I use searchlight flashlight, works nice and has a built in widget as well.
https://play.google.com/store/apps/details?id=com.northcoastmedia.android.searchlight&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5ub3J0aGNvYXN0bWVkaWEuYW5kcm9pZC5zZWFyY2hsaWdodCJd