- 提示:Hardcoded string "用户名", should use @string resource
解决:https://blog.csdn.net/zhandoushi1982/article/details/8675756
2.页面布局不见了
解决:https://blog.csdn.net/zhandoushi1982/article/details/8675756
3.Failed to load AppCompat ActionBar with unknown error.
解决:<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar"></style>