Linestring maps function

[SteveJG]

Welcome Hang

@Hang_Huan_L_AP025146

two markers on a map and I want the linestring to draw path from one marker to the other whenever i am displaying a route on the map

Is this what you hope to do?

Perhaps you would use Navigate component.

HOW TO: Use the Navigate control

Simple Navigate by SteveJG [NavigateRose2] This tutorial is an example of one way to use the Navigate tool to build a Simple Navigate app. The instructions are intended for intermediate or advanced users of App Inventor 2. There are no detailed instructions. Provide similar code in your app. The Blocks are the documentation. Navigate Control The Navigate control provides ‘turn by turn’ directions used to get between two locations. The routing output is similar to directions provided by the G…

Essentially you need a Map component, two Markers, the Navigate component and a LineString.