以正東面為0度起點(diǎn)計(jì)算指定角度所對(duì)應(yīng)的圓周上的點(diǎn)的坐標(biāo)：

float radian = Math.toRadians(angle);
float x = center.x + Math.cos(radian)*currentAdius;
float y = center.y + Math.sin(radian)*currentAdius;

說(shuō)明
angle為弧度，center.x為圓心所在的X坐標(biāo)，center.y為圓心所在Y坐標(biāo)，currentAdius為圓的半徑