ClassNotFoundException com.google.android.gms.drive.DriveSpace

Question

它在测试设备上正常工作。但是随着“ Generate Signed APK”的生成和运行，ClassNotFoundException： 发生com.google.android.gms.drive.DriveSpace错误。关于解决方案感谢您的建议。谢谢。

    count = recv(s, buf, sizeof buf, 0);
    for(int i=0; i<chunk; i++)
    {
        if(buf[i]=='<')
          if(buf[i+1]=='p')
                if(buf[i+2]=='>')
                pcount++;>*/
    }

...

implementation 'com.google.android.gms:play-services-auth:16.0.1'
implementation 'com.google.android.gms:play-services-drive:16.0.0'