java

Error using getLoaderManager().initLoader public class CatalogActivity extends AppCompatActivity implements LoaderManager.LoaderCallbacks<Cursor> { private static final int PET_LOADER = 0; PetCursorAdapter mCursorAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_catalog); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View…

Here is my first activity public class FirstActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_first); } public void addNumbers() { //// } } public class SecondActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);…