Java.Net.Connectexception: Localhost/127.0.0.1:8080 - Connection Refused

java.net.ConnectException: localhost/127.0.0.1:8080 - Connection refused

Since you have not specified you are connected to a server from the device or emulator so I guess you are using your application in the emulator.

If you are referring your localhost on your system from the Android emulator then you have to use http://10.0.2.2:8080/ Because Android emulator runs in a Virtual Machine therefore here 127.0.0.1 or localhost will be emulator's own loopback address.

Refer: Emulator Networking

java.net.ConnectException: fail to connect to localhost/127.0.0.1(port 8080): connect failed:ECONNREFUSED….(Codename One App)

It looks like you're trying to connect to localhost in your URL.

This probably works fine using the simulator, but you'll need to use an IP address or better yet a resolvable host name in your URL when you run the app in production.

Try changing your URL in this way. You can test for connectivity by using your phone's web browser, for example enter a URL (not using localhost!) of your web service in the browser and see what happens.

How to solve the error `java.net.ConnectException: Failed to connect to localhost/127.0.0.1:8000`

Try open cmd and then write ipconfig on it
after that you got your local ip address then try to put on your code

for example you got 192.168.1.2 from your cmd then put it to your code like this:

HitAPITask().execute("http://192.168.1.2/api/name/")

java.net.ConnectException: Failed to connect to /localhost:8080

The JS (NPM) HTTP Server doesn't execute PHP scripts. You'd have to setup the infamous WAMP stack so that the PHP script is executed when you call it via URL.

Setting Up Apache/MySQL/PHP (AMP) on Linux (LAMP), Windows (WAMP) and Mac OS (MAMP)

On a side note, you can also use ADB Reverse to forward a port from your device to your laptop.

how to use localhost in conjunction with retrofit for testing of android apps kotlin

Is your server running on the same device as your Android app? Only then you can use localhost/127.0.0.1.

java.net.ConnectException: Connection refused

This exception means that there is no service listening on the IP/port you are trying to connect to:

• You are trying to connect to the wrong IP/Host or port.
• You have not started your server.
• Your server is not listening for connections.
• On Windows servers, the listen backlog queue is full.

Caused by: java.net.ConnectException: Connection refused: no further information: localhost/127.0.0.1:9300

It is pretty clear that you have missed some or all of the steps in section 5.1 of the example that you are following. The last of them says that you must start the ElasticSearch instance. The evidence is that you haven't done this (successfully). The instance would be listing for connections on port 9300, It isn't, and that causes the OS to "refuse" the connection attempt by your client.

Prerequisite means that you must do them first.

Solution: follow the instructions.

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