implementation

HomeActivity.java

public class HomeActivity extends AppCompatActivity {

    private RecyclerView rvSubject;
    private SubjectAdapter subjectAdapter;
    private ArrayList<Subject> subjects;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initComponents();

        subjects = prepareData();

        subjectAdapter = new SubjectAdapter(subjects, HomeActivity.this);
        LinearLayoutManager manager = new LinearLayoutManager(HomeActivity.this);
        rvSubject.setLayoutManager(manager);
        rvSubject.setAdapter(subjectAdapter);
    }
}