Home | History | Annotate | Download | only in com.example.android.recyclerview 
      1 /*
      2 * Copyright (C) 2014 The Android Open Source Project
      3 *
      4 * Licensed under the Apache License, Version 2.0 (the "License");
      5 * you may not use this file except in compliance with the License.
      6 * You may obtain a copy of the License at
      7 *
      8 *      http://www.apache.org/licenses/LICENSE-2.0
      9 *
     10 * Unless required by applicable law or agreed to in writing, software
     11 * distributed under the License is distributed on an "AS IS" BASIS,
     12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13 * See the License for the specific language governing permissions and
     14 * limitations under the License.
     15 */
     16 
     17 package com.example.android.recyclerview;
     18 
     19 import com.example.android.common.logger.Log;
     20 
     21 import android.support.v7.widget.RecyclerView;
     22 import android.view.LayoutInflater;
     23 import android.view.View;
     24 import android.view.ViewGroup;
     25 import android.widget.TextView;
     26 
     27 /**
     28  * Provide views to RecyclerView with data from mDataSet.
     29  */
     30 public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.ViewHolder> {
     31     private static final String TAG = "CustomAdapter";
     32 
     33     private String[] mDataSet;
     34 
     35     // BEGIN_INCLUDE(recyclerViewSampleViewHolder)
     36     /**
     37      * Provide a reference to the type of views that you are using (custom ViewHolder)
     38      */
     39     public static class ViewHolder extends RecyclerView.ViewHolder {
     40         private final TextView textView;
     41 
     42         public ViewHolder(View v) {
     43             super(v);
     44             // Define click listener for the ViewHolder's View.
     45             v.setOnClickListener(new View.OnClickListener() {
     46                 @Override
     47                 public void onClick(View v) {
     48                     Log.d(TAG, "Element " + getAdapterPosition() + " clicked.");
     49                 }
     50             });
     51             textView = (TextView) v.findViewById(R.id.textView);
     52         }
     53 
     54         public TextView getTextView() {
     55             return textView;
     56         }
     57     }
     58     // END_INCLUDE(recyclerViewSampleViewHolder)
     59 
     60     /**
     61      * Initialize the dataset of the Adapter.
     62      *
     63      * @param dataSet String[] containing the data to populate views to be used by RecyclerView.
     64      */
     65     public CustomAdapter(String[] dataSet) {
     66         mDataSet = dataSet;
     67     }
     68 
     69     // BEGIN_INCLUDE(recyclerViewOnCreateViewHolder)
     70     // Create new views (invoked by the layout manager)
     71     @Override
     72     public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
     73         // Create a new view.
     74         View v = LayoutInflater.from(viewGroup.getContext())
     75                 .inflate(R.layout.text_row_item, viewGroup, false);
     76 
     77         return new ViewHolder(v);
     78     }
     79     // END_INCLUDE(recyclerViewOnCreateViewHolder)
     80 
     81     // BEGIN_INCLUDE(recyclerViewOnBindViewHolder)
     82     // Replace the contents of a view (invoked by the layout manager)
     83     @Override
     84     public void onBindViewHolder(ViewHolder viewHolder, final int position) {
     85         Log.d(TAG, "Element " + position + " set.");
     86 
     87         // Get element from your dataset at this position and replace the contents of the view
     88         // with that element
     89         viewHolder.getTextView().setText(mDataSet[position]);
     90     }
     91     // END_INCLUDE(recyclerViewOnBindViewHolder)
     92 
     93     // Return the size of your dataset (invoked by the layout manager)
     94     @Override
     95     public int getItemCount() {
     96         return mDataSet.length;
     97     }
     98 }
     99