Android游戲開發教程：手教你寫跳躍類游戲

 

Android游戲開發教程：手教你寫跳躍類游戲

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);// 設置無標題
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);// 設置全屏模式
        //獲取系統的屏幕屬性
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);

        mView = new GameView(this, dm.widthPixels, dm.heightPixels);
        //應用這個布局
        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;

//本身就是一個Runnable接口
public class GameView extends SurfaceView implements Callback, Runnable {
    public int width, height;
    private Canvas mCanvas;
    //刷新界面線程
    private Thread mThread;
    //處理者
    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的一個子類。
        gameActivity = (GameActivity) context;
        this.width = width;
        this.height = height;

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

    public void mDraw() {
        //設置畫布的顏色
        mCanvas.drawColor(Color.WHITE);
        drawBG(mCanvas);
    }

    public void drawBG(Canvas mCanvas) {
        Paint mPaint = new Paint();
        mPaint.setColor(Color.BLACK);
        //設置透明度
        mPaint.setAlpha(50);
        //設置抗鋸齒
        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;
        //新建一個刷屏線程
        mThread = new Thread(this);
        mThread.start();
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        //銷毀這個，
        mIsRunning=false;
    }

    public void run() {
        //決定線程是否繼續執行
        while (mIsRunning) {
            long startTime = System.currentTimeMillis();
            //調用mDraw進行繪制
            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();
            }
        }
    }
}
游戲介紹：這次編寫的游戲是一款跳躍類游戲,類似與塗鴉跳躍。我們通過小球觸碰方塊，完成小球的跳躍。我們將在這一列的博客中來實現這款游戲的開發。
小小游戲，只供娛樂！！！