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Databases

Joseph Wagner
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Joseph Wagner
Android Development Techdegree Graduate 27,137 Points
Posted by Joseph Wagner
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Joseph Wagner
Android Development Techdegree Graduate 27,137 Points

Firebase - Reading Data

My data structure:

I'm having trouble reading values from Firebase. If I delete the timelog child then it seems as if Users is the root of the datasnapshot and it will function if I remove users like this:

uInfo.setFirstName(ds.child("yAnJF2IWhvTmJBWYY6FL6g7CzKB2-001").getValue(UserInfo.class).getFirstName());

I keep getting a null pointer exception if I try to access like I'm currently doing. How can I access the values from TimeLog?

Here's the data structure. data structure

private void showData(DataSnapshot dataSnapshot) {
        for(DataSnapshot ds : dataSnapshot.getChildren()){
            UserInfo uInfo = new UserInfo();
            uInfo.setFirstName(ds.child("Users/yAnJF2IWhvTmJBWYY6FL6g7CzKB2-001").getValue(UserInfo.class).getFirstName());

            String firstName = uInfo.getFirstName();
            welcome.setText("Hello there " +firstName);
        }
    }