What reasons can lead to an unexpected application termination and return to the main screen without displaying errors?

Unexpected termination of an Android application and returning to the home screen without displaying errors can be caused by several reasons:

• Uncaught exceptions in the UI thread. If the app crashes due to a RuntimeException and there is no global error handler, the system simply closes the app.
• Memory issues (OutOfMemoryError), which cause the process to be killed.
• Errors in the Activity lifecycle, such as improper handling of fragments or resources, leading to a crash.
• Thread conflicts, when the UI thread is blocked or thread safety is violated.
• Incorrect handling of Intent or navigation, causing the app to restart.

To identify the cause, you should check logs via Logcat, use a debugger, and add exception handlers to display errors to the user or log them.