重复问题 enter link description here
即使我面临同样的问题，所以我在应用程序小部件上单击 ImageView ，应用程序小部件 ListView 应该更新，在我的代码中，当我在 onreceive 方法中调用更新 ListView 时 action=UPDATE_ACTION ，它调用更新小部件的 updateWidgetListView 方法，但在我的情况下它没有更新 ListView ，如果我出错了请建议
这是我的代码
package com.wordpress.laaptu;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.util.Log;
import android.view.View;
import android.widget.RemoteViews;
public class WidgetProvider extends AppWidgetProvider {
// String to be sent on Broadcast as soon as Data is Fetched
// should be included on WidgetProvider manifest intent action
// to be recognized by this WidgetProvider to receive broadcast
public static final String DATA_FETCHED = "com.wordpress.laaptu.DATA_FETCHED";
public static String MANIFEST_DEFINED_STRING = "com.refresh.widget";
final static String WIDGET_UPDATE_ACTION ="UPDATE_WIDGET";
AppWidgetManager appWidgetManager;
ComponentName currentWidget;
/*
* this method is called every 30 mins as specified on widgetinfo.xml this
* method is also called on every phone reboot from this method nothing is
* updated right now but instead RetmoteFetchService class is called this
* service will fetch data,and send broadcast to WidgetProvider this
* broadcast will be received by WidgetProvider onReceive which in turn
* updates the widget
*/
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
final int N = appWidgetIds.length;
Log.i("inside", "WidgetProvider");
/*
* RemoteViews viewClick = new
* RemoteViews(context.getPackageName(),R.layout.widget_layout);
*
* Intent informationIntent = new Intent(context,info.class);
* PendingIntent infoPendingIntent =
* PendingIntent.getActivity(context,0, informationIntent, 0); //
* viewClick.setOnClickPendingIntent(R.id.txtSeeMore,infoPendingIntent);
*
* viewClick.setOnClickPendingIntent(R.id.txtSeeMore,
* PendingIntent.getBroadcast(context, 0, new Intent(context,
* info.class) .setAction("android.intent.category.INFO"),
* PendingIntent.FLAG_UPDATE_CURRENT));
*/
for (int i = 0; i < N; i++) {
Log.i("appWidgetIds", Integer.toString(appWidgetIds[i]));
Intent serviceIntent = new Intent(context, RemoteFetchService.class);
serviceIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
appWidgetIds[i]);
context.startService(serviceIntent);
}
/*
* this.appWidgetManager = appWidgetManager; //this is a onclick event
* while no internet connection, currentWidget = new
* ComponentName(context, WidgetProvider.class); RemoteViews
* defaultRemoteView = new RemoteViews( context.getPackageName(),
* R.layout.widget_layout); Intent informationIntent = new
* Intent(context, MainActivity.class); PendingIntent infoPendingIntent
* = PendingIntent.getActivity(context, 0, informationIntent, 0);
* defaultRemoteView.setOnClickPendingIntent(R.id.img_SeeMore,
* infoPendingIntent); appWidgetManager.updateAppWidget(currentWidget,
* defaultRemoteView);
* defaultRemoteView.setEmptyView(R.id.listViewWidget, R.id.empty_view);
*/
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
private RemoteViews updateWidgetListView(Context context, int appWidgetId) {
Log.i("inside", "updateWidgetListView");
Log.i("appWidgetIds", Integer.toString(appWidgetId));
// which layout to show on widget
RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
R.layout.widget_layout);
final Intent refreshIntent = new Intent(context, WidgetProvider.class);
refreshIntent
.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
refreshIntent.setAction(WidgetProvider.MANIFEST_DEFINED_STRING);
/*
* final PendingIntent refreshPendingIntent =
* PendingIntent.getBroadcast( context, appWidgetId, refreshIntent,
* PendingIntent.FLAG_UPDATE_CURRENT);
* remoteViews.setOnClickPendingIntent(R.id.img_SeeMore,
* refreshPendingIntent);
*/
// RemoteViews Service needed to provide adapter for ListView
Intent svcIntent = new Intent(context, WidgetService.class);
// passing app widget id to that RemoteViews Service
svcIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
// setting a unique Uri to the intent
// don't know its purpose to me right now
svcIntent.setData(Uri.parse(svcIntent.toUri(Intent.URI_INTENT_SCHEME)));
// setting adapter to listview of the widget
remoteViews.setRemoteAdapter(appWidgetId, R.id.listViewWidget,
svcIntent);
// setting an empty view in case of no data
remoteViews.setEmptyView(R.id.listViewWidget, R.id.empty_view);
return remoteViews;
}
/*
* It receives the broadcast as per the action set on intent filters on
* Manifest.xml once data is fetched from RemotePostService,it sends
* broadcast and WidgetProvider notifies to change the data the data change
* right now happens on ListProvider as it takes RemoteFetchService
* listItemList as data
*/
@Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
Log.i("inside", "onReceive");
Log.i("getaction", intent.getAction());
