Go to your <b>Google Cloud Project</b> and open <b>Menu</b>
Go to <b>APIs & services </b>and Click <span class=""><i><b> Credentials </b></i></span>
Click <span class="component"><i><b> Create credentials </b></i></span>
Click <span class="component"><i><b> API key </b></i></span>
Click <span class="component"><i><b> Restrict key </b></i></span>
Click <b></b>on the <b>Name field</b>
Type <b>name</b> for your key
Click <span class="component"><i><b> Android apps </b></i></span>
Click <span class="component"><i><b> Add package name and fingerprint</b></i></span>
Type your android application package name in <b>P</b><b><i>ackage name</i></b>
Type your SHA-1 fingerprint of your keystore in <b><i>SHA-1 certificate fingerprint</i></b>
Click <span class=""><i><b> Save</b></i></span>
That's it. You're done. Now use that Key in your Settings.java file (GOOGLE_DEV_KEY).
The first step is to open <span class=""><i><b>Home - Offito-TUTORIAL</b></i></span> and click <span class=""><i><b>Products & services</b></i></span>
Click <span class="component"><i><b>APIs & services</b></i></span>
Click <span class="component"><i><b>Search for APIs & services</b></i></span>
Type **** in <span class="component"><i><b>Search for APIs & services</b></i></span>
Click <span class="component"><i><b> YouTube Data API v3 Google The YouTube Data API v3 is an API that provides access to YouTube data, such as videos, playlists,… </b></i></span>
Click <span class="component"><i><b> Enable </b></i></span>