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      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 package com.example.android.mediabrowserservice;
     17 
     18 import android.app.Activity;
     19 import android.media.session.MediaSession;
     20 import android.view.LayoutInflater;
     21 import android.view.View;
     22 import android.view.ViewGroup;
     23 import android.widget.ArrayAdapter;
     24 import android.widget.ImageView;
     25 import android.widget.TextView;
     26 
     27 import java.util.ArrayList;
     28 
     29 /**
     30  * A list adapter for items in a queue
     31  */
     32 public class QueueAdapter extends ArrayAdapter<MediaSession.QueueItem> {
     33 
     34     // The currently selected/active queue item Id.
     35     private long mActiveQueueItemId = MediaSession.QueueItem.UNKNOWN_ID;
     36 
     37     public QueueAdapter(Activity context) {
     38         super(context, R.layout.media_list_item, new ArrayList<MediaSession.QueueItem>());
     39     }
     40 
     41     public void setActiveQueueItemId(long id) {
     42         this.mActiveQueueItemId = id;
     43     }
     44 
     45     private static class ViewHolder {
     46         ImageView mImageView;
     47         TextView mTitleView;
     48         TextView mDescriptionView;
     49     }
     50 
     51     public View getView(int position, View convertView, ViewGroup parent) {
     52         ViewHolder holder;
     53 
     54         if (convertView == null) {
     55             convertView = LayoutInflater.from(getContext())
     56                     .inflate(R.layout.media_list_item, parent, false);
     57             holder = new ViewHolder();
     58             holder.mImageView = (ImageView) convertView.findViewById(R.id.play_eq);
     59             holder.mTitleView = (TextView) convertView.findViewById(R.id.title);
     60             holder.mDescriptionView = (TextView) convertView.findViewById(R.id.description);
     61             convertView.setTag(holder);
     62         } else {
     63             holder = (ViewHolder) convertView.getTag();
     64         }
     65 
     66         MediaSession.QueueItem item = getItem(position);
     67         holder.mTitleView.setText(item.getDescription().getTitle());
     68         if (item.getDescription().getDescription() != null) {
     69             holder.mDescriptionView.setText(item.getDescription().getDescription());
     70         }
     71 
     72         // If the itemId matches the active Id then use a different icon
     73         if (mActiveQueueItemId == item.getQueueId()) {
     74             holder.mImageView.setImageDrawable(
     75                     getContext().getDrawable(R.drawable.ic_equalizer_white_24dp));
     76         } else {
     77             holder.mImageView.setImageDrawable(
     78                     getContext().getDrawable(R.drawable.ic_play_arrow_white_24dp));
     79         }
     80         return convertView;
     81     }
     82 }
     83