android, how to get package name?

Question

In my application I need to know the name of package name. I have no problem when I want to grab it in activities but i can't take it in other classes. Following code is working in activity but i don't know why it has problem in simple class.

String packageName = getPackageName();

In my class I tried to write this code:

Context context = getApplicationContext();
String packageName = context.getPackageName();

but compiler said getApplicationContext() method is undefined for this class.

How can I take package name within this class?

Answer 1

The simple, or another way is to pass Context into the helper class constructor:

MyClassConstructor(Context context){

        String packageName = context.getPackageName(); 
}