Develop Reference

Implementing Search filter Causing problem when pressed backspace

I am trying to implement a search filter on complex object data in recyclerview when I type in the Edit text first-time it works properly, but whenever I try to delete characters by pressing back-space in order to modify our search- I am repeatedly failing in this regard.
I can only search once !!
etSearch = (EditText) findViewById(R.id.edittext);
etSearch.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
myAdapter.filter(s);
}
#Override
public void afterTextChanged(Editable s) {
}
});
now the filter code
public void filter(CharSequence sequence) {
ArrayList<user> temp = new ArrayList<>();
if (!TextUtils.isEmpty(sequence)) {
for (user s : arr) {
Log.d("users ",s.getName());
if (s.getName().toLowerCase().contains(sequence)) {
temp.add(s);
}
}
} else {
temp.addAll(arrcopy);
}
arr.clear();
arr.addAll(temp);
notifyDataSetChanged();
temp.clear();
}
Whats the issue, I cannot search more than once-any help is appreciated
Here is my Adapter class
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyHolder>
{
Context cxt;
ArrayList<user> arr;
ArrayList<user> arrcopy;
DatabaseReference dref;
MyAdapter myAdapter;
public MyAdapter(Context context, ArrayList<user> arrayList)
{
cxt = context;
arr = arrayList;
arrcopy=new ArrayList<>(arr);
Log.d("Very start arr",arr.toString());
notifyDataSetChanged();
dref = FirebaseDatabase.getInstance().getReference("users");
}
#NonNull
#Override
public MyHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(cxt).inflate(R.layout.item_chatroom,viewGroup,false);
myAdapter = new MyAdapter(cxt, arr);
Log.d("Inside MyHolder arr",arr.toString());
return new MyHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final MyHolder myHolder,final int i) {
final String name = arr.get(i).getUsername();
String pic=arr.get(i).getPic();
final String mail=arr.get(i).getEmail();
myHolder.name.setText(name);
Glide.with(myHolder.profile.getContext())
.load(pic)
.into(myHolder.profile);
myHolder.name.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(cxt,MainActivity.class);
intent.putExtra("Id",arr.get(i).getId());
intent.putExtra("Name",arr.get(i).getUsername());
cxt.startActivity(intent);
}
});
myHolder.info.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final SweetAlertDialog pDialog = new SweetAlertDialog(cxt, SweetAlertDialog.SUCCESS_TYPE);
pDialog.setTitleText("User Information e-mail ID");
pDialog.setContentText("Name: "+name+"\n\n E-mail: "+mail);
pDialog.setConfirmText("Ok");
pDialog.show();
}
});
}
#Override
public int getItemCount() {
return arr.size();
}
class MyHolder extends RecyclerView.ViewHolder
{
TextView name;
ImageView profile,info;
public MyHolder(#NonNull View itemView) {
super(itemView);
name = itemView.findViewById(R.id.txv);
profile=itemView.findViewById(R.id.profile);
info=itemView.findViewById(R.id.profileinfo);
}
}
public void filter(CharSequence sequence) {
ArrayList<user> temp = new ArrayList<>();
if (!TextUtils.isEmpty(sequence)) {
for (user s : arr) {
if (s.getName().toLowerCase().contains(sequence)) {
temp.add(s);
}
}
} else {
temp.addAll(arrcopy);
}
arr.clear();
arr.addAll(temp);
notifyDataSetChanged();
temp.clear();
}
}

I assume the arrcopy is the copy of arr like:
ArrayList<User> arrcopy = new ArrayList<>(arr);
If you modify arr, it also change the content of arrcopy. And when no result matches, the arr is empty, so is the arrcopy.
else {
temp.addAll(arrcopy);
}
arr.clear();
arr.addAll(temp);
Now temp is empty, the arr data you set for adapter is empty, so issues happens.
Please try:
In MyAdapter:
Context cxt;
ArrayList<user> arr;
public MyAdapter(Context context) {
cxt = context;
dref = FirebaseDatabase.getInstance().getReference("users");
}
public void setData(ArrayList<User> arrayList) {
arr = arrayList;
notifyDataSetChanged();
}
Also put the filter() in your activity/fragment:
protected void onCreate(final Bundle savedInstanceState) {
etSearch = (EditText) findViewById(R.id.edittext);
etSearch.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
etSearch.requestFocus();
}
});
etSearch.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
filter(etSearch.getText().toString());
}
#Override
public void afterTextChanged(Editable s) {
}
});
etSearch.clearFocus();
mAdapter = new MyAdapter(this);
mAdapter.setData(arrayList);
mRecyclerView.setAdapter(mAdapter);
...
}
public void filter(String input) {
if (!TextUtils.isEmpty(input)) {
ArrayList<User> temp = new ArrayList<>();
for (user s : arr) {
if (s.getName().toLowerCase().contains(input)) {
temp.add(s);
}
}
mAdapter.setData(temp);
} else {
mAdapter.setData(arr);
}
mAdapter.notifyDataSetChanged();
}

