CODEWITHSUNDEEP
android
shd
shd

Reputation: 1119

why i get null on getView?

why i get null on the following code when i use getView? 

public void menuItemSelected(int itemId) {


        FragmentTransaction ft = getFragmentManager().beginTransaction(); 
        ft.replace(R.layout.fragment_main, mShoppingCartFragment, "ShoppingCartFragment"); 
        ft.commit();
        ft.addToBackStack(null);
        View aaa = mShoppingCartFragment.getView(); <-- null here
        TextView fk = (TextView)findViewById(R.id.textView1); <-- null here
        fk.setText("clicked by " + itemId);

    }

Upvotes: 0

Views: 108

Answers (2)

idog
idog

Reputation: 863

As Steve mentioned FragmentTransaction.commit()

is an asynchronous call, but you can always call to:

ft.executePendingTransactions();

And you will block on this method until all the pending transactions will complete

Upvotes: 1

Steve Benett
Steve Benett

Reputation: 12933

The FragmentTransaction.commit() is an asynchronous call, hence it doesn't return immediatly. So, your Fragment could be null, if you call View aaa = mShoppingCartFragment.getView(); right after it.

Furthermore Fragment.getView() will be null, if the callback onCreateView(...) hasn't returned or you return null for it, which means there is no View associated with this Fragment.

Both is possible in your code snippet.

If TextView fk = (TextView)findViewById(R.id.textView1); returns null make sure, the id textView1 is part of the layout of the Activity. If it's a View for the Fragment get the reference there.

Upvotes: 0

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