When I try to add a TextChangedListener to my EditText the app crashes, even if I don't write anything inside the AfterTextChangedMethod. I'm trying to get the string inserted by the user, but as soon as I add my listener it crashes.
public class MainActivityFragment extends Fragment {
ArrayList<HashMap<String,String>> city_list;
public MainActivityFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
EditText search = (EditText) getActivity().findViewById(R.id.search_view);
search.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) { }
@Override
public void afterTextChanged(Editable s) {
String inserted = s.toString();
for(int i=0; i< city_list.size();i++){
if(city_list.get(i).toString().equalsIgnoreCase(inserted)){
TextView id = (TextView) getActivity().findViewById(R.id.city_id);
id.setText(city_list.get(i).get("_id").toString());
TextView lat = (TextView) getActivity().findViewById(R.id.city_lat);
lat.setText(city_list.get(i).get("lat").toString());
TextView lon = (TextView) getActivity().findViewById(R.id.city_long);
lon.setText(city_list.get(i).get("lon").toString());
}
}
}
});
return inflater.inflate(R.layout.fragment_main, container, false);
}
Try this,
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main, container, false);
EditText search = (EditText)view.findViewById(R.id.search_view);
search.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) {
}
@Override
public void afterTextChanged(Editable s) {
String inserted = s.toString();
for(int i=0; i< city_list.size();i++){
if(city_list.get(i).toString().equalsIgnoreCase(inserted)){
TextView id = (TextView) view .findViewById(R.id.city_id);
id.setText(city_list.get(i).get("_id").toString());
TextView lat = (TextView) view .findViewById(R.id.city_lat);
lat.setText(city_list.get(i).get("lat").toString());
TextView lon = (TextView) view .findViewById(R.id.city_long);
lon.setText(city_list.get(i).get("lon").toString());
}
}
}
});
return view;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main, container, false);
EditText search = (EditText)view.findViewById(R.id.search_view);
search.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) {
}
@Override
public void afterTextChanged(Editable s) {
String inserted = s.toString();
for(int i=0; i< city_list.size();i++){
if(city_list.get(i).toString().equalsIgnoreCase(inserted)){
TextView id = (TextView) view .findViewById(R.id.city_id);
id.setText(city_list.get(i).get("_id").toString());
TextView lat = (TextView) view .findViewById(R.id.city_lat);
lat.setText(city_list.get(i).get("lat").toString());
TextView lon = (TextView) getActivity()view .findViewById(R.id.city_long);
lon.setText(city_list.get(i).get("lon").toString());
}
}
}
});
return view;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view= inflater.inflate(R.layout.fragment_main, container, false);
EditText search = (EditText) view.findViewById(R.id.search_view);
TextView id = (TextView) view.findViewById(R.id.city_id);
TextView lat = (TextView) view.findViewById(R.id.city_lat);
TextView lon = (TextView) view.findViewById(R.id.city_long);
search.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) {
}
@Override
public void afterTextChanged(Editable s) {
String inserted = s.toString();
for(int i=0; i< city_list.size();i++){
if(city_list.get(i).toString().equalsIgnoreCase(inserted)){
id.setText(city_list.get(i).get("_id").toString());
lat.setText(city_list.get(i).get("lat").toString());
lon.setText(city_list.get(i).get("lon").toString());
}
}
}
});
return view;
}
You are not inflating your view in you onCreateViewMethod first. First Inflate your view and then find sub views.
Your app is crashing because you are trying to add a listener to a null reference object. Double check the ID you are assigning to your editext. Moreover try the below code.
Just return this in your onCreateView Method.
return inflater.inflate(R.layout.fragment_main, container, false);
Override onViewCreated method, use the incoming View variable to initialize your EditText.
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
EditText etSearch = (EditText) view.findViewById(R.id.search_view);
}
Then add textChangeListener to it.
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) {
}
@Override
public void afterTextChanged(Editable s) {
//your code here
}
});
Hope it helps.
Try this...
I think you want to use LayoutInflater for your view.
LayoutInflater inflater1 = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.fragment_main, container, false);
EditText search = (EditText)view.findViewById(R.id.search_view);
Then you can override TextChangedMethod method
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