我在android过滤器中遇到一个问题。
首先，我搜索一些文本，并根据结果值做一个事件，然后返回活动。到那时，我的列表视图将刷新所有项目，而不是过滤后的项目。
例如： 我正在从通讯录中搜索一个联系人，它将返回一些结果。根据该结果，我将执行一些功能，然后返回到联系人列表屏幕，此时我的联系人列表会自动重置。
下面是过滤器的代码
public class ValueFilter extends Filter {
ContactsAdapter adapter;
private ArrayList<HashMap<String, Object>> mfilterList;
public ValueFilter(ArrayList<HashMap<String, Object>> filterList, ContactsAdapter adapter) {
this.adapter = adapter;
this.mfilterList = filterList;
}
//Invoked in a worker thread to filter the data according to the constraint.
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if (constraint != null && constraint.length() > 0) {
ArrayList<HashMap<String, Object>> filterListbk = new ArrayList<HashMap<String, Object>>();
for (int i = 0; i < mfilterList.size(); i++) {
String contactName = (String) mfilterList.get(i).get(Contacts.CONTACTKEY);
String contactNo = (String) mfilterList.get(i).get(Contacts.DURATION);
contactName = contactName.toLowerCase();
constraint = (CharSequence) constraint.toString().toLowerCase();
if (contactName.contains(constraint)) {
filterListbk.add(mfilterList.get(i));
}
if (contactNo.contains(constraint)) {
filterListbk.add(mfilterList.get(i));
}
results.count = filterListbk.size();
results.values = filterListbk;
}
} else {
results.count = mfilterList.size();
results.values = mfilterList;
}
return results;
}
//Invoked in the UI thread to publish the filtering results in the user interface.
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
// adapter.players= (ArrayList<Player>) results.values;
adapter.Books = (ArrayList<HashMap<String, Object>>) results.values;
String new_result = results.values.toString();
if(!new_result.equals(null)){
adapter.Books = (ArrayList<HashMap<String, Object>>) results.values;
adapter.notifyDataSetChanged();
Intent intent = new Intent();
intent.setAction(SipManager.ACTION_NO_RECORD_FOUND);
Bundle args = new Bundle();
args.putSerializable("result",(Serializable)adapter.Books);
args.putSerializable("flag","0");
intent.putExtra("BUNDLE",args);
/*intent.putExtra("flag","0");
intent.putExtra("result",adapter.Books);*/
// add data
ctx.sendBroadcast(intent);
}
if(new_result.equals("[]")){
Intent intent = new Intent();
intent.setAction(SipManager.ACTION_NO_RECORD_FOUND);
//intent.putExtra("flag","1");
Bundle args = new Bundle();
args.putSerializable("result",(Serializable)adapter.Books);
args.putSerializable("flag","1");
intent.putExtra("BUNDLE",args);
ctx.sendBroadcast(intent);
}
//adapter.Books.clear();
notifyDataSetChanged();
}
}
下面是我的代码片段
public class Contacts extends Fragment implements OnBackPressListener {
IndexFastScrollRecyclerView mRecyclerView;
private List<String> mDataArray;
public static boolean isVisible = false;
ContactsAdapter adapter;
DatabaseHelper dbHelp;
public static final String CONTACTID = "contactid";
public static final String CONTACTKEY = "contactname";
public static final String CONTACTFAV = "contactfav";
public static final String CONTACTNUM = "contactno";
public static final String DURATION = "duration";
public static final String SIP = "sip";
public static final String SIP_USER = "sip_user";
public String sip_label = "";//"Aniphones";
public String not_sip_label = "";
public int flag = 0;
public Cursor cursor;
public ArrayList<HashMap<String, Object>> myBooks;
public ArrayList<HashMap<String, Object>> myBooks1;
public ArrayList<String> ContactSimpleList;
public HashMap<String, Object> hm;
public Long id;
public String getname = "";
public DatabaseHelper dbhelp;
public SharedPreferences.Editor edit;
public TextView no_contacts;
public String contact = "";
public Phonenumber.PhoneNumber number = null;
public PhoneNumberUtil phoneUtil;
public String dynamic_table = "";
FloatingActionButton fab;
String test = "", sip_user_pref = "";
Context ctx;
String service_start;
private TextWatcher mSearchTw;
private EditText etAllContSearch;
View rootView;
public String name = "", balance = "";
public static final int PREMISSION_CONTACT_REQUEST_CODE = 1;
private Background_allcontacts mBackground_allcontacts = null;
AlertDialog spotDialog = null;
private List<AlphabetItem> mAlphabetItems;
PrefManager pref;
HashMap<String, String> credential;
GlobalClass gc;
ViewPager viewPager;
boolean isCallPlaced = true;
Object selectedItem;
boolean is_called_from_filter = false;
