<include
android:id="@+id/app_activity_calculate_include"
layout="@layout/app_activity_calculate_include"></include>
新建layout：app_activity_calculate_include.xml
在该layout下构建UI，暴露根的id
使用include减少嵌套
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转载自blog.csdn.net/qq_39587209/article/details/79690244
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