Connecting android to localhost

Connecting Android Apps to localhost, Simplified

P.S. if you’re in a hurry, find the correct solution here

I was working on a full stack side project a few months ago, and I wanted to make API requests from my android app to my desktop, and for some reason localhost:8000 wasn’t simply accessible by my phone.

Well, understandable, I know that every device’s localhost is independent and cannot be accessed by your home network (your Wi-Fi, for example). So the localhost on my laptop won’t be able to access the localhost on my phone.

So, I asked Google for help. And I got a large number of solutions, the most sensible one being «use the internal IP address of your PC», et voilà.

The Bad way

Use ipconfig if you’re on windows

Running ip addr on my machine tells me that the laptop’s internal IP is 192.168.29.76 .

And sure enough, as long as both devices were using the same Wi-Fi network, accessing http://192.168.29.76:8000 instead of http://localhost:8000 did work. My Android app can now make web requests to my local backend server 🎉

But this solution is. a bit unstable.

The internal IP of your laptop can keep changing whenever it connects to Wi-Fi, depending on various factors. And everytime it changes, you have to change the URL in your app’s code, which is not ideal.

There’s other ways as well like using ngrok, but it faces similar issues.

The Correct, easy way

use adb reverse .

Connect your android device to your pc via USB, ensure you have adb setup, and run this in your terminal:

Exit fullscreen mode

Now, your mobile can access localhost:8000 , just like your PC. (you can replace 8000 with whichever port you want to forward)

Why did nobody tell me this?

Yeah, I was also surprised when I was unable to find anyone on Google or StackOverflow mentioning the existence of adb reverse when I tried to look for it.

Which is why I wrote this blog. Now hopefully, adb reverse will become more popular.

If you know why adb reverse isn’t as popular, let me know. Also, if you know another android developer that should know about this little productivity hack, why not share this blog with them? 😛

Cover image courtesy of Fotis Fotopoulos on Unsplash

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Подключение Android к localhost

Я пытаюсь подключить свое приложение android к локальному url-адресу хоста благодаря WAMP server, но это не работает. Моя цель здесь-получить данные json и проанализировать эти данные. Для моего теста, я использую устройство, а не эмулятор и я использую разрешение в AndroidManifest.XML-код :

мой url выглядит так:

но это никогда не работало до сих пор:

затем я попытался с тестом url JSON, найденным на интернет : http://headers.jsontest.com/

это сработало очень хорошо, и я получил данные json по этому адресу. Поэтому я думаю, что мой код хорош, и проблема здесь — мой url localhost, я не знаю, какой должна быть его точная форма.. Я прочитал много тем об этом, но я не нашел решения.

7 ответов

сначала вам нужно привязать IP-адрес машины, на которой работает ваш сервер, в настройках eclipse.

вы можете сделать это, как это.

щелкните правой кнопкой мыши PHP проект в eclipse затем запустите конфигурацию, затем в Web Application где вы найдете Argument tab. Теперь здесь укажите порт и IP-адрес вашей машины, на которой работает ваш сервер.

что-то вроде этого —port=8888 —адрес=192.168.1.6 затем обновите URL до http://192.168.1.6:8080/tests/PhpProject1/connectionBDD.php

здесь, в моем случае, это мой IP-адрес LAN 192.168.1.6, там вам придется найти его с помощью сетевой команды, такой как ipconfig , ifconfig и используйте этот IP-адрес.

IP-адрес 10.0.2.2 используется для извлечения данных из эмулятора. Localhost всегда будет указывать на устройство эмулятора / android, на котором запущено приложение. Чтобы ваше устройство могло получать данные с вашего ПК, оно должно быть в той же сети (подключено WiFi к маршрутизатору), и вы должны использовать локальный IP-адрес вашего ПК (обычно 192.168.1.X-число).

Если вы попытаетесь подключиться к» localhost», он разрешится на Android-устройстве, а не на вашем собственном localhost (если вы не работаете в эмуляторе). Что я рекомендую для разработки, так это добавить меню переполнения в панель действий с записью «настройки», которая предоставляет действие» настройки «для задания параметров приложения, и запись» Параметры разработчика » в «настройки», которая позволяет указать пользовательский адрес сервера для использования. Во время разработки, вы можете использовать эту опцию для введите адрес сервера для вашего приложения. (Вам понадобится реальный адрес сервера, который фактически доступен через Интернет, а не с помощью localhost для этого).

Я предполагаю, что вы пытаетесь получить доступ к веб-службе, доступной на вашем ПК с помощью симулятора android или реального устройства.

для эмулятора android, вы должны не просто используйте «localhost», потому что «localhost» означает сам эмулятор android,не хост-ПК.

вам нужно изменить файл/etc / hosts или симулятор или реальное устройство. добавьте строку типа » 192.168.0.100 service.местный.»

Если вы используете свой телефон вместо эмулятора и запускаете службы на localhost, то в url вместо «10.0.2.2» используйте IP-адрес вашего ПК.

один простой способ, который я знаю, это сохранить мобильные данные и поделиться wifi . Подключите ноутбук или компьютер к этому wifi . Теперь см. ip ноутбука или рабочего стола ur. Вызов службы с телефона ur . Поскольку ваш телефон и компьютер находятся в одной сети.

пробовал » 10.0.2.2: 80 / mysitename / page.на PHP» Чудо случилось, теперь работает. Я на Mac и использую XAMPP для сервера.

вы можете изменить порт нет. до 80 и попробовать. порт 8080 не работал на меня!

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Connect Android App to Localhost Web Server Over Wi-Fi

DISCLOSURE: This article may contain affiliate links and any sales made through such links will reward us a small commission, at no extra cost for you. Read more about Affiliate Disclosure here.

