默认是会下载sdk等文件的
Preparing "Install Android SDK Tools (revision: 26.1.1)".
Downloading https://dl.google.com/android/repository/sdk-tools-darwin-4333796.zip
"Install Android SDK Tools (revision: 26.1.1)" ready.
Installing Android SDK Tools in /Users/chenxiangan/Library/Android/sdk/tools
"Install Android SDK Tools (revision: 26.1.1)" complete.
"Install Android SDK Tools (revision: 26.1.1)" finished.
Preparing "Install SDK Patch Applier v4 (revision: 1)".
Downloading https://dl.google.com/android/repository/3534162-studio.sdk-patcher.zip
"Install SDK Patch Applier v4 (revision: 1)" ready.
Installing SDK Patch Applier v4 in /Users/chenxiangan/Library/Android/sdk/patcher/v4
"Install SDK Patch Applier v4 (revision: 1)" complete.
"Install SDK Patch Applier v4 (revision: 1)" finished.
Preparing "Install Android Emulator (revision: 29.2.1)".
Downloading https://dl.google.com/android/repository/emulator-darwin-5889189.zip
"Install Android Emulator (revision: 29.2.1)" ready.
Installing Android Emulator in /Users/chenxiangan/Library/Android/sdk/emulator
"Install Android Emulator (revision: 29.2.1)" complete.
"Install Android Emulator (revision: 29.2.1)" finished.
Preparing "Install Android SDK Platform-Tools (revision: 29.0.4)".
Downloading https://dl.google.com/android/repository/platform-tools_r29.0.4-darwin.zip
"Install Android SDK Platform-Tools (revision: 29.0.4)" ready.
Installing Android SDK Platform-Tools in /Users/chenxiangan/Library/Android/sdk/platform-tools
"Install Android SDK Platform-Tools (revision: 29.0.4)" complete.
"Install Android SDK Platform-Tools (revision: 29.0.4)" finished.
Preparing "Install Intel x86 Emulator Accelerator (HAXM installer) (revision: 7.5.1)".
Downloading https://dl.google.com/android/repository/extras/intel/haxm-macosx_v7_5_1.zip
"Install Intel x86 Emulator Accelerator (HAXM installer) (revision: 7.5.1)" ready.
Installing Intel x86 Emulator Accelerator (HAXM installer) in /Users/chenxiangan/Library/Android/sdk/extras/intel/Hardware_Accelerated_Execution_Manager
"Install Intel x86 Emulator Accelerator (HAXM installer) (revision: 7.5.1)" complete.
"Install Intel x86 Emulator Accelerator (HAXM installer) (revision: 7.5.1)" finished.
Preparing "Install Android SDK Build-Tools 29.0.2 (revision: 29.0.2)".
Downloading https://dl.google.com/android/repository/build-tools_r29.0.2-macosx.zip
"Install Android SDK Build-Tools 29.0.2 (revision: 29.0.2)" ready.
Installing Android SDK Build-Tools 29.0.2 in /Users/chenxiangan/Library/Android/sdk/build-tools/29.0.2
"Install Android SDK Build-Tools 29.0.2 (revision: 29.0.2)" complete.
"Install Android SDK Build-Tools 29.0.2 (revision: 29.0.2)" finished.
Preparing "Install Android SDK Platform 29 (revision: 3)".
Downloading https://dl.google.com/android/repository/platform-29_r03.zip
"Install Android SDK Platform 29 (revision: 3)" ready.
Installing Android SDK Platform 29 in /Users/chenxiangan/Library/Android/sdk/platforms/android-29
"Install Android SDK Platform 29 (revision: 3)" complete.
"Install Android SDK Platform 29 (revision: 3)" finished.
Preparing "Install Sources for Android 29 (revision: 1)".
Downloading https://dl.google.com/android/repository/sources-29_r01.zip
"Install Sources for Android 29 (revision: 1)" ready.
Installing Sources for Android 29 in /Users/chenxiangan/Library/Android/sdk/sources/android-29
"Install Sources for Android 29 (revision: 1)" complete.
"Install Sources for Android 29 (revision: 1)" finished.
Parsing /Users/chenxiangan/Library/Android/sdk/build-tools/29.0.2/package.xml
Parsing /Users/chenxiangan/Library/Android/sdk/emulator/package.xml
Parsing /Users/chenxiangan/Library/Android/sdk/extras/intel/Hardware_Accelerated_Execution_Manager/package.xml
Parsing /Users/chenxiangan/Library/Android/sdk/patcher/v4/package.xml
Parsing /Users/chenxiangan/Library/Android/sdk/platform-tools/package.xml
Parsing /Users/chenxiangan/Library/Android/sdk/platforms/android-29/package.xml
Parsing /Users/chenxiangan/Library/Android/sdk/sources/android-29/package.xml
Parsing /Users/chenxiangan/Library/Android/sdk/tools/package.xml
Android SDK is up to date.
Running Intel® HAXM installer