private void startRefresh(boolean isUserInitiated, boolean isSwipeInitiated) {
if (mIsRefreshing) {
return;
}
mIsRefreshing = true;
mIsRefreshUserInitiated = isUserInitiated;
// Clear the list adapter to trigger the empty list display.
mAdapter.clear();
Collection<String> urls = UrlManager.getInstance(this).getUrls(true);
if (urls.isEmpty()) {
finishRefresh();
} else {
// Show the swipe-to-refresh busy indicator for refreshes initiated by a swipe.
if (isSwipeInitiated) {
mSwipeRefreshWidget.setRefreshing(true);
}
// Update the empty list view to show a scanning animation.
mEmptyListText.setText(R.string.physical_web_empty_list_scanning);
mScanningImageView.setImageResource(R.drawable.physical_web_scanning_animation);
mScanningImageView.setColorFilter(null);
AnimationDrawable animationDrawable = (AnimationDrawable) mScanningImageView.getDrawable();
animationDrawable.start();
resolve(urls);
}
// Clear stored URLs and resubscribe to Nearby.
PhysicalWeb.startPhysicalWeb((ChromeApplication) getApplicationContext());
}
private void finishRefresh() {
// Hide the busy indicator.
mSwipeRefreshWidget.setRefreshing(false);
// Stop the scanning animation, show a "nothing found" message.
mEmptyListText.setText(R.string.physical_web_empty_list);
int tintColor = ContextCompat.getColor(this, R.color.physical_web_logo_gray_tint);
mScanningImageView.setImageResource(R.drawable.physical_web_logo);
mScanningImageView.setColorFilter(tintColor, PorterDuff.Mode.SRC_IN);
// Record refresh-related UMA.
if (!mIsInitialDisplayRecorded) {
mIsInitialDisplayRecorded = true;
PhysicalWebUma.onUrlsDisplayed(this, mAdapter.getCount());
} else if (mIsRefreshUserInitiated) {
PhysicalWebUma.onUrlsRefreshed(this, mAdapter.getCount());
}
mIsRefreshing = false;
}
