31 if we use push method to save the object,has a unique id,how to get the useful data?
like tha,how can i get the Chat?
DatabaseReference ref = FirebaseDatabase.getInstance().getReference();
ref.limitToLast(5).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot snapshot) {
for (DataSnapshot msgSnapshot: snapshot.getChildren()) {
Chat msg = msgSnapshot.getValue(Chat.class);
Log.i("Chat", chat.getName()+": "+chat.getText());
}
}
@Override
public void onCancelled(DatabaseError firebaseError) {
Log.e("Chat", "The read failed: " + firebaseError.getText());
}
});
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can read all the Chat
