我需要根据ListView中的用户输入更新我的SearchDialog。为此，我需要为TextWatcher设置SearchDialog。这该怎么做？
答案 0 :(得分：0)
你可以这样做：
yourEditText.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// process new items for list view
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// push new items into adapter and call notifyDataSetChanged() on it
}
});
答案 1 :(得分：0)
这是我几个月前实现的，以达到您需要的相同目的。当我使用sqlite语句从sqlite数据库填充列表视图时，我必须根据用户输入对列表视图进行排序。不确定它是否是最好的方式，但在我的情况下它完美无缺。
因此，在我的EditText字段中，我添加了此名称（名称为searchBar）：
searchString = "";
searchBar.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void afterTextChanged(Editable s) {
// this is where actually I was changing the sqlite statement which sort my list view
names.clear();
categories.clear();
paths.clear();
count.clear();
cardId.clear();
myCardID.clear();
searchString = s.toString();
Log.e("","searchString : "+searchString);
sqlQuery = getSqlStatement(sort, collId, ascDesc,searchString);
Log.e(""," sqlquery : "+sqlQuery);
sqlQuery = getSqlStatement(sort, collId, ascDesc, searchString);
Cursor cursor = userDbHelper.executeSQLQuery(sqlQuery);
if (cursor.getCount() == 0) {
noCards.setVisibility(View.VISIBLE);
} else if (cursor.getCount() > 0) {
noCards.setVisibility(View.GONE);
for (cursor.move(0); cursor.moveToNext(); cursor.isAfterLast()) {
objectId = Integer.parseInt(cursor.getString(cursor.getColumnIndex("objectId")));
cardId.add(objectId);
title = cursor.getString(cursor.getColumnIndex("title"));
catTitle = cursor.getString(cursor.getColumnIndex("catTitle"));
if(extra!=0 && sort!=3){
tags.setText(catTitle);
}
int repeats = Integer.parseInt(cursor.getString(cursor.getColumnIndex("repeatsCount")));
count.add(repeats);
String cardsm = "SELECT objectId FROM cardmedias " +
"WHERE cardId="+
objectId +
" AND mediaType=" +
5012;
Cursor cardsM = userDbHelper.executeSQLQuery(cardsm);
if (cardsM.getCount() == 0) {
String defCard = "SELECT objectId FROM collectionmedias " +
"WHERE collectionId="+
collId +
" AND mediaType=" +
3003;
Cursor getDefCard = userDbHelper.executeSQLQuery(defCard);
getDefCard.moveToFirst();
objectID = Integer.parseInt(getDefCard.getString(getDefCard
.getColumnIndex("objectId")));
String filename = "mediacollection-"+objectID;
if(storageID==1){
path = RPCCommunicator.getImagePathFromInternalStorage(servername, userId, filename, getApplicationContext());
} else if(storageID==2){
path = RPCCommunicator.getImagePathFromExternalStorage(servername, userId, filename);
}
hm.put(objectID, path);
path = hm.get(objectID);
paths.add(path);
names.add(title);
categories.add(catTitle);
} else if (cardsM.getCount() > 0) {
for (cardsM.move(0); cardsM.moveToNext(); cardsM.isAfterLast()) {
objectID = Integer.parseInt(cardsM.getString(cardsM
.getColumnIndex("objectId")));
String filename = "mediacard-"+objectID;
if(storageID==1){
path = RPCCommunicator.getImagePathFromInternalStorage(servername, userId, filename, getApplicationContext());
} else if(storageID==2){
path = RPCCommunicator.getImagePathFromExternalStorage(servername, userId, filename);
}
hm.put(objectID, path);
path = hm.get(objectID);
paths.add(path);
names.add(title);
categories.add(catTitle);
}
}
cardsM.close();
}
}
cursor.close();
// don't forget to add this!!!
adapter.notifyDataSetChanged();
}
});
在我的onCreate()实际上，我在TextWatcher做同样的事情来排序我的列表视图，所以我认为你可以实现和我一样的逻辑。
如果您有任何问题，请粘贴一些代码，以便我们为您提供帮助！ ：）
希望这有帮助！