YouTube 썸네일(Thumbnail)

* activity_mythumbnail.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <com.google.android.youtube.player.YouTubeThumbnailView
        android:id="@+id/thumbnail"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitXY"
        android:adjustViewBounds="true" />

</LinearLayout>

* MyThumbnail.java

public class MyThumbnail extends AppCompatActivity implements YouTubeThumbnailView.OnInitializedListener {

    public static final String API_KEY = "API_KEY";
    private YouTubeThumbnailLoader youTubeThumbnailLoader;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_intro);
		
        YouTubeThumbnailView thumbnail = findViewById(R.id.thumbnail);
        thumbnail.initialize(API_KEY, this);
	}

    @Override
    public void onInitializationFailure(YouTubeThumbnailView thumbnailView, YouTubeInitializationResult errorReason) {

    }

    @Override
    public void onInitializationSuccess(YouTubeThumbnailView thumbnailView, YouTubeThumbnailLoader thumbnailLoader) {
        youTubeThumbnailLoader = thumbnailLoader;
        thumbnailLoader.setOnThumbnailLoadedListener(new ThumbnailListener());

        youTubeThumbnailLoader.setVideo(VIDEO_ID);
    }

    private final class ThumbnailListener implements YouTubeThumbnailLoader.OnThumbnailLoadedListener {
        @Override
        public void onThumbnailLoaded(YouTubeThumbnailView thumbnail, String videoId) {

        }

        @Override
        public void onThumbnailError(YouTubeThumbnailView thumbnail, YouTubeThumbnailLoader.ErrorReason reason) {

        }
    }

}