Flutter Setup + Proxy Settings (Windows)

Flutter Setup

• Download Flutter
  • Download Flutter
  • Extract Downloaded Flutter SDK in a filder e.g. my case it is D:\installs\flutter_windows_3.27.3-stable\flutter
  • Update "Path" environment variable to the flutter SDK bin folder D:\installs\flutter_windows_3.27.3-stable\flutter\bin
  • Open new command prompt and run
    • flutter doctor
    • It will run the command possible with error of missing android tool chain etc, To create Android apps with Flutter, We need following android components be installed.
      • Android SDK Platform, API 35.0.2
      • Android SDK Command-line Tools
      • Android SDK Build-Tools
      • Android SDK Platform-Tools
      • Android Emulator
    • We will setup that now.

Configure Android Development

• Download Android Studio and Install with Default Configurations.
• After Installation Open Android Studio, in Welcome to Android Studio screen;
  • Open More Actions
  • SDK Manager
    • Open SDK Platforms Tab
      • Choose Android Version to install
      • Apply
      • It will Install Android SDK in AppData Local folder e.g. C:\Users\MY_USER\AppData\Local\Android\Sdk
    • Open SDK Tools Tab, Select;
      • Android SDK Build Tools
      • Android SDK Command Line Tools
      • Android Emulator
      • Android Emulator hypervisor driver
      • Android SDK platform-tools
      • Apply & OK

Verify Flutter Installation

Run;

• flutter doctor Every thing should be fine by now.

Optional Settings

Proxy Setup

If you are working behind a proxy environment, you may face proxy issue. Set Environment Vairables http_proxy, https_proxy and NO_PROXY with proxy settings;

Run these commands or manually set environment variables

• set http_proxy="http://username:password@host:8080"
• set https_proxy="http://username:password@host:8080"
• set NO_PROXY="localhost,127.0.0.1,::1"

If Issue persists, try to set Proxy Settings in Flutter Config;

• flutter config --http-proxy="http://username:password@host:8080"
• flutter config --https-proxy="http://username:password@host:8080"
• flutter config --no-proxy="localhost,127.0.0.1"

Run flutter doctor and reconfirm.

Enable Utility Commands

• Edit "Path" environment variable and add;
  • C:\Users\MY_USER\AppData\Local\Android\Sdk\cmdline-tools\latest\bin
  • it will make utility commands available in cmd like;
    • sdkmanager
    • apkanalyzer
    • avdmanager
  • You can try this command to test sdkmanager --licenses
• Edit "Path" environment variable and add;
  • C:\Users\721\AppData\Local\Android\Sdk\platform-tools
  • it will make "adb" command available in cmd. adb can be used for following commands;
    • adb kill-server
    • adb start-server
    • adb devices (List Running Devices, Emulators + Physical)

Known Issues

Device List not Loading

Issue;

• I was getting error while selecting Device to run a flutter project. Proxy was set but that didn't work.
• Running flutter doctor was showing everything OK but Connected device list was always taking so much time and then give error.
• I tried with "adb devices" command, and command was never responding (No Error but not completingg too.)
• I tried with "adb kill-server" command to kill process manually. but this command was also never responding (No Error but not completingg too.)
• I killed adb from task manager. Then I tried with "adb start-server" command, and command was never responding (No Error but not completingg too.)
• In short Problem was with ADB. Spending 3 days, struggling to find issue, tried all possible solutions like proxy settings, reinstall every thing but didnt find reason.
• At Last, found the reason and issue was port conflict with some other process.

Solution adb runs on port 5037

• Run command netstat -ano | findstr :5037 and enlist processes listening on this port.
• If another process is using port 5037 (which adb uses), kill that process and restart adb.
  • Close Android Studio and Apps and command prompts using Android SDKs.
  • Run command taskkill /PID 5484 /F
    • 5484 is example PID, replace it with your PIDs and kill all process.
    • Close this Command prompt
    • Open new command prompt
    • KILL ALL PIDS AT ONCE ::COMMAND:: for /f "tokens=5" %a in ('netstat -ano ^| findstr :5037') do taskkill /PID %a /F
  • Run commands
    • adb kill-server
    • adb start-server
    • adb devices

Flutter by default Uses JDK form <>Android\Android Studio\jbr\bin\java

To Fix PKIX Certificate Issue Add Proxy certificate in this path also along with installed JDK.

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Run this command; It helps to see if any error

adb nodaemon server

Run this in CMD as Administrator:

netstat -aon | findstr :5037

You’ll get something like: TCP 127.0.0.1:5037 ... ... PID:1234

Now Run; tasklist | findstr 1234

→ That tells you which process is blocking ADB (e.g., antivirus, another adb, emulator, etc.). Open Task Manager and Kill that process.

After freeing the port, Restart ADB: adb kill-server adb start-server adb devices