Java 尝试绘制自定义视图如何检测单击了哪个切片

我正在创建自定义视图，就像下面的屏幕一样。我可以绘制视图，但无法为每个视图创建单独的单击事件。如何为每个弧形视图设置单独的单击事件？。提前谢谢

代码如下：

ArcView.java

public class ItemView extends View {

Utils utils;

int left, right, top, bottom;

private int color;
private int start;
private int sweep;
private boolean inner;
private RectF oval;
public float center_x, center_y;
int divOn;
public float radius;

public ItemView(Context context, int color, int start, int sweep) {
    super(context);
    this.color = color;
    this.start = start;
    this.sweep = sweep;
    utils = Utils.getInstance(getContext());
}

public ItemView(Context context, int color, int start, int sweep, boolean inner, int divOn) {
    super(context);
    this.color = color;
    this.start = start;
    this.sweep = sweep;
    this.inner = inner;
    this.divOn = divOn;
    utils = Utils.getInstance(getContext());
}

public RectF getOval() {
    return oval;
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    //There is another flag for inner white circle
    if (inner) {
        float width = (float) getWidth();
        float height = utils.getScreenHeight() - utils.getActionBarSize();

        radius = (width - utils.dpTopixel(50)) / divOn;




        Path path = new Path();
        path.addCircle((width - utils.dpTopixel(50)) / divOn,
                (height - utils.dpTopixel(50)) / divOn, radius,
                Path.Direction.CW);

        Paint paint = new Paint();
        paint.setColor(ContextCompat.getColor(getContext(), color));
        paint.setStrokeWidth(5);
        paint.setStyle(Paint.Style.FILL);
        paint.setAntiAlias(true);


        final RectF oval = new RectF();
        paint.setStyle(Paint.Style.FILL);


        left = -(int) radius;
        right = (int) radius;
        top = (getHeight() / 2) - (int) radius;
        bottom = (getHeight() / 2) + (int) radius;

        oval.set(left,
                top,
                right,
                bottom);
        canvas.drawArc(oval, start, sweep, true, paint);
    } else {

        float width = (float) getWidth();
        float height = utils.getScreenHeight() - utils.getActionBarSize();
        float radius;
        radius = (width - utils.dpTopixel(50)) / divOn;

        Path path = new Path();
        path.addCircle((width - utils.dpTopixel(50)) / 1,
                (width - utils.dpTopixel(50)) / 1, radius,
                Path.Direction.CW);

        Paint paint = new Paint();
        paint.setColor(ContextCompat.getColor(getContext(), color));
        paint.setStrokeWidth(5);
        paint.setStyle(Paint.Style.FILL);
        paint.setAntiAlias(true);
        oval = new RectF();
        paint.setStyle(Paint.Style.FILL);



        TextPaint textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG | Paint.SUBPIXEL_TEXT_FLAG);
        textPaint.setColor(ContextCompat.getColor(getContext(), R.color.white));
        textPaint.setTextAlign(Paint.Align.CENTER);

        /*Paint.FontMetrics metrics = paint.getFontMetrics();
        float textheight = Math.abs(metrics.top - metrics.bottom);
        float x = getWidth() / 2;
        float y = (getHeight() / 2) + (height / 2);

        canvas.drawText("My Text", x, y, paint);*/





        left = -(int) radius;
        right = (int) radius;
        top = (getHeight() / 2) - (int) radius;
        bottom = (getHeight() / 2) + (int) radius;

        center_x = width / 2;
        center_y = utils.getOffset();

        int xPos = (getWidth() / 2);
        int yPos = (int) ((getHeight() / 2) - ((textPaint.descent() + textPaint.ascent()) / 2)) ;
        //((textPaint.descent() + textPaint.ascent()) / 2) is the distance from the baseline to the center.



        oval.set(left,
                top,
                right,
                bottom);
        canvas.drawArc(oval, start, sweep, true, paint);





    }
}

}

用于检测高度和宽度并转换为px的utils类

我想检查我点击哪个圆

---

创建一个选定的slice侦听器，覆盖自定义类中的

onTouchEvent

，使用x，y值计算触摸事件（动作向上）的哪个slice。然后，您可以从slice selected listener调用该函数，并传递有关选定切片的详细信息。

我想知道如何计算已接触的切片您应该能够计算到该点的角度和距离（）。您可以使用距离来确定接触点是否在“切片内”，并使用角度来确定选择哪个切片。