Introduction - If you have any usage issues, please Google them yourself
This type of progress bar is a process that represents the operation, such as sending text messages, connecting the network, and so on, indicating that a process is executing.
As long as you define it in the XML layout, you can.
<progressBar android:id= "@+id/widget43""
Android:layout_width= "wrap_content""
Android:layout_height= "wrap_content""
Android:layout_gravity= "center_vertical" >
</ProgressBar>
At this point, the style is not set, so it is round and always rotates.