Android 带有ListView的小部件显示';装载';对于找到的每个项目
我正试图为我的Android应用程序构建一个小部件,但我遇到了一个问题:虽然ListView确实找到了数据(通过调试器,我可以看到我的RemoteViewFactory实现中的getViewAt方法被调用并返回一个正确的RemoteView),但找到的每个条目在我的小部件中都显示为“正在加载…” 请注意:在我的数据库中确实找到了4个条目,getViewAt方法被调用了四次,每次都返回一个正确的列表项 我的代码基于,使用了作为技术参考的 在试图解决这个问题时,我咨询了stackoverflow并找到了一些。最常见的修复建议有:Android 带有ListView的小部件显示';装载';对于找到的每个项目,android,android-listview,android-widget,Android,Android Listview,Android Widget,我正试图为我的Android应用程序构建一个小部件,但我遇到了一个问题:虽然ListView确实找到了数据(通过调试器,我可以看到我的RemoteViewFactory实现中的getViewAt方法被调用并返回一个正确的RemoteView),但找到的每个条目在我的小部件中都显示为“正在加载…” 请注意:在我的数据库中确实找到了4个条目,getViewAt方法被调用了四次,每次都返回一个正确的列表项 我的代码基于,使用了作为技术参考的 在试图解决这个问题时,我咨询了stackoverflow并
- 确保getViewTypeCount方法返回的值不是0(通常是1,因为大多数小部件只使用一种视图类型)李>
- 确保只使用了一种方法李>
- 一些更模糊的建议,例如一些任意视图属性应该或不应该使用
<service
android:name=".widget.DfdWidgetService"
android:permission="android.permission.BIND_REMOTEVIEWS" />
<receiver android:name=".widget.DfdWidget">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/dfd_widget_info" />
</receiver>
小部件服务类
public class DfdWidget extends AppWidgetProvider {
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) {
Intent intent = new Intent(context, DfdWidgetService.class);
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.dfd_widget);
remoteViews.setRemoteAdapter(R.id.widgetRemindersListView, intent);
remoteViews.setEmptyView(R.id.widgetRemindersListView, R.id.widgetEmptyViewText);
// Instruct the widget manager to update the widget
appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// There may be multiple widgets active, so update all of them
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
@Override
public void onEnabled(Context context) {
super.onEnabled(context);
}
@Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
}
@Override
public void onRestored(Context context, int[] oldWidgetIds, int[] newWidgetIds) {
super.onRestored(context, oldWidgetIds, newWidgetIds);
}
}
public class DfdWidgetService extends RemoteViewsService {
@Override
public RemoteViewsFactory onGetViewFactory(Intent intent) {
return new DfdRemoteViewsFactory(getApplicationContext());
}
class DfdRemoteViewsFactory implements RemoteViewsService.RemoteViewsFactory {
private final Context context;
private ReminderRepository reminderRepository;
private List<Reminder> reminders;
public DfdRemoteViewsFactory(Context context) {
this.context = context;
this.reminderRepository = ReminderRepository.getReminderRepository(context);
}
@Override
public void onCreate() {
reminders = reminderRepository.getAllRemindersForTodayList();
}
@Override
public void onDataSetChanged() {
reminders = reminderRepository.getAllRemindersForTodayList();
}
@Override
public void onDestroy() {
reminders.clear();
}
@Override
public int getCount() {
return reminders.size();
}
@Override
public RemoteViews getViewAt(int position) {
Reminder reminder = reminders.get(position);
RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.id.widgetListItem);
remoteView.setTextViewText(R.id.widgetReminderName, reminder.getName());
// Removed code that sets the other fields as I tried it with and without and it didn't matter. So removed for brevity
return remoteView;
}
@Override
public RemoteViews getLoadingView() {
return null;
}
@Override
public int getViewTypeCount() {
return 1;
}
@Override
public long getItemId(int position) {
return reminders.get(position).getId();
}
@Override
public boolean hasStableIds() {
return true;
}
}
}
公共类DfdWidgetService扩展了RemoteViewsService{
@凌驾
公共远程视图工厂onGetViewFactory(意图){
返回新的DfdRemoteViewsFactory(getApplicationContext());
}
类DfdRemoteViewsFactory实现RemoteViewsService.RemoteViewsFactory{
私人最终语境;
私人催款催款催款催款催款催款催款催款催款催款;
私人名单提醒;
公共DfdRemoteViewsFactory(上下文){
this.context=上下文;
this.rementerrepository=rementerrepository.getrementerrepository(上下文);
