在两个片段之间传递数据

Question

I want to pass data between two Fragment I am adding this method to the Fragment whose sending data.

 public void sendData(){
    //Put the value
        FragmentA fragmentA = new 
        FragmentA ();

        String tag = data.TAGS;
        Bundle bundle = new Bundle();

        bundle.putString("TAG", tag);
        fragmentA.setArguments(bundle);
        //Inflate the fragment
        FragmentManager fragmentManager=getFragmentManager();
        fragmentManager.beginTransaction()
            .add(R.id.container, fragmentA)
            .addToBackStack(null)
            .commit();
}

and in the Fragment which recieve information I am adding this code into the onCreateView

                String tag = getArguments().getString("TAG");
                Log.d("valeur", "valeur=" + tag);

the problem is that I am getting data with LOGGer but the app crached and I have this message in the getString method,

Exception: Attempt to invoke virtual method 'java.lang.String 
android.os.Bundle.getString(java.lang.String)' on a null object reference

Answer 1

SOLUTION:

if(getArguments()!=null){

// log your data here

}

Answer 2

You Made Mistake in setArgument

Here is Your Modified code

Bundle bundle = new Bundle();
bundle.putString("TAG", tag);
FragmentManager fragmentManager=getFragmentManager();
//You need to put setArgument Here
fragmentA.setArguments(bundle);
fragmentManager.beginTransaction()
.add(R.id.container, fragmentA)
.addToBackStack(null)
.commit();

And at your receiving fragment You need to check getArgument whether it is fillup with values or not in onCreateView() method

if(getArgument != null){
String tag = getArguments().getString("TAG");
}