The goal of this project is to design and layout a music playing app that displays the list of available songs in a ListView or a GridView, navigates to a details screen of the currently playing song, and uses explicit intents to navigate around the app.
Your activity layouts activity_blue_horn.xml, activity_legendary.xml, activity_suit_up.xml and activity_yellow_umbrella.xml are very similar, I recommend that you use only one and reusing it by changing programmatically the values that needs changing, in your case only the TextView's text seems to differ