My Adapter classs
public class user_list_Adapter extends BaseAdapter {
private Context context;
public static ArrayList<user_list_item> user_arraylist;
private ArrayList<user_list_item> arraylist;
public static String selected_code;
public user_list_Adapter(Context context, ArrayList<user_list_item> user_array) {
this.context = context;
this.user_arraylist = user_array;
this.arraylist = new ArrayList<user_list_item>();
this.arraylist.addAll(user_array);
}
@Override
public int getCount() {
return user_arraylist.size();
}
@Override
public Object getItem(int position) {
return user_arraylist.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.user_row, null);
}
TextView txtname = (TextView) convertView.findViewById(R.id.dname);
TextView txtcode = (TextView) convertView.findViewById(R.id.dcode);
txtname.setText(user_arraylist.get(position).getCust_name());
txtcode.setText(user_arraylist.get(position).getCode());
// Listen for ListView Item Click
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Deposite df = new Deposite();
MainActivity activity = (MainActivity) context; //this line gives class cast exception
FragmentTransaction transaction = activity.getSupportFragmentManager().beginTransaction();
Bundle b = new Bundle();
b.putString("search_name ", search_name);
b.putString("search_code ", search_code);
df.setArguments(b);
transaction.replace(R.id.content_frame, df);
transaction.addToBackStack(null);
transaction.commit();
}
});
return convertView;
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
user_arraylist.clear();
if (charText.length() == 0) {
user_arraylist.addAll(arraylist);
}
else
{
for (user_list_item item : arraylist)
{
if (item.getCust_name().toLowerCase(Locale.getDefault()).contains(charText))
{
user_arraylist.add(item);
}
if (item.getCode().toLowerCase(Locale.getDefault()).contains(charText))
{
user_arraylist.add(item);
}
}
}
notifyDataSetChanged();
}
}
答案 0 :(得分：0)
我的Adpater类，内部类过滤器
public class user_list_Adapter extends ArrayAdapter<user_list_item> implements Filterable
{
private Filter mfilter;
private Context context;
private ArrayList<user_list_item> filter_user_list;
private ArrayList<user_list_item> alluserlist;
//public static String selected_code;
public user_list_Adapter(Context context, ArrayList<user_list_item> user_array) {
super(context,R.layout.user_row,user_array);
this.context = context;
this.filter_user_list = user_array;
this.alluserlist = new ArrayList<user_list_item>();
this.alluserlist.addAll(user_array);
}
@Override
public int getCount() {
return filter_user_list.size();
}
@Override
public user_list_item getItem(int position) {
return filter_user_list.get(position);
}
@Override
public long getItemId(int position) {
return filter_user_list.get(position).hashCode();
}
public void resetData() {
filter_user_list = alluserlist;
}
/* *********************************
* We use the holder pattern
* It makes the view faster and avoid finding the component
* **********************************/
private static class UserHolder {
public TextView txtname;
public TextView txtcode;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
UserHolder uholder=new UserHolder();
// First let's verify the convertView is not null
if (convertView == null) {
// This a new view we inflate the new layout
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.user_row, null);
// Now we can fill the layout with the right values
TextView tvname = (TextView) convertView.findViewById(R.id.dname);
TextView tvcode = (TextView) convertView.findViewById(R.id.dcode);
uholder.txtname = tvname;
uholder.txtcode = tvcode;
convertView.setTag(uholder);
}
else
uholder = (UserHolder) convertView.getTag();
user_list_item p = filter_user_list.get(position);
uholder.txtname.setText(p.getCust_name());
uholder.txtcode.setText(p.getCode());
return convertView;
}
/*
* We create our filter
*/
@Override
public Filter getFilter() {
if (mfilter == null)
mfilter = new userFilter();
return mfilter;
}
private class userFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence charText) {
FilterResults results = new FilterResults();
// We implement here the filter logic
if (charText == null || charText.length() == 0) {
// No filter implemented we return all the list
results.values = alluserlist;
results.count = alluserlist.size();
}
else {
// We perform filtering operation
List<user_list_item> uList = new ArrayList<user_list_item>();
for (user_list_item p : filter_user_list) {
if (p.getCust_name().toLowerCase(Locale.getDefault()).contains(charText)) {
uList.add(p);
}
if (p.getCode().toLowerCase(Locale.getDefault()).contains(charText)) {
uList.add(p);
}
}
results.values = uList;
results.count = uList.size();
}
return results;
}
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
// Now we have to inform the adapter about the new list filtered
if (results.count == 0)
notifyDataSetInvalidated();
else {
filter_user_list = (ArrayList<user_list_item>) results.values;
notifyDataSetChanged();
}
}
}
}
在我的search_window Activity类ie.List类中调用适配器类 将onItemclick侦听器设置为
// Binds the Adapter to the ListView
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long l) {
// We know that each row in the adapter is a Map
user_list_item row = adapter.getItem(position);
//Toast.makeText(getApplicationContext(),"You Clicked On.."+row.getCust_name(),Toast.LENGTH_LONG).show();
MainActivity.deposite_search_flag = true; //global static variable
MainActivity.search_name = row.getCust_name(); //global
MainActivity.search_code =row.getCode(); //global
for (int i=0;i<RecordList.size();i++){ //user_list_item only contains name n code
if (row.getCode()==Code_Array[i]){
MainActivity.search_available = avail_bal_Array[i];
}
}
finish(); //switch to caller fragment and executes OnResume method of fragment
}
});
通过在MainActivity类上设置全局变量，我通过直接完成此活动切换到调用者片段（finish（）;）
//In caller fragment class
@Override
public void onResume() {
super.onResume();
if (MainActivity.deposite_search_flag){
txtname.setText(MainActivity.search_name);
txtcode.setText(MainActivity.search_code);
txt_available_bal.setText(MainActivity.search_available);
}
}