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

I would suggest to create another query without LiveData if you need to synchronously fetch data from database in your code.

DAO:

@Query("SELECT COUNT(*) FROM section")
int countAllSections();

ViewModel:

Integer countAllSections() {
    return new CountAllSectionsTask().execute().get();
}

private static class CountAllSectionsTask extends AsyncTask {

    @Override
    protected Integer doInBackground(Void... notes) {
        return mDb.sectionDAO().countAllSections();
    }
}