ImageView返回其边界的所有错误值

public class Terrain {

    public Bitmap tile;
    public InputStream is;
    public ObjectAnimator moveLeft;
    public Drawable tileDrawable;
    public Rect bounds;
    public ImageView terrainImage;

    public int top = 0;
    public int bottom = 0;
    public int left = 0;
    public int right = 0;
}
public class Terrain {

    public Bitmap tile;