所以我正在尝试制作一个游戏,其中有一个上下移动的方 block ,然后有从右侧出现并向左滑动的红色方 block 。到目前为止,我只设法使一个红色方 block 随机出现并向左滑动,但我似乎无法制作其他方 block 。我想做的是设置类似计时器的东西,以便每隔一秒左右就会随机出现一个新的红色方 block 。当我运行游戏时,所发生的只是看到一个正方形,并且有一个红色正方形从右到左。请告诉我可以添加什么以使更多的红色方 block 出现。请帮忙。
代码:
public class Game extends Activity implements OnTouchListener {
GameView gameView;
Bitmap square;
Bitmap redSquare;
float x, y;
Random random;
float redSquareY, redSquareX;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
gameView = new GameView(this);
gameView.setOnTouchListener(this);
square = BitmapFactory.decodeResource(getResources(), R.drawable.square);
redSquare = BitmapFactory.decodeResource(getResources(), R.drawable.redsquare);
x = y = 200;
setContentView(gameView);
redSquare = BitmapFactory.decodeResource(getResources(), R.drawable.redsquare);
random = new Random();
redSquareX = 500;
redSquareY = random.nextInt(400);
}
@Override
protected void onPause() {
super.onPause();
gameView.pause();
}
@Override
protected void onResume() {
super.onResume();
gameView.resume();
}
public class GameView extends SurfaceView implements Runnable{
Thread thread = null;
SurfaceHolder holder;
boolean running = false;
Canvas canvas;
public GameView(Context context) {
super(context);
holder = getHolder();
}
@Override
public void run() {
while(running == true){
if(!holder.getSurface().isValid()){
continue;
}
canvas = holder.lockCanvas();
canvas.drawRGB(100, 100, 100);
canvas.drawBitmap(square, x - (square.getWidth()/2), y - (square.getHeight()/2), null);
canvas.drawBitmap(redSquare, redSquareX, redSquareY, null);
holder.unlockCanvasAndPost(canvas);
y = y + 4;
redSquareX = redSquareX - 1;
}
}
public void pause(){
running = false;
while(true){
try{
thread.join();
} catch (InterruptedException e){
e.printStackTrace();
} break;
} thread = null;
}
public void resume(){
running = true;
thread = new Thread(this);
thread.start();
}
}
@Override
public boolean onTouch(View view, MotionEvent event) {
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
switch(event.getAction()){
case MotionEvent.ACTION_DOWN:
y = y - 100;
break;
}
return true;
}
}
最佳答案
我对你的设置有点困惑,但我会尝试一下。
if(System.nanoTime() - lastSquareTime > 1500000000) {
startRedSquares();
}
这段代码不应该出现在onCreate中。 onCreate 只被调用一次,所以它永远不会用这个 if 语句开始创建更多的红色方 block 。您应该在 run 方法(即游戏循环)中检查该计时器。所以,更像这样:
while(running == true){
if(!holder.getSurface().isValid()){
continue;
}
canvas = holder.lockCanvas();
canvas.drawRGB(100, 100, 100);
canvas.drawBitmap(square, x - (square.getWidth()/2), y - (square.getHeight()/2), null);
canvas.drawBitmap(redSquare, redSquareX, redSquareY, null);
holder.unlockCanvasAndPost(canvas);
y = y + 4;
if(SOME TIMER HAS EXPIRED) {
//add another red square to the list
//reset timer
}
//DECREMENT THE TIMER
//CHECK IF ANY SQUARE IS OFF THE SCREEN AND REMOVE IT FROM LIST
//LOOP THROUGH LIST AND MOVE ALL REDSQUARES
redSquareX = redSquareX - 1;
}
或者,我还建议为您的 redsquares 创建一个类,然后创建 RedSquare 对象的 ArrayList。然后,当您循环访问每个 RedSquare 对象时,可以调用它们自己的方法(updateMovement、checkIfOffScreen、drawRedSquare)或任何您想要调用的方法。
关于java - 位图从右侧随机出现的游戏,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31798320/