appWidget点击发起程序问题

以前使用一直没问题 今天使用竟然来了问题

public class VolumeChangerWidget extends AppWidgetProvider { public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds){         final int N = appWidgetIds.length;         for (int i=0; i < N; i++) {                 int appWidgetId = appWidgetIds[i];                 Log.d("Steve", "Running for appWidgetId " + appWidgetId);                 Toast.makeText(context, "Hello from onUpdate", Toast.LENGTH_SHORT);                 Log.d("Steve", "After the toast line");                 Intent intent = new Intent(context, WidgetTest.class);                 PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);                 RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);                 views.setOnClickPendingIntent(R.id.button, pendingIntent);                 appWidgetManager.updateAppWidget(appWidgetId, views);         } }

错误的地方在于 不能引用自带的参数

 AppWidgetManager mgr = AppWidgetManager.getInstance(context);     mgr.updateAppWidget(comp, views); 

这是主要原因了。当然你也可以在不同的地方使用

onEnabled and onUpdated

 

@Override     public void onEnabled(Context context) {                       AppWidgetManager mgr = AppWidgetManager.getInstance(context);           //retrieve a ref to the manager so we can pass a view update            Intent i = new Intent();           i.setClassName("yourdoman.yourpackage", "yourdomain.yourpackage.yourclass");           PendingIntent myPI = PendingIntent.getService(context, 0, i, 0);           //intent to start service          // Get the layout for the App Widget          RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.togglelayout);         //attach the click listener for the service start command intent          views.setOnClickPendingIntent(R.id.toggleButton, myPI);         //define the componenet for self          ComponentName comp = new ComponentName(context.getPackageName(), ToggleWidget.class.getName());         //tell the manager to update all instances of the toggle widget with the click listener          mgr.updateAppWidget(comp, views); }