我总是在片段类的下面一行获取searchView null：
SearchView searchView =（SearchView）MenuItemCompat.getActionView（searchItem）;
这是我的片段类，请在底部找到onCreateOptionsMenu方法：
public class FriendsListActivity extends Fragment implements EventListener {
ArrayList<Users> friendList = new ArrayList<Users>();
ArrayList<Users> blockedList = new ArrayList<Users>();
ArrayList<Users> famliyList = new ArrayList<Users>();
ArrayList<Users> newContactList = new ArrayList<Users>();
ArrayList<JSONObject> finalContactList = new ArrayList<JSONObject>();
ArrayList<JSONObject> modifiedContactList = new ArrayList<JSONObject>();
static int count;
private Menu optionsMenu;
private DBHelper mydb ;
Map<String , String> dbContectMap;
SocketOperator socket;
boolean isGetResult = false;
List<String> mobileList = new ArrayList<String>();
JSONObject changeCategoryJobj = new JSONObject();
CutsomAdapter customFriendListAdapter;
String headerpixurl = "images/b58a34f2-ec57-494f-821e-09ecf584449e/profileImage/stickyHeader/82508da9-bf53-488f-a09b-3bb250cc1bd2.PNG";
String startCategory;
String lastCategory = "start";
int isHeader = 0;
ListView lv1;
private boolean isActivityInitialized = false;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
FragmentActivity faActivity = (FragmentActivity) super.getActivity();
// main layout which contains list
LinearLayout llLayout = (LinearLayout) inflater.inflate(R.layout.friends_activity_main, container, false);
//sqlite DB
mydb = new DBHelper(FriendsListActivity.super.getActivity());
dbContectMap = mydb.getAllCotacts();
socket = new SocketOperator(this);
fetchContactsFromPhone();// from phone
int count = 0;
try {
while(!isGetResult && count <= 6){
Thread.sleep(5000);
count++;
}
} catch (InterruptedException e) {
e.printStackTrace();
}
//fetchContactsFromServer(mobileList);
// friends_activity_list_row_layout , represents one item in list view
customFriendListAdapter = new CutsomAdapter(FriendsListActivity.super.getActivity().getApplicationContext(),
R.layout.friends_activity_list_row_layout , finalContactList );
// this will be list which conain items
lv1= (ListView) llLayout.findViewById(R.id.friends_activity_custom_list);
lv1.setStackFromBottom(false);
lv1.setAdapter(customFriendListAdapter);
setHasOptionsMenu(true);
setupActionBar();
isActivityInitialized = true;
return llLayout;
}
// give a delete button to remove permanatly from list
// same code is in LoginActivity, when ever change here also code review the LoginActivity code too
public void fetchContactsFromPhone() {
String phoneNumber = null;
String email = null;
Uri CONTENT_URI = ContactsContract.Contacts.CONTENT_URI;
String _ID = ContactsContract.Contacts._ID;
String DISPLAY_NAME = ContactsContract.Contacts.DISPLAY_NAME;
String HAS_PHONE_NUMBER = ContactsContract.Contacts.HAS_PHONE_NUMBER;
Uri PhoneCONTENT_URI = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
String Phone_CONTACT_ID = ContactsContract.CommonDataKinds.Phone.CONTACT_ID;
String NUMBER = ContactsContract.CommonDataKinds.Phone.NUMBER;
Uri EmailCONTENT_URI = ContactsContract.CommonDataKinds.Email.CONTENT_URI;
String EmailCONTACT_ID = ContactsContract.CommonDataKinds.Email.CONTACT_ID;
String DATA = ContactsContract.CommonDataKinds.Email.DATA;
//StringBuffer output = new StringBuffer();
ContentResolver contentResolver = FriendsListActivity.super.getActivity().getContentResolver();
Cursor cursor = contentResolver.query(CONTENT_URI, null, null, null,
null);
// Loop for every contact in the phone
if (cursor.getCount() > 0) {
while (cursor.moveToNext()) {
String contact_id = cursor
.getString(cursor.getColumnIndex(_ID));
String name = cursor.getString(cursor
.getColumnIndex(DISPLAY_NAME));
int hasPhoneNumber = Integer.parseInt(cursor.getString(cursor
.getColumnIndex(HAS_PHONE_NUMBER)));
if (hasPhoneNumber > 0) {
// Query and loop for every phone number of the contact
Cursor phoneCursor = contentResolver.query(
PhoneCONTENT_URI, null, Phone_CONTACT_ID + " = ?",
new String[] { contact_id }, null);
while (phoneCursor.moveToNext()) {
phoneNumber = phoneCursor.getString(phoneCursor
.getColumnIndex(NUMBER));
// output.append("\n Phone number:" + phoneNumber);
}
phoneCursor.close();
Users user = new Users();
user.name = name;
user.mobileNumber = phoneNumber;
//friendList.add(user);
// check if this user/phone number is already added to server friendList
if( !dbContectMap.containsKey(phoneNumber)){
mobileList.add(phoneNumber);
}
}
}
// outputText.setText(output);
}
// send to server and update mydb
try {
JSONObject jsonObj = new JSONObject();
jsonObj.put("action", "addNewContactInFriendList");
jsonObj.put("userid", MyData.getMyDataInstance().getString(MyData.USERID));
JSONArray mobileListArray = new JSONArray(mobileList);
jsonObj.put("mobileList", mobileListArray);
socket.sendMessage(jsonObj);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* The Class CutsomAdapter is the adapter class for Activity ListView. The
* currently implementation of this adapter simply display static dummy
* contents. You need to write the code for displaying actual contents.
