MwBakker

public class WordRepository {

   private WordDao mWordDao;
   private LiveData<List<Word>> mAllWords;

   WordRepository(Application application) {
       WordRoomDatabase db = WordRoomDatabase.getDatabase(application);
       mWordDao = db.wordDao();
       mAllWords = mWordDao.getAllWords();
   }

MwBakker

   // inner-class, extends possibility of async (since only one can be extended at the time)
    // private so can't be a loose-filed class..
    // populates the DB with a dao coming from other thread(?)
    private static class PopulateDbAsync extends AsyncTask<Void, Void, Void> {

        private final StorageDao sDao;

        PopulateDbAsync(StorageDatabase db) { sDao = db.storageDao(); }

        @Override

MwBakker

<?xml version="1.0" encoding="utf-8"?>
<layout>
    
    <!-- possible data objects coming later -->
    
    <android.support.constraint.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"

MwBakker

// Works //

public class MainActivity extends AppCompatActivity {

            // ...
            
            @Override
            protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

MwBakker

public class StorageListAdapter extends RecyclerView.Adapter<StorageListAdapter.StorageViewHolder> {

    static RecyclerviewClickListener _listener;

    //
    //  internal class ViewHolder
    //
    static class StorageViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
    {
        // the repeating item in the adapter

MwBakker

package com.mwb.digitalstorage.database;

import android.app.Application;
import androidx.lifecycle.LiveData;
import android.os.AsyncTask;

import com.mwb.digitalstorage.model.Storage;

import java.util.List;

MwBakker

package com.mwb.digitalstorage.database;

import com.mwb.digitalstorage.model.Shelf;
import com.mwb.digitalstorage.model.Storage;

import androidx.lifecycle.LiveData;
import androidx.room.Dao;
import androidx.room.Insert;
import androidx.room.Query;

MwBakker

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>
        <variable
            name="vm"
            type="com.mwb.digitalstorage.viewmodel.ToolbarActivityViewModel"/>
    </data>

    <androidx.appcompat.widget.Toolbar

MwBakker

 public Boolean checkNewCat(String catName)
    {
        this.hasCategory.observe(this.getApplication(), new Observer<Boolean>() {
            @Override
            public void onChanged(Boolean aBoolean)
            {
                componentRepository.getComponentCategories().observe(this.getApplication(), new Observer<List<ComponentCat>>() {
                    @Override
                    public void onChanged(@Nullable final List<ComponentCat> componentCats)
                    {

MwBakker

package com.mwb.digitalstorage.adapter;

import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.mwb.digitalstorage.R;
import com.mwb.digitalstorage.StorageActivity;