LATEST UPDATE:
Use the official version from jCenter instead.
dependencies {
compile 'com.android.volley:volley:1.0.0'
}
The dependencies below points to deprecated volley that is no longer maintained.
ORIGINAL ANSWER
You can use this in dependency section of your build.gradle file to use volley
dependencies {
compile 'com.mcxiaoke.volley:library-aar:1.0.0'
}
UPDATED:
Its not official but a mirror copy of official Volley. It is regularly synced and updated with official Volley Repository so you can go ahead to use it without any worry.