Android internal storage reading file

Question

I have a problem with Android internal storage. I have created folder in package root folder calling getDir() and with MODE_WORLD_WRITEABLE because I want camera app to write captured image in this folder. Anyway, I can see that captured image is inside that folder with DDMS . Problem is that I cannot read that file.

I tried to read file with this code:

File file = context.getDir("images", Context.MODE_WORLD_READABLE);
File image = new File(file, "image.jpeg");
if (image.canRead()) 
    Log.w("read", "can read");
else
    Log.w("read", "can't read");

And in LogCat there is only second message (can't read).

I have also tried to create FileInputStream with file name but I receive FileNotFoundException .

Can somebody tell me what I'm doing wrong here?

Thanks in advance

EDIT:

Reading file is correct but only problem is that when cam app is saving image to specified location, permission set by cam app to image file are -rwxrwx---. After changing permissions with

adb (chmod 777 image.jpeg) 

I was able to read image. Interesting thing is that cam app is writing images files to sdcard with ----rwxr-x .

Is there any way to change file permission in runtime?

Answer 1

Why not put it in the default photo directory?

File path = Environment.getExternalStoragePublicDirectory(
        Environment.DIRECTORY_PICTURES);
File file = new File(path, "DemoPicture.jpg");

( From: http://developer.android.com/reference/android/os/Environment.html )

See also a more complete example invoking the camera app: http://developer.android.com/training/camera/photobasics.html

Answer 2

Referencing to Android developers you should use openFileOutput() and openFileInput() to work on the internal storage... you are not allowed / not able to make dirs there. Android does it itself.. Those data will be cleared when your application will be deleted.