我有3个名为Personal_info，contact_info和professional_info的片段。当我的应用程序启动时，默认显示个人信息。在personal_info中，用户填写所有信息，当他点击“继续”按钮时，应显示下一个contact_info片段。在contact_info中，用户填写所有详细信息，当他点击继续时，professional_info应该打开。现在，在最后一个为profession_info的片段中，我调用了一个将所有信息发送到服务器的Web服务。我的问题是
1）如何从personal_info调用contact_info，因为它们都是片段。
2）如何将personal_info frag和contact_info frag中的值转换为professional_info。
MainActivity.java
public class MainActivity extends MainFragment {
private FrameLayout container;
private TextView headerid;
FragmentManager manager;
FragmentTransaction transaction;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView (R.layout.main);
initialize ();
}
private void initialize() {
container = (FrameLayout) findViewById (R.id.container);
headerid = (TextView) findViewById (R.id.header_id);
// manager=getFragmentManager ();
// transaction=manager.beginTransaction ();
// PersonalInfo info=new PersonalInfo ();
// transaction.add (R.id.container,info,"personal_info");
// transaction.commit ();
MainFragment.startFragment (new PersonalInfo (),true);
}
}
Personal_info.Java
public class PersonalInfo extends Fragment implements View.OnClickListener {
View view;
// private EditText etfirstname;
private EditText etlastname;
private Spinner spgender;
private Spinner spage;
private Spinner spnationality;
private Spinner sprelegion;
private Button btcontinue1;
private LinearLayout personalinfo;
private static String first_name, last_name, gender, age, nationality, religion;
private String[] gender_array;
private ArrayAdapter<String> gender_str;
private Context c = getActivity ();
private String[] religion_array;
private ArrayAdapter<String> religion_str;
private String[] state_array;
private ArrayAdapter<String> state_str;
private String[] age_array;
private ArrayAdapter<String> age_str;
private String[] nationality_array;
private ArrayAdapter<String> nationality_str;
private String str_gender;
private String[] gender_code;
private String str_religion, gender_id, religion_id;
private String[] religion_code;
private String str_age;
private String age_substring;
private String str_nationality;
private String[] nationality_code;
private String nationality_id;
private Button btcontinue1;
private Spinner spgender;
private EditText etfirstname;
private EditText etlastname;
private Spinner spage;
private Spinner spnationality;
private Spinner sprelegion;
TextView header;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate (R.layout.personal_info_frag, container, false);
return view;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
initialize ();
// spinnerSetup ();
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated (savedInstanceState);
}
private void spinnerSetup() {
// gender_array = getResources ().getStringArray (R.array.Gender);
// Arrays.sort (gender_array, 1, gender_array.length);
// //gender_str = new ArrayAdapter<String> (c, R.layout.textview_spinner, gender_array);
// gender_str.setDropDownViewResource (android.R.layout.simple_dropdown_item_1line);
// spgender.setAdapter (gender_str);
religion_array = getResources ().getStringArray (R.array.Religion);
Arrays.sort (religion_array, 1, religion_array.length);
religion_str = new ArrayAdapter<String> (c, R.layout.textview_spinner, religion_array);
religion_str.setDropDownViewResource (android.R.layout.simple_dropdown_item_1line);
sprelegion.setAdapter (religion_str);
age_array = getResources ().getStringArray (R.array.Age);
Arrays.sort (age_array, 1, age_array.length);
age_str = new ArrayAdapter<String> (c, R.layout.textview_spinner, age_array);
age_str.setDropDownViewResource (android.R.layout.simple_dropdown_item_1line);
spage.setAdapter (age_str);
nationality_array = getResources ().getStringArray (R.array.Nationality);
nationality_str = new ArrayAdapter<String> (c, R.layout.textview_spinner, nationality_array);
nationality_str.setDropDownViewResource (android.R.layout.simple_dropdown_item_1line);
spnationality.setAdapter (nationality_str);
}
// private void initialize() {
//
// etfirstname = (EditText) view.findViewById (R.id.et_first_name);
// etlastname = (EditText) view.findViewById (R.id.et_last_name);
// spgender = (Spinner) view.findViewById (R.id.sp_gender);
// spage = (Spinner) view.findViewById (R.id.sp_age);
// spnationality = (Spinner) view.findViewById (R.id.sp_nationality);
// sprelegion = (Spinner)view.findViewById (R.id.sp_relegion);
// btcontinue1 = (Button) view.findViewById (R.id.bt_continue_1);
// btcontinue1.setOnClickListener (this);
// }
@Override
public void onClick(View view) {
first_name = etfirstname.getText ().toString ();
last_name = etlastname.getText ().toString ();
str_gender = (String) spgender.getSelectedItem ();//gender value
gender_code = getResources ().getStringArray (R.array.Gender_id);
gender_id = gender_code[spgender.getSelectedItemPosition ()];// gender code
//for religion
str_religion = (String) sprelegion.getSelectedItem ();
religion_code = getResources ().getStringArray (R.array.Religion_Code);
religion_id = religion_code[sprelegion.getSelectedItemPosition ()];
str_age = (String) spage.getSelectedItem ();
age_substring = str_age.substring (0, 2).trim ();
//for nationality
str_nationality = (String) spnationality.getSelectedItem ();
nationality_code = getResources ().getStringArray (R.array.Nationality_code);
nationality_id = nationality_code[spnationality.getSelectedItemPosition ()];
}
MainFragment.Java
public class MainFragment extends Activity {
Context mContext;
public static FragmentManager fManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initialize();
}
private void initialize() {
mContext = getApplicationContext();
fManager = getFragmentManager ();
}
public static void startFragment(Fragment fragment, boolean isToBackStack) {
/*
* Restricting Fragment transition if same fragment available in top of
* BackStack.
*
* If tempFragment is Null it means there is no fragment was added yet.
*/
Fragment tempFragment = fManager.findFragmentById(R.id.container);
if (tempFragment != null && tempFragment.getClass().getName().equals(fragment.getClass().getName())) {
return;
}
/*
* Actual transition of Fragment
*/
FragmentTransaction fragt = fManager.beginTransaction();
// fragt.setCustomAnimations(android.R.anim.slide_out_right,android.R.anim.slide_in_left);
fragt.replace(R.id.container, fragment);
// hide background fragment
fragt.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
if (isToBackStack)
fragt.addToBackStack(fragment.getClass().getName());
fragt.commit();
}
}
答案 0 :(得分：1)
就个人而言，我更愿意让创建片段的活动成为促进沟通的活动。
如果我们有一个活动A，我让它实现一个可以被片段使用的接口。当片段完成并想要发送数据时，它会调用接口上的活动。然后是活动打开下一个片段并为其提供所需的值。
可能是这样的：
interface InformationInterface {
public void informationGathered(Map<String,String> personalInformation);
}
public class MainActivity extends Activity implements InformationInterface {
...lifeCycleMethods...
public void informationGathered(Map<String,String> personalInformation) {
//Start the next fragment, giving it the personalInformation
}
}
//Then in the fragment, we get the interface of the activity
public class PersonalInfoFragment extends Fragment {
private InformationInterface callback;
...lifecycleMethods...
public void onAttach(Activity activity) {
super.onAttach(activity);
if (activity instanceof InformationInterface) {
this.callback = (InformationInterface)activity;
} else {
throw new IllegalArgumentException("Activity doesn't have InformationInterface");
}
}
private void next() {
//Called when user presses next
callback.informationGathered(...map with required values...);
}
这种方式接口不需要彼此了解，活动负责它们之间的所有通信。
http://developer.android.com/guide/components/fragments.html