android - java.net.ConnectException: Connection refused: connect Error while Installing APK -

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i got error in android while running. 

java.net.connectexception: connection refused: connect error while installing apk.

please 1 me happen , how fix.

the error show in log is.

connection attempts: 1 09:43:16 'c:\users\android\sdk\platform-tools\adb.exe,start-server' failed -- run manually if necessary

the error show in run console

java.net.connectexception: connection refused: connect error while installing apk

kill adb.exe process,and restart androidstudio


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