android - Error:Connection timed out: connect -

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i changed version of gradle of android studio 1.5.1 1.5 2.10 , clicked sync now, (error image) follow error ocurred :

error:connection timed out: connect. if behind http proxy, please configure proxy settings either in ide or gradle.

go gradle.properties file in gradle scripts , add :

systemprop.http.proxyhost=127.0.0.1

systemprop.http.proxyport=3128 // enter proxy port

systemprop.https.proxyhost=127.0.0.1

systemprop.https.proxyport=3128 // enter proxy port. can find proxy port going internet option-> connections -> lan settings -> advanced -> port


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