android studio 运行 报错 ERROR: Unable to open PNG file；Error Code: 42

最近在用android stuidio 用的是gradle 构建的工程，运行的时候报错Error Code 42 ; ERROR: Unable to open PNG file ：

查阅相关资料，路径过长或者路径名称中有中文或者空格导致的

知道原因了，文件头就可以解决了；如果要查看详细的错误信息，可以看下面的

Error:Execution failed for task ‘:samples:mergeDebugResources‘.
> Error: Failed to run command:
    D:\Program\android2\adt-bundle-windows-x86_64-20140702\sdk\build-tools\21.1.2\aapt.exe s -i D:\android\study_work\shanxing menu\xcb-shanxing menu

\CircularFloatingActionMenu-master\CircularFloatingActionMenu-master\samples\build\intermediates\exploded-aar\com.android.support\appcompat-v7\21.0.0\res

\drawable-ldrtl-xxhdpi\abc_ic_ab_back_mtrl_am_alpha.png -o D:\android\study_work\shanxing menu\xcb-shanxing menu\CircularFloatingActionMenu-master

\CircularFloatingActionMenu-master\samples\build\intermediates\res\debug\drawable-ldrtl-xxhdpi-v17\abc_ic_ab_back_mtrl_am_alpha.png
Error Code:
    42
Output:
    D:\android\study_work\shanxing menu\xcb-shanxing menu\CircularFloatingActionMenu-master\CircularFloatingActionMenu-master\samples\build\intermediates

\exploded-aar\com.android.support\appcompat-v7\21.0.0\res\drawable-ldrtl-xxhdpi\abc_ic_ab_back_mtrl_am_alpha.png ERROR: Unable to open PNG file