To empty the trash on Android, you need to follow these steps:

1. Open the “Gallery” app or the “Files” app on your Android device.
2. Tap on the three-dot menu icon in the top right corner of the screen.
3. Select “Trash” or “Recycle Bin” from the dropdown menu.
4. Tap on the “Empty Trash” or “Empty Recycle Bin” button.
5. A confirmation message will appear, asking if you want to permanently delete the items in the trash. Tap “OK” to confirm and empty the trash.

Note: Depending on your Android device and version, the process may vary slightly, but the basic steps are the same.