CODEWITHSUNDEEP
javaandroidfragment
Jungle
Jungle

Reputation: 107

FragmentTransaction replace doesn't work

I won't replace my fragment, but I have one problem, when I call replace after beginTransaction() Android Studio doesn't give me an error.

FragmentManager fragmentManager = getFragmentManager();   
FragmentTransaction fragmentTransaction = fragmentManager 
        .beginTransaction().replace(R.id.l, fragment);

However, when I do something like this:

FragmentManager fragmentManager = getFragmentManager();   
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction()
fragmentTransaction.replace(R.id.l, fragment);

Android Studio tells me that fragmentTransaction doesn't have this method. When I do something like this I am having error that commit() return int and AS proposes to transfer fragmentTransaction to int

FragmentManager fragmentManager = getFragmentManager();   
FragmentTransaction fragmentTransaction = fragmentManager 
            .beginTransaction().replace(R.id.l, fragment).commit();

Upvotes: 0

Views: 1090

Answers (4)

Shadow Droid
Shadow Droid

Reputation: 1696

FragmentManager fragmentManager = getFragmentManager();   
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction()
fragmentTransaction.replace(R.id.l, fragment);

Android Studio say me that fragmentTransaction dont have this method

In the above section you are missing ; after beginTransacton() so please add that. Also make sure you have View R.id.l and fragment of type Fragment bcoz method definition is as follows replace(int containerViewId, Fragment fragment) Alternatively you can use replace(int containerViewId, Fragment fragment, String tag)
For more info refer doc

Coming to other Question

FragmentManager fragmentManager = getFragmentManager();   
FragmentTransaction fragmentTransaction = fragmentManager 
            .beginTransaction().replace(R.id.l, fragment).commit();

When i do something like this i am having error that commit() return int and AS proposes to transfer fragmentTransaction to int

commit is method with FragmentTransaction who's return type is int you can refer it's signature here So you can do 

int commitValue = = fragmentManager 
                 .beginTransaction().replace(R.id.l, fragment).commit();

Also make sure you with Fragment and FragmentManager both belong to same package either are from android.app.* OR both are from android.support.v4.app.* that is support library

Upvotes: 1

FrancescoAzzola
FrancescoAzzola

Reputation: 2654

You have simply to do:

    FragmentManager fm = getFragmentManager();
    FragmentTransaction ft = fm.beginTransaction();

    ft.replace(R.id.l, fragment);
    ft.commit();

that's all. Hope it helps you!

Upvotes: 0

tknell
tknell

Reputation: 9047

In the first two snippets, you are missing the commit() on the transaction, so nothing is replaced.

The last one is mostly correct, just don't expect the method to return a FragmentTransaction. This should work:

FragmentManager fragmentManager = getFragmentManager();   
fragmentManager.beginTransaction().replace(R.id.l, fragment).commit();

Upvotes: 0

Jon
Jon

Reputation: 9803

Try 

getFragmentManager().beginTransaction().replace(R.id.l, fragment).commit();

Upvotes: 0

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