How to select all in gmail app android

How do I delete all the emails on Gmail? To empty your Gmail inbox quickly, go to the Gmail search field and enter in:inbox. Select the checkbox at the top of the Select column to choose all the emails, and then choose Archive to archive them or select the trash can to delete them.

To select multiple e-mail messages in Gmail for Android, you have to tap the tiny check boxes to the left of each message. If you miss the check box and tap the message instead, the message launches and you have to go back to the conversation list and try again.