public ArrayList<HashMap<String, Object>> filterBook;
private BroadcastReceiver mNoRecordFound = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Extract data included in the Intent
if (intent.getAction().equals(SipManager.ACTION_NO_RECORD_FOUND)) {
Bundle args = intent.getBundleExtra("BUNDLE");
String flag = args.getString("flag");
//String flag = intent.getExtras().getString("flag");
if(flag.equals("1")){
no_contacts.setVisibility(View.VISIBLE);
}
else {
is_called_from_filter = true;
ArrayList<HashMap<String, Object>> object = (ArrayList<HashMap<String, Object>>) args.getSerializable("result");
filterBook = object;
no_contacts.setVisibility(View.INVISIBLE);
}
}
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setHasOptionsMenu(true);
Fabric.with(getActivity(), new Crashlytics());
getActivity().invalidateOptionsMenu();
rootView = inflater.inflate(R.layout.contact_tab, container,
false);
ctx = getContext();
pref = new PrefManager(getActivity());
mRecyclerView = (IndexFastScrollRecyclerView) rootView.findViewById(R.id.fast_scroller_recycler);
LinearLayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
mLayoutManager = new MyCustomLayoutManager(getActivity());
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.smoothScrollToPosition(0);
gc = GlobalClass.getInstance();
no_contacts = (TextView) rootView.findViewById(R.id.no_contacts);
spotDialog = new SpotsDialog(ctx, R.style.CustomSpotDialog);
ctx = getContext();
dbhelp = new DatabaseHelper(ctx);
initialiseData();
initialiseUI();
etAllContSearch = (EditText) rootView.findViewById(R.id.etAllContSearch);
etAllContSearch.requestFocus();
etAllContSearch.setOnTouchListener(Contacts.this);
etAllContSearch.setCompoundDrawablesWithIntrinsicBounds(R.drawable.search_icon, 0, 0, 0);
mSearchTw = new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (etAllContSearch.getText().toString().trim().length() > 0) {
etAllContSearch.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.closesicon, 0);
mRecyclerView.setIndexBarVisibility(true);
} else {
etAllContSearch.setCompoundDrawablesWithIntrinsicBounds(R.drawable.search_icon, 0, 0, 0);
mRecyclerView.setIndexBarVisibility(false);
}
if (adapter != null) {
//if (!adapter.isEmpty()) {
System.out.println("Test: Result do in search " + s);
adapter.getFilter().filter(s);
mRecyclerView.setIndexBarVisibility(true);
//}
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
if (etAllContSearch.getText().toString().length() == 0 || etAllContSearch.getText().toString() == "") {
mRecyclerView.setIndexBarVisibility(true);
} else {
mRecyclerView.setIndexBarVisibility(false);
}
}
@Override
public void afterTextChanged(Editable s) {
if (etAllContSearch.getText().toString().length() == 0 || etAllContSearch.getText().toString() == "") {
mRecyclerView.setIndexBarVisibility(true);
} else {
mRecyclerView.setIndexBarVisibility(false);
}
}
};
myBooks = new ArrayList<HashMap<String, Object>>();
myBooks1 = new ArrayList<HashMap<String, Object>>();
ContactSimpleList = new ArrayList<String>();
service_start = PreferenceManager.getDefaultSharedPreferences(ctx).getString(Settings.PREF_SERVICE_START + "", Settings.DEFAULT_SERVICE_START);
Log.d(TAG, "contact_sync service flag" + service_start);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkPermission()) {
Log.d(TAG, "inside check permission" + service_start);
if (service_start.equals("0")) {
no_contacts.setVisibility(View.VISIBLE);
no_contacts.setText(getResources().getString(R.string.synchronize_contacts));
} else {
// hideDialog();
no_contacts.setVisibility(View.GONE);
System.out.println("Test: Result oncreate ");
if (mBackground_allcontacts == null) {
mBackground_allcontacts = new Background_allcontacts();
mBackground_allcontacts.execute();
}
}
} else {
requestPermission();
}
} else {
Log.d(TAG, "else " + service_start);
if (service_start.equals("0")) {
no_contacts.setVisibility(View.VISIBLE);
no_contacts.setText(getResources().getString(R.string.synchronize_contacts));
} else {
// hideDialog();
no_contacts.setVisibility(View.GONE);
if (mBackground_allcontacts == null) {
mBackground_allcontacts = new Background_allcontacts();
mBackground_allcontacts.execute();
}
}
}
etAllContSearch.addTextChangedListener(mSearchTw);
IntentFilter iFilter_NorecordFound = new IntentFilter(SipManager.ACTION_NO_RECORD_FOUND);
