问题
I am trying to apply search on ndroid ListView but its not working for me, here is the code i have tried.
final ArrayList<Users> uData = new ArrayList<Users>();
listView = (ListView) findViewById(R.id.listView1);
listView.setAdapter(new CustomListAdapter(this, uData));
searchBox.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
((Filterable) ViewInfo.this.listView.getAdapter()).getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
Here is the Users class
public class Users implements Serializable
{
private String name;
private String date;
private String email;
private String image;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getimage() {
return image;
}
public void setimage(String image) {
this.image = image;
}
and here is the CustomListAdapter
public class CustomListAdapter extends BaseAdapter {
private ArrayList<Users> listData;
private LayoutInflater layoutInflater;
Users Act = new Users();
public CustomListAdapter(Context context, ArrayList<Users> listData) {
this.listData = listData;
layoutInflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return listData.size();
}
@Override
public Object getItem(int position) {
return listData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = layoutInflater.inflate(R.layout.list_row, null);
holder = new ViewHolder();
holder.picView = (ImageView) convertView.findViewById(R.id.pic);
holder.dateView = (TextView) convertView.findViewById(R.id.date);
holder.nameView = (TextView) convertView.findViewById(R.id.name);
holder.emailView = (TextView) convertView.findViewById(R.id.email);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
Users act = listData.get(position);
holder.picView.setImageBitmap(decodeFile(act.getimage()));
holder.dateView.setText(act.getDate());
holder.nameView.setText(act.getName());
holder.emailView.setText(act.getEmail());
return convertView;
}
static class ViewHolder {
ImageView picView;
TextView dateView;
TextView emailView;
TextView nameView;
}
}
and here is what LogCat says
04-28 15:55:52.677: E/AndroidRuntime(25953): FATAL EXCEPTION: main
04-28 15:55:52.677: E/AndroidRuntime(25953): java.lang.ClassCastException: com.assignment1.reginfo.CustomListAdapter cannot be cast to android.widget.Filterable
04-28 15:55:52.677: E/AndroidRuntime(25953): at com.assignment1.reginfo.ViewInfo$4.onTextChanged(ViewInfo.java:186)
04-28 15:55:52.677: E/AndroidRuntime(25953): at android.widget.TextView.sendOnTextChanged(TextView.java:7518)
04-28 15:55:52.677: E/AndroidRuntime(25953): at android.widget.TextView.handleTextChanged(TextView.java:7580)
04-28 15:55:52.677: E/AndroidRuntime(25953): at android.widget.TextView$ChangeWatcher.onTextChanged(TextView.java:9329)
04-28 15:55:52.677: E/AndroidRuntime(25953): at android.text.SpannableStringBuilder.sendTextChanged(SpannableStringBuilder.java:962)
04-28 15:55:52.677: E/AndroidRuntime(25953): at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:496)
回答1:
The Adapter you are using not works with Filter. It only works with ArrayAdapter. So either you use ArrayAdapter or write your own code for filteration of data.
回答2:
You may follow below step:
1) Implements your Base adapter class with filterable class
2) You will get overriden method "public Filter getFilter()" you can use below code for filtering data
mListe is the original ArrayList<ContactsPojo>
mListSearch is the filtered ArrayList<ContactsPojo>
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("null")
@SuppressLint("DefaultLocale")
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults result = new FilterResults();
if (constraint != null && constraint.length() > 0) {
synchronized (this) {
mListSearch = new ArrayList<ContactsPojo>();
for (int i = 0; i < mListe.size(); i++) {
if ((mListe.get(i).getContactsName().toUpperCase())
.contains(constraint.toString()
.toUpperCase())) {
ContactsPojo contacts = new ContactsPojo();
contacts.setContactsName(mListe.get(i)
.getContactsName());
contacts.setImage(mListe.get(i).getImage());
mListSearch.add(contacts);
}
}
}
result.count = mListSearch.size();
result.values = mListSearch;
} else if (constraint == null && constraint.length() == 0) {
synchronized (this) {
result.count = mListe.size();
result.values = mListe;
}
}
return result;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults result) {
if (result.count == 0) {
// mListe = (ArrayList<ContactsPojo>) mListe;
notifyDataSetInvalidated();
} else {
mListe = (ArrayList<ContactsPojo>) result.values;
notifyDataSetChanged();
}
}
};
return filter;
}
3) Then you can add this filter to edittext
edtSearchContacts.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
mlistAdapter.getFilter().filter(s);
mlistAdapter.notifyDataSetChanged();
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@SuppressLint("NewApi")
@Override
public void afterTextChanged(Editable s) {
if (s.toString().isEmpty()) {
mlistAdapter = new MyListAdapterTwoLine(_con, al3);
lvPhnContacts.setAdapter(mlistAdapter);
}
}
});
}
In afterTextChanged method you will get original items back to listview.
回答3:
You can't convert BaseAdapter to Filterable. Beacause BaseAdapter not implemented Filterable. Try using SimpleAdapter.
来源：https://stackoverflow.com/questions/23339478/android-listview-with-custom-adapter-search-not-working