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RadioButton控件 RadioButton控件是单选按钮控件，它继承自Button控件，可以直接使用Button控件支持的各种属性和方法。与普通按钮不同的是，RadioButton控件多了一个可以选中的功能，能额外指定一个android：checked属性，该属性可以指定初始状态是否...

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RadioButton即单选按钮，它在开发中提供了一种“多选一”的操作模式，是Android开发中常用的一种组件，例如在用户注册时，选择性别时只能从“男”或者“女”中选择一个。与Web开发不同的是，在Android中可以使用RadioGroup来定义单选按钮...

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