java.lang.ClassCastException on switching fragments

Question

private void switchFragment(Fragment fragment) {
    if (getActivity() == null)
        return;

    ClassA pm = (ClassA) getActivity();
    pm.switchContent(fragment);
}

I am trying to switch fragments from ClassB, i am getting this exception when i try to do. I am trying to call the fragments of Class A Activity.

java.lang.ClassCastException: com.test.ClassB cannot be cast to com.test.ClassA

ρяσѕρєя K · Accepted Answer · 2013-04-04 15:56:53Z

3

use instanceof for checking getActivity() type before casting it to ClassA or ClassB. try it as :

if (getActivity() instanceof ClassA) {
  ClassA pm = (ClassA) getActivity();
  pm.switchContent(fragment);
 } 
 else if (getActivity() instanceof ClassB) {
  ClassB pm = (ClassB) getActivity();
  pm.switchContent(fragment);
}

answered Apr 4, 2013 at 15:56

ρяσѕρєя K

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2 Comments

ρяσѕρєя K Over a year ago

@Kevin : plz check this example for more help because currently you are trying to cast ClassB context to ClassA

Kevin Over a year ago

I am using that example, but i am just thinking on if i am in ClassB context... then the fragments of Class A can never be called Being as Class A context... when we are in Class B

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