QueueAdapter.java revision a907614755847b2630561a1e5949b2b416600d97 
1/*
2 * Copyright (C) 2015 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
17package com.example.android.supportv4.media;
18
19import com.example.android.supportv4.R;
20import android.app.Activity;
21import android.support.v4.media.session.MediaSessionCompat;
22import android.view.LayoutInflater;
23import android.view.View;
24import android.view.ViewGroup;
25import android.widget.ArrayAdapter;
26import android.widget.ImageView;
27import android.widget.TextView;
28
29import java.util.ArrayList;
30
31/**
32 * A list adapter for items in a queue
33 */
34public class QueueAdapter extends ArrayAdapter<MediaSessionCompat.QueueItem> {
35
36    // The currently selected/active queue item Id.
37    private long mActiveQueueItemId = MediaSessionCompat.QueueItem.UNKNOWN_ID;
38
39    public QueueAdapter(Activity context) {
40        super(context, R.layout.media_list_item, new ArrayList<MediaSessionCompat.QueueItem>());
41    }
42
43    public void setActiveQueueItemId(long id) {
44        this.mActiveQueueItemId = id;
45    }
46
47    private static class ViewHolder {
48        ImageView mImageView;
49        TextView mTitleView;
50        TextView mDescriptionView;
51    }
52
53    public View getView(int position, View convertView, ViewGroup parent) {
54        ViewHolder holder;
55
56        if (convertView == null) {
57            convertView = LayoutInflater.from(getContext())
58                    .inflate(R.layout.media_list_item, parent, false);
59            holder = new ViewHolder();
60            holder.mImageView = (ImageView) convertView.findViewById(R.id.play_eq);
61            holder.mTitleView = (TextView) convertView.findViewById(R.id.title);
62            holder.mDescriptionView = (TextView) convertView.findViewById(R.id.description);
63            convertView.setTag(holder);
64        } else {
65            holder = (ViewHolder) convertView.getTag();
66        }
67
68        MediaSessionCompat.QueueItem item = getItem(position);
69        holder.mTitleView.setText(item.getDescription().getTitle());
70        if (item.getDescription().getDescription() != null) {
71            holder.mDescriptionView.setText(item.getDescription().getDescription());
72        }
73
74        // If the itemId matches the active Id then use a different icon
75        if (mActiveQueueItemId == item.getQueueId()) {
76            holder.mImageView.setImageDrawable(
77                    getContext().getResources().getDrawable(R.drawable.ic_equalizer_white_24dp));
78        } else {
79            holder.mImageView.setImageDrawable(
80                    getContext().getResources().getDrawable(R.drawable.ic_play_arrow_white_24dp));
81        }
82        return convertView;
83    }
84}
85