The ability to deactivate the primary input method on an Android device offers a way to prevent unintended interactions. For example, a user might want to lock the display during media playback to avoid accidental pausing or skipping tracks. This action essentially renders the device unresponsive to direct contact with the display surface.
This functionality is valuable in several scenarios. It can be implemented to protect against accidental input when handing the device to a child or placing it in a bag. Historically, methods to achieve this involved third-party applications or specialized system settings accessible through developer options. Benefits include preventing unauthorized access in specific situations and extending battery life by minimizing unnecessary screen activity.