}
@凌驾
public void onCreate(){
reminders=reminderRepository.getAllRemindersForTodayList();
}
@凌驾
公共无效onDataSetChanged(){
reminders=reminderRepository.getAllRemindersForTodayList();
}
@凌驾
公共空间{
提醒。清除();
}
@凌驾
public int getCount(){
返回提醒。大小();
}
@凌驾
公共远程视图getViewAt(内部位置){
提醒=提醒。获取(位置);
RemoteViews remoteView=新的remoteView(context.getPackageName(),R.id.widgetListItem);
remoteView.setTextViewText(R.id.widgetMemorinterName,remention.getName());
//删除了设置其他字段的代码,因为我尝试使用和不使用它们,但这并不重要。因此,为了简洁起见,删除了这些代码
返回远程视图;
}
@凌驾
公共远程视图getLoadingView(){
返回null;
}
@凌驾
public int getViewTypeCount(){
返回1;
}
@凌驾
公共长getItemId(int位置){
返回提醒。get(position.getId();
}
@凌驾
公共布尔表ID(){
返回true;
}
}
}
将布局资源ID作为第二个参数。您正在传递一个小部件ID
因此,将
R.id.widgetListItem
替换为R.layout.whateyourlayoutnameisforthelistems
,其中用列表项的布局名称替换whateyourlayoutnameisforthelistems
。RemoteViews-remoteView=新的远程视图(context.getPackageName(),R.id.widgetListItem)
–在getViewAt()
中,应该是R.layout
,而不是R.id
。可能只是一个输入错误,假设您将布局命名为相同的东西。另外,与当前问题无关,但是在布局中使用app
名称空间前缀的任何内容在remoteview
中都不起作用;e、 例如,app:srcCompat
。仅供参考。事实上,你的评论一针见血!您和Commonware都很快找到了这个!我不知道你和迈克怎么这么快就找到了,但是干杯@Lynxian:正如您所指出的,正确的计数显示了您的RemoteViewsService
正在被调用。对行布局XML的快速检查表明,“加载…”文本不是来自您的代码,这意味着小部件主机使用您的行有困难。这将问题限制在为行设置remoteview
的位置,而这只是几行代码。
public class DfdWidget extends AppWidgetProvider {
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) {
Intent intent = new Intent(context, DfdWidgetService.class);
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.dfd_widget);
remoteViews.setRemoteAdapter(R.id.widgetRemindersListView, intent);
remoteViews.setEmptyView(R.id.widgetRemindersListView, R.id.widgetEmptyViewText);
// Instruct the widget manager to update the widget
appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// There may be multiple widgets active, so update all of them
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
@Override
public void onEnabled(Context context) {
super.onEnabled(context);
}
@Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
}
@Override
public void onRestored(Context context, int[] oldWidgetIds, int[] newWidgetIds) {
super.onRestored(context, oldWidgetIds, newWidgetIds);
}
}
public class DfdWidgetService extends RemoteViewsService {
@Override
public RemoteViewsFactory onGetViewFactory(Intent intent) {
return new DfdRemoteViewsFactory(getApplicationContext());
}
class DfdRemoteViewsFactory implements RemoteViewsService.RemoteViewsFactory {
private final Context context;
private ReminderRepository reminderRepository;
private List<Reminder> reminders;
public DfdRemoteViewsFactory(Context context) {
this.context = context;
this.reminderRepository = ReminderRepository.getReminderRepository(context);
}
@Override
public void onCreate() {
reminders = reminderRepository.getAllRemindersForTodayList();
}
@Override
public void onDataSetChanged() {
reminders = reminderRepository.getAllRemindersForTodayList();
}
@Override
public void onDestroy() {
reminders.clear();
}
@Override
public int getCount() {
return reminders.size();
}
@Override
public RemoteViews getViewAt(int position) {
Reminder reminder = reminders.get(position);
RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.id.widgetListItem);
remoteView.setTextViewText(R.id.widgetReminderName, reminder.getName());
// Removed code that sets the other fields as I tried it with and without and it didn't matter. So removed for brevity
return remoteView;
}
@Override
public RemoteViews getLoadingView() {
return null;
}
@Override
public int getViewTypeCount() {
return 1;
}
@Override
public long getItemId(int position) {
return reminders.get(position).getId();
}
@Override
public boolean hasStableIds() {
return true;
}
}
}
RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.id.widgetListItem)