解決Failed to load D:\Android-Studio\sdk\build-tools\26.0.1\lib\dx.jar

問題：升級了sdk之後運行出錯，Failed to load D:\Android-Studio\sdk\build-tools\26.0.1\lib\dx.jar

Unable to build: the file dx.jar was not loaded from the SDK folder

網上找了半天照着解決，結果都不成功，最後硬着頭皮看英文最後解決了，記錄一下。

第一種辦法:

• Delete "26.0.0" in "build-tools" directory
• Use "25.0.2" instead
• Restart eclipse

第二種辦法:

• add this in the project.properties of your project:
  sdk.buildtools=25.0.2

複製過來的 就不翻譯了。