Usar la aplicación APKPure
Obtener Touch Lock versión histórica en Android
Bloqueo táctil deja de contacto no intencional en la pantalla y bloquea la entrada táctil
Touch Lock stops unintentional touch on screen and it blocks touch input. It can disable the touch while watching youtube or movies. Also useful if you hand your phone to someone and don't want them to use your phone. It can useful to avoid accidental touch while calling in progress
Note :By Default MI does not support this feature. You need to enable it in settings. Please follow instruction in below link. http://www.gizchina.com/2014/09/09/fix-facebook-messenger-chat-heads-showing-miui-6/