EditText.addTextChangedListener (android.text.TextWatcher) 'on a null object reference

I created a Custom ListView and am trying to create a Custom Filter / Search Filter via EditText.

Code in DictionaryFragment:

EditText editText; ListView listView; MyAdapter adapter; MyAdapter myAdapter; ArrayList<SingleRow> mylist; TextWatcher textWatcher = new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { myAdapter.getFilter().filter(s); } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { } }; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_dictionary, container, false); listView = view.findViewById(R.id.dictionaryList); editText = (EditText)view.findViewById(R.id.edit_search); editText.addTextChangedListener(textWatcher); mylist = new ArrayList<>(); SingleRow singleRow; for (int i = 0;i<mFind.length;i++){ singleRow = new SingleRow(mTitle[i],mDescriprion[i],images[i]); mylist.add(singleRow); } myAdapter = new MyAdapter(getActivity(),mylist); listView.setAdapter(myAdapter); return view; } 

MyAdapter class

 public class MyAdapter extends BaseAdapter implements Filterable { Context c; ArrayList<SingleRow> originalArray,tempArray; CustomFilter cs; public MyAdapter(Context c, ArrayList<SingleRow> originalArray){ this.c = c; this.originalArray = originalArray; this.tempArray = originalArray; } @Override public Object getItem(int i) { return originalArray.get(i); } @Override public View getView(int i, View view, ViewGroup viewGroup) { LayoutInflater inflater = (LayoutInflater)c.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View row = inflater.inflate(R.layout.row,null); ImageView images = row.findViewById(R.id.imageViewKanji); TextView myTitle = row.findViewById(R.id.textView1); TextView myDescription = row.findViewById(R.id.textView2); myTitle.setText(originalArray.get(i).getTitle()); myDescription.setText(originalArray.get(i).getDescription()); images.setImageResource(originalArray.get(i).getImage()); return row; } @Override public int getCount() { return originalArray.size(); } @Override public long getItemId(int i) { //return originalArray.indexOf(getItemId(i)); return i; } @Override public Filter getFilter() { if (cs == null) { cs = new CustomFilter(); } return cs; } class CustomFilter extends Filter{ @Override protected FilterResults performFiltering(CharSequence charSequence) { FilterResults results = new FilterResults(); if (charSequence != null && charSequence.length() > 0) { charSequence = charSequence.toString().toUpperCase(); ArrayList<SingleRow> filters = new ArrayList<>(); for (int i = 0; i < tempArray.size(); i++) { if (tempArray.get(i).getTitle().toUpperCase().contains(charSequence)) { SingleRow singleRow = new SingleRow(tempArray.get(i).getTitle(), tempArray.get(i).getDescription(), tempArray.get(i).getImage()); filters.add(singleRow); } } results.count = filters.size(); results.values = filters; } else { results.count = tempArray.size(); results.values = tempArray; } return results; } @Override protected void publishResults(CharSequence charSequence, FilterResults filterResults) { originalArray = (ArrayList<SingleRow>)filterResults.values; notifyDataSetChanged(); } } 

SingleRow Class

 public class SingleRow { String title; String description; int image; public SingleRow(String title, String description,int image){ this.title = title; this.description = description; this.image = image; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } public int getImage() { return image; } public void setImage(int image) { this.image = image; } 

}

 2019-05-12 17:06:15.359 17262-17262/com.example.kanjilearn E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.kanjilearn, PID: 17262 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.kanjilearn/com.example.kanjilearn.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.EditText.addTextChangedListener(android.text.TextWatcher)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2794) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2872) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1601) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6600) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:518) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:821) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.EditText.addTextChangedListener(android.text.TextWatcher)' on a null object reference at com.example.kanjilearn.DictionaryFragment.onCreateView(DictionaryFragment.java:419) 

If this is not enough, then here is my github