@Override
protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
final int maxWidth =
getResources().getDimensionPixelSize(R.dimen.multiple_attachment_preview_width);
final int maxHeight =
getResources().getDimensionPixelSize(R.dimen.multiple_attachment_preview_height);
final int width = Math.min(MeasureSpec.getSize(widthMeasureSpec), maxWidth);
final int height = maxHeight;
final int cellWidth = width / GRID_WIDTH;
final int cellHeight = height / GRID_HEIGHT;
final int count = mPreviewViews.size();
final int padding =
getResources().getDimensionPixelOffset(R.dimen.multiple_attachment_preview_padding);
for (int i = 0; i < count; i++) {
final View view = mPreviewViews.get(i).view;
final Tile imageTile = mCurrentLayout.tiles.get(i);
view.measure(
imageTile.getWidthMeasureSpec(cellWidth, padding),
imageTile.getHeightMeasureSpec(cellHeight, padding));
// Now that we know the size, we can request an appropriately-sized image.
if (view instanceof AsyncImageView) {
final ImageRequestDescriptor imageRequest =
AttachmentPreviewFactory.getImageRequestDescriptorForAttachment(
mPreviewViews.get(i).attachment, view.getMeasuredWidth(), view.getMeasuredHeight());
((AsyncImageView) view).setImageResourceId(imageRequest);
}
if (i == count - 1 && mPlusTextView != null) {
// The plus text view always covers the last attachment.
mPlusTextView.measure(
imageTile.getWidthMeasureSpec(cellWidth, padding),
imageTile.getHeightMeasureSpec(cellHeight, padding));
}
}
setMeasuredDimension(width, height);
}
private void buildViews(
final Iterable<MessagePartData> attachments,
final ArrayList<ViewWrapper> previousViews,
final Rect transitionRect) {
final LayoutInflater layoutInflater = LayoutInflater.from(getContext());
final int count = mCurrentLayout.tiles.size();
int i = 0;
final Iterator<MessagePartData> iterator = attachments.iterator();
while (iterator.hasNext() && i < count) {
final MessagePartData attachment = iterator.next();
ViewWrapper attachmentWrapper = null;
// Try to recycle a previous view first
for (int j = 0; j < previousViews.size(); j++) {
final ViewWrapper previousView = previousViews.get(j);
if (previousView.attachment.equals(attachment)
&& !(previousView.attachment instanceof PendingAttachmentData)) {
attachmentWrapper = previousView;
previousViews.remove(j);
break;
}
}
if (attachmentWrapper == null) {
final View view =
AttachmentPreviewFactory.createAttachmentPreview(
layoutInflater,
attachment,
this,
AttachmentPreviewFactory.TYPE_MULTIPLE,
false /* startImageRequest */,
mAttachmentClickListener);
if (view == null) {
// createAttachmentPreview can return null if something goes wrong (e.g.
// attachment has unsupported contentType)
continue;
}
if (view instanceof AsyncImageView && mImageViewDelayLoader != null) {
AsyncImageView asyncImageView = (AsyncImageView) view;
asyncImageView.setDelayLoader(mImageViewDelayLoader);
}
addView(view);
attachmentWrapper = new ViewWrapper(view, attachment);
// Help animate from single to multi by copying over the prev location
if (count == 2 && i == 1 && transitionRect != null) {
attachmentWrapper.prevLeft = transitionRect.left;
attachmentWrapper.prevTop = transitionRect.top;
attachmentWrapper.prevWidth = transitionRect.width();
attachmentWrapper.prevHeight = transitionRect.height();
}
}
i++;
Assert.notNull(attachmentWrapper);
mPreviewViews.add(attachmentWrapper);
// The first view will animate in using PopupTransitionAnimation, but the remaining
// views will slide from their previous position to their new position within the
// layout
if (i == 0) {
AttachmentPreview.tryAnimateViewIn(attachment, attachmentWrapper.view);
}
attachmentWrapper.needsSlideAnimation = i > 0;
}
// Build the plus text view (e.g. "+2") for when there are more attachments than what
// this layout can display.
if (mPlusNumber > 0) {
mPlusTextView =
(TextView) layoutInflater.inflate(R.layout.attachment_more_text_view, null /* parent */);
mPlusTextView.setText(getResources().getString(R.string.attachment_more_items, mPlusNumber));
addView(mPlusTextView);
}
}
