我一直在研究一个小部件并取得了一些进展(我希望)，但仍然无法让它做我想做的事。

我有一个运行正常的配置器 Activity 。当它关闭时，我调用 WordWidget 类中的 updateAppWidget 方法，小部件更新随机数。

我无法做到的是，由于 onClick 而使随机数发生变化。根据日志，我确实进入了 onReceive() 方法，但仅此而已。

在日志中，我正在打印小部件 ID。我注意到当从配置器 Activity 运行时它打印 appWidgetId=33，但是当我按下小部件时它打印 appWidgetId=24。

这是代码:

public class WordWidget extends AppWidgetProvider
{

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
    {
        //This is run when a new widget is added or when the update period expires.
        Log.v("wotd",  "In onUpdate(), updating " + appWidgetIds.length + " widgets");
        Log.v("wotd",  "   the array is " + appWidgetIds.toString());

        for(int x = 0; x < appWidgetIds.length; x++)
        {
            Integer appWidgetId = appWidgetIds[x];


            //Method that updates the random value
            updateAppWidget(context, appWidgetManager, appWidgetId);
        }
    }

    @Override
    public void onReceive(Context context, Intent intent)
    {
        super.onReceive(context, intent);
        Log.v("wotd", "In onReceive() with intent=" + intent.toString());
        if (intent.getAction().equals("android.appwidget.action.APPWIDGET_UPDATE"))
        {
            Integer mAppWidgetId;
            AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);

            Bundle extras = intent.getExtras();
            if(extras != null)
            {
                Log.v("wotd", "In onReceive(), extras is valid");
                mAppWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);

                //If they gave us an intent without a valid widget Id, just bail.
                if (mAppWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID)
                {
                    Log.v("wotd", "In onReceive(), mAppWidgetId is ok");
                    updateAppWidget(context, appWidgetManager, mAppWidgetId);
                }
            } else
            {
                Log.v("wotd", "In onReceive(), extras is INVALID");
                mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
            }
        }


    }


    static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, Integer appWidgetId)
    {
        Log.v("wotd", "In updateAppWidget() with appWidgetId=" + appWidgetId);

        //Setup onClick
        Intent widgetIntent = new Intent(context, WordWidget.class);
        widgetIntent.setAction("android.appwidget.action.APPWIDGET_UPDATE");
        widgetIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
        PendingIntent widgetPendingIntent = PendingIntent.getBroadcast(context, 0, widgetIntent, 0);

        Integer nextNumb = new Random().nextInt(100);
        Log.v("wotd", "In updateAppWidget(), nextNumb = " + nextNumb.toString());

        RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.layout.widgetlayout);
        remoteView.setTextViewText(R.id.mainText, String.valueOf(nextNumb));
        remoteView.setOnClickPendingIntent(R.id.mainText, widgetPendingIntent);

        // Tell the widget manager
        appWidgetManager.updateAppWidget(appWidgetId, remoteView);
    }
}

这是我触摸小部件时的日志文件(请注意，prefs Activity 也有一个日志打印输出，并将小部件 ID 显示为与此不同的数字):

05-14 17:15:47.453: V/wotd(1585): In onReceive() with intent=Intent { act=android.appwidget.action.APPWIDGET_UPDATE flg=0x10000000 cmp=com.rfxlabs.wordofthedaywidget/.WordWidget bnds=[202,177][222,201] (has extras) }
05-14 17:15:47.453: V/wotd(1585): In onReceive(), extras is valid
05-14 17:15:47.463: V/wotd(1585): In onReceive(), mAppWidgetId is ok
05-14 17:15:47.463: V/wotd(1585): In updateAppWidget() with appWidgetId=24

05-14 17:15:47.463: V/wotd(1585): 在 updateAppWidget() 中，nextNumb = 42

如您所见，我实际上正在输入我的 updateAppWidget 方法，但由于某种原因，appWidgetId 不正确。

知道为什么会这样吗？非常感谢!

最佳答案

在您的函数 updateAppWidget 中转到这一行:

PendingIntent widgetPendingIntent = PendingIntent.getBroadcast(context, 0, widgetIntent, 0);

...并将其更改为:

PendingIntent widgetPendingIntent = PendingIntent.getBroadcast(context, appWidgetId, widgetIntent, 0);

关于Android 小部件未更新 - 小部件 ID 不正确，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10588080/