android - getLastLocation does not work on second time -


i'm using google play services user's last known connection.

@override public void onconnected(bundle connectionhint) {     final location lastlocation = locationservices.fusedlocationapi.getlastlocation(                 _googleapiclient); }   @override     protected void onresume() {         super.onresume();          connecttogoogleplay();        }  @override     protected void onpause() {         super.onpause();         if (_googleapiclient != null) {             _googleapiclient.disconnect();         }     }

works expected.

the problem occurs whenever i'm clicking on button , starting application again. app crashes because getlastlocation return null. formal documentation states -

if location not available, should happen rarely, null returned.

fine, know sure location exists, retrieved second ago.

i did quick experiment , removed _googleapiclient.disconnect(); , works, somehow disconnect erases last location

why ? missing ?

a few things consider:

1) should connect googleapiclient in onstart() , disconnect in onstop(): 

@override protected void onstart() {     super.onstart();     mgoogleapiclient.connect(); }  @override protected void onstop() {     mgoogleapiclient.disconnect();     super.onstop(); }

2) code should assume getlastlocation() may return null. null check.

3) use islocationavailable() when working getlastlocation(). if returns true, location returned getlastlocation() can assumed reasonably date.


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