我想用自定义适配器填充ExpandableListView。
这是我填写它的方式，在我的活动中：
private void fillSeasons(Video video) {
if(video instanceof Series) {
Series series = (Series) video;
HashMap<Season, List<Episode>> map = new HashMap<Season, List<Episode>>();
for(Season season:series.getSeasons()) {
map.put(season, season.getEpisodes());
}
SeasonAdapter adapter = new SeasonAdapter(this,series.getSeasons(),map);
testSeason.setText(adapter.getGroupCount() + " seasons"); //A TextView to test adapter
listSeason.setAdapter(adapter);
}
else {
layoutSeasons.setVisibility(View.INVISIBLE);
}
}
这是我的自定义适配器：
public class SeasonAdapter extends BaseExpandableListAdapter {
private static final String LOG = SeasonAdapter.class.getSimpleName();
private static String PREFIX_IMAGE = TmdbService.PREFIX_IMAGE+TmdbService.POSTER_SIZES[3];
private Context context;
private List<Season> seasons; // header titles
// child data in format of header title, child title
private HashMap<Season, List<Episode>> episodes;
public SeasonAdapter(Context context, List<Season> seasons,
HashMap<Season, List<Episode>> episodes) {
this.context = context;
this.seasons = seasons;
this.episodes = episodes;
String msg = "Episodes:\n";
for(Season season:episodes.keySet()) {
msg += "Season "+season.getNumber()+" ("+season.getId()+")\n";
for(Episode episode:episodes.get(season)) {
msg+=episode.getNumber()+"-"+episode.getTitle()+"\n";
}
}
Log.d(LOG,msg);
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
Log.d(LOG,"getChild at position "+childPosititon+" of group "+groupPosition);
return this.episodes.get(this.seasons.get(groupPosition)).get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
Log.d(LOG,"getChildId: "+childPosition);
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_episode_item, null);
}
final Episode episode = (Episode) getChild(groupPosition, childPosition);
Log.d(LOG,"childView:"+ episode.getTitle());
TextView txtListChild = (TextView) convertView.findViewById(R.id.season_text);
txtListChild.setText(episode.getTitle());
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
Log.d(LOG,"getChildrenCount: "+this.episodes.get(this.seasons.get(groupPosition)).size());
return this.episodes.get(this.seasons.get(groupPosition)).size();
}
@Override
public Object getGroup(int groupPosition) {
Log.d(LOG,"getGroup at position "+groupPosition);
return this.seasons.get(groupPosition);
}
@Override
public int getGroupCount() {
Log.d(LOG,"getGroupCount: "+this.seasons.size());
return this.seasons.size();
}
@Override
public long getGroupId(int groupPosition) {
Log.d(LOG,"getGroupId: "+groupPosition);
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_season_group, null);
}
final Season season = (Season) getGroup(groupPosition);
Log.d(LOG,"groupView:"+ context.getString(R.string.season)+" "+season.getNumber());
TextView lblListHeader = (TextView) convertView.findViewById(R.id.season_title);
lblListHeader.setText(context.getString(R.string.season)+" "+season.getNumber());
return convertView;
}
@Override
public boolean hasStableIds() {
Log.d(LOG,"hasStableIds: false");
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
Log.d(LOG,"isChildSelectable: true");
return true;
}
}
我的问题是：参数＆＃34; groupPosition＆＃34;在方法getGroupView始终＆＃34; 0＆＃34;，但getGroupCount返回正确的值（在我的情况下为6）。
这是输出：
09-29 21:38:38.070 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ Episodes:
Season 1 (3572)
1-Chute libre
2-Le choix
3-Dérapage
4-Retour aux sources
5-Vivre ou survivre
6-Bluff
7-Le fruit défendu
Season 2 (3573)
1-Traqués
2-Chasse à l'homme
3-Alibi
4-Au fond du gouffre
5-Nouveau départ
6-Règlements de comptes
7-Poisson lune
8-Appelez donc Saule
9-Seuls au monde
10-Introspection
11-Nouvelle donne
12-Vie et mort
13-Effet papillon
Season 3 (3575)
1-No Mas
2-Caballo Sin Nombre
3-I.F.T.
