Why are there a series of technical challenges behind “OMG buy it”>>>

Download a demo, and the display looks like this

How to deal with such problems

First check whether gradle has been downloaded

If the following text prompt is not downloaded, it may be caused by network problems

Gradle sync failed: Connection timed out: connect. If you are behind an HTTP proxy, please configure the proxy settings either in IDE or Gradle.

2. First check whether there is a lack of pointing interface in the configuration file androidmanifest.xml

If the previous two steps are confirmed and not handled well, it is to restart and have a look

3 restart