Implement Filterable in your MyAdapter
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyHolder>
implements Filterable {
// change MyObject to user class
//replace myObjects with arr and reservedList with arrcopy
Context cxt;
ArrayList<MyObject> myObjects;
ArrayList<MyObject> reservedList;
DatabaseReference dref;
public MyAdapter(Context context, ArrayList<MyObject> arrayList){
cxt = context;
myObjects = arrayList;
reservedList = arrayList
Log.d("Very start arr",myObjects.toString());
// notifyDataSetChanged();
dref = FirebaseDatabase.getInstance().getReference("users");
}
//...
#Override
public Filter getFilter() {
return new Filter() {
#Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString().toLowerCase();
if (!charString.isEmpty()) {
List<MyObject> filteredList = new ArrayList<>();
for (MyObject row : reservedList) {
if (row.getName().toLowerCase().contains(charString)){
filteredList.add(row);
}
}
myObjects = filteredList;
} else {
myObjects = reservedList;
}
FilterResults filterResults = new FilterResults();
filterResults.values = myObjects;
return filterResults;
}
#Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
myObjects = (ArrayList<MyObject>) filterResults.values;
notifyDataSetChanged();
}
};
}
and from your activity
etSearch = (EditText) findViewById(R.id.edittext);
etSearch.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
myAdapter.getFilter().filter(s);
}
#Override
public void afterTextChanged(Editable s) {
}
});

Recyclerview not updating on searchview text change

Friends , I have an edittext which is acting like a searchview.On text change,it is fetching data and storing in filterdNames but it is not updating the recyclerview.Kindly help, i am new to andriod.
Here is my recyclerview adapter code-
public class MyCategoryAdaptercheckbox extends RecyclerView.Adapter<MyCategoryAdaptercheckbox.ViewHolder> {
List<GetMyCategoryAdapter> getMyCategoryAdapter;
Context context;
List<String> category_name;
GetMyCategoryAdapter getMyCategoryAdapter1;
public MyCategoryAdaptercheckbox(List<GetMyCategoryAdapter> getMyCategoryAdapter, Context context, List<String> category_name) {
this.getMyCategoryAdapter = getMyCategoryAdapter;
this.context = context;
this.category_name = category_name;
}
#Override
public void onBindViewHolder(#NonNull ViewHolder viewHolder, int i) {
if (viewHolder instanceof ViewHolder){
}
getMyCategoryAdapter1 = getMyCategoryAdapter.get(i);
((ViewHolder) viewHolder).tv_categorytitle.setText(getMyCategoryAdapter1.getC_name());
((ViewHolder) viewHolder).tv_categoryid.setText(getMyCategoryAdapter1.getC_id());
((ViewHolder) viewHolder).gt= getMyCategoryAdapter1;
}
public void filterList(ArrayList<String> filterdNames) {
this.category_name = filterdNames;
notifyDataSetChanged();
}
}
Here is my GetMyCategoryAdapter class code -
public class GetMyCategoryAdapter {
String c_name,c_id;
public String getC_name() {
return c_name;
}
public void setC_name(String c_name) {
this.c_name = c_name;
}
public String getC_id() {
return c_id;
}
public void setC_id(String c_id) {
this.c_id = c_id;
}
}
And here is the fragment code -
searchView.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
#Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
#Override
public void afterTextChanged(Editable editable) {
//after the change calling the method and passing the search input
filter(editable.toString());
}
});
private void filter(String text) {
//new array list that will hold the filtered data
ArrayList<String> filterdNames = new ArrayList<>();
//looping through existing elements
for (String s : category_name) {
//if the existing elements contains the search input
if (s.toLowerCase().contains(text.toLowerCase())) {
//adding the element to filtered list
filterdNames.add(s);
}
}
//calling a method of the adapter class and passing the filtered list
((MyCategoryAdaptercheckbox) MyAdapter).filterList(filterdNames);
}

The problem is in filterList method:
you update category_name, but not getMyCategoryAdapter (which is used in onBindViewHolder). Try change getMyCategoryAdapter as well before notifyDataSetChanged

