.java

package jumpball.game;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.SurfaceHolder.Callback;

//本身就是一个Runnable接口
public class GameView extends SurfaceView implements Callback, Runnable {
    public int width, height;
    private Canvas mCanvas;
    //刷新界面线程
    private Thread mThread;
    //处理者
    private SurfaceHolder mSurfaceHolder;
    private boolean mIsRunning = false;
    private int TIME_IN_FRAME = 50;
    GameActivity gameActivity;

    public GameView(Context context, int width, int height) {
        super(context);
        //setFocusable(true);
        //activity是 context的一个子类。
        gameActivity = (GameActivity) context;
        this.width = width;
        this.height = height;

        mSurfaceHolder = getHolder();
        mSurfaceHolder.addCallback(this);
    }

    public void mDraw() {
        //设置画布的颜色
        mCanvas.drawColor(Color.WHITE);
        drawBG(mCanvas);
    }

    public void drawBG(Canvas mCanvas) {
        Paint mPaint = new Paint();
        mPaint.setColor(Color.BLACK);
        //设置透明度
        mPaint.setAlpha(50);
        //设置抗锯齿
        mPaint.setAntiAlias(true);
        float h = height * 0.01666667f;
        for (int i = 0; i < height; i += h) {
            mCanvas.drawLine(0, i, width, i, mPaint);
        }
    }
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
    }

    public void surfaceCreated(SurfaceHolder holder) {
        mIsRunning = true;
        //新建一个刷屏线程
        mThread = new Thread(this);
        mThread.start();
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        //销毁这个，
        mIsRunning=false;
    }

    public void run() {
        //决定线程是否继续执行
        while (mIsRunning) {
            long startTime = System.currentTimeMillis();
            //调用mDraw进行绘制
            synchronized (mSurfaceHolder) {
                mCanvas = mSurfaceHolder.lockCanvas();
                mDraw();
                mSurfaceHolder.unlockCanvasAndPost(mCanvas);
            }

            long endTime = System.currentTimeMillis();

            int diffTime = (int) (endTime - startTime);

            while (diffTime < TIME_IN_FRAME) {
                diffTime = (int) (System.currentTimeMillis() - startTime);
                Thread.yield();
            }
        }
    }
}
游戏介绍：这次编写的游戏是一款跳跃类游戏,类似与涂鸦跳跃。我们通过小球触碰方块，完成小球的跳跃。我们将在这一列的博客中来实现这款游戏的开发。
小小游戏，只供娱乐！！！