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Android Build a Simple Android App (retired 2014) Pretty Little Things Adding Sounds

Posted by Steve Hunter
Steve Hunter
57,712 Points

NullPointerException in animateCrystalBall()

I'm having difficulties with code that previously worked just fine and that I've not changed! I assume the problem may lie elsewhere.

However, LogCat is giving me the following errors:

05-18 06:41:17.801: E/AndroidRuntime(1254): FATAL EXCEPTION: main 05-18 06:41:17.801: E/AndroidRuntime(1254): Process: uk.co.bigdogconsultants.crystalball, PID: 1254 05-18 06:41:17.801: E/AndroidRuntime(1254): java.lang.NullPointerException 05-18 06:41:17.801: E/AndroidRuntime(1254): at uk.co.bigdogconsultants.crystalball.MainActivity.animateCrystalBall(MainActivity.java:49) 05-18 06:41:17.801: E/AndroidRuntime(1254): at uk.co.bigdogconsultants.crystalball.MainActivity.access$2(MainActivity.java:47) 05-18 06:41:17.801: E/AndroidRuntime(1254): at uk.co.bigdogconsultants.crystalball.MainActivity$1.onClick(MainActivity.java:40)

Line 40 is the call to the animateCrystalBall method Line 47 is the declaration/definition of the method and Line 49 is 

mCrystalBallImage.setImageResource(R.drawable.ball_animation);

I can't see anything wrong with that. The 

ball_animation.xml

file is there unaltered so I'm not sure what is pointed at that is Null.

Any ideas?

Thanks.

Steve Hunter
Steve Hunter
57,712 Points

And if I comment out the call to the method everything works fine just without the animation, obviously!

2 Answers

Anthony H
Anthony H
2,515 Points
Anthony H
Anthony H
2,515 Points

Post your log cat file and source @ pastebin.com/ then we can look at the code/files you're have problems with ;)

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

This self-fixed somehow. I can't replicate the problem and the animation works fine!