*/
private class CutsomAdapter extends ArrayAdapter<JSONObject> implements
PinnedSectionListAdapter, Filterable {
private LayoutInflater layoutInflater;
private Context context;
List<Users> userList;
String radioGroupType;
private OnCustomClickListener callback;
int itemListSize = 0;
ArrayList<JSONObject> listData;
ArrayList<JSONObject> tempListData;
private FriendsFilter friendsFilter;
public CutsomAdapter(Context context, int textViewResourceId, ArrayList<JSONObject> finalArrayList) {
super(context, textViewResourceId, finalArrayList);
layoutInflater = LayoutInflater.from(context);
this.context = context;
this.listData = finalArrayList;
this.tempListData = finalArrayList;
}
View convertView = null;
class ViewHolder {
ImageView headerImage;
TextView name;
TextView mobile;
RadioGroup radioCategory;
RadioButton radioButton;
}
class HeaderViewHolder {
TextView categoryName;
}
public void setContext(Context context) {
this.context = context;
}
@Override
public int getCount() {
itemListSize = listData.size();
return listData.size();
}
public void setListData(List<JSONObject> list) {
this.listData = (ArrayList<JSONObject>) list;
}
@Override
public JSONObject getItem(int position) {
return listData.get(position);
}
@Override
public boolean isItemViewTypePinned(int viewType) {
boolean toBePinned = false;
if (viewType == 1)
toBePinned = true;
// System.out.println("toBePinned: "+toBePinned);
return toBePinned;
}
@Override
public int getItemViewType(int position) {
JSONObject jo = this.listData.get(position);
int k = 0;
isHeader = 0;
try {
String header = jo.getString("headerStr");
if(header != null && "headerStr".equalsIgnoreCase("headerStr")){
k=1;
isHeader = 1;
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return k;
}
@Override
public int getViewTypeCount() {
return 2;
}
/*
* (non-Javadoc)
*
* @see android.widget.Adapter#getItemId(int)
*/
@Override
public long getItemId(int arg0) {
return arg0;
}
/*
* (non-Javadoc)
*
* @see android.widget.Adapter#getView(int, android.view.View,
* android.view.ViewGroup)
*/
@Override
public View getView(final int position, View convertViewx, ViewGroup parent) {
final JSONObject jObj = (JSONObject) listData.get(position);
View convertView = null;
//int isHeader = 0;
try {
//isHeader = jObj.getInt("TYPE");
String header = jObj.getString("headerStr");
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
//if (lastCategory.equalsIgnoreCase("start") || !startCategory.equalsIgnoreCase(lastCategory)) {
if(isHeader == 1){
final JSONObject jObjX = (JSONObject) listData.get(position);
convertView = layoutInflater.inflate(R.layout.friends_activity_sticky_header,
null);
final HeaderViewHolder headerViewHolder = new HeaderViewHolder();
convertView.setBackgroundColor(Color.WHITE);
headerViewHolder.categoryName = (TextView) convertView
.findViewById(R.id.header);
try {
String header = jObjX.getString("headerStr");
headerViewHolder.categoryName.setText(header);
//headerViewHolder.userProfilePic.seti();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else {
try {
final ViewHolder holder;
if (convertView == null) {
convertView = layoutInflater.inflate(
R.layout.friends_activity_list_row_layout, null);
}
holder = new ViewHolder();
holder.headerImage = (ImageView)convertView.findViewById(R.id.headerImage);
Picasso.with(context).load(MyData.SERVER_URL+jObj.getString("headerpixurl")).into(holder.headerImage);
holder.name = (TextView) convertView.findViewById(R.id.name);
holder.name.setText(jObj.getString("name"));
holder.mobile = (TextView) convertView.findViewById(R.id.mobile);
holder.mobile.setText(jObj.getString("mobile"));
if(jObj.getString("category").equalsIgnoreCase("friends")){
holder.radioButton = (RadioButton) convertView.findViewById(R.id.friend);
holder.radioButton.setChecked(true);
}else if(jObj.getString("category").equalsIgnoreCase("family")){
holder.radioButton = (RadioButton) convertView.findViewById(R.id.family);
holder.radioButton.setChecked(true);
}else if(jObj.getString("category").equalsIgnoreCase("blocked")){
holder.radioButton = (RadioButton) convertView.findViewById(R.id.block);
holder.radioButton.setChecked(true);
}else if(jObj.getString("category").equalsIgnoreCase("newuser")){
// dont do any thing let user select , which category he choose for this user
}
holder.radioCategory = (RadioGroup) convertView.findViewById(R.id.radioCategory);
holder.radioCategory.setTag(position);
holder.radioCategory.setOnCheckedChangeListener(listener);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
