Attempt to invoke virtual method 'void android.media.MediaPlayer.start()' on a null object reference
49
What is a NullPointerException, and how do I fix it?
85646
MediaPlayer no longer working on the emulator since r10?
87189
System.NullPointerException
2727
Android How to use MediaScannerConnection scanFile
134538
Android Resources$NotFoundException
143664
setOnClickListener crashs my android app
76802
Dismiss MPMoviePlayerViewController on play error
33577
Implement Thread Android in my class?
146476
Java: Why aren't NullPointerExceptions called NullReferenceExceptions?
147603
How can I call a method in an object from outside the JVM?
116040
Is onResume() called before onActivityResult()?
289
What is a NullReferenceException, and how do I fix it?
95009
Call Activity method from adapter
33103
How come invoking a (static) method on a null reference doesn't throw NullPointerException?
140738
Does setting Java objects to null do anything anymore?
32065
Attempt to de-reference a null object: Trigger
85978
" java.lang.IllegalArgumentException: uri.getScheme() == null! " error using JavaFX to play audio