环境：macOS 10.12.6

操作：

$ java --version
java 9
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)
$ brew cask install android-sdk
==> Caveats
We will install android-sdk-tools, platform-tools, and build-tools for you.
You can control android sdk packages via the sdkmanager command.
You may want to add to your profile:
  'export ANDROID_SDK_ROOT=/usr/local/share/android-sdk'

This operation may take up to 10 minutes depending on your internet connection.
Please, be patient.

==> Satisfying dependencies
==> Downloading 451K9s2c8@1M7s2y4Q4x3@1q4Q4x3V1k6Q4x3V1k6V1L8q4)9J5k6h3N6G2L8$3N6D9k6g2)9J5k6h3y4G2L8g2)9J5c8X3q4F1k6s2u0G2K9h3c8Q4x3V1k6J5k6i4m8G2M7$3W2@1L8%4u0&6i4K6u0r3M7$3c8C8i4K6u0V1N6r3!0G2L8s2y4Q4x3X3c8V1j5i4u0%4K9h3&6Q4x3X3b7K6z5o6f1&6x3K6V1%4i4K6u0W2P5X3W2H3
Already downloaded: /Users/tomasnovella/Library/Caches/Homebrew/Cask/android-sdk--3859397,26.0.1.zip
==> Verifying checksum for Cask android-sdk
==> Installing Cask android-sdk
==> Exception in thread "main"
==> java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
==>     at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
==>     at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
==>     at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
==>     at com.android.sdklib.tool.SdkManagerCli.main(SdkManagerCli.java:117)
==>     at com.android.sdklib.tool.SdkManagerCli.main(SdkManagerCli.java:93)
==> Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
==>     at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
==>     at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
==>     at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
==>     ... 5 more
Error: Command failed to execute!

==> Failed command:
/usr/local/Caskroom/android-sdk/3859397,26.0.1/tools/bin/sdkmanager tools platform-tools build-tools;26.0.1

==> Standard Output of failed command:


==> Standard Error of failed command:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
    at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
    at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
    at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
    at com.android.sdklib.tool.SdkManagerCli.main(SdkManagerCli.java:117)

即使尝试自己下载，也会出现这个java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema的问题，搜索中文网站无果之后，在万能的StackOverFlow找到了答案，原来是*Java9太新了，要回到Java8*就好了

解决步骤：

1. brew cask uninstall java # uninstall java9
2. brew tap caskroom/versions
3. brew cask install java8 # install java8
4. touch ~/.android/repositories.cfg # without this file, error will occur on next step
5. brew cask install android-sdk

通过此步骤操作成功！

成功安装各种sdk

$ sh sdkmanager  "platform-tools" "platforms;android-25"
License android-sdk-license:
---------------------------------------
Terms and Conditions

This is the Android Software Development Kit License Agreement

1. Introduction

1.1 The Android Software Development Kit (re
...
...

14.7 The License Agreement, and your relationship with Google under the License Agreement, shall be governed by the laws of the State of California without regard to its conflict of laws provisions. You and Google agree to submit to the exclusive jurisdiction of the courts located within the county of Santa Clara, California to resolve any legal matter arising from the License Agreement. Notwithstanding this, you agree that Google shall still be allowed to apply for injunctive remedies (or an equivalent type of urgent legal relief) in any jurisdiction.


November 20, 2015
---------------------------------------
Accept? (y/N): y
done
roysuedeiMac:bin roysue$

adb和fastboot安装成功！

$ ./adb
Android Debug Bridge version 1.0.39
Revision 3db08f2c6889-android
Installed as /Users/roysue/Downloads/platform-tools/./adb

global options:
 -a         listen on all network interfaces, not just localhost
 -d         use USB device (error if multiple devices connected)
 -e         use TCP/IP device (error if multiple TCP/IP devices available)
 -s SERIAL
     use device with given serial number (overrides $ANDROID_SERIAL)
 -p PRODUCT
     name or path ('angler'/'out/target/product/angler');
     default $ANDROID_PRODUCT_OUT
 -H         name of adb server host [default=localhost]
 -P         port of adb server [default=5037]
 -L SOCKET  listen on given socket for adb server [default=tcp:localhost:5037]

general commands:
 devices [-l]             list connected devices (-l for long output)

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