我有以下课程：
public class SHConfigureContactFragment extends Fragment{
private EditText name;
private EditText description;
private EditText primaryNumber;
private EditText secondaryNumber;
private EditText email;
private EditText skype;
private Byte[] photo;
private Boolean isDualPane;
private FragmentManager fragmentManager;
private SHContactMenuFragment menuFragment;
private SHConfigureContactFragment contactFragment;
private DatabaseControllerLibrary controller;
private Contact contact;
private SHPatient patient;
private int patientId;
public View rootView;
public int selectedIndex;
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if(savedInstanceState != null) {
this.selectedIndex = savedInstanceState.getInt("SELECTED_INDEX");
this.contact = (Contact) savedInstanceState.getSerializable("CONTACT");
}
}
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putSerializable("CONTACT", contact);
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
controller = SHController.getInstance(getActivity());
patient = ((SHController) controller).getPatient();
patientId = patient.getId();
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
super.onCreateView(inflater, container, savedInstanceState);
rootView = inflater.inflate(R.layout.sh_fragment_contact_edit, container, false);
Button button = (Button) rootView.findViewById(R.id.addContactButton);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Do something in response to button click
boolean isValid = true;
// assigning IDs based on how many contacts are created. no reused IDs son!
int id = controller.getContactsCount();
id++;
String newName = name.getText().toString().trim();
String newDescription = description.getText().toString().trim();
String newPrimaryNumber = primaryNumber.getText().toString().trim();
String newSecondaryNumber = secondaryNumber.getText().toString().trim();
String newEmail = email.getText().toString().trim();
String newSkype = skype.getText().toString().trim();
if(newName.length()==0 || newName.matches(".*\\d.*")) {
name.setText("");
isValid = false;
}
if(newPrimaryNumber.length()==0) {
primaryNumber.setText("");
isValid = false;
}
if (isValid){
Contact updatedContact;
ContactConfiguration updatedConfiguration;
if (contact != null){
id = contact.getId();
}
updatedContact = new Contact(id, newName, newDescription, newPrimaryNumber, newSecondaryNumber, newEmail, newSkype, null);
updatedConfiguration = new ContactConfiguration(patientId, patientId, false, updatedContact);
if (contact == null){
controller.addContact(updatedContact, patientId);
}
else{
controller.updateContact(updatedContact, patientId);
}
}
}
});
return rootView;
}
private void setupTextFieldsByContact(Contact contact) {
name = (EditText) rootView.findViewById(R.id.editContactName);
description = (EditText) rootView.findViewById(R.id.editContactDescription);
primaryNumber = (EditText) rootView.findViewById(R.id.editContactPrimaryNumber);
secondaryNumber = (EditText) rootView.findViewById(R.id.editContactSecondaryNumber);
email = (EditText) rootView.findViewById(R.id.editContactEmail);
skype = (EditText) rootView.findViewById(R.id.editContactSkype);
if (contact != null) {
name.setText(contact.getName());
description.setText(contact.getDescription());
primaryNumber.setText(contact.getPrimaryNumber());
secondaryNumber.setText(contact.getSecondaryNumber());
email.setText(contact.getEmail());
skype.setText(contact.getSkype());
}
}
我的布局有相应的XML文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/background"
android:orientation="vertical" >
<TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="15dp"
android:text="Name"
android:textColor="@color/action_bar"
android:textSize="25sp" />
<EditText
android:id="@+id/editContactName"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@drawable/border"
android:ems="10"
android:hint="Name"
android:imeOptions="actionNext"
android:inputType="textPersonName"
android:paddingLeft="30dp"
android:paddingRight="30dp"
android:textSize="30sp" />
<TextView
android:id="@+id/description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="15dp"
