/
HomeFragment.java
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/
HomeFragment.java
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package net.simplifiedcoding.wallpaperhub.fragments;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ProgressBar;
import android.widget.Toast;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import net.simplifiedcoding.wallpaperhub.R;
import net.simplifiedcoding.wallpaperhub.adapters.CategoriesAdapter;
import net.simplifiedcoding.wallpaperhub.models.Category;
import java.util.ArrayList;
import java.util.List;
/**
* Created by Belal on 4/20/2018.
*/
public class HomeFragment extends Fragment {
private List<Category> categoryList;
private ProgressBar progressBar;
private DatabaseReference dbCategories;
private RecyclerView recyclerView;
private CategoriesAdapter adapter;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_home, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
progressBar = view.findViewById(R.id.progressbar);
progressBar.setVisibility(View.VISIBLE);
recyclerView = view.findViewById(R.id.recycler_view);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 2));
categoryList = new ArrayList<>();
adapter = new CategoriesAdapter(getActivity(), categoryList);
recyclerView.setAdapter(adapter);
dbCategories = FirebaseDatabase.getInstance().getReference("categories");
dbCategories.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
progressBar.setVisibility(View.GONE);
for (DataSnapshot ds : dataSnapshot.getChildren()) {
String name = ds.getKey();
String desc = ds.child("desc").getValue(String.class);
String thumb = ds.child("thumbnail").getValue(String.class);
Category c = new Category(name, desc, thumb);
categoryList.add(c);
}
adapter.notifyDataSetChanged();
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}