getActivity().registerReceiver(mNoRecordFound, iFilter_NorecordFound);
return rootView;
}
protected void initialiseData() {
//Recycler view data
mDataArray = DataHelper.getAlphabetData();
//Alphabet fast scroller data
mAlphabetItems = new ArrayList<>();
List<String> strAlphabets = new ArrayList<>();
for (int i = 0; i < mDataArray.size(); i++) {
String name = mDataArray.get(i);
if (name == null || name.trim().isEmpty())
continue;
String word = name.substring(0, 1);
if (!strAlphabets.contains(word)) {
strAlphabets.add(word);
mAlphabetItems.add(new AlphabetItem(i, word, false));
// mAlphabetItems.add(new AlphabetItem(i, word, false));
}
mRecyclerView.smoothScrollToPosition(i);
}
}
protected void initialiseUI() {
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerView.setIndexTextSize(12);
mRecyclerView.setIndexBarColor("#FFFFFF");
mRecyclerView.setIndexBarCornerRadius(0);
mRecyclerView.setIndexBarTransparentValue((float) 0.4);
mRecyclerView.setIndexbarMargin(0);
mRecyclerView.setIndexbarWidth(30);
mRecyclerView.setPreviewPadding(0);
mRecyclerView.setIndexBarTextColor("#2d4278");
mRecyclerView.setIndexBarVisibility(true);
}
private boolean checkPermission() {
int result = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_CONTACTS);
if (result == PackageManager.PERMISSION_GRANTED) {
return true;
} else {
return false;
}
}
private void requestPermission() {
if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(), Manifest.permission.READ_CONTACTS) && ActivityCompat.shouldShowRequestPermissionRationale(getActivity(), Manifest.permission.WRITE_CONTACTS)) {
Toast.makeText(getActivity(), "Until you grant the permission, we canot display the contacts.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS}, Contacts.PREMISSION_CONTACT_REQUEST_CODE);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case Contacts.PREMISSION_CONTACT_REQUEST_CODE:
if (grantResults.length > 0) {
// Contacts permission
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (service_start.equals("0")) {
Toast.makeText(getActivity(), getResources().getString(R.string.synchronize_contacts), Toast.LENGTH_SHORT).show();
} else {
new Background_allcontacts().execute();
}
} else {
Toast.makeText(getActivity(), "Until you grant the permission, we canot display the contacts.", Toast.LENGTH_LONG).show();
}
}
break;
}
}
public void nodata() {
// TODO Auto-generated method stub
no_contacts.setText(getString(R.string.no_sip_contacts));
no_contacts.setVisibility(View.VISIBLE);
mRecyclerView.setVisibility(View.GONE);
}
@Override
public void onActivityCreated(@Nullable Bundle outState) {
super.onActivityCreated(outState);
if (adapter != null) {
adapter.saveStates(outState);
}
}
@Override
public void onViewStateRestored(@Nullable Bundle inState) {
super.onViewStateRestored(inState);
if (adapter != null) {
adapter.restoreStates(inState);
}
}
@Override
public void onResume() {
super.onResume();
isCallPlaced = true;
pref.set_is_ongoing_call_flag(false);
mRecyclerView.setVisibility(View.VISIBLE);
getActivity().invalidateOptionsMenu();
System.out.println("Test: Result onresume ");
}
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
if (isVisibleToUser && this.isVisible()) {
viewPager = (ViewPager) getActivity().findViewById(R.id.viewpager);
if (viewPager.getCurrentItem() == 1) {
gc.hideKeypad(getActivity());
spotDialog.hide();
if (adapter != null) {
adapter.getFilter().filter(etAllContSearch.getText().toString());
mRecyclerView.setIndexBarVisibility(true);
}
}
}
super.setUserVisibleHint(isVisibleToUser);
}
@Override
public boolean onBackPressed() {
return new BackPressImpl(this).onBackPressed();
}
public void getdata() {
if (mBackground_allcontacts == null) {
mBackground_allcontacts = new Background_allcontacts();
mBackground_allcontacts.execute();
}
}
public void getdata(String from, String value) {
if (mBackground_allcontacts == null) {
mBackground_allcontacts = new Background_allcontacts(from, value);
mBackground_allcontacts.execute();
}
}
//Himadri
//Unregister all receiver when view destroy
@Override
public void onDestroyView() {
try {
//Here is the code for stopping some service
} catch (Exception e) {
e.printStackTrace();
}
super.onDestroyView();
}
public class Background_allcontacts extends AsyncTask<Void, Integer, Void> {
String from;
