从widget类调用另一个类的方法

Question

public class MainActivity extends AppWidgetProvider{
public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {
    for(int i=0; i<appWidgetIds.length; i++){
        int appWidgetId = appWidgetIds[i];

        Intent intent = new Intent(context, MyLockScreenActivity.class);
        PendingIntent pending = PendingIntent.getActivity(context, 0,intent, 0);
        Log.e("in main","onclick");
        RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.activity_main);

        views.setOnClickPendingIntent(R.id.button, pending);
        appWidgetManager.updateAppWidget(appWidgetId,views);
        Toast.makeText(context, "widget added", Toast.LENGTH_SHORT).show();
    }
}
}

这是我的小部件代码。而不是调用另一个活动，我想从普通的java类调用方法。