当一次仅将 1 个项目添加到列表视图时，我的列表视图运行良好。但是当添加多个项目时，listview 中的侦听器无法正常工作。谁能指导我在这里做错了什么？谢谢。
这是我的列表视图代码：
public class Participant extends ListFragment implements OnClickListener{
Intent intent;
TextView friendId;
Button addparticipant;
String eventId;
ListView lv;
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
EventController controller = new EventController(getActivity());
HashMap<String, String> queryValues = new HashMap<String, String>();
Intent objIntent = getActivity().getIntent();
eventId = objIntent.getStringExtra("eventId");
queryValues.put("eventId", eventId);
ArrayList<HashMap<String, String>> friendList = controller
.getAllFriends(queryValues);
if (friendList.size() != 0) {
lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
friendId = (TextView) view.findViewById(R.id.friendId);
String valFriendId = friendId.getText().toString();
Intent objIndent = new Intent(getActivity(),
EventPage.class);
objIndent.putExtra("friendId", valFriendId);
startActivity(objIndent);
}
});
lv.setOnItemLongClickListener(new OnItemLongClickListener(){
@Override
public boolean onItemLongClick(AdapterView<?> arg0,
View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
friendId = (TextView) arg1.findViewById(R.id.friendId);
registerForContextMenu(getListView());
return false;
}
});
SimpleAdapter adapter = new SimpleAdapter(getActivity(),
friendList, R.layout.view_friend_entry, new String[] {
"friendId", "friendName", "friendSpending" },
new int[] { R.id.friendId, R.id.friendName,
R.id.friendSpending });
adapter.notifyDataSetChanged();
setListAdapter(adapter);
}
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.participant, container, false);
addparticipant = (Button) rootView.findViewById(R.id.addpart);
addparticipant.setOnClickListener(this);
return rootView;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent objIntent = new Intent(getActivity(),
AddParticipant.class);
objIntent.putExtra("eventId", eventId);
startActivity(objIntent);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
String[] menuItems = getResources().getStringArray(R.array.menu);
for (int i = 0; i < menuItems.length; i++) {
menu.add(Menu.NONE, i, i, menuItems[i]);
}
}
@Override
public boolean onContextItemSelected(MenuItem item) {
int menuItemIndex = item.getItemId();
EventController controller = new EventController(getActivity());
switch (menuItemIndex) {
case 0:
String valFriendId = friendId.getText().toString();
Intent objIndent = new Intent(getActivity(),
EditParticipant.class);
objIndent.putExtra("friendId", valFriendId);
startActivity(objIndent);
break;
case 1:
String valFriendId2 = friendId.getText().toString();
controller.deleteFriend(valFriendId2);
Intent broadcastIntent = new Intent();
broadcastIntent.setAction(UpdateReceiver.NEW_UPDATE_BROADCAST);
broadcastIntent.addCategory(Intent.CATEGORY_DEFAULT);
getActivity().sendBroadcast(broadcastIntent);
onResume();
}
return true;
}
@Override
public void onResume() {
super.onResume();
if (getListView() != null) {
updateData();
}
}
private void updateData() {
EventController controller = new EventController(getActivity());
HashMap<String, String> queryValues = new HashMap<String, String>();
Intent objIntent = getActivity().getIntent();
eventId = objIntent.getStringExtra("eventId");
queryValues.put("eventId", eventId);
SimpleAdapter adapter = new SimpleAdapter(getActivity(),
controller.getAllFriends(queryValues),
R.layout.view_friend_entry, new String[] { "friendId",
"friendName", "friendSpending" }, new int[] {
R.id.friendId, R.id.friendName, R.id.friendSpending });
setListAdapter(adapter);
}
在这里，我将项目添加到 listView：
public class AddParticipant extends Activity implements OnClickListener {
private static final int REQUEST_CODE_PICK_CONTACTS = 1;
private static final String TAG = AddParticipant.class.getSimpleName();
private Uri uriContact;
private String contactID;
EditText friendName;
EditText friendNumber;
EditText friendEmail;
EventController controller = new EventController(this);
Button btnadd;
Button addcontact;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.addparticipant);
friendName = (EditText) findViewById(R.id.friendName);
friendNumber = (EditText) findViewById(R.id.friendNumber);
friendEmail = (EditText) findViewById(R.id.friendEmail);
btnadd = (Button) findViewById(R.id.saveButton);
btnadd.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
HashMap<String, String> queryValues = new HashMap<String, String>();
Intent objIntent = getIntent();
String eventId = objIntent.getStringExtra("eventId");
queryValues.put("eventId", eventId);
queryValues.put("friendName", friendName.getText().toString());
queryValues.put("friendNumber", friendNumber.getText()
.toString());
queryValues
.put("friendEmail", friendEmail.getText().toString());
controller.insertFriend(queryValues);
callHomeActivity(v);
finish();
}
});
addcontact = (Button) findViewById(R.id.fromcontact);
addcontact.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivityForResult(new Intent(Intent.ACTION_PICK,
ContactsContract.Contacts.CONTENT_URI),
REQUEST_CODE_PICK_CONTACTS);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_PICK_CONTACTS
&& resultCode == RESULT_OK) {
Log.d(TAG, "Response: " + data.toString());
uriContact = data.getData();
retrieveContactName();
retrieveContactNumber();
retrieveContactEmail();
}
}
private void retrieveContactNumber() {
String contactNumber = null;
// getting contacts ID
Cursor cursorID = getContentResolver().query(uriContact,
new String[] { ContactsContract.Contacts._ID }, null, null,
null);
if (cursorID.moveToFirst()) {
contactID = cursorID.getString(cursorID
.getColumnIndex(ContactsContract.Contacts._ID));
}
cursorID.close();
Log.d(TAG, "Contact ID: " + contactID);
// Using the contact ID now we will get contact phone number
Cursor cursorPhone = getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
new String[] { ContactsContract.CommonDataKinds.Phone.NUMBER },
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ? AND "
+ ContactsContract.CommonDataKinds.Phone.TYPE + " = "
+ ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE,
new String[] { contactID }, null);
if (cursorPhone.moveToFirst()) {
contactNumber = cursorPhone
.getString(cursorPhone
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
}
cursorPhone.close();
Log.d(TAG, "Contact Phone Number: " + contactNumber);
friendNumber.setText(contactNumber);
}
private void retrieveContactName() {
String contactName = null;
// querying contact data store
Cursor cursor = getContentResolver().query(uriContact, null, null,
null, null);
if (cursor.moveToFirst()) {
// DISPLAY_NAME = The display name for the contact.
// HAS_PHONE_NUMBER = An indicator of whether this contact has at
// least one phone number.
contactName = cursor.getString(cursor
.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
}
cursor.close();
Log.d(TAG, "Contact Name: " + contactName);
friendName.setText(contactName);
}
private void retrieveContactEmail() {
ContentResolver contactResolver = this.getContentResolver();
Cursor emailCursor = contactResolver.query(
ContactsContract.CommonDataKinds.Email.CONTENT_URI, null,
ContactsContract.CommonDataKinds.Email.CONTACT_ID + " = ?",
new String[] { contactID }, null);
while (emailCursor.moveToNext()) {
String phone = emailCursor
.getString(emailCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
int type = emailCursor
.getInt(emailCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Email.TYPE));
String s = (String) ContactsContract.CommonDataKinds.Email
.getTypeLabel(this.getResources(), type, "");
Log.d("TAG", s + " email: " + phone);
friendEmail.setText(phone);
}
emailCursor.close();
}
public void callHomeActivity(View view) {
super.onResume();
}