String value;
public Background_allcontacts() {
}
public Background_allcontacts(String from, String value) {
// TODO Auto-generated constructor stub
this.from = from;
this.value = value;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
// showDialog();
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
String dynamic_table = PreferenceManager.getDefaultSharedPreferences(ctx).getString(Settings.PREF_DYNAMIC_TABLE + "", Settings.DEFAULT_DYNAMIC_TABLE);
if (dynamic_table != null) {
if (!dynamic_table.equals(Settings.DEFAULT_DYNAMIC_TABLE)) {
cursor = dbhelp.fetchcalllog("select contact_id,contact_name,contact_num, fav,contactImage from '" + dynamic_table + "' order by UPPER(contact_name)");
}
}
return null;
}
// @SuppressLint("NewApi")
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
try {
ContactSimpleList = new ArrayList<String>();
if (cursor != null) {
if (cursor.getCount() == 0) {
nodata();
} else if (cursor.getCount() > 0) {
no_contacts.setVisibility(View.GONE);
mRecyclerView.setVisibility(View.VISIBLE);
etAllContSearch.setVisibility(View.VISIBLE);
test = PreferenceManager.getDefaultSharedPreferences(getActivity()).getString(Settings.PREF_SIPARRAY + "", Settings.DEFAULT_SIPARRAY);
sip_user_pref = PreferenceManager.getDefaultSharedPreferences(getActivity()).getString(Settings.PREF_SIPUSERARRAY + "", Settings.DEFAULT_SIPARRAY);
String[] separated = null, sipUser = null;
if (test != null && test.length() != 0) {
if (test.charAt(test.length() - 1) == ',') {
test = test.substring(0, test.length() - 1);
} else if (sip_user_pref.charAt(sip_user_pref.length() - 1) == ',') {
sip_user_pref = sip_user_pref.substring(0, sip_user_pref.length() - 1);
}
// Log.v("sip contacts",test);
if (test.contains(",")) {
separated = test.split(",");
sipUser = sip_user_pref.split(",");
}
}
myBooks.clear();
// cursor.moveToFirst();
while (cursor.moveToNext()) {
String id = "", name = "", phoneNumber = "", phoneFav = "", contactImg = "";
try {
id = cursor.getString(0);
name = cursor.getString(1);
phoneNumber = cursor.getString(2);
phoneFav = cursor.getString(3);
contactImg = cursor.getString(4);
} catch (Exception e) {
e.printStackTrace();
}
phoneNumber = phoneNumber.replaceAll("\\D", "");
if (test.contains(",")) {
for (int j = 0; j < separated.length; j++) {
if (Arrays.asList(separated).contains(phoneNumber)) {
if (separated[j].equals(phoneNumber)) {
hm = new HashMap<String, Object>();
hm.put(CONTACTID, id);
hm.put(CONTACTKEY, name);
hm.put(DURATION, phoneNumber);
hm.put(CONTACTFAV, phoneFav);
hm.put("contactImage", contactImg);
hm.put(SIP, sip_label);
hm.put(SIP_USER, sipUser[j]);
myBooks.add(hm);
myBooks1.add(hm);
ContactSimpleList.add(phoneNumber);
}
} else {
hm = new HashMap<String, Object>();
hm.put(CONTACTID, id);
hm.put(CONTACTKEY, name);
hm.put(DURATION, phoneNumber);
hm.put(CONTACTFAV, phoneFav);
hm.put("contactImage", contactImg);
hm.put(SIP, not_sip_label);
hm.put(SIP_USER, "");
myBooks.add(hm);
myBooks1.add(hm);
ContactSimpleList.add(phoneNumber);
}
}
} else {
if (Arrays.asList(test).contains(phoneNumber)) {
hm = new HashMap<String, Object>();
hm.put(CONTACTID, id);
hm.put(CONTACTKEY, name);
hm.put(DURATION, phoneNumber);
hm.put(CONTACTFAV, phoneFav);
hm.put("contactImage", contactImg);
hm.put(SIP, sip_label);
hm.put(SIP_USER, sip_user_pref);
myBooks.add(hm);
myBooks1.add(hm);
ContactSimpleList.add(phoneNumber);
} else {
hm = new HashMap<String, Object>();
hm.put(CONTACTID, id);
hm.put(CONTACTKEY, name);
hm.put(DURATION, phoneNumber);
hm.put(CONTACTFAV, phoneFav);
hm.put("contactImage", contactImg);
hm.put(SIP, not_sip_label);
hm.put(SIP_USER, "");
myBooks.add(hm);
myBooks1.add(hm);
ContactSimpleList.add(phoneNumber);
}
}
}
}
Set<HashMap<String, Object>> unique = new LinkedHashSet<HashMap<String, Object>>(myBooks);
myBooks = new ArrayList<HashMap<String, Object>>(unique);
Set<String> unique1 = new LinkedHashSet<String>(ContactSimpleList);
ContactSimpleList = new ArrayList<String>(unique1);
gc.setContactsList(ctx, myBooks);
gc.setContactListSimpleNum(ctx, ContactSimpleList);
adapter = new ContactsAdapter(myBooks, getActivity(), "ALL_CONTACT", mDataArray, false);
mRecyclerView.setAdapter(adapter);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
mBackground_allcontacts = null;
}
super.onPostExecute(result);
}
}
}