How to call fragment method from main activity

java android android-fragments android-activity fragmentmanager

First create an interface

public interface MyInterface{    void myAction() ;}

Your fragment must implement this interface.

public MyFragment extends Fragment implements MyInterface

In your activity, define a field of type MyInterface :

  private MyInterface listener ;  public void setListener(MyInterface listener)  {     this.listener = listener ;  }

When creating your fragment and adding it :

setListener(myFragment);

Finally, when the condtion happens that you want to call the Fragment method, just call :

listener.myAction() ; // this will call the implementation in your MyFragment class.

java android android-fragments android-activity fragmentmanager

it means your calling a fragment method

((YourFragmentClass) fragment).Yourmethod();

java android android-fragments android-activity fragmentmanager

To better explain the answer by user5466222 :

YourFragmentClass fragment = new YourFragmentClass();((YourFragmentClass) fragment).yourmethod();

CodeHunter