I'm trying to get data from Firestore then display it using a CardView.
It seems to get all the necessary code in, but when I run the app, no data is displayed. The app runs without crashing. I can't figure out where the problem is.
I'd be very grateful if someone could show me what I'm missing or where the wrong is.
Main Activity:
public class MainActivity extends AppCompatActivity implements
GoogleApiClient.OnConnectionFailedListener,
RestaurantAdapter.OnRestaurantSelectedListener {
private static final String TAG = "MainActivity";
private static final int RC_SIGN_IN = 9001;
// FireStore
@BindView(R.id.recycler_restaurants)
RecyclerView mRestaurantsRecycler;
private FirebaseFirestore mFirestore;
private Query mQuery;
private RestaurantAdapter mAdapter;
// FireStore END
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
// Enable Firestore logging
FirebaseFirestore.setLoggingEnabled(true);
// Firestore
mFirestore = FirebaseFirestore.getInstance();
// Get ${LIMIT} restaurants
mQuery = mFirestore.collection("restaurants")
.limit(5);
// RecyclerView
mAdapter = new RestaurantAdapter(mQuery, this);
mRestaurantsRecycler.setLayoutManager(new LinearLayoutManager(this));
mRestaurantsRecycler.setAdapter(mAdapter);
}
@Override
protected void onStart() {
super.onStart();
// Start listening for Firestore updates
if (mAdapter != null) {
mAdapter.startListening();
}
}
@Override
protected void onResume() {
super.onResume();
if (mAdapter != null) {
mAdapter.stopListening();
}
}
@Override
public void onStop() {
super.onStop();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RC_SIGN_IN) {
}
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
@Override
public void onRestaurantSelected(DocumentSnapshot restaurant) {
}
Restaurant Adapter
public class RestaurantAdapter extends FireStoreAdapter<RestaurantAdapter.ViewHolder> {
public interface OnRestaurantSelectedListener {
void onRestaurantSelected(DocumentSnapshot restaurant);
}
private OnRestaurantSelectedListener mListener;
public RestaurantAdapter(Query query, OnRestaurantSelectedListener listener) {
super(query);
mListener = listener;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
return new ViewHolder(inflater.inflate(R.layout.item_restaurant, parent, false));
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.bind(getSnapshot(position), mListener);
}
static class ViewHolder extends RecyclerView.ViewHolder {
@BindView(R.id.restaurant_item_name)
TextView nameView;
@BindView(R.id.restaurant_item_description)
TextView descriptionView;
public ViewHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
}
public void bind(final DocumentSnapshot snapshot,
final OnRestaurantSelectedListener listener) {
Restaurant restaurant = snapshot.toObject(Restaurant.class);
nameView.setText(restaurant.getName());
descriptionView.setText(restaurant.getDescription());
// Click listener
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (listener != null) {
listener.onRestaurantSelected(snapshot);
}
}
});
}
}
Recycler:
<!-- Main Restaurants recycler -->
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_restaurants"
android:layout_width="368dp"
android:layout_height="wrap_content"
android:background="@android:color/white"
tools:listitem="@layout/item_restaurant"
tools:layout_editor_absoluteY="0dp"
tools:layout_editor_absoluteX="8dp" />
CardView:
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
app:cardElevation="10dp">
<LinearLayout
android:orientation="vertical"
android:padding="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/restaurant_item_name"
android:textSize="30sp"
android:textColor="@color/colorPrimaryDark"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/restaurant_item_description"
android:textSize="20sp"
android:textColor="@color/colorPrimaryDark"
android:textStyle="italic"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</android.support.v7.widget.CardView>
