Search in firebase database for android?

问题

project name > users > user1key > name , latitude , longitude

user2key > name , latitude , longitude

This is the tree in database. I want a query to search the user using its name. and get its details.

回答1:

Something like this should do the trick:

DatabaseReference ref = FirebaseDatabase.getInstance().getReference("users");
ref.orderByChild("name").equalTo("Yash Mehta").addListenerForSingleValueEvent(new ValueEventListener() {
  @Override
  public void onDataChange(DataSnapshot dataSnapshot) {
    for (DataSnapshot userSnapshot: dataSnapshot.getChildren()) {
      System.out.println(userSnapshot.getKey());
      System.out.println(userSnapshot.child("Name").getValue(String.class));
    }
  }

  @Override
  public void onCancelled(DatabaseError databaseError) {
    throw databaseError.toException();
  }
});

回答2:

you are looking for something like the following.

This is example search name

refDatabase.child("users").orderByChild("user2key").orderByChild("name").equalTo("search here word").addListenerForSingleValueEvent(
    new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            //data will be available on dataSnapshot.getValue();
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Log.w(TAG, "getUser:onCancelled", databaseError.toException());
        }
});

If it does not meet the requirements try these

How to search for a value in firebase Android

How to search data in Firebase?

How to Search for data in Firebase Android

来源：https://stackoverflow.com/questions/45931126/search-in-firebase-database-for-android