How to remove polylines in Google Maps Android API v2? -

so have 2 markers: 1 destination (which static meaning not move) , other marker dynamic , updates position based on current location.

i able draw polyline on route between 2 markers. problem when updating current location, previous polyline drawn previous position of dynamic marker still there.

here image:

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as can see in image, marker dynamic 1 points current location , polyline marker's previous position located @ university of san carlos @ upper-right position of marker in image. destination marker not shown in image.

how remove previous polyline? tried using method remove() polyline class didn't work.

i based code link: answer : draw path between 2 points using google maps android api v2

create array markers/points , polylines. later, on remove, make this:

polyline ptemp = mpolylines.remove(mpolylines.size() - 1); ptemp.remove()