Android中的自定义对象点击问题

I have created an custom view in android to display ball on screen. Now what I want is when I touch on that ball it should explode in four parts and every part should move different four directions ie up, down, left, right. I know I have to set touch listener to detect touch on ball but then how to create a explode effect?_{This issue is solved now}. I'm displaying multiple balls on screen so that user can click on it and explode them.

这是我的自定义视图：

public class BallView extends View {
    private float x;
    private float y;
    private final int r;
    public BallView(Context context, float x1, float y1, int r) {
        super(context);
        this.x = x1;
        this.y = y1;
        this.r = r;
    }
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawCircle(x, y, r, mPaint);
    }

}

SmallBall 具有类似的属性，除了方向和爆炸方法（用于沿方向移动它）和动画标志（用于阻止其移动）之外。

private final int direction;
private boolean anim;

public void explode() {
    // plus or minus x/y based on direction and stop animation if anim flag is false
    invalidate();
}

我的布局xml如下：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout android:id="@+id/main_view"
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="#FF66FF33" />

我将 BallView 和 SmallBall 添加到活动类中，如下所示：

final FrameLayout mainFrameLayout = (FrameLayout) findViewById(R.id.main_frame_layout);

SmallBall[] smallBalls = new SmallBall[4];
smallBalls[0] = new SmallBall(getApplicationContext(), 105, 100, 10, 1, false);
smallBalls[0].setVisibility(View.GONE);
mainFrameLayout .addView(smallBalls[0]);
// create and add other 3 balls with different directions.

BallView ball = new BallView(getApplicationContext(), 100, 100, 25, smallBalls);
listener = new MyListener(ball);
ball.setOnClickListener(listener);

mainFrameLayout.addView(ball);

我在不同位置添加多个 BallView 及其相对的 SmallBall 数组。现在，无论我点击屏幕上最后添加的 BallView 的哪个位置，都会发生什么情况开始爆炸。之后倒数第二个，依此类推。所以这里有两个问题：

1. 为什么无论我点击屏幕的哪个位置都会调用 onClick/onTouch 事件？它应该只在我单击特定的 BallView 时调用侦听器事件。
2. 其次，为什么 BallView 开始以与添加到布局相反的方式爆炸？

我的监听器类：

public void onClick(View v) {
        BallView ballView = (BallView) v;
        ballView.setVisibility(View.GONE);
        //get small balls associated with this ball.
        //loop through small ball and call their explode method.
    }

_{I've trimmed code due to character limitation in question.}

我认为您不需要在画布中对所有这些进行硬编码。您可以致电ball.setVisibility(View.GONE)在触摸监听器中并使用以下命令显示 4 个额外的球smallBall.setVisibility(View.Visible)对于每个小球。这样您就可以隐藏大球并显示小球。 现在对于移动效果，每个smallBall中都可以有一个需要传递方向的方法，你可以像这样调用smallBall.explode(direction)。该方法的实现可以是

explode(int direction){//can be String
  if(direction=NORTH)
     y--;
  //other condition checks
}

Explode 方法将根据传递的方向开始更改它们的 x 和 y 坐标。 我希望这能为您提供有关如何实施它的提示。