Wifi

ADB over Wifi, pre Android 11

~ Aditya

Yep, this is doable too. But it requires an initial connection over USB.

  1. Connect the device over USB, with USB debugging enabled
  2. Open a terminal and check the device is connected:
    > adb devices
  3. Ask the device to listen for adb connections on a particular port:
    > adb tcpip 12345 or
    > adb -s DEVICE_ID tcpip 12345
  4. Once the adb has restarted, disconnect the device from USB.
  5. Check the device IP address, and connect to it over wifi:
    > adb connect 192.168.0.2:12345
  6. Ready to develop.
  7. Once done with dev, return the device to USB mode to not let the tcp port open as as security risk:
    > adb usb​

It’s a bit more work than the simple settings toggle on Android 11, but works just as well once connected.

Note: The devices need to be on the same wifi network, and not be connected through VPN.

Offline Testing In Chrome

~ Aditya
Offline - No Wifi
Offline testing in Chrome – No more WiFi toggling

Despite ever expanding web of internet connectivity, no modern web app can expect not to work decently when offline.

Testing offline functionality, though, can be a bit of a bummer for people like me who develop almost exclusively in/for Google Chrome – unlike the old Internet Explorer, it doesn’t have a quick to access ‘Offline Mode’.

Not being a professional developer, I didn’t have extensive tools at my service to test my app in offline mode, and switching WiFi off-on was becoming tiresome. This is the solution I’ve ended up with, and if you’re looking for offline testing in Chrome, here’s an easy way:

1. Install the Proxy SwitchySharp extension from Chrome Web Store.

2. In extension’s settings, set up a proxy to a non-existent IP Address, preferably on your local network. You could even set it to localhost/127.0.0.1 if you aren’t running a server on local machine.

Proxy Switchy Sharp Settings
Proxy SwitchySharp Extension Settings

3. Now every time you need to switch to offline mode, all you have to do is go to the extension’s browser button, and select the local-profile you created.

 

Browser Button - Select Proxy
Browser Button – Select proxy to go offline.

4. When you want to go back on-line, just select ‘Direct Connection’ or, if you have a corporate proxy, then that.

That’s it! No more toggling WiFi to test offline mode for your web apps.