android - When can I use GoogleMap.getProjection().getVisibleRegion()? -

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i have googlemap.getprojection().getvisibleregion().latlngbounds

but when app started, values zero.

i tried @ onviewcreated, onactivitycreated , onstart of supportmapfragment, doesn't work. when can it? there callback function notifies when ready?any appreciated.

you can add oncamerachangelistener map.


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