Vfrdtyky

I must do small project - Notepad in Android Studio on my college.
I have problem, because I must do the Activity which search and read file by it's name.

This is my code:

NotesActivity - Here I have all to do file list and I think here need help.
In function onCreate (NotesActivity) , I added line 48 to 69 for create FilterList, but doesn't work.
Do you know Why ? Thank you for everythink help.

 package com.example.kompiuter.notepad;



    import android.content.Intent;

    import android.os.Bundle;

    import android.support.design.widget.FloatingActionButton;

    import android.support.v7.app.AlertDialog;

    import android.support.v7.app.AppCompatActivity;

    import android.support.v7.widget.LinearLayoutManager;

    import android.support.v7.widget.RecyclerView;

    import android.text.Editable;

    import android.text.TextWatcher;

    import android.view.View;

    import android.view.View.OnLongClickListener;

    import android.widget.AdapterView;

    import android.widget.ArrayAdapter;

    import android.widget.EditText;

    import android.widget.ListView;

    import android.widget.Toast;



    import java.util.ArrayList;

    import java.util.Arrays;

    import java.util.List;



    public class NotesActivity extends AppCompatActivity {



        private ListView mListViewNotes;

        private EditText findText;

        private ArrayAdapter adapter;



        protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.notes_activity);



            findText = (EditText) findViewById(R.id.note_find);

            mListViewNotes = (ListView) findViewById(R.id.list);



            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.floatingActionButton2);

            fab.setOnClickListener(new View.OnClickListener() {

                @Override

                public void onClick(View v) {

                    Intent intent = new Intent(getApplicationContext(),WriteNoteActivity.class);

                    startActivity(intent);

                }

            });

            ArrayList<Notes> notes = new ArrayList<>();

            ArrayList<String> noteFiles = new ArrayList<>();



            adapter = new ArrayAdapter<>(this,R.layout.notes_activity_layout,notes);

            mListViewNotes.setTextFilterEnabled(true);

            mListViewNotes.setAdapter(adapter);



            findText.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) {

                    NotesActivity.this.adapter.getFilter().filter(s);

                    adapter.notifyDataSetChanged();



                }



                @Override

                public void afterTextChanged(Editable s) {



                }

            });









        }





        @Override

        protected void onResume(){

            super.onResume();

            mListViewNotes.setAdapter(null);



            final ArrayList<Notes> notes = Utilities.getAllSavedNotes(this);



            if(notes == null || notes.size() == 0){

                Toast.makeText(this,"Nie masz notatek do zapisania!",Toast.LENGTH_SHORT).show();

                return;

            }else{

                final NotesAdapter na = new NotesAdapter(this,R.layout.notes_activity,notes);

                mListViewNotes.setAdapter(na);



                mListViewNotes.setOnItemClickListener(new AdapterView.OnItemClickListener() {

                    @Override

                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                        String fileName = ((Notes)mListViewNotes.getItemAtPosition(position)).getDateTime() + Utilities.FILE_EXTENSION;

                        Intent viewNoteIntent = new Intent(getApplicationContext(),WriteNoteActivity.class);

                        viewNoteIntent.putExtra("NOTE_FILE",fileName);

                        startActivity(viewNoteIntent);

                    }

                });





            }





        }

    }

Next is Constructor and Adapter:

package com.example.kompiuter.notepad;



import android.content.Context;



import java.io.Serializable;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import java.util.TimeZone;



public class Notes implements Serializable {



    private String mTitle;

    private String mContent;

    private long mDateTime;



    public Notes(long dateInMinillis,String title,String content){

        mDateTime = dateInMinillis;

        mTitle = title;

        mContent = content;

    }



    public void setTitle(String title){

        mTitle=title;

    }



    public String getTitle(){

        return mTitle;

    }



    public long getDateTime() {

        return mDateTime;

    }



    public String getDateTimeFormatted(Context context) {

        SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss"

                , context.getResources().getConfiguration().locale);

        formatter.setTimeZone(TimeZone.getDefault());

        return formatter.format(new Date(mDateTime));

    }



    public void setContent(String content){

        mContent=content;

    }

    public String getContent() {

        return mContent;

    }

}





package com.example.kompiuter.notepad;



import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.TextView;



import java.util.ArrayList;

import java.util.List;



public class NotesAdapter extends ArrayAdapter<Notes> {







    public NotesAdapter(Context context, int resource, List<Notes> object) {

        super(context, resource, object);

    }



    @Override

    public View getView(int position, View converView, ViewGroup parent){

        //return super.getView(position,converView,parent);

        if (converView == null){

            converView=LayoutInflater.from(getContext()).inflate(R.layout.notes_activity_layout,null);

        }

        Notes note =getItem(position);



        if (note!=null){

            TextView title = (TextView) converView.findViewById(R.id.noteName);



            title.setText(note.getTitle());





        }



        return converView;

    }











}