Place Autocomplete not working properly Android

Question

I have added the Place Autocomplete to my app but when I touch the search button it comes and then disappearing. I couldn't type in the search it disappearing. Disappearing means there's search bar but if we touch googles search bar will come out and we can type there. But It's coming and then it suddenly disappears.

This is the code in XML.

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="?attr/colorPrimary"
    app:popupTheme="@style/AppTheme.PopupOverlay">

    <fragment
         android:id="@+id/place_autocomplete_fragment"
         android:name="com.google.android.gms.location.places.ui.PlaceAutocompleteFragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
</android.support.v7.widget.Toolbar>

Answer 1

it's working and Android API key should be added to the manifest! So it will work !https://developers.google.com/places/android-api/?