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我正在制作一个 Android 应用程序。目标是制作圆圈，当被触摸时会发生一些事情。更详细地说，这个应用程序将显示 2 种类型的圆圈，一种是红色的，一种是绿色的。圆圈的颜色存储在 lastColor 变量中。颜色的目的是当用户“触摸”红色或绿色圆圈时会发生一些事情。例如，如果触摸一个绿色圆圈，则会将一个点添加到该分数中，或者如果单击一个红色圆圈，则活动会发生变化，但是当任何一个圆圈被单击时，都不会发生任何事情。这是 onTouch 方法

public boolean onTouch(View v, MotionEvent event) {
   int x = (int) event.getX();
   int y = (int) event.getY();
   if(isInsideCircle(x, y) ==  true){
      //Do your things here
       if(redColor == lastColor){
          Intent i = new Intent(v.getContext(), YouFailed.class);
          v.getContext().startActivity(i);
       } else {
           addPoints++;
       }
   }else {

   }
   return true;
}

这部分代码是无法正常运行的东西。这是下面的整个课程。

public class DrawingView extends View {

    public DrawingView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub

    }

    RectF rectf = new RectF(0, 0, 200, 0);

    private static final int w = 100;
    public static int lastColor = Color.BLACK;
    private final Random random = new Random();
    private final Paint paint = new Paint();
    private final int radius = 230;
    private final Handler handler = new Handler();
    public static int redColor = Color.RED;
    public static int greenColor = Color.GREEN;
    int randomWidth = 0;
    int randomHeight = 0;
    public static int addPoints = 0;

    private final Runnable updateCircle = new Runnable() {
        @Override
        public void run() {
            lastColor = random.nextInt(2) == 1 ? redColor : greenColor;
            paint.setColor(lastColor);
            invalidate();
            handler.postDelayed(this, 1000);
        }
    };

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();
        handler.post(updateCircle);
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        handler.removeCallbacks(updateCircle);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        // your other stuff here
        if (random == null) {
            randomWidth = (int) (random.nextInt(Math.abs(getWidth() - radius / 2)) + radius / 2f);
            randomHeight = (random.nextInt((int) Math.abs((getHeight() - radius / 2 + radius / 2f))));
        }
        else {
            randomWidth = (int) (random.nextInt(Math.abs(getWidth() - radius / 2)) + radius / 2f);
            randomHeight = (random.nextInt((int) Math.abs((getHeight() - radius / 2 + radius / 2f))));
        }

        canvas.drawCircle(randomWidth, randomHeight + radius / 2f, radius, paint);

        paint.setColor(Color.BLACK);
        paint.setTextSize(150);
        canvas.drawText("Score: " + addPoints, 120, 300, paint);
    }

    public boolean onTouch(View v, MotionEvent event) {
        int x = (int) event.getX();
        int y = (int) event.getY();
        if (isInsideCircle(x, y) == true) {
            //Do your things here
            if (redColor == lastColor) {
                Intent i = new Intent(v.getContext(), YouFailed.class);
                v.getContext().startActivity(i);
            }
            else {
                addPoints++;
            }
        }
        else {

        }
        return true;
    }

    public boolean isInsideCircle(int x, int y) {
        if ((((x - randomWidth) * (x - randomWidth)) + ((y - randomHeight) * (y - randomHeight))) < ((radius) * (radius)))
            return true;
        return false;
    }
}
4

1 回答 1

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您需要重写 onTouchEvent 函数。我测试了代码，它完全有效！另外，确保在 addPoints++ 之后返回 false 以确保只添加一个点。希望这对你有用！

@Override
public boolean onTouchEvent(MotionEvent event) {
    int x = (int) event.getX();
    int y = (int) event.getY();
    if (isInsideCircle(x, y)) {
        //Do your things here
        if (redColor == lastColor) {
            Intent i = new Intent(getContext(), null);
            getContext().startActivity(i);
        }
        else {
            addPoints++;
            return false;
        }
    }
    else {

    }
    return true;
}
于 2017-06-06T14:19:23.410 回答