FileOutputStream failed with FileNotFoundException even though the File apparently, exists, is writeable and has permissions?

Try this if(!Environment. GetExternalStorageState(). Equals(Environment.

MEDIA_MOUNTED)) { Log. E("TEST", "this is bad"); } File file = new File(getExternalFilesDir(null), "test. Csv"); try { FileOutputStream fos = new FileOutputStream(file); fos.

Write(...); fos.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }.

This example works for me. However, I just tried adding file.createNewfile(); right before creating the FileOutputStream, and then I got the same error you did. – aleph_null Nov 2 at 0:20 Although the getExternalFilesDir() method appears in developer.android.Com/reference/android/content/Context.

Html ..Eclipse claims this in not defined on Context for Level 7 build. So I am even more confused by my set-up. – Eddie Moxey Nov 2 at 9:36.

There are a number of lessons to be learned from reading this. Firstly make sure that your Eclipse or other IDE is completely updated and that all the packages and tools are loaded correctly. The next lesson is to make sure that you know how all the tools work!

See below - File_Explorer in DDMS. The biggest single issue that was associated with these apparent coding problems was that the results from my coding experiments, as provided through the Eclipse debugging tools, were showing me a completely different picture to that described in the Android documentation. My own paranoia created the rest of the problems and I simply included to many versions of code snippets and too many tests.

The technical issuee/answers are a follows: 1. Android 2.1(API-L7) and 2.2(API-L8) implement a different sdcard file structure. So getExternalStorageDirectory() returns /sdcard/ for the L7 and /mnt/sdcard/ for the L8.2.The Android documentation for External Storage on http://developer.android.com/guide/topics/data/data-storage.html is correct; Use Environment.

GetExternalStorageDirectory() for 2.1(L7)+ and only use Context. GetExternalFilesDir(null) for 2.2(L8)+.3. Contructing a File object does not create the file or the directories for the names provided.

You must use the mkdirs() and createNewFile() if you want the actually create a directory tree beyond the root and the file within it. However, an actual file is created when you successfully open a FileOutputStream, so there is often no need to use createNewFile(). You MUST use mkdirs is you want to create your own directories.4.

The Android Virtual Devices created in Eclipse and used with the Emulator actually do create directories and files and you can see these using the File_Explorer tab on the DDMS during debug. NOTE: These directories and files are persistent and NOT automatically deleted. Use the the tools to delete the files yourself after you run or debug your code.

5. Finally BufferedOutputStream using byte arrays is the preferred option for small files and/or multiple writes. FileWrite is used for char arrays and in all cases you must include in you Manifest.

XML A final apology for the wordy Q&A, but I hope lots of people read and learn for my pain. :o).

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