1、NDK下载地址：
macosx-64bit：https://dl-ssl.google.com/android/repository/android-ndk-r17b-darwin-x86_64.zip
linux-64bit：https://dl-ssl.google.com/android/repository/android-ndk-r17b-linux-x86_64.zip
windows-32bit：https://dl-ssl.google.com/android/repository/android-ndk-r17b-windows-x86.zip
windows-64bit：https://dl-ssl.google.com/android/repository/android-ndk-r17b-windows-x86_64.zip

2、SDK下载地址：
Android SDK Platform 28：https://dl-ssl.google.com/android/repository/platform-28_r06.zip
Android SDK Platform 27：https://dl-ssl.google.com/android/repository/platform-27_r03.zip
Android SDK Platform 26：https://dl-ssl.google.com/android/repository/platform-26_r02.zip
Android SDK Platform 25：https://dl-ssl.google.com/android/repository/platform-25_r03.zip
Android SDK Platform 24：https://dl-ssl.google.com/android/repository/platform-24_r02.zip
Android SDK Platform 23：https://dl-ssl.google.com/android/repository/platform-23_r03.zip
Android SDK Platform 22：https://dl-ssl.google.com/android/repository/android-22_r02.zip
Android SDK Platform 21：https://dl-ssl.google.com/android/repository/android-21_r02.zip
Android SDK Platform 20：https://dl-ssl.google.com/android/repository/android-20_r02.zip
Android SDK Platform 19：https://dl-ssl.google.com/android/repository/android-19_r04.zip
Android SDK Platform 18：https://dl-ssl.google.com/android/repository/android-18_r03.zip
Android SDK Platform 17：https://dl-ssl.google.com/android/repository/android-17_r03.zip
Android SDK Platform 16：https://dl-ssl.google.com/android/repository/android-16_r05.zip
Android SDK Platform 15：https://dl-ssl.google.com/android/repository/android-15_r05.zip
Android SDK Platform 14：https://dl-ssl.google.com/android/repository/android-14_r04.zip
Android SDK Platform 13：https://dl-ssl.google.com/android/repository/android-3.2_r01.zip
Android SDK Platform 12：https://dl-ssl.google.com/android/repository/android-3.1_r03.zip
Android SDK Platform 11：https://dl-ssl.google.com/android/repository/android-3.0_r02.zip
Android SDK Platform 10：https://dl-ssl.google.com/android/repository/android-2.3.3_r02.zip
Android SDK Platform 9：https://dl-ssl.google.com/android/repository/android-2.3.1_r02.zip
Android SDK Platform 8：https://dl-ssl.google.com/android/repository/android-2.2_r03.zip
Android SDK Platform 7：https://dl-ssl.google.com/android/repository/android-2.1_r03.zip

3、build-tool下载地址：
linux-28.0.1：https://dl-ssl.google.com/android/repository/build-tools_r28.0.1-linux.zip
macosx-28.0.1：https://dl-ssl.google.com/android/repository/build-tools_r28.0.1-macosx.zip
windows-28.0.1：https://dl-ssl.google.com/android/repository/build-tools_r28.0.1-windows.zip

linux-27.0.3：https://dl-ssl.google.com/android/repository/build-tools_r27.0.3-linux.zip
macosx-27.0.3：https://dl-ssl.google.com/android/repository/build-tools_r27.0.3-macosx.zip
windows-27.0.3：https://dl-ssl.google.com/android/repository/build-tools_r27.0.3-windows.zip

linux-26.0.3：https://dl-ssl.google.com/android/repository/build-tools_r26.0.3-linux.zip
macosx-26.0.3：https://dl-ssl.google.com/android/repository/build-tools_r26.0.3-macosx.zip
windows-26.0.3：https://dl-ssl.google.com/android/repository/build-tools_r26.0.3-windows.zip

linux-25.0.3：https://dl-ssl.google.com/android/repository/build-tools_r25.0.3-linux.zip
macosx-25.0.3：https://dl-ssl.google.com/android/repository/build-tools_r25.0.3-macosx.zip
windows-25.0.3：https://dl-ssl.google.com/android/repository/build-tools_r25.0.3-windows.zip

linux-24.0.3：https://dl-ssl.google.com/android/repository/build-tools_r24.0.3-linux.zip
macosx-24.0.3：https://dl-ssl.google.com/android/repository/build-tools_r24.0.3-macosx.zip
windows-24.0.3：https://dl-ssl.google.com/android/repository/build-tools_r24.0.3-windows.zip

linux-23.0.3：https://dl-ssl.google.com/android/repository/build-tools_r23.0.3-linux.zip
macosx-23.0.3：https://dl-ssl.google.com/android/repository/build-tools_r23.0.3-macosx.zip
windows-23.0.3：https://dl-ssl.google.com/android/repository/build-tools_r23.0.3-windows.zip

linux-22.0.1：https://dl-ssl.google.com/android/repository/build-tools_r22.0.1-linux.zip
macosx-22.0.1：https://dl-ssl.google.com/android/repository/build-tools_r22.0.1-macosx.zip
windows-22.0.1：https://dl-ssl.google.com/android/repository/build-tools_r22.0.1-windows.zip

linux-21.1.2：https://dl-ssl.google.com/android/repository/build-tools_r21.1.2-linux.zip
macosx-21.1.2：https://dl-ssl.google.com/android/repository/build-tools_r21.1.2-macosx.zip
windows-21.1.2：https://dl-ssl.google.com/android/repository/build-tools_r21.1.2-windows.zip

linux-20.0.0：https://dl-ssl.google.com/android/repository/build-tools_r20-linux.zip
macosx-20.0.0：https://dl-ssl.google.com/android/repository/build-tools_r20-macosx.zip
windows-20.0.0：https://dl-ssl.google.com/android/repository/build-tools_r20-windows.zip

linux-19.1.0：https://dl-ssl.google.com/android/repository/build-tools_r19.1-linux.zip
macosx-19.1.0：https://dl-ssl.google.com/android/repository/build-tools_r19.1-macosx.zip
windows-19.1.0：https://dl-ssl.google.com/android/repository/build-tools_r19.1-windows.zip

linux-18.1.1：https://dl-ssl.google.com/android/repository/build-tools_r18.1.1-linux.zip
macosx-18.1.1：https://dl-ssl.google.com/android/repository/build-tools_r18.1.1-macosx.zip
windows-18.1.1：https://dl-ssl.google.com/android/repository/build-tools_r18.1.1-windows.zip

linux-17.0.0：https://dl-ssl.google.com/android/repository/build-tools_r17-linux.zip
macosx-17.0.0：https://dl-ssl.google.com/android/repository/build-tools_r17-macosx.zip
windows-17.0.0：https://dl-ssl.google.com/android/repository/build-tools_r17-windows.zip

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