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magdamiu/MainActivity.java

Created December 28, 2020 21:23
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Slow rendering best practices
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MainActivity.java
// NOT OK
void onNewEmailsArrivedNotRecommended(List<Email> newEmails) {
emailAdapter.setEmails(newEmails);
emailAdapter.notifyDataSetChanged();
}
// OK
void onNewDataArrivedFastRendering(List<Email> newEmails) {
List<Email> oldEmails = emailAdapter.getEmails();
DiffUtil.DiffResult result = DiffUtil.calculateDiff(new EmailDiffCallback(oldEmails, newEmails));
emailAdapter.setEmails(newEmails);
result.dispatchUpdatesTo(emailAdapter);
}
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