Using HorizontalScrollView for gallery - no pictures inside

Question

I'm trying to use a horizontalscrollview with the code from this site.

The code seems to work fine. I get no Errors, the scrollbar is visible and I can also scroll in it but there are no Pictures inside.

Does somebody know why this can happen?

Answer 1

The exception is pretty self-explanatory: it cannot find the pictures.

Aside from that: it's a pretty old post, the right way to achieve horizontal scrolling like this is to use RecyclerView with LinearLayoutManager set to HORIZONTAL.

Answer 2

Do you have any pictures in /test directory on your device's SD card?

edit:

The sample code needs some pictures under /(your app's external storage directory)/test directory on SD card.

String targetPath = getExternalStorageDirectory() + "/test/";

Please note that getExternalStorageDirectory() won't return the root path of the sdcard. If you want access to the root. Refer: How can I get external SD card path for Android 4.0+?

And make sure that a permission is needed. http://developer.android.com/guide/topics/data/data-storage.html#filesExternal

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

or

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />