Wrote a calculator page, no runtime without error, after the operation simulator app tip has stopped running, there are two lines on logcat red characters below, please answer

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Check and network setup and related code

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Logcat turn to specific error prompt, generally there is the place of the blue words

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Error log should be incorrect, the correct access log see novice blog's common problem 1 https://blog.csdn.net/weimingjue/article/details/87921494