/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.material.demo.codelab.buildingbeautifulapps;
import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.android.volley.toolbox.NetworkImageView;
import com.google.gson.reflect.TypeToken;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
/**
* Main activity for Shrine that displays a listing of available products.
*/
public class MainActivity extends AppCompatActivity {
private static final String TAG = MainActivity.class.getSimpleName();
private ProductAdapter adapter;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.shr_main);
Toolbar appBar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(appBar);
ArrayList<ProductEntry> products = readProductsList();
ImageRequester imageRequester = ImageRequester.getInstance(this);
final RecyclerView recyclerView = (RecyclerView) findViewById(R.id.product_list);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new ProductAdapter(products, imageRequester);
recyclerView.setAdapter(adapter);
}
private ArrayList<ProductEntry> readProductsList() {
InputStream inputStream = getResources().openRawResource(R.raw.products);
Type productListType = new TypeToken<ArrayList<ProductEntry>>() {}.getType();
try {
return JsonReader.readJsonStream(inputStream, productListType);
} catch (IOException e) {
Log.e(TAG, "Error reading JSON product list", e);
return new ArrayList<>();
}
}
private static final class ProductAdapter extends RecyclerView.Adapter<ProductViewHolder> {
private List<ProductEntry> products;
private final ImageRequester imageRequester;
ProductAdapter(List<ProductEntry> products, ImageRequester imageRequester) {
this.products = products;
this.imageRequester = imageRequester;
}
void setProducts(List<ProductEntry> products) {
this.products = products;
notifyDataSetChanged();
}
@Override
public ProductViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
return new ProductViewHolder(viewGroup);
}
@Override
public void onBindViewHolder(ProductViewHolder viewHolder, int i) {
viewHolder.bind(products.get(i), imageRequester);
}
@Override
public int getItemCount() {
return products.size();
}
}
private static final class ProductViewHolder extends RecyclerView.ViewHolder {
private final NetworkImageView imageView;
private final TextView priceView;
ProductViewHolder(ViewGroup parent) {
super(LayoutInflater.from(parent.getContext()).inflate(
R.layout.shr_product_entry, parent, false));
imageView = (NetworkImageView) itemView.findViewById(R.id.image);
priceView = (TextView) itemView.findViewById(R.id.price);
itemView.setOnClickListener(clickListener);
}
private final View.OnClickListener clickListener =
new View.OnClickListener() {
@Override
public void onClick(View v) {
ProductEntry product = (ProductEntry) v.getTag(R.id.tag_product_entry);
// TODO: show product details
}
};
void bind(ProductEntry product, ImageRequester imageRequester) {
itemView.setTag(R.id.tag_product_entry, product);
imageRequester.setImageFromUrl(imageView, product.url);
priceView.setText(product.price);
}
}
}