Array Adapter - getCount return previous count

I'm using array adapter to implement a search view to search for hard coded elements
my code as follows
public class MainActivity extends AppCompatActivity {
ListView list;
ArrayAdapter<String> adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.toolbar);
list = (ListView) findViewById(R.id.list_view);
EditText edittext = (EditText) findViewById(R.id.editText);
edittext.addTextChangedListener(textWatcher);
adapter = new ArrayAdapter<String>(getApplicationContext(), R.layout.row_item, COUNTRIES);
}
TextWatcher textWatcher = new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (s.toString().equals(""))
list.setAdapter(null);
else {
adapter.getFilter().filter(s.toString());
adapter.notifyDataSetChanged();
list.setAdapter(adapter);
// adapter.clear();
Log.v("HEY", adapter.getCount() + "");
}
}
#Override
public void afterTextChanged(Editable s) {
}
};
private static final String[] COUNTRIES = new String[]{
"FAAAFA", "France", "FOO"};
}
When i type F in the search for example, the count is printed 0 instead of 3
then when i apply any other query the count is 3 (ie it prints the count of previous query to current one)

Add numbers from EditTexts

I've created an Activity where I've got an "Add subject" button. When I press it, it creates an item in a ListView, which is formed by an EditText where the user enters a number.
What I want to do is to add the numbers inside the EditTexts of each item created, depending if the user has created 3, 4, 5, etc. items in the ListView, via button.
Here is the code of the Activity:
public class PersActivity extends Activity {
Button start, calcaverage1;
private SubjectAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.subject_list_view);
setupListViewAdapter();
setupAddMarkButton();
// Accept button
Button acceptbn= (Button)findViewById(R.id.start1);
acceptbn.setOnClickListener(new OnClickListener()
{ public void onClick(View v)
{
Intent intent = new Intent(PersActivity.this, MainActivity.class);
startActivity(intent);
finish();
}
});
}
public void removeClick(View v) {
Mark itemToRemove = (Mark)v.getTag();
adapter.remove(itemToRemove);
}
private void setupListViewAdapter() {
adapter = new SubjectAdapter(PersActivity.this, R.layout.subject_list_item, new ArrayList<Mark>());
ListView atomPaysListView = (ListView)findViewById(R.id.subject_list_item);
atomPaysListView.setAdapter(adapter);
}
private void setupAddMarkButton() {
findViewById(R.id.addsubject).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
adapter.insert(new Mark("", 0), 0);
}
});
}
}
Here is the code of the adapter:
public class SubjectAdapter extends ArrayAdapter<Mark> {
protected static final String LOG_TAG = SubjectAdapter.class.getSimpleName();
private List<Mark> items;
private int layoutResourceId;
private Context context;
public SubjectAdapter(Context context, int layoutResourceId, List<Mark> items) {
super(context, layoutResourceId, items);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.items = items;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
MarkHolder holder = null;
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new MarkHolder();
holder.Mark = items.get(position);
holder.removePaymentButton = (ImageButton)row.findViewById(R.id.remove);
holder.removePaymentButton.setTag(holder.Mark);
holder.name = (TextView)row.findViewById(R.id.subjectname);
setNameTextChangeListener(holder);
holder.value = (TextView)row.findViewById(R.id.subjectmark);
setValueTextListeners(holder);
row.setTag(holder);
setupItem(holder);
return row;
}
private void setupItem(MarkHolder holder) {
holder.name.setText(holder.Mark.getName());
holder.value.setText(String.valueOf(holder.Mark.getValue()));
}
public static class MarkHolder {
Mark Mark;
TextView name;
TextView value;
ImageButton removePaymentButton;
}
private void setNameTextChangeListener(final MarkHolder holder) {
holder.name.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
holder.Mark.setName(s.toString());
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
#Override
public void afterTextChanged(Editable s) { }
});
}
private void setValueTextListeners(final MarkHolder holder) {
holder.value.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
try{
holder.Mark.setValue(Double.parseDouble(s.toString()));
}catch (NumberFormatException e) {
Log.e(LOG_TAG, "error reading double value: " + s.toString());
}
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
#Override
public void afterTextChanged(Editable s) { }
});
}
}
I've implemented serializable to pass data through the adapter:
public class Mark implements Serializable {
private static final long serialVersionUID = -5435670920302756945L;
private String name = "";
private double value = 0;
public Mark(String name, double value) {
this.setName(name);
this.setValue(value);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getValue() {
return value;
}
public void setValue(double value) {
this.value = value;
}
}
Hope there's a solution. Thanks!

