LiveData.getValue() returns null with Room

Question

Java POJO Object

public class Section {

    @ColumnInfo(name=\"section_id\")
    public int mSectionId;

    @ColumnInfo(name=\"section_name\")
    public S         


        

Answer 1

if sections.getValue() is null I have to call api for data and insert in into the database

You can handle this at onChange method:

sections.observe(this, new Observer>() {
    @Override
    public void onChanged(@Nullable List
 sections){
         if(sections == null || sections.size() == 0) {
             // No data in your database, call your api for data
         } else {
             // One or more items retrieved, no need to call your api for data.
         }
    }
});

But you should better put this Database/Table initialization logic to a repository class. Check out Google's sample. See DatabaseCreator class.