Cannot find symbol 'getSystemService' in AudioManager

Question

I am using the following code to create an instance of AudioManager :

AudioManager mgr = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
mgr.setStreamMute(AudioManager.STREAM_SYSTEM, true);

while compiling i get an error saying:

Cannot find symbol  : method getSystemService(java.lang.String)
AudioManager mgr = (AudioManager)getSystemService(Context.AUDIO_SERVICE);

I also tried using :

AudioManager mgr = (AudioManager)Context.getSystemService(Context.AUDIO_SERVICE);

and I got the error:

non-static method getSystemService(java.lang.String) cannot be referenced from a static context

Which is the correct way of using the class and how can I avoid the above errors!

http://stackoverflow.com/questions/12555828/getting-a-cannot-find-symbol-method-getsystemservice-from-ant, you need use context of activity class instead of Context if you are not in activity class — Shayan Pourvatan, Jun 07 '14 at 06:52
You need a `Context` instance to use this method. Where is this code located? — matiash, Jun 07 '14 at 06:52
@shayanpourvatan : i have gone through this post but it didnt help! — Sid, Jun 07 '14 at 06:53
Have you tried cleaning your project? What's the context of the call of the method? As far as I can tell, you're calling the `getSystemService` method from a static context. — arielnmz, Jun 07 '14 at 06:53
see my edit comment @Sid and if you are not in activity class use context of activity — Shayan Pourvatan, Jun 07 '14 at 06:54
so should i create and instance of Context class first and then use it? — Sid, Jun 07 '14 at 06:55
you need pass context of activity to constructor of that class — Shayan Pourvatan, Jun 07 '14 at 06:56
Could you please post the block (Class, method) that surrounds the call to that method? — arielnmz, Jun 07 '14 at 06:57
@Sid No, you need to receive a Context instance from somewhere. Please post the enclosing class. — matiash, Jun 07 '14 at 06:57

score 3 · Answer 1 · answered Jun 07 '14 at 11:23

use following in your main activity class

Context context=getApplicationContext();

then pass context into your constructor of class in which you are creating AudiManager's object. Then use

AudioManager mgr = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
mgr.setStreamMute(AudioManager.STREAM_SYSTEM, true);

1 Answers1