4-Green Light
5-Retour aux affaires
6-Le Camping-Car
7-Vendetta
8-Prise de pouvoir
9-Kafkaïen
10-La Mouche
11-Société écran
12-Demi-mesures
13-Pleine mesure
Season 4 (3576)
1-Le Cutter
2-Snub 38
3-Motivations
4-Les Points importants
5-Nouveau Job
6-Guerre froide
7-Négociations
8-Frères et Partenaires
9-Incontrôlables
10-Salud
11-Seul contre tous
12-Échec
13-Mat
Season 0 (3577)
1-
2-
3-
4-
5-
6-
Season 5 (3578)
1-Vivre libre ou mourir
2-Madrigal
3-Nouveaux labos
4-Cinquante et un
5-Un plan presque parfait
6-Divergence
7-Heisenberg
8-Un nouveau jour se lève
9-Le prix du sang
10-Enterré
11-Confessions
12-Comme un chien enragé
13-Règlement de compte à Tohajiilee
14-Seul au monde
15-L'origine du mal
16-Revenir et mourir
09-29 21:38:38.070 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.070 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ hasStableIds: false
09-29 21:38:38.070 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.070 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.080 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.080 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroup at position 0
09-29 21:38:38.080 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ groupView:Season 0
09-29 21:38:38.080 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.080 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroup at position 0
09-29 21:38:38.090 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ groupView:Season 0
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroup at position 0
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ groupView:Season 0
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroup at position 0
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ groupView:Season 0
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroup at position 0
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ groupView:Season 0
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroup at position 0
09-29 21:38:38.130 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ groupView:Season 0
09-29 21:38:38.140 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.140 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroup at position 0
09-29 21:38:38.140 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ groupView:Season 0
09-29 21:38:38.140 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.140 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroup at position 0
09-29 21:38:38.140 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ groupView:Season 0
09-29 21:38:38.150 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroupCount: 6
09-29 21:38:38.150 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ getGroup at position 0
09-29 21:38:38.150 4199-4199/com.vwuilbea.mymoviecatalog D/SeasonAdapter﹕ groupView:Season 0
我不知道问题是否来自我的布局，如果是这样的话：
<RelativeLayout >
<!-- ... -->
<ParallaxScrollView >
<!-- ... -->
<!-- Season layout -->
<RelativeLayout
android:id="@+id/layout_seasons"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/minimum_margin"
android:layout_below="@id/layout_location">
<TextView
android:id="@+id/test_season"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/label_seasons"/>
<ExpandableListView
android:id="@+id/season_list"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_below="@id/test_season"
android:choiceMode="singleChoice" />
</RelativeLayout>
<!-- ... -->
</ParallaxScrollView>
</RelativeLayout>
list_season_group.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/season_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:textSize="@dimen/subtitle_medium_size_details"
android:textStyle="bold"
android:text="@string/hello_world"
tools:ignore="HardcodedText"/>
</LinearLayout>
最后，我的list_episode_item.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/episode_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:textSize="@dimen/subtitle_medium_size_details"
android:textStyle="bold"
android:text="@string/hello_world"
tools:ignore="HardcodedText"
/>
</LinearLayout>
我发现了我的问题来源：
我的ExpandableListView是一个ParallaxScrollView，所以如果它将list_height列表设置为＆＃34; wrap_content＆＃34;或＆＃34; match_parent＆＃34;，它不起作用（我不确切知道为什么？！）。我已经尝试将layout_height设置为200dp，它运行正常！
但是有人可以告诉我为什么？我怎么能正确地做到这一点？
（我是否必须打开一个新主题才能提出这个问题？）
答案 0 :(得分：0)
如果组位置始终为0，则表示您在同一季节中存储所有剧集。