Add AutoCompleteTextview To Your App 1)Navigate to activity_main.xml .You have to add some code here. Watch the above video for reference . After adding the code, your activity_main.xml will look like this: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity"> <AutoCompleteTextView android:id="@+id/autocompleteView" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_align...