在Android View中，在外面画一个虚线圆圈和圆圈

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.View;

public class DashedCircleView extends View {

    private Paint paint;
    private Path path;
    private float radius;

    public DashedCircleView(Context context) {
        super(context);
        init();
    }

    public DashedCircleView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public DashedCircleView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        path = new Path();
        radius = 100; // 设置圆圈半径
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        int centerX = getWidth() / 2;
        int centerY = getHeight() / 2;

        // 绘制虚线圆圈
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(5);
        DashPathEffect dashPathEffect = new DashPathEffect(new float[]{10, 10}, 0);
        paint.setPathEffect(dashPathEffect);
        path.reset();
        path.addCircle(centerX, centerY, radius, Path.Direction.CW);
        canvas.drawPath(path, paint);

        // 绘制实心圆圈
        paint.setStyle(Paint.Style.FILL);
        paint.setColor(Color.BLUE);
        canvas.drawCircle(centerX, centerY, radius / 2, paint);
    }
}