如何用Android分页修复?
// Construct query for first 25 cities, ordered by populationQuery first = db.collection("cities") .orderBy("population") .limit(25);first.get() .addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() { @Override public void onSuccess(QuerySnapshot documentSnapshots) { // ... // Get the last visible document DocumentSnapshot lastVisible = documentSnapshots.getDocuments() .get(documentSnapshots.size() -1); // Construct a new query starting at this document, // get the next 25 cities. Query next = db.collection("cities") .orderBy("population") .startAfter(lastVisible) .limit(25); // Use the query for pagination // ... }});
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测试不通过,什么原因,如何修复