Connect android app to localhost over Wi-Fi and it gives a lot of flexibility to develop, run and test the app. My scenario was that I had created an android app which had a need to access my local web server (XAMPP) for faster testing and the application was running on the device as well as an emulator.

You might be using either PHP + MySQL or C# + MSSQL on Apache/IIS Server respectively. And you need to code and test your app before moving them to production. You can access or connect the android app to the local web server over Wi-Fi, without the need of internet connection. It saves you from waiting for the response from a remote host or your live server.

Check some excellent articles for easier PHP development.

Connect Android App – is Local Server ready?

I believe that you have already set up your localhost and files to serve the request being received from the device. Ensure that your local server is accessible (type http://localhost/ in your PC’s browser and get a response).

Just FYI, the article is intended to answer the following similar questions as well:

• Test local website on a mobile device
• Run android app against a localhost API
• How to access localhost from a mobile browser
• How to access localhost from Android over Wi-Fi
• Connecting android app to your WAMP/XAMPP server
• Connecting to localhost web server from android application

Connect Android App to Localhost Over Wi-Fi

Simply typing localhost or http://127.0.0.1 in your app code won’t work. You need to obtain the IPv4 address of your PC/server. If you’re using Windows PC, you can follow these steps to find the IPv4 address:

• On Start menu, type cmd to open Command Prompt.
• Run ipconfig command there.
• You will get the IPv4 address as highlighted in the image below.

As you can see my IPv4 address is 192.168.1.110. However, you might be worrying, do each time I need to check IP? No, absolutely not. Let me share you three facts.

• Generally, it’s needed to check only when your router gets reset.
• In my case, I had set IP address pool range in my VDSL modem and I’m getting the same address for my local server since years regardless of PC/router restart. I have mentioned how I did it to connect the android app to localhost running on my computer.
• The third is, routers/modems give you the option to reserve the IPv4 address for the specific device and you can assign fixed IP to your local server.
  So fix once and always use that IP to access localhost from a mobile browser as well as your app.

Set up IP Pool Range in VDSL for Lasting Server Address

This step is optional and based on my personal experience. You generally don’t need it. Try only if your IPv4 address varies too much. Also, note that these are general instructions only and might vary from router to router.

• In your PC/laptop access http://192.168.1.1 and enter adequate credentials.
• You will have your router configuration page.
• Find the DHCP Server Settings page there.

On this page, set IP Pool Range and save changes. An IP Pool Range is a set of IP address range used by your router/modem to assign IPs to connected wired or wireless devices. Finally, don’t forget to restart the local server to take effect.

This page also shows you the list of connected devices along with their Mac Address. We will use it if this pool range setting doesn’t work for you.

Assign Fixed IP to Your Local Server and Access it in Mobile

Lastly, you can assign a permanent IP address to your local web server if above is not sufficient. Find DHCP Reserved or DHCP Static IP Configuration page in router configuration pages. You need to have Mac Address of localhost PC. Also, there is plenty of information available on the internet to find Mac Address of a device.

Give one desired IP address from range 192.168.1.2 to 192.168.1.255 (192.168.1.1 is normally the address of the router itself). Specify Mac Address (without colons if instructed) of local web server machine and save it. Restart your machine; confirm address using ipconfig command and you’re done.

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Connect Android to localhost: Test Android with PHP MySQL using WAMP

If you are using WAMP server to test your PHP files locally, Android localhost connection and testing PHP in your mobile phone is easy.

If you are working on PHP MySQL with your android app, it’s essential that you need to test your app for correct data before moving your database, PHP files and Android app to production. One way you can test for the same is, going live on the internet by hosting your files with hosting provider and it’s a bad idea to test your files live on the internet.

Rather than hosting your database and PHP files on the internet, you can test your app for PHP MySQL using localhost WAMP server. To do Android localhost connection, you need to install and setup WAMP server on your windows computer. If you don’t have WAMP server installed on your computer then you can refer tutorial Setup and Install WAMP Server.

People who already installed WAMP may try connecting android phone by entering http://localhost/ in your android code but that does not work for you because your phone does not understand what localhost is, and localhost is only an internal reference to your computer. Follow below tutorial to connect Android with localhost using IP address.

Successfully Running WAMP server on your computer indicates a green icon on system tray, click on that, with a menu pop up click on put online item. Wait for few second to process its task. below is the screenshot of wamp menu.

Now, you need to find your IPV4 address of your computer, run command prompt in your computer(go to Windows start button and start typig cmd) and type ipconfig and enter to see your IPV4 address of your computer. Below is the screenshot of command prompt.

Open your web browser and type your computer IPv4 address and go, for example http://192.168.1.7/ . by doing so you likely to see your localhost page. Now, you can access any page in localhost through your computer IP address.

If you don’t know how to connect android to PHP MySQL, you can refer some of tutorial below.

Android connect localhost in Emulator

To test your app for Android localhost connection with PHP MySQL in your android studio emulator, just enter address as http://IP Address/ followed by path of your PHP file in your code.

For example: http://192.168.1.7/test/example.php

Note: Before putting your address into code, test address in your browser for whether path is valid or not.

Android connect localhost in your Android Mobile Phone

Enter address as http://IP Address/ followed by path of your PHP file in your code.

For example: http://192.168.1.7/test/example.php

To test your app for Android localhost connection with PHP MySQL in Android Mobile Phone, your computer and mobile phone should be connected to same Wi-Fi router.

Note: Before putting your address into code, test address in your mobile browser for whether address is accessible or not.

What if i don’t have Internet or Wi-Fi router?

If you don’t have internet or Wi-Fi router connected, you can use below method that may work for you.

1. method1: Create new wireless network in your windows computer and connect your android phone through Wi-Fi.
2. method2: Install any Virtual Router and connect your phone through Wi-Fi.

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