android:text="Description"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/action_bar"
android:textSize="25sp" />
<EditText
android:id="@+id/editContactDescription"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@drawable/border"
android:ems="10"
android:hint="Description"
android:imeOptions="actionNext"
android:inputType="textShortMessage"
android:paddingLeft="30dp"
android:paddingRight="30dp"
android:textSize="30sp" />
<TextView
android:id="@+id/numbers"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_gravity="center"
android:layout_marginBottom="5dp"
android:layout_marginTop="15dp"
android:text="Primary and Secondary Numbers"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/action_bar"
android:textSize="25sp" />
<RelativeLayout
android:id="@+id/NumberFields"
android:layout_width="fill_parent"
android:layout_height="50dp" >
<EditText
android:id="@+id/editContactPrimaryNumber"
android:layout_width="250dp"
android:layout_height="50dp"
android:layout_marginLeft="35dp"
android:layout_weight="2"
android:background="@drawable/border"
android:ems="10"
android:gravity="center_vertical|center_horizontal"
android:hint="Primary"
android:inputType="phone"
android:paddingLeft="30dp"
android:paddingRight="30dp"
android:textSize="30sp" />
<EditText
android:id="@+id/editContactSecondaryNumber"
android:layout_width="250dp"
android:layout_height="50dp"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginRight="25dp"
android:layout_weight="1"
android:background="@drawable/border"
android:ems="10"
android:gravity="center_vertical|center_horizontal"
android:hint="Secondary"
android:inputType="phone"
android:paddingLeft="30dp"
android:paddingRight="30dp"
android:textSize="30sp" />
</RelativeLayout>
<TextView
android:id="@+id/email"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="15dp"
android:text="Email"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/action_bar"
android:textSize="25sp" />
<EditText
android:id="@+id/editContactEmail"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@drawable/border"
android:ems="10"
android:hint="Email"
android:imeOptions="actionNext"
android:inputType="textEmailAddress"
android:paddingLeft="30dp"
android:paddingRight="30dp"
android:textSize="30sp" />
<TextView
android:id="@+id/skype"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="15dp"
android:text="Skype ID"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/action_bar"
android:textSize="25sp" />
<EditText
android:id="@+id/editContactSkype"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@drawable/border"
android:ems="10"
android:hint="Skype ID"
android:imeOptions="actionNext"
android:paddingLeft="30dp"
android:paddingRight="30dp"
android:textSize="30sp" />
<Button
android:id="@+id/addContactButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginTop="30dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:background="@drawable/sh_button_selector"
android:padding="@dimen/padding_medium"
android:text="Save Contact"
android:textColor="@color/text_white"
android:textSize="@dimen/text_size_take_survey_button"
android:textStyle="bold" />
</LinearLayout>
</ScrollView>
</LinearLayout>
现在当我运行我的应用程序时，我在onClick中的onCreateView（）中得到一个NullPointerException：
String newName = name.getText().toString().trim();
现在我已经尝试打印出变量，调试但我似乎无法弄清楚为什么会出现NullPointerException。这可能是一件简单的事情，我忽略了，我已经看了很长时间，我可能只是疯了。
答案 0 :(得分：5)
我认为您的EditText'名称'未初始化。
答案 1 :(得分：2)
您尚未初始化EditText，因此您获得了NPE。首先初始化这些组件..通过代码调用setupTextFieldsByContact()中的onCreate方法，它将解决您的问题。
答案 2 :(得分：1)
当然你得到一个NullPointerException ......你从未在onCreate方法中初始化你的EditTexts。将此添加到您的onCreate：
name = (EditText) findViewById(R.id.editContactName);
description = (EditText) findViewById(R.id.editContactDescription);
primaryNumber = (EditText) findViewById(R.id.editContactPrimaryNumber);
secondaryNumber = (EditText) findViewById(R.id.editContactSecondaryNumber);
email = (EditText) findViewById(R.id.editContactEmail);
skype = (EditText) findViewById(R.id.editContactSkype);
这样你就可以在实际存在的对象上调用方法。
答案 3 :(得分：0)
您的EditText＆＃39;名称＆＃39;未初始化。你必须首先初始化你的EditText