57. A Layout Editor Sample Data Tutorial

The CardDemo project created in the previous chapter has provided a good example of how it can be difficult to assess from within the layout editor exactly how a user interface is going to appear until the completed app is tested. This is a problem that frequently occurs when the content to be displayed in a user interface is only generated or acquired once the user has the app installed and running.

For some time now, the Android Studio layout editor has provided the ability to specify simple attributes that are active only when the layout is being designed. A design-time only string resource could, for example, be assigned to a TextView within the layout editor that would not appear when the app runs. ...

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