GifImageView

GifImageView.java

public class GifImageView extends ImageView {
  private static final long DEFAULT_MOVIE_VIEW_DURATION = TimeUnit.SECONDS.toMillis(1);

  private Movie movie;

  private long movieStart;
  private int movieCurrentAnimationTime;

  private boolean running = false;
  private boolean visible = true;

  public GifImageView(Context context) {
    this(context, null);
  }

  public GifImageView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public GifImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init();
  }

  private void init() {
    setLayerType(View.LAYER_TYPE_SOFTWARE, null);
  }

  @Override protected void onDraw(Canvas canvas) {
    if (movie != null) {
      if (running) {
        updateAnimationTime();
        drawMovieFrame(canvas);
        invalidateView();
      } else {
        drawMovieFrame(canvas);
      }
    }
  }

  private void invalidateView() {
    if (visible) {
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        postInvalidateOnAnimation();
      } else {
        invalidate();
      }
    }
  }

  private void updateAnimationTime() {
    long now = android.os.SystemClock.uptimeMillis();

    if (movieStart == 0) {
      movieStart = now;
    }

    int duration = movie.duration();
    if (duration == 0) {
      duration = (int) DEFAULT_MOVIE_VIEW_DURATION;
    }

    movieCurrentAnimationTime = (int) ((now - movieStart) % duration);
  }

  private void drawMovieFrame(@NonNull Canvas canvas) {
    float scale = (float) this.getHeight() / (float) movie.height();

    movie.setTime(movieCurrentAnimationTime);
    canvas.save(Canvas.MATRIX_SAVE_FLAG);
    canvas.scale(scale, scale);
    movie.draw(canvas, ((canvas.getWidth() / scale) - movie.width()) / 2, 0);
    canvas.restore();
  }

  @SuppressLint("NewApi") @Override public void onScreenStateChanged(int screenState) {
    super.onScreenStateChanged(screenState);
    visible = screenState == SCREEN_STATE_ON;
    invalidateView();
  }

  @SuppressLint("NewApi") @Override protected void onVisibilityChanged(@NonNull View changedView, int visibility) {
    super.onVisibilityChanged(changedView, visibility);
    visible = visibility == View.VISIBLE;
    invalidateView();
  }

  @Override protected void onWindowVisibilityChanged(int visibility) {
    super.onWindowVisibilityChanged(visibility);
    visible = visibility == View.VISIBLE;
    invalidateView();
  }

  public void play() {
    if (movie != null) {
      running = true;
      movieStart = android.os.SystemClock.uptimeMillis() - movieCurrentAnimationTime;
      invalidate();
    }
  }

  public void setBanner(@NonNull Movie movie) {
    this.movie = movie;
  }
}

Based on https://github.com/Cutta/GifView <3