How to use getSystemService in a non-activity class?

Question

I am building an application which triggers an alarm via AlarmManager.

I would like to be able to call the Alarm via it\'s own non-activity class, but since I am not

Answer 1

Service and Activity inherit from Context - so when you are calling getSystemService in these classes, you are really calling super.getSystemService.

If you want to have a Context available in another class, you can pass one as an argument to a method of that class, keep a reference to it, etc.

Edit: Code sample. But seriously, it is extremely basic - if you understand inheritance and methods.

class MyActivity extends Activity { // Activity extends Context, so MyActivity also extends Context
  void someMethod() {
    MyOtherClass.useStaticContext(this);
    MyOtherClass instance = new MyOtherClass();
    instance.useInstanceContext(this.getApplicationContext());
  }
}
class MyOtherClass {
  static void useStaticContext(Context context) {
  }
  void useInstanceContext(Context context) {
  }
}