Editor

SkusAdapter.java

/*
 * Copyright 2017 Google Inc. All Rights Reserved.
 *
 * 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 com.example.billingmodule.skulist;

import static java.lang.annotation.RetentionPolicy.SOURCE;

import android.support.annotation.IntDef;
import android.support.v7.widget.RecyclerView;
import android.view.ViewGroup;
import com.example.billingmodule.skulist.row.RowDataProvider;
import com.example.billingmodule.skulist.row.RowViewHolder;
import com.example.billingmodule.skulist.row.SkuRowData;
import com.example.billingmodule.skulist.row.UiManager;
import java.lang.annotation.Retention;
import java.util.List;

/**
 * Adapter for a RecyclerView that shows SKU details for the app.
 * <p>
 *     Note: It's done fragment-specific logic independent and delegates control back to the
 *     specified handler (implemented inside AcquireFragment in this example)
 * </p>
 */
public class SkusAdapter extends RecyclerView.Adapter<RowViewHolder> implements RowDataProvider {
    /**
     * Types for adapter rows
     */
    @Retention(SOURCE)
    @IntDef({TYPE_HEADER, TYPE_NORMAL})
    public @interface RowTypeDef {}
    public static final int TYPE_HEADER = 0;
    public static final int TYPE_NORMAL = 1;

private UiManager mUiManager;
    private List<SkuRowData> mListData;

void setUiManager(UiManager uiManager) {
        mUiManager = uiManager;
    }

void updateData(List<SkuRowData> data) {
        mListData = data;
        notifyDataSetChanged();
    }

@Override
    public @RowTypeDef int getItemViewType(int position) {
        return mListData == null ? TYPE_HEADER : mListData.get(position).getRowType();
    }

@Override
    public RowViewHolder onCreateViewHolder(ViewGroup parent, @RowTypeDef int viewType) {
        return mUiManager.onCreateViewHolder(parent, viewType);
    }

@Override
    public void onBindViewHolder(RowViewHolder holder, int position) {
        mUiManager.onBindViewHolder(getData(position), holder);
    }

@Override
    public int getItemCount() {
        return mListData == null ? 0 : mListData.size();
    }

@Override
    public SkuRowData getData(int position) {
        return mListData == null ? null : mListData.get(position);
    }
}