我正在尝试创建一个包含元素(任务)列表的 android 小部件。
当我将小部件放在主屏幕上时,它是空的,没有显示任何任务。
我不明白缺少什么。
在此先感谢您的帮助。
这是我的 widget_layout.xml 的 xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/widget_background"
android:orientation="vertical" >
<TextView
android:id="@+id/title"
style="@android:style/TextAppearance.Medium"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="4dip"
android:gravity="center_horizontal"
android:text="@+string/TASK_LIST_ACT" >
</TextView>
<ListView
android:id="@+id/list"
style="@android:style/TextAppearance.Medium"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
这是 ListView 项目的布局
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/widget_element"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?android:attr/listPreferredItemHeight" />
这是我的 widgetProvider 类
package it.geotask.android.widget;
import it.geotask.android.R;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.widget.RemoteViews;
public class TaskWidgetProvider extends AppWidgetProvider {
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
super.onUpdate(context, appWidgetManager, appWidgetIds);
for (int i = 0; i < appWidgetIds.length; ++i) {
Intent intent = new Intent(context, GeotaskRemoteViewService.class);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
appWidgetIds[i]);
intent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME)));
RemoteViews rv = new RemoteViews(context.getPackageName(),
R.layout.widget_layout);
rv.setRemoteAdapter(appWidgetIds[i], R.id.list, intent);
rv.setEmptyView(R.id.list, R.id.empty_view);
appWidgetManager.updateAppWidget(appWidgetIds[i], rv);
}
}
}
这是我的 RemoteViewsFactory
package it.geotask.android.widget;
import it.geotask.android.R;
import it.geotask.android.dto.Task;
import it.geotask.android.service.TaskService;
import java.util.ArrayList;
import java.util.List;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;
import android.widget.RemoteViewsService;
public class GeoTaskRemoteViewsFactory implements
RemoteViewsService.RemoteViewsFactory {
private Context context = null;
private int appWidgetId;
private List<Task> taskList = new ArrayList<Task>();
public GeoTaskRemoteViewsFactory(Context context, Intent intent) {
this.context = context;
appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID);
}
public int getCount() {
return taskList.size();
}
public long getItemId(int position) {
return taskList.get(position).getId();
}
public RemoteViews getLoadingView() {
// TODO Auto-generated method stub
return null;
}
public RemoteViews getViewAt(int position) {
RemoteViews row = new RemoteViews(context.getPackageName(),
R.layout.row);
row.setTextViewText(android.R.id.text1, taskList.get(position)
.getName());
return (row);
}
public int getViewTypeCount() {
// TODO Auto-generated method stub
return 0;
}
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
public void onCreate() {
taskList = TaskService.getTaskInStateList(context, context
.getResources().getString(R.string.DB_STATE_ACTIVE));
taskList.addAll(TaskService.getTaskInStateList(context, context
.getResources().getString(R.string.DB_STATE_IN_RANGE)));
taskList.addAll(TaskService.getTaskInStateList(context, context
.getResources().getString(R.string.DB_STATE_DELAYED)));
}
public void onDataSetChanged() {
// TODO Auto-generated method stub
}
public void onDestroy() {
// TODO Auto-generated method stub
}
}
remoteViewsService 只是返回工厂的一个实例。
编辑: 我忘了在清单中声明服务;现在我得到了填充了正确数量的项目的小部件,但是消息“正在加载”而不是我要显示的项目的名称