tools:context=".MainActivity"
时间: 2023-12-11 10:02:20 浏览: 114
MainActivity.java
The tools:context=".MainActivity" is an attribute used in Android development to specify the context of the layout file. It is used to provide a preview of the layout file in Android Studio's Design View.
In this case, the attribute is set to MainActivity, which means that the layout file is associated with the MainActivity class in the app. This allows the layout file to access the resources and variables defined in the MainActivity class, and provides a context for the layout file to be displayed in the preview window.
Overall, the tools:context attribute is a useful tool for Android developers to ensure that their layout files are correctly associated with the corresponding activity or fragment class in their app.
阅读全文