Youtube API GoogleJsonResponseException: 403 Forbidden

Question

I'm Developing Android App using YOutube API. I meet a problem like that: com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 Forbidden

When I search video. I try many link like it but it not work for me.

I following these step: 1. Create Google console account. 2. Enable Youtube API V3 3. Create Dev Key(Android Key and Browser Key).

 query = youtube.search().list("id,snippet");
        query.setKey(KEY);          
        query.setType("video");
        query.setFields("items(id/videoId,snippet/title,snippet/description,snippet/thumbnails/default/url)"); 
SearchListResponse response = query.execute();

Hope anyone help me resolve this issue.