效果图预览
绘制思路
这里使用了中学解析几何知识 XPoint = OPointX = OPointXcosθ; YPoint = OPointY = OPointYsinθ;
canvas.drawText(lists.get(i).getName(), XPoint + (float) Math.cos(pere * i + 5) * radius[i % radius.length] - 30, YPoint + (float) Math.sin(pere * i + 5) * radius[i % radius.length] + 35, paint);
用法
1、XML布局(PS要根据自己的包名) <com.gkzy.relation.CirclePeopleView android:id="@+id/layout_cricle_people" android:layout_width="match_parent" android:layout_height="280dp" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> 2. peopleView = findViewById(R.id.layout_cricle_people); 3. 添加数据,刷新UI peopleView.SetFieldInfo(lists); peopleView.invalidate(); 4.添加了view的点击事件,通过手势判断。原理: 每个圆的Cx,Cy,r都能获取到,然后通过已知数据计算RectF的 left, top, right, bottom /** * Create a new rectangle with the specified coordinates. Note: no range * checking is performed, so the caller must ensure that left <= right and * top <= bottom. * * @param left The X coordinate of the left side of the rectangle * @param top The Y coordinate of the top of the rectangle * @param right The X coordinate of the right side of the rectangle * @param bottom The Y coordinate of the bottom of the rectangle */ public RectF(float left, float top, float right, float bottom) { this.left = left; this.top = top; this.right = right; this.bottom = bottom; } 得到RectF后判断contains(x,y)来获得点击的位置
项目源码:GitHub - chenhua1008611/Co-People: 仿天眼查关系图的生成,自定义view,随机颜色,随机大小