摘要：
今天在写一段代码时，两个Activity的Button设置了相同的ID，竟然没有报错。然后查看R.java文件，发现class id中也只生成了一个Button变量，且分别在两个Activity中进行访问时均可达到预期效果，觉得奇怪。一，查阅google帮助文档，现引用如下：IDsViews may have an integer id associated with them. These ids are typically assigned in the layout XML files, and are used to find specific views within the vie 阅读全文
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