Why MediaExtractor getTrackCount returns 0 in android 4.4.2

问题

I ran exactly the same code on:

• Android 4.1.2
• Android 4.2.2
• Android 4.4.2.

It works well on 4.1.2 and 4.2.2, but NOT on 4.4.2.

The problem is MediaExtractor.getTrackCount returns 0 on 4.4.2 (while it returns the right number on other devices)

Any idea?

I am also facing the very same issue. Did you got the solution ?

回答1:

I finally figured out where the problem is. For 4.4.2, u got to add permission in the AndroidManifest.xml about write external storage if you play local file. here is the code

来源：https://stackoverflow.com/questions/27127046/why-mediaextractor-gettrackcount-returns-0-in-android-4-4-2