How to import Android sudio

I import the project but not run this project .
my step:
step 1:
start android studio ---> import project--->select android-PullRefreshLayout-master folder
step 2:
android studio build

错误:FAILURE: Build failed with an exception.
- What went wrong:
Task '' not found in root project 'android-PullRefreshLayout-master'.
- Try:
Run gradle tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Start by reopening the android-PullRefreshLayout-master folder in Android Studio and reproducing the reported build failure. Run the suggested Gradle tasks command at the project root to inspect available tasks; done means the project imports, builds, and can run successfully.

Written by the indexing model from the issue text.