lastCategory = startCategory;
}
return convertView;
}
// https://stackoverflow.com/questions/28574000/fill-a-listview-with-radio-button-groups-with-an-onclick-listener-in-the-adapter
RadioGroup.OnCheckedChangeListener listener = new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int id) {
RadioButton radio = (RadioButton)radioGroup.findViewById(radioGroup.getCheckedRadioButtonId());
int index = (Integer) radioGroup.getTag();
JSONObject selected = (JSONObject) getItem(index);
try{
switch (id) {
case R.id.friend:
System.out.println("friend");
selected.put("newCategory", "friends");
modifiedContactList.add(selected);
//finalContactList.remove(index);
break;
case R.id.family:
System.out.println("family");
selected.put("newCategory", "family");
modifiedContactList.add(selected);
//finalContactList.remove(index);
break;
case R.id.block:
System.out.println("block");
selected.put("newCategory", "blocked");
modifiedContactList.add(selected);
//finalContactList.remove(index);
break;
}
}catch(Exception ex){
}
}
};
public void resetData() {
listData = tempListData ;
}
@Override
public Filter getFilter() {
if (friendsFilter == null)
friendsFilter = new FriendsFilter();
return friendsFilter;
}
// https://github.com/survivingwithandroid/Surviving-with-android/blob/master/ListView_Filter_Tutorial/src/com/survivingwithandroid/listview/SimpleList/PlanetAdapter.java
private class FriendsFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
// We implement here the filter logic
if (constraint == null || constraint.length() == 0) {
// No filter implemented we return all the list
results.values = tempListData;
results.count = tempListData.size();
}
else {
// We perform filtering operation
List<JSONObject> nPlanetList = new ArrayList<JSONObject>();
for (JSONObject p : listData) {
try {
if (p.getString("name").toUpperCase().startsWith(constraint.toString().toUpperCase()))
nPlanetList.add(p);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
results.values = nPlanetList;
results.count = nPlanetList.size();
}
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
// Now we have to inform the adapter about the new list filtered
if (results.count == 0)
notifyDataSetInvalidated();
else {
listData = (ArrayList<JSONObject>) results.values;
notifyDataSetChanged();
}
}
}
}
private void toList(List<Users> contactList, JSONArray array) throws JSONException {
int size = array.length();
for (int i = 0; i < size; i++) {
JSONObject jobj = array.getJSONObject(i);
Users user = new Users();
user.userid = jobj.getString("userid");
user.name = jobj.getString("name");
//user.category = jobj.getString("category");
user.imageURL = jobj.getString("headerpixurl");
// #### FOR TESTING
headerpixurl = jobj.getString("headerpixurl");
user.mobileNumber = jobj.getString("mobile");
contactList.add(user);
}
//return contactList;
}
// #### FOR TESTING ####
private void testing(JSONArray jArray, String category){
for (count= 0; count < 5; count++) {
try {
JSONObject jObj = new JSONObject();
jObj.put("userid", "1234"+count);
jObj.put("name", "vichi"+count);
jObj.put("mobile", "9999");
jObj.put("headerpixurl", headerpixurl);
jObj.put("category", category);
jArray.put(jObj);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
private void mergeInList(JSONArray jArray){
for(int i=0; i < jArray.length(); i++){
try {
finalContactList.add(jArray.getJSONObject(i));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
@Override
public void eventReceived(String event) throws JSONException {
// when we will get return phone number then only we will update sqlite table
final JSONObject eventJObjx = new JSONObject(event);
if(isActivityInitialized){
FriendsListActivity.super.getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
try {
intilizeContactsList(eventJObjx);
customFriendListAdapter.notifyDataSetChanged();
}catch(Exception ex){
}
}
});
}else{
intilizeContactsList(eventJObjx);
}
//mydb.insertContact(phone, "Y");
}
private void intilizeContactsList(JSONObject eventJObjx) throws JSONException{
//#### ALWAYS MAINTAIN THIS ORDER ####
finalContactList.clear();
modifiedContactList.clear();
JSONArray newuserArray = eventJObjx.getJSONArray("newuser");
if(newuserArray.length() > 0){
JSONObject jObj1 = new JSONObject();
jObj1.put("headerStr", " New User");
finalContactList.add(jObj1);
mergeInList(newuserArray);
}
JSONArray friendsArray = eventJObjx.getJSONArray("friends");
//testing(friendsArray, "friends");
if(friendsArray.length() > 0){
