FileProvider.getUriForFile is throwing StringIndexOutOfBoundsException

First thing to mention, answers to the question here do not help. The source code looks like the following: ``` Intent intent = new Intent("com.mycompany.action.PICK_FILE"); String authority = "com.mycompany.fileprovider"; File file = Environment.getExternalStorageDirectory(); intent.setData(FileProvider.getUriForFile(this, authority, file)); ``` `FileProvider.getUriForFile` is throwing the exception and here is the stack trace: ``` java.lang.StringIndexOutOfBoundsException: length=15; index=16 at java.lang.String.indexAndLength(String.java:500) at java.lang.String.substring(String.java:1313) at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:687) at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:377) ``` In `AndroidManifest.xml` inside of `application` tag I have added the following: ``` <provider android:name="android.support.v4.content.FileProvider" android:authorities="com.mycompany.fileprovider" android:exported="false" android:grantUriPermissions="true" > <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths" /> </provider> ``` Content of `file_paths.xml` is the following: ``` <paths xmlns:android="http://schemas.android.com/apk/res/android"> <external-path name="input_files" path="." /> <external-path name="output_files" path="MyAppName/" /> </paths> ``` `output_files` path is not used in this context. I have run debugger through `FileProvider.SimplePathStrategy.getUriForFile()`. Relevant code snippet is the following (lines 683-688): ``` final String rootPath = mostSpecific.getValue().getPath(); if (rootPath.endsWith("/")) { path = path.substring(rootPath.length()); } else { path = path.substring(rootPath.length() + 1); } ``` `rootPath` is evaluated as `/storage/sdcard` which is also the exact value of `path`, so it's not wonder that the exception is thrown. What am I doing wrong? UPDATE: As suggested bellow, passed `java.io.File` should not be a directory. Docs are ambiguous and never say that explicitly. The workaround would be to create uri 'manually'. Thus ``` intent.setData(FileProvider.getUriForFile(this, authority, file)); ``` should be replaced with: ``` intent.setData(Uri.parse("content://" + file.getAbsolutePath())); ```