Here is how you would do it
addNumberFromText()
{
int total=0;
for(int i=0;i<listView.getChildCount();i++)
{
View wantedView = listView.getChildAt(i);
EditText edtText=view.findViewById(R.id.specificEditTextId);
//not checking wheter integer valid or not, Please do so
int value=Integer.parseInt(edtText.toString());
total+=value;
}
Log.d(TAG,"total sum is "+total);
}
update your activity from following code
public class PersActivity extends Activity
{
Button start, calcaverage1;
private SubjectAdapter adapter;
ListView atomPaysListView;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.subject_list_view);
atomPaysListView = (ListView)findViewById(R.id.subject_list_item);
setupListViewAdapter();
setupAddMarkButton();
// Accept button
Button acceptbn= (Button)findViewById(R.id.start1);
acceptbn.setOnClickListener(new OnClickListener()
{ public void onClick(View v)
{
Intent intent = new Intent(PersActivity.this, MainActivity.class);
startActivity(intent);
finish();
}
});
}
public void removeClick(View v) {
Mark itemToRemove = (Mark)v.getTag();
adapter.remove(itemToRemove);
}
private void setupListViewAdapter() {
adapter = new SubjectAdapter(PersActivity.this, R.layout.subject_list_item, new ArrayList<Mark>());
atomPaysListView.setAdapter(adapter);
}
private void setupAddMarkButton() {
findViewById(R.id.addsubject).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
adapter.insert(new Mark("", 0), 0);
}
});
}
addNumberFromText()
{
double total=0;
for(int i=0;i<atomPaysListView.getChildCount();i++)
{
View wantedView = atomPaysListView.getChildAt(i);
/*
// if edit text
EditText edt=(EditText)view.findViewById(R.id.editText);
//not checking wheter valid or not, Please do so
double value=Double.parseDouble(edt.toString());
*/
//you say edittext, but its a textview or so it seems
TextView txv=(TextView)view.findViewById(R.id.subjectmark);
//not checking wheter valid or not, Please do so
double value=Double.parseDouble(txv.toString());
total+=value;
}
Log.d(TAG,"total sum is "+total);
}
}

Editable text view with spinner android

I want to create a control in android where user can input through keyboard or enter through drop down list(spinner).
Actually the values I hard code in array in spinner is not exhaustive, so user should have the option to input through virtual keyboard also.
So Either user can enter through keyboard or select from list?
How can i achieve this in android?

You can build your own view:
public class ServerPreference extends DialogPreference {
private String value;
private EditText editText;
private Spinner spinner;
private final int server_list_id;
ArrayList<String> servers;
public ServerPreference(Context context, AttributeSet attrs) {
super(context, attrs);
setPersistent(false);
setDialogLayoutResource(R.layout.server_preference_layout);
servers = new ArrayList<String>();
Resources r = context.getResources();
if (MySettings.KEY_ASR_SERVER_HOST.equals(getKey())) {
server_list_id = R.array.asrServers;
} else if (MySettings.KEY_LOG_SERVER_HOST.equals(getKey())) {
server_list_id = R.array.logServers;
} else {
server_list_id = R.array.servicesServers;
}
Collections.addAll(servers, r.getStringArray(server_list_id));
}
#Override
protected void onBindDialogView(View view) {
editText = (EditText)view.findViewById(R.id.server_preference_text);
spinner = (Spinner)view.findViewById(R.id.server_preference_spinner);
SharedPreferences pref = getSharedPreferences();
value = pref.getString(getKey(), "");
editText.setText(value);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
view.getContext(), server_list_id, android.R.layout.simple_spinner_item );
adapter.setDropDownViewResource( android.R.layout.simple_dropdown_item_1line );
spinner.setAdapter( adapter );
updateSpinner();
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if ( position != 0 ) {
value = servers.get(position);
editText.setText(value);
}
}
public void onNothingSelected(AdapterView<?> arg0) {
}
});
editText.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
updateSpinner();
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void afterTextChanged(Editable s) {
}
});
super.onBindDialogView(view);
}
void updateSpinner() {
value = editText.getText().toString();
int index = servers.indexOf(value);
if ( index == -1 )
index = 0;
spinner.setSelection(index);
}
#Override
protected void onDialogClosed(boolean positiveResult) {
if ( positiveResult ) {
SharedPreferences.Editor editor = getEditor();
editor.putString(getKey(),value);
editor.commit();
}
super.onDialogClosed(positiveResult);
}
public String getValue() {
return value;
}
void setValue(String value) {
this.value = value;
}
}
Layout of custom view:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText android:layout_height="wrap_content" android:layout_width="match_parent" android:id="#+id/server_preference_text" android:inputType="text">
<requestFocus></requestFocus>
</EditText>
<Spinner android:layout_height="wrap_content" android:id="#+id/server_preference_spinner" android:layout_width="match_parent"></Spinner>
</LinearLayout>
When you want to use this view, just define in XML file:
<xxx.xxxxxx.xxxxx.settings.debug.ServerPreference
android:title="ASR/VVS Server"
android:persistent="true"
android:positiveButtonText="OK"
android:dialogTitle="ASR/VVS Server"
android:key="SERVER_NAME"
android:negativeButtonText="Cancel"
android:entryValues="#array/asrServers"
android:entries="#array/asrServers"/>