我的疑问是我需要保留listview项目，即使在我的片段中按下后让我解释我的完整概率我有片段名称frag＆＃34; a＆＃34;附加到该片段内的活动的另一个片段叫做frag＆＃34; b＆＃34; 。需要在片段a中动态填充listview来自片段b数据动态我可以在frag a中填充listview但是当我从frag中按回来时，所有缺少的列表项目不知道该做什么是我的代码：
片段B（From_frag）：
package first.service.precision.servicefirst;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import java.util.ArrayList;
import java.util.List;
/**
* Created by 4264 on 20-11-2015.
*/
public class NewContacts extends Fragment {
EditText first_name,jobtitle,bussiness_phone,email,mobile,address_one,postal_code;
Spinner gender_spinner,method_of_contact,state,city1;
ContactView contactView=new ContactView();
ContactSpinnerItem contactSpinnerItem;
ArrayList<ContactView>contactViews;
Button save;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
final Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_new_contacts, container, false);
first_name=(EditText)rootView.findViewById(R.id.first_name);
jobtitle=(EditText)rootView.findViewById(R.id.jobtitle);
bussiness_phone=(EditText)rootView.findViewById(R.id.businsphn);
email=(EditText)rootView.findViewById(R.id.email_contact);
mobile=(EditText)rootView.findViewById(R.id.mobnum);
address_one=(EditText)rootView.findViewById(R.id.addrss1_contact);
postal_code=(EditText)rootView.findViewById(R.id.postal_contact);
//spinners
gender_spinner=(Spinner)rootView.findViewById(R.id.gender);
method_of_contact=(Spinner)rootView.findViewById(R.id.cntct_contact);
state=(Spinner)rootView.findViewById(R.id.state_contact);
city1=(Spinner)rootView.findViewById(R.id.city_contact);
save =(Button)rootView.findViewById(R.id.btncontactsave);
save.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
contact_textbox();
contact_spinner();
Contactss contactss;
contactss=(Contactss)getFragmentManager().findFragmentByTag("contact");
// contactViews=new ArrayList<ContactView>();
contactss.updatelist(contactView);
getActivity().getFragmentManager().popBackStack();
}
});
return rootView;
}
public void contact_textbox(){
contactView.setFirst_name(first_name.getText().toString());
contactView.setJob_title(jobtitle.getText().toString());
contactView.setBusiness_phone(bussiness_phone.getText().toString());
contactView.setEmail(email.getText().toString());
contactView.setMobile(mobile.getText().toString());
contactView.setAddrs_1(address_one.getText().toString());
contactView.setPostal_code(postal_code.getText().toString());
}
public void contact_spinner(){
List<ContactSpinnerItem>gender=new ArrayList<ContactSpinnerItem>();
gender.add(new ContactSpinnerItem("Male",1));
gender.add(new ContactSpinnerItem("Female",2));
List<ContactSpinnerItem>methodofcontact=new ArrayList<ContactSpinnerItem>();
methodofcontact.add(new ContactSpinnerItem("Fax",1));
methodofcontact.add(new ContactSpinnerItem("Phone",2));
methodofcontact.add(new ContactSpinnerItem("Email",3));
methodofcontact.add(new ContactSpinnerItem("Other",4));
List<ContactSpinnerItem>state_spinner=new ArrayList<ContactSpinnerItem>();
state_spinner.add(new ContactSpinnerItem("TamilNadu",1));
state_spinner.add(new ContactSpinnerItem("Maharashtry",2));
state_spinner.add(new ContactSpinnerItem("Karnataka",3));
List<ContactSpinnerItem>city=new ArrayList<ContactSpinnerItem>();
city.add(new ContactSpinnerItem("Chennai",1));
city.add(new ContactSpinnerItem("Banglore",2));
city.add(new ContactSpinnerItem("Mumbai", 3));
//adapter for spinner
ContactSpinnerAdapter genderadapter=new ContactSpinnerAdapter(getActivity().getBaseContext(),R.layout.spinnerlayout,gender);
gender_spinner.setAdapter(genderadapter);
ContactSpinnerAdapter method=new ContactSpinnerAdapter(getActivity().getBaseContext(),R.layout.spinnerlayout,methodofcontact);
method_of_contact.setAdapter(method);
ContactSpinnerAdapter state1=new ContactSpinnerAdapter(getActivity().getBaseContext(),R.layout.spinnerlayout,state_spinner);
state.setAdapter(state1);
ContactSpinnerAdapter citys=new ContactSpinnerAdapter(getActivity().getBaseContext(),R.layout.spinnerlayout,city);
city1.setAdapter(citys);
contactSpinnerItem=(ContactSpinnerItem)gender_spinner.getSelectedItem();
contactView.setGender(contactSpinnerItem.getContact_text());
contactView.setGender_id(contactSpinnerItem.getContact_value());
//method of contanct
contactSpinnerItem=(ContactSpinnerItem)method_of_contact.getSelectedItem();
contactView.setMethod_of_contact(contactSpinnerItem.getContact_text());
contactView.setMethod_id(contactSpinnerItem.getContact_value());
//state
contactSpinnerItem=(ContactSpinnerItem)state.getSelectedItem();
contactView.setState_conatct(contactSpinnerItem.getContact_text());
contactView.setState_id(contactSpinnerItem.getContact_value());
//city
contactSpinnerItem=(ContactSpinnerItem)city1.getSelectedItem();
contactView.setCity(contactSpinnerItem.getContact_text());
contactView.setCity_id(contactSpinnerItem.getContact_value());
}
}
这是我的片段a（To_fragment）：
package first.service.precision.servicefirst;
/**
* Created by 4264 on 23-11-2015.
*/
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.List;
/**
* Created by 4264 on 08-10-2015.
*/
public class Contactss extends android.app.Fragment implements View.OnClickListener {
public Contactss(){}
public ListView lv;
Contactss contactss;
public ContactListAdapter contactListAdapter;
List<ContactView> newContactViews;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_contacts, container, false);
lv = (ListView) rootView.findViewById(R.id.lvcontacts);
//ArrayList<NewsItem> listContact = GetlistContact();
newContactViews = new ArrayList<ContactView>();
contactListAdapter = new ContactListAdapter(getActivity(), R.id.lvcontacts, newContactViews);
//contactss= (Contactss) getFragmentManager().getFragment(savedInstanceState,"contact");
lv.setAdapter(contactListAdapter);
return rootView; }
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
//getFragmentManager().putFragment(outState,"contact",contactss);
}
public void updatelist(ContactView obj) {
newContactViews.add(obj);
contactListAdapter.notifyDataSetChanged();
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Fragment fragment=null;
Button add = (Button) getActivity().findViewById(R.id.button2);
add.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Fragment newfragmnet=new NewContacts();
FragmentTransaction ft=getFragmentManager().beginTransaction();
ft.add(R.id.content_frame,newfragmnet);
ft.addToBackStack(null);
ft.commit();
}
}
如果保留列表项目，即使背面被压缩也可以帮助我！