java - 我想从 viewpager 中的片段中获取 EditText 的所有值并想在活动中使用它们？

Question

下面是我想从中获取值的片段类，但它给了我错误。

 @Nullable
        @Override
        public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
            rootView = inflater.inflate(R.layout.fragment_register_company, container, false);

            bindViews();


            return rootView;
        }

        private void bindViews() {
            companyName = rootView.findViewById(R.id.companyName);
            compAddress1 = rootView.findViewById(R.id.compAddress1);
            compAddress2 = rootView.findViewById(R.id.compAddress2);
            compCountry = rootView.findViewById(R.id.compCountry);
            compState = rootView.findViewById(R.id.compState);
            compCity = rootView.findViewById(R.id.compCity);
            compWebsite = rootView.findViewById(R.id.compWebsite);
            compEmail = rootView.findViewById(R.id.compEmail);
            compPhone = rootView.findViewById(R.id.compPhone);

        }

        public HashMap<String, String> getCompanyDetails() {

            companyNameString = companyName.getText().toString();
            compAddress1String = compAddress1.getText().toString();
            compAddress2String = compAddress2.getText().toString();
            compCountryString = compCountry.getText().toString();
            compStateString = compState.getText().toString();
            compCityString = compCity.getText().toString();
            compWebsiteString = compWebsite.getText().toString();
            compEmailString = compEmail.getText().toString();
            compPhoneString = compPhone.getText().toString();


            HashMap<String, String> map = new HashMap<>();
            map.put("companyNameString", companyNameString);
            map.put("compAddress1String", compAddress1String);
            map.put("compAddress2String", compAddress2String);
            map.put("compCountryString", compCountryString);
            map.put("compStateString", compStateString);
            map.put("compCityString", compCityString);
            map.put("compWebsiteString", compWebsiteString);
            map.put("compEmailString", compEmailString);
            map.put("compPhoneString", compPhoneString);

            return map;

        }

这是我试图从中获取值的主要活动中的函数。

 private void collectData() {


        HashMap<String, String> compMap= new RegisterCompanyFragment().getCompanyDetails();



        companyNameString = compMap.get("companyNameString");
        compAddress1String = compMap.get("compAddress1String");
        compAddress2String = compMap.get("compAddress2String");
        compCountryString = compMap.get("compCountryString");
        compStateString = compMap.get("compStateString");
        compCityString = compMap.get("compCityString");
        compWebsiteString = compMap.get("compWebsiteString");
        compEmailString = compMap.get("compEmailString");
        compPhoneString = compMap.get("compPhoneString");




    }

这是错误，我猜这个错误是因为编辑文本没有绑定到视图，我仍然在尝试使用它。因此，请通过提供一种从片段中访问编辑文本值的方法来帮助我解决这个问题。欲了解更多信息，请在下面发表评论。谢谢你。

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.jagmad.jhea, PID: 30128
                  java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference
                      at com.jagmad.jhea.Registration.RegisterCompanyFragment.getCompanyDetails(RegisterCompanyFragment.java:75)
                      at com.jagmad.jhea.Registration.CompanyRegistration.collectData(CompanyRegistration.java:186)
                      at com.jagmad.jhea.Registration.CompanyRegistration.onOptionsItemSelected(CompanyRegistration.java:139)
                      at android.app.Activity.onMenuItemSelected(Activity.java:3208)
                      at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:407)
                      at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:195)
                      at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:108)
                      at android.support.v7.app.AppCompatDelegateImplV9.onMenuItemSelected(AppCompatDelegateImplV9.java:674)
                      at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822)
                      at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:171)
                      at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:973)
                      at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:963)
                      at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:624)
                      at android.support.v7.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:150)
                      at android.view.View.performClick(View.java:5612)
                      at android.view.View$PerformClick.run(View.java:22288)
                      at android.os.Handler.handleCallback(Handler.java:751)
                      at android.os.Handler.dispatchMessage(Handler.java:95)
                      at android.os.Looper.loop(Looper.java:154)
                      at android.app.ActivityThread.main(ActivityThread.java:6123)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)

标签： javaandroidandroid-fragmentsandroid-edittext