JSONObject jObj1 = new JSONObject();
jObj1.put("headerStr", " Friends ");
finalContactList.add(jObj1);
mergeInList(friendsArray);
}
JSONArray familyArray = eventJObjx.getJSONArray("family");
//testing(familyArray, "family");
if(familyArray.length() > 0){
JSONObject jObj1 = new JSONObject();
jObj1.put("headerStr", " Family ");
finalContactList.add(jObj1);
mergeInList(familyArray);
}
JSONArray blockedArray = eventJObjx.getJSONArray("blocked");
//testing(blockedArray, "blocked");
if(blockedArray.length() > 0){
JSONObject jObj1 = new JSONObject();
jObj1.put("headerStr", " Blocked ");
finalContactList.add(jObj1);
mergeInList(blockedArray);
}
for(int i=0; i < newuserArray.length(); i++){
//mobileToAddInFriendList.add(mobileListArray.getString(i));
mydb.insertContact(newuserArray.getJSONObject(i).getString("mobile"), "Y");
}
isGetResult = true;
}
protected void setupActionBar() {
final ActionBar actionBar = FriendsListActivity.super.getActivity().getActionBar();
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setDisplayUseLogoEnabled(true);
actionBar.setLogo(R.drawable.icon);
actionBar.setBackgroundDrawable(getResources().getDrawable(
R.drawable.actionbar_bg));
// actionBar.setDisplayHomeAsUpEnabled(true);
// actionBar.setHomeButtonEnabled(true);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
FriendsListActivity.super.getActivity().getMenuInflater().inflate(R.menu.friends_activity_menu, menu);
this.optionsMenu = menu;
super.onCreateOptionsMenu(menu, inflater);
SearchManager searchManager = (SearchManager) FriendsListActivity.super.getActivity().getSystemService(Context.SEARCH_SERVICE);
//SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
MenuItem searchItem = menu.findItem(R.id.action_search);
SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
searchView.setSearchableInfo(searchManager.getSearchableInfo(FriendsListActivity.super.getActivity().getComponentName()));
searchView.setIconifiedByDefault(false);
SearchView.OnQueryTextListener textChangeListener = new SearchView.OnQueryTextListener()
{
@Override
public boolean onQueryTextChange(String newText)
{
// this is your adapter that will be filtered
customFriendListAdapter.getFilter().filter(newText);
System.out.println("on text chnge text: "+newText);
return true;
}
@Override
public boolean onQueryTextSubmit(String query)
{
// this is your adapter that will be filtered
customFriendListAdapter.getFilter().filter(query);
System.out.println("on query submit: "+query);
return true;
}
};
searchView.setOnQueryTextListener(textChangeListener);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
super.onOptionsItemSelected(item);
switch (item.getItemId()) {
case R.id.done:
try {
JSONObject jsonObj = new JSONObject();
jsonObj.put("action", "moveContact");
jsonObj.put("userid", MyData.getMyDataInstance().getString(MyData.USERID));
JSONArray mobileListArray = new JSONArray(modifiedContactList);
jsonObj.put("modifiedList", mobileListArray);
socket.sendMessage(jsonObj);
modifiedContactList.clear();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
break;
}
return super.onOptionsItemSelected(item);
}
}
这是我的menu.xml文件
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/done"
android:icon="@drawable/ic_action_accept"
app:showAsAction="always"
android:title="@string/upload"/>
<item
android:id="@+id/action_search"
app:actionViewClass="android.support.v7.widget.SearchView"
android:icon="@drawable/ic_launcher"
app:showAsAction="always|collapseActionView"
android:maxWidth="100dp"
android:title="Search"/>
</menu>
这是日志片段：
07-23 15:18:59.015 1841-1841/com.woohoo E/AndroidRuntime? FATAL EXCEPTION: main
Process: com.woohoo, PID: 1841
java.lang.NullPointerException
at com.woohoo.FriendsListActivity.onCreateOptionsMenu(FriendsListActivity.java:797)
at android.support.v4.app.Fragment.performCreateOptionsMenu(Fragment.java:1871)
at android.support.v4.app.FragmentManagerImpl.dispatchCreateOptionsMenu(FragmentManager.java:2001)
at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:278)
at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:436)
at com.android.internal.policy.impl.PhoneWindow.doInvalidatePanelMenu(PhoneWindow.java:800)
at com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:221)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:543)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
令人惊讶的是它在Eclipse中运行良好，但在Android Studio中提供了nullpointerexception。
我已尝试使用与以下链接相同的配置： Android - NullPointerException on SearchView in Action Bar
答案 0 :(得分：0)