connect printer to android

public static final String Base_url = "http://127.0.0.1:8090/HelloWord/" ...;Will throw an exception caused By:libcore.io.ErrnoException:connect failed:econnrefused (Connection refused)Workaround:String url = "http://127.0.0.1£ 8090/helloword/" ...; Modified intopublic static final String Base_url = "//192.168.3.14: 8090/helloword" ...;Host IP cannot use localhost or 127.0.0.1, using a real IP address.An error occurred when the Android client connecte

= Helper.getreadabledatabase ();cursor cursor = db.rawquery ("Select *from person", NULL);arraylistwhile (Cursor.movetonext ()){int id = cursor.getint (cursor.getcolumnindex ("id"));String name = cursor.getstring (Cursor.getcolumnindex ("name"));String number = cursor. GetString (Cursor.getcolumnindex ("number"));person person = new person (ID, name, number);List.add (person);}return list;}}ThingsOpen ThingsDb.begintransaction ();Try{Mark Things executed successfullyDb.settransactionsuccessful

1, we in the Android phone's desktop click on the set to enter after we then, click Wi-Fi, the following figure: 2, click to add WLAN network , (because the search is not so only click to add a network): 3, manually enter the router's SSID, wireless password and other parameters, click on storage , save the wireless profile, the following figure: 4, wireless profile to add complete, wireless signal display is connected, the foll

Execute command in terminal: LSUSB Bus 002 Device 002:id 8087:0024 Intel Corp Integrated rate Matching HubBus 002 Device 001:id 1d6b:0002 Linux Foundation 2.0 root HubBus 001 Device 004:id 5986:0397 Acer, Inc.Bus 001 Device 003:id 105b:e065Bus 001 Device 002:id 8087:0024 Intel Corp Integrated rate Matching HubBus 001 Device 001:id 1d6b:0002 Linux Foundation 2.0 root HubBus 004 Device 001:id 1d6b:0003 Linux Foundation 3.0 root HubBus 003 Device 002:id 17ef:604d LenovoBus 003 Device 005:id 04e8:68

Android infers whether to connect WiFi and network status inference

When this problem arises, online solutions are identical!I'm going to give you an address first. Solution http://blog.csdn.net/qq_25827845/article/details/52974991But I stepped on the pit is my computer even WiFi and test the real machine is the same address! But when I set the server address on the real machine, my IP address was set toActually my real IP address isSo he kept suggesting that I couldn't find the service!!!!!About react native when running An