Android自定义View底部连续圆环效果

废话不多说先上效果图

蓝框部分为自定义View 

红框部分为效果所在

直接上源码核心也就40多行，也比较简单

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RelativeLayout;


/**
 * Created by yufeng on 2016/10/31.
 */

public class BottomHalfCircleRelativeLayout extends RelativeLayout {

    private int width = 0;
    private int count;
    private int height;

    private Paint paint;

    private int color;
    private int halfRadius;//px单位
    private float leftSpace = halfRadius;

    public BottomHalfCircleRelativeLayout(Context context) {
        this(context, null);
    }

    public BottomHalfCircleRelativeLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public BottomHalfCircleRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        if (attrs != null) {
            TypedArray ta = getContext().obtainStyledAttributes(attrs, R.styleable.BottomHalfRelativeLayout);
            color = ta.getColor(R.styleable.BottomHalfRelativeLayout_color, Color.WHITE);
            halfRadius = SM.dip2px(getContext(), ta.getInteger(R.styleable.BottomHalfRelativeLayout_halfRadius, 3) * 2);
        }

    }

    private void init() {

        if (getWidth() == 0) measure(0, 0);
        width = getMeasuredWidth();
        height = getMeasuredHeight();

        count = (width - halfRadius * 2) / halfRadius;//计算有多少个间隔和半圆  间隔是半圆-1
        //计算除了左边和右边 画间隔和半圆之后还空余的地方
        int space = (width - halfRadius * 2) % halfRadius;
        //因为间隔是半圆的-1  所以如果是双数就要删去一个位置
        if (count % 2 == 0) {
            //将空余位置space和双数删除的位置分配给两边
            leftSpace = halfRadius + space / 2f + halfRadius / 2f;
        } else {
            //将空余位置space分配给两边
            leftSpace = halfRadius + space / 2f;
        }

        paint = new Paint();
        paint.setAntiAlias(true);
        paint.setColor(color);

    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (width == 0) init();
        float x = leftSpace;
        float y = height - halfRadius / 2;
        for (int i = 0; i < count / 2; i++) {
            //画园

            RectF oval2 = new RectF(x, y, x + halfRadius, height + halfRadius / 2);// 设置个新的长方形，扫描测量
            canvas.drawArc(oval2, 180, 180, true, paint);

            //加上间隔
            x += halfRadius * 2;

        }

    }
}

attrs.xml中添加