Java tutorial
//package com.java2s; import android.appwidget.AppWidgetManager; import android.appwidget.AppWidgetProviderInfo; import android.content.Context; import android.os.Build; public class Main { public static final boolean isKeyguardWidget(int appWidgetId, Context context) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context.getApplicationContext()); return appWidgetManager.getAppWidgetOptions(appWidgetId).getInt( AppWidgetManager.OPTION_APPWIDGET_HOST_CATEGORY, -1) == AppWidgetProviderInfo.WIDGET_CATEGORY_KEYGUARD; } return false; } }