Got exception: fragment already active

I have a fragment;

MyFragment myFrag = new MyFragment();

I put bundle data to this fragment:

Bundle bundle = new Bundle(); 
bundle.putString("TEST", "test");
myFrag.setArguments(bundle);

Then, I replace old fragment with this one and put on backstack:

//replace old fragment
fragmentTransaction.replace(R.id.fragment_placeholder, myFrag, "MyTag");
//put on backstack
fragmentTransaction.addToBackStack(null);
//commit & get transaction ID
int transId = fragmentTransaction.commit();

Later, I pop backstack with the above transaction ID(transId):

//pop the transaction from backstack
fragmentManager.popBackStack(transId,FragmentManager.POP_BACK_STACK_INCLUSIVE); 

Later, I set bundle data as argument again to my fragment(myFrag):

//Got Java.lang.IllegalStateException: fragment already active
myFrag.setArguments(bundle);

As you see, my above code got exception Java.lang.IllegalStateException: fragment already active . I don't understand why myFrag is still active though I have popped the transaction of it from backstack., anyhow, since I got the exception I thought I have no choice but de-active the fragment, So, I did:

Fragment activeFragment = fragMgr.findFragmentByTag("MyTag");
fragmentTransaction.remove(activeFragment);

I am not sure if my above code really can de-active the fragment, since I didn't find how to de-active an fragment. :(

After that, when I try to set bundle data to my fragment myFrag again, I still got the same error:

Java.lang.IllegalStateException: fragment already active

Seems even I removed the fragment, it is still active...Why? How to de-active a fragment?

Reading the setArguments(Bundle args) source will help you understand:

/**
* Supply the construction arguments for this fragment.  This can only
* be called before the fragment has been attached to its activity; that
* is, you should call it immediately after constructing the fragment.  The
* arguments supplied here will be retained across fragment destroy and
* creation.
*/
public void setArguments(Bundle args) {

    if (mIndex >= 0) {
        throw new IllegalStateException("Fragment already active");
    }
    mArguments = args;
}

You cannot use setArguments(Bundle args) again in your code on the same Fragment. What you want to do I guess is either create a new Fragment and set the arguments again. Or you can use getArguments() and then use the put method of the bundle to change its values.

Try removing the previous fragment before adding the new one: https://stackoverflow.com/a/6266144/969325

remove() change fragment status to de-actiive. In your case, you just didn't call commit() after remove(..).

fragmentTransaction.remove(activeFragment);

You would do commit() after remove(), too.

fragmentTransaction.remove(activeFragment).commit();