styles.xml -- 将android:visibility的值改为visible #31
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我们测试时，一开始应用没有菜单栏，且主界面的删除行为有bug。最后才发现是action bar这里“android:visibility”被设置为gone（彻底隐藏）了。改成visible就好了。有些学校的软件工程实践活动要让开发这个工程，对于缺乏经验的学生来说，这个地方会造成不小的麻烦；这个修改应该能帮到许多人。
echar1
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有些学校的软件工程课要让开发这个工程；这里设为gone会使一些模拟环境下显示不出菜单栏，对于缺乏经验的学生来说，会造成不小的麻烦；这个修改应该能帮到许多人。