if (intent.getAction().equals(DATA_FETCHED)) {
Log.i("inside action", "DATA_FETCHED");
int appWidgetId = intent.getIntExtra(
AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID);
Log.i("appWidgetIds", Integer.toString(appWidgetId));
AppWidgetManager appWidgetManager = AppWidgetManager
.getInstance(context);
RemoteViews remoteViews = updateWidgetListView(context, appWidgetId);
Intent informationIntent = new Intent(context, MainActivity.class);
PendingIntent infoPendingIntent = PendingIntent.getActivity(
context, 0, informationIntent, 0);
remoteViews.setOnClickPendingIntent(R.id.img_SeeMore,
infoPendingIntent);
Intent widgetIntent = new Intent(context, WidgetProvider.class);
widgetIntent.setAction(WIDGET_UPDATE_ACTION);
widgetIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
//PendingIntent widgetPendingIntent = PendingIntent.getBroadcast(context, 0, widgetIntent, 0);
PendingIntent widgetPendingIntent = PendingIntent.getBroadcast(context, appWidgetId, widgetIntent, 0);
remoteViews.setOnClickPendingIntent(R.id.img_refresh,widgetPendingIntent);
// remoteViews.setViewVisibility(R.id.txtSeeMore, View.VISIBLE);
/*
* RemoteViews newView = new RemoteViews(context.getPackageName(),
* R.layout.seemore); newView.setTextViewText(R.id.txt_extra,
* "1234"); remoteViews.addView(R.id.lay_title, newView);
*/
appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
}
// this is on clickclick event of view more when internet connection is
// there
// & service running
else if (MANIFEST_DEFINED_STRING.equals(intent.getAction())) {
Log.i("inside action", "MANIFEST_DEFINED_STRING");
Intent settingIntent = new Intent(context, MainActivity.class);
settingIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(settingIntent);
}
else if (WIDGET_UPDATE_ACTION.equals(intent.getAction())) {
Log.i("inside action", "WIDGET_UPDATE_ACTION");
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context.getApplicationContext());
int[] appWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(context.getApplicationContext(), WidgetProvider.class));
for (int i = 0; i < appWidgetIds.length; i++)
{
Log.i("appWidgetIds", Integer.toString(appWidgetIds[i]));
Intent serviceIntent = new Intent(context, RemoteFetchService.class);
serviceIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
appWidgetIds[i]);
context.startService(serviceIntent);
}
//onUpdate(context,appWidgetManager,appWidgetIds);
}
}
/*public static PendingIntent refreshWidget(Context context) {
// initiate widget update request
Intent intent = new Intent();
intent.setAction(WIDGET_UPDATE_ACTION);
return PendingIntent.getBroadcast(context, 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
}*/
}
这是我运行代码时的 logcat
12-12 14:13:53.221: I/inside(5904): WidgetProvider
12-12 14:13:53.221: I/appWidgetIds(5904): 107
12-12 14:13:53.301: I/inside(5904): onReceive
12-12 14:13:53.301: I/getaction(5904): android.appwidget.action.APPWIDGET_UPDATE
12-12 14:13:53.441: I/widgetFor(5904): timeline
12-12 14:13:53.606: W/IInputConnectionWrapper(5904): showStatusIcon on inactive InputConnection
12-12 14:14:05.976: I/inside(5904): RemoteFetchService
12-12 14:14:06.106: I/calling(5904): populateWidget
12-12 14:14:06.106: I/inside(5904): populateWidget
12-12 14:14:06.131: I/inside(5904): onReceive
12-12 14:14:06.131: I/getaction(5904): com.wordpress.laaptu.DATA_FETCHED
12-12 14:14:06.131: I/inside action(5904): DATA_FETCHED
12-12 14:14:06.131: I/appWidgetIds(5904): 107
12-12 14:14:06.131: I/inside(5904): updateWidgetListView
这是当我点击 appwidget 的 ImageView 更新 ListView 时的 logcat 输出
> 12-12 14:31:59.441: I/inside(11237): onReceive 12-12 14:31:59.441:
> I/inside action(11237): WIDGET_UPDATE_ACTION 12-12 14:31:59.441:
> I/appWidgetIds(11237): 107 12-12 14:31:59.461: I/widgetFor(11237):
> timeline 12-12 14:31:59.791: I/inside(11237): RemoteFetchService 12-12
> 14:31:59.816: I/calling(11237): populateWidget 12-12 14:31:59.816:
> I/inside(11237): populateWidget 12-12 14:31:59.841: I/inside(11237):
> onReceive 12-12 14:31:59.841: I/getaction(11237):
> com.wordpress.laaptu.DATA_FETCHED 12-12 14:31:59.841: I/inside
> action(11237): DATA_FETCHED 12-12 14:31:59.841: I/appWidgetIds(11237):
> 107 12-12 14:31:59.841: I/inside(11237): updateWidgetListView 12-12
> 14:31:59.841: I/appWidgetIds(11237): 107
所以请帮忙解决这个问题，谢谢..
最佳答案
终于解决了 因为 RemoteViewsFactory 缓存它为每个小部件 ID 创建的工厂。因此，当同一个小部件发送创建新工厂的请求(通过您的小部件适配器服务)时，将返回同一个工厂。因此， ListView 没有“更新”。
所以我尝试了 (updateWidgetListView())
svcIntent.setData(Uri.fromParts("content",
String.valueOf(appWidgetId + randomNumber), null));
& onGetViewFactory()
int appWidgetId = Integer.valueOf(intent.getData().getSchemeSpecificPart()) - WidgetProvider.randomNumber;
关于android - android中的appwidget listview更新问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20539167/