在Mac OS上安装Flutter

Question

on running flutter doctor i get the below dependency lacking :

Android toolchain - develop for Android devices (Android SDK 28.0.3)
     Could not determine java version
Android Studio (not installed)

But i have already installed both and developing apps on Android Studio.Then why flutter is not able to find these two?

It is complaining for the jre version as well.But internally Android Studio uses the jre which is already installed with it.

flutter doctor -v gives below output :

[✓] Flutter (Channel stable, v1.0.0, on Mac OS X 10.13.6 17G65, locale en-IN)
    • Flutter version 1.0.0 at /Users/<myusername>/Downloads/development/flutter
    • Framework revision 5391447fae (3 months ago), 2018-11-29 19:41:26 -0800
    • Engine revision 7375a0f414
    • Dart version 2.1.0 (build 2.1.0-dev.9.4 f9ebf21297)

[!] Android toolchain - develop for Android devices (Android SDK 28.0.3)
    • Android SDK at /Users/<myusername>/Library/Android/sdk
    • Android NDK at /Users/<myusername>/Library/Android/sdk/ndk-bundle
    • Platform android-28, build-tools 28.0.3
    • Java binary at: /usr/bin/java
    ✗ Could not determine java version

[!] iOS toolchain - develop for iOS devices
    ✗ Xcode installation is incomplete; a full installation is necessary for iOS development.
      Download at: https://developer.apple.com/xcode/download/
      Or install Xcode via the App Store.
      Once installed, run:
        sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
    • ios-deploy 1.9.4
    • CocoaPods version 1.6.0

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.io/setup/#android-setup for detailed instructions).

[!] Connected device
    ! No devices available

Answer 1

Solution for Xcode:

Install Xcode (get it from https://developer.apple.com/xcode/ )

Ensure Xcode app is in the /Applications directory (NOT /Users/{user}/Applications).

Point xcode-select to the Xcode app Developer directory using the following command: sudo xcode-select -s /Applications/Xcode.app/Contents/Developer

Note: Make sure your Xcode app path is correct.

Xcode: /Applications/Xcode.app/Contents/Developer Xcode-beta: /Applications/Xcode-beta.app/Contents/Developer