In Android API provide an example where accessibility `flagRetrieveInteractiveWindows` is needed.
Mar 11, 5:13pm

A common use case for the flagRetrieveInteractiveWindows flag in Android's AccessibilityService is when you need to interact with or retrieve information from all interactive windows on the device, not just the currently focused one. This is especially useful in scenarios like:

Example: Multi-display or Multi-window Support
When building an AccessibilityService that needs to interact with windows on secondary displays (e.g., in a multi-display Android setup), you must use flagRetrieveInteractiveWindows. Without this flag, the service may only retrieve the active window on the primary display, and the list of windows on other displays could be empty or incomplete.

Configuration Example:

xml
<accessibility-service
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:accessibilityEventTypes="typeAllMask"
    android:accessibilityFlags="flagDefault|flagRetrieveInteractiveWindows"
    android:canRetrieveWindowContent="true" />

In this setup, the service can now access and interact with windows across all displays, allowing you to perform actions like clicking on elements in a secondary display or retrieving content from popups and overlays that are not currently focused.

Why is this needed?

  • Without flagRetrieveInteractiveWindows, AccessibilityService.getWindows() may return an incomplete or empty list for non-focused displays.
  • It ensures your service can access all interactive windows, which is critical for advanced use cases like multi-display support or overlay interaction.

Would you like a code snippet demonstrating how to use this in practice?

Mar 11, 5:13pm

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