Android bundle is null after replacing fragment - android-fragments

Question

I have two fragments which are VolleyFragment and AnotherFragment, setting VolleyFragment as the initial fragment. In this fragment, the bundle data is displaying ok. However, when I go to AnotherFragment, the app crashes. It says this error:
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String[] android.os.Bundle.getStringArray(java.lang.String)' on a null object reference
at com.example.rendell.volleyfragment.AnotherFragment.onCreateView(AnotherFragment.java:28)
MainActivity
public class MainActivity extends AppCompatActivity {
public static final String JSON_URL = "http://192.168.0.102/musicmania/music/getMF";
TextView id,name,email;
String[] ids, names, emails;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
id = (TextView) findViewById(R.id.id);
name = (TextView) findViewById(R.id.name);
email = (TextView) findViewById(R.id.email);
sendRequest();
}
private void sendRequest(){
StringRequest stringRequest = new StringRequest(JSON_URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
showJSON(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MainActivity.this, error.getMessage(), Toast.LENGTH_LONG).show();
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
private void showJSON(String json){
ParseJSON pj = new ParseJSON(json);
pj.parseJSON();
id.setText(ParseJSON.ids[0]);
name.setText(ParseJSON.titles[0]);
email.setText(ParseJSON.artists[0]);
FragmentManager fragmentTransaction = getFragmentManager();
android.app.FragmentTransaction transaction = fragmentTransaction.beginTransaction();
VolleyFragment squadFragment = new VolleyFragment();
AnotherFragment anotherFragment = new AnotherFragment();
Bundle bundle = new Bundle();
bundle.putStringArray("id", ParseJSON.ids);
bundle.putStringArray("name", ParseJSON.titles);
bundle.putStringArray("email", ParseJSON.artists);
squadFragment.setArguments(bundle);
anotherFragment.setArguments(bundle);
transaction.replace(R.id.containerView, squadFragment);
transaction.commit();
}
public void changeFragment(View view) {
FragmentManager fragmentTransaction = getFragmentManager();
android.app.FragmentTransaction transaction = fragmentTransaction.beginTransaction();
AnotherFragment anotherFragment = new AnotherFragment();
transaction.replace(R.id.containerView, anotherFragment);
transaction.commit();
}
}
VolleyFragment
public class VolleyFragment extends Fragment {
TextView id,name,email;
String[] ids,names,emails;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.volley_fragment, container, false);
id = (TextView) view.findViewById(R.id.id);
name = (TextView) view.findViewById(R.id.name);
email = (TextView) view.findViewById(R.id.email);
ids = getArguments().getStringArray("id");
names = getArguments().getStringArray("name");
emails = getArguments().getStringArray("email");
//jsonArray.setIds(id);
id.setText(/*jsonArray.getIds()*/ids[0]);
name.setText(names[0]);
email.setText(emails[0]);
return view;
}
}
AnotherFragment
public class AnotherFragment extends Fragment {
TextView id,name,email;
String[] ids,names,emails;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.another_fragment, container, false);
id = (TextView) view.findViewById(R.id.id);
name = (TextView) view.findViewById(R.id.name);
email = (TextView) view.findViewById(R.id.email);
ids = getArguments().getStringArray("id");
names = getArguments().getStringArray("name");
emails = getArguments().getStringArray("email");
//jsonArray.setIds(id);
id.setText(/*jsonArray.getIds()*/ids[0]);
name.setText(names[0]);
email.setText(emails[0]);
return view;
}
}

Answer 1

I'm having trouble following exactly what you're doing here, but I see a number of problems:
In showJSON, you new up a ParseJSON object and assign it to pj, but never make use of pj. Instead you reach statically into ParseJSON for the values to populate a Bundle. That seems really odd. I'd expect the pj instance to contain the data.
Typically one does not "new" up a fragment. The usual pattern is to use a static builder in the class of the fragment itself.
You're passing the same Bundle to two different fragments. Unless you know for a fact that's OK, try instead using a different Bundle for each one.
in showJSON, your AnotherFragment instance doesn't seem to be used at all
I don't see any place where changeFragment is called
You're passing string arrays in the Bundle, but you only ever use the first element in the array in the fragment. Consider just passing a single string instead?