5
這裏是代碼，我使用了一個自定義適配器，並應用了Filter方法，現在ListView在輸入退格鍵時不會更新，當從切換回來時項目活動。我讀過它是一個過濾器中的錯誤，但我怎麼繞過它，我知道已經實現了我想要的這種設置的應用程序。繞過不更新ListView的過濾中的錯誤Android
public class IndexPageActivity extends Activity implements OnItemClickListener{
ListView listView;
EditText editTextB;
PagesAdapter adapter1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.pageList);
editTextB = (EditText) findViewById(R.id.searchB);
adapter1 = new PagesAdapter(this);
listView.setAdapter(adapter1);
adapter1.notifyDataSetChanged();
listView.setOnItemClickListener(this);
editTextB.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
IndexPageActivity.this.adapter1.getFilter().filter(cs.toString());
adapter1.notifyDataSetChanged();
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3) { }
@Override
public void afterTextChanged(Editable arg0) { }
});
}
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position, long arg3) {
Intent i;
String name = adapter1.getItem(position);
Log.d("id", name);
if (name.equals("Item1"))
{
i = new Intent(this, anActivity.class);
startActivity(i);
}
else if (name.equals("Item2"))
{
i = new Intent(this, anActivity2.class);
startActivity(i);
}
}
}
class SingleRow {
String pagedata;
SingleRow(String pagedata){
this.pagedata=pagedata;
}
}
class PagesAdapter extends BaseAdapter implements Filterable{
ArrayList<String> pagelist;
List<String> arrayList;
Context context;
String [] pagedatas;
PagesAdapter(Context c){
context=c;
pagelist = new ArrayList<String>();
Resources res = c.getResources();
pagedatas = res.getStringArray(R.array.pages_data);
for (int i=0;i<463;i++){
pagelist.add(pagedatas[i]);
}
}
@Override
public int getCount() {
return pagelist.size();
}
@Override
public String getItem(int i) {
return pagelist.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewG) {
LayoutInflater inflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row=inflater.inflate(R.layout.single_row,viewG,false);
TextView pagetitle = (TextView) row.findViewById(R.id.textViewRow);
String temp=pagelist.get(i);
pagetitle.setText(temp);
return row;
}
public class filter_here extends Filter{
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults Result = new FilterResults();
// if constraint is empty return the original names
if(constraint.length() == 0){
Result.values = pagelist;
Result.count = pagelist.size();
return Result;
}
ArrayList<String> Filtered_Names = new ArrayList<String>();
String filterString = constraint.toString().toLowerCase();
String filterableString;
for(int i = 0; i<pagelist.size(); i++){
filterableString = pagelist.get(i);
if(filterableString.toLowerCase().contains(filterString)){
Filtered_Names.add(filterableString);
}
}
Result.values = Filtered_Names;
Result.count = Filtered_Names.size();
return Result;
}
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
pagelist = (ArrayList<String>) results.values;
notifyDataSetChanged();
}
}
@Override
public Filter getFilter() {
return new filter_here();
}
}
謝謝你，我會投入這一點，並儘快給您儘快！非常感謝..所有積分給你Coderji！ –
告訴我做到了嗎？！ – Coderji
是的Coderji！它確實起作用了，另一件事發生了，當我在editText中輸入Twinkle時，它帶來了相關的項目，當我使用退格將它們全部刪除時，顯示的列表將是以第一個字母「T」開始的項目在一瞬間。如果在editText中輸入Chocolate，則退出時，只有以「C」開頭的項目纔會顯示在ListView中。老闆幹得好！ –