NullPointerException - Attempt to get length of null array (readDirectory())

Question

I have the code as shown here. My Problem is a NullPointerException at files.length

for(int i=0; i < files.length; i++){

It is caused b

Answer 1

f.listFiles()

will return null if the path does not exist.

Please check your path.

Update

Android will also require a permission to read certain files. Maybe you need to add this to your manifest:

More information:

http://developer.android.com/reference/android/Manifest.permission.html