How to use

requestLayout

method

in

com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView

/**
 * Sets the image orientation. It's best to call this before setting the image file or asset, because it may waste
 * loading of tiles. However, this can be freely called at any time.
 * @param orientation orientation to be set. See ORIENTATION_ static fields for valid values.
 */
public final void setOrientation(int orientation) {
  if (!VALID_ORIENTATIONS.contains(orientation)) {
    throw new IllegalArgumentException("Invalid orientation: " + orientation);
  }
  this.orientation = orientation;
  reset(false);
  invalidate();
  requestLayout();
}

/**
 * Called by worker task when preview image is loaded.
 */
private synchronized void onPreviewLoaded(Bitmap previewBitmap) {
  debug("onPreviewLoaded");
  if (bitmap != null || imageLoadedSent) {
    previewBitmap.recycle();
    return;
  }
  if (pRegion != null) {
    bitmap = Bitmap.createBitmap(previewBitmap, pRegion.left, pRegion.top, pRegion.width(), pRegion.height());
  } else {
    bitmap = previewBitmap;
  }
  bitmapIsPreview = true;
  if (checkReady()) {
    invalidate();
    requestLayout();
  }
}

/**
 * Called by worker task when full size image bitmap is ready (tiling is disabled).
 */
private synchronized void onImageLoaded(Bitmap bitmap, int sOrientation, boolean bitmapIsCached) {
  debug("onImageLoaded");
  // If actual dimensions don't match the declared size, reset everything.
  if (this.sWidth > 0 && this.sHeight > 0 && (this.sWidth != bitmap.getWidth() || this.sHeight != bitmap.getHeight())) {
    reset(false);
  }
  if (this.bitmap != null && !this.bitmapIsCached) {
    this.bitmap.recycle();
  }
  if (this.bitmap != null && this.bitmapIsCached && onImageEventListener!=null) {
    onImageEventListener.onPreviewReleased();
  }
  this.bitmapIsPreview = false;
  this.bitmapIsCached = bitmapIsCached;
  this.bitmap = bitmap;
  this.sWidth = bitmap.getWidth();
  this.sHeight = bitmap.getHeight();
  this.sOrientation = sOrientation;
  boolean ready = checkReady();
  boolean imageLoaded = checkImageLoaded();
  if (ready || imageLoaded) {
    invalidate();
    requestLayout();
  }
}

requestLayout();

/**
 * Sets the image orientation. It's best to call this before setting the image file or asset, because it may waste
 * loading of tiles. However, this can be freely called at any time.
 */
public final void setOrientation(int orientation) {
  if (!VALID_ORIENTATIONS.contains(orientation)) {
    throw new IllegalArgumentException("Invalid orientation: " + orientation);
  }
  this.orientation = orientation;
  reset(false);
  invalidate();
  requestLayout();
}

/**
 * Called by worker task when preview image is loaded.
 */
private synchronized void onPreviewLoaded(Bitmap previewBitmap) {
  debug("onPreviewLoaded");
  if (bitmap != null || imageLoadedSent) {
    previewBitmap.recycle();
    return;
  }
  if (pRegion != null) {
    bitmap = Bitmap.createBitmap(previewBitmap, pRegion.left, pRegion.top, pRegion.width(), pRegion.height());
  } else {
    bitmap = previewBitmap;
  }
  bitmapIsPreview = true;
  if (checkReady()) {
    invalidate();
    requestLayout();
  }
}

/**
 * Called by worker task when full size image bitmap is ready (tiling is disabled).
 */
private synchronized void onImageLoaded(Bitmap bitmap, int sOrientation, boolean bitmapIsCached) {
  debug("onImageLoaded");
  // If actual dimensions don't match the declared size, reset everything.
  if (this.sWidth > 0 && this.sHeight > 0 && (this.sWidth != bitmap.getWidth() || this.sHeight != bitmap.getHeight())) {
    reset(false);
  }
  if (this.bitmap != null && !this.bitmapIsCached) {
    this.bitmap.recycle();
  }
  if (this.bitmap != null && this.bitmapIsCached && onImageEventListener!=null) {
    onImageEventListener.onPreviewReleased();
  }
  this.bitmapIsPreview = false;
  this.bitmapIsCached = bitmapIsCached;
  this.bitmap = bitmap;
  this.sWidth = bitmap.getWidth();
  this.sHeight = bitmap.getHeight();
  this.sOrientation = sOrientation;
  boolean ready = checkReady();
  boolean imageLoaded = checkImageLoaded();
  if (ready || imageLoaded) {
    invalidate();
    requestLayout();
  }
}

requestLayout();