Android开发仿IOS滑动开关实现代码

Android开发仿IOS滑动开关实现代码

Android与iOS相比，ios好多控件都是自带的，而android需要使用自定义来实现。今天说的是ios的滑动开关，我层看到好多博客都是通过自定义ToggleButton实现的。这里我通过自定义view来实现他的效果。

首先在onsizechange里把2个半圆和一个矩形绘制出来。

width = w;    height = h;    left = top = 0;    right = width;    bottom = height * 0.8f;    cx = (right + left) / 2;    cy = (bottom + top) / 2;    RectF rectF = new RectF(left, top, bottom, bottom);    path.arcTo(rectF, 90, 180);    rectF.left = right - bottom;    rectF.right = right;    path.arcTo(rectF, 270, 180);    path.close();    circle_left = 0;    circle_right = bottom;    circle_width = circle_right - circle_left;    float circle_height = (bottom - top) / 2;    radius = circle_height * 0.9f;    borderwidth = (int) (2 * (circle_height - radius));    circle_cx = width - circle_height;