[英]AutoCompleteTextView not working as expected
我正在使用AutoCompleteTextView的應用程序上工作,面臨的問題很少。 請在下面找到問題的詳細信息。
數據中包含以下值:
1)曼尼什·洛根·in那
2)MJ(洛根·弗恩(Logan Fern))
3)洛根
問題:
1)當用戶搜索Manish時,Manish Logan Jain被顯示為建議。 但是,當用戶輸入Logan Jain時,不會返回任何結果。
2)當用戶輸入Logan時,我希望第二個值顯示為建議,但是目前,建議列表什么都沒有顯示。
3)當用戶輸入ogan時,我希望顯示建議3。 目前,它沒有顯示。
AutoCompleteView xml:
AutoCompleteTextView
android:id="@+id/autoCompleteTextView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:ems="10"
android:hint="@string/enter_user_name" >
<requestFocus />
</AutoCompleteTextView>
填充數據的Java代碼:
List<String> namesList = new ArrayList<String>(stops);
namesList.add("Manish Logan Jain");
namesList.add("Logan");
namesList.add("M. J. (Logan Fern)");
ArrayAdapter<String> namesSuggestion = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, namesList);
AutoCompleteTextView textView = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
textView.setAdapter(namesSuggestion);
textView.setThreshold(1);
有人遇到過類似的問題嗎? 如果是的話,那么可能的解決方案是什么?
使用實現Filterable的自定義適配器。 在getFilter方法中,根據需要使用String.contains()。
請檢查此鏈接。
對您的ACTV使用CursorAdapter並調用setFilterQueryProvider(FilterQueryProvider)進行自定義過濾(對過濾的數據使用MatrixCursor)
編輯:示例FilterQueryProvider
class FQP extends LinkedList<String> implements FilterQueryProvider {
@Override
public Cursor runQuery(CharSequence constraint) {
if (constraint == null) {
return null;
}
Log.d("TAG", "runQuery " + constraint);
String lowerConstraint = constraint.toString().toLowerCase();
String[] columns = {
"_id", "name"
};
int id = 0;
MatrixCursor c = new MatrixCursor(columns);
for (String name : this) {
String lowerName = name.toLowerCase();
if (lowerName.indexOf(lowerConstraint) != -1) {
c.newRow().add(id++).add(name);
}
}
return c;
}
};
在onCreate中對其進行以下測試:
LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
AutoCompleteTextView actv = new AutoCompleteTextView(this);
String[] from = {"name"};
int[] to = {android.R.id.text1};
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, android.R.layout.simple_dropdown_item_1line, null, from, to);
FQP fqp = new FQP();
fqp.add("Manish Logan Jain");
fqp.add("Logan");
fqp.add("M. J. (Logan Fern)");
adapter.setFilterQueryProvider(fqp);
actv.setAdapter(adapter);
actv.setThreshold(1);
ll.addView(actv);
setContentView(ll);
您尋找的是不能直接完成的。 但我建議您使用MultiCompleteTextView。
請參閱此鏈接: http : //www.c-sharpcorner.com/uploadfile/manish1231/autocomplete-and-multicomplete-textview-in-mono-for-android/
試用以下代碼:
public class AutoCompleteAdapter extends ArrayAdapter<Address> implements Filterable {
private LayoutInflater mInflater;
private Geocoder mGeocoder;
private StringBuilder mSb = new StringBuilder();
public AutoCompleteAdapter(final Context context) {
super(context, -1);
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mGeocoder = new Geocoder(context);
}
@Override
public View getView(final int position, final View convertView, final ViewGroup parent) {
final TextView tv;
if (convertView != null) {
tv = (TextView) convertView;
} else {
tv = (TextView) mInflater.inflate(android.R.layout.simple_dropdown_item_1line, parent, false);
}
tv.setText((createFormattedAddressFromAddress(getItem(position))));
return tv;
}
private String createFormattedAddressFromAddress(final Address address) {
mSb.setLength(0);
final int addressLineSize = address.getMaxAddressLineIndex();
for (int i = 0; i < addressLineSize; i++) {
mSb.append(address.getAddressLine(i));
if (i != addressLineSize - 1) {
mSb.append(", ");
}
}
return mSb.toString();
}
@Override
public Filter getFilter() {
Filter myFilter = new Filter() {
@Override
protected FilterResults performFiltering(final CharSequence constraint) {
List<Address> addressList = null;
if (constraint != null) {
try {
addressList = mGeocoder.getFromLocationName((String) constraint, 5,23.0,72.0,23.9,72.9);
} catch (IOException e) {
}
}
if (addressList == null) {
addressList = new ArrayList<Address>();
}
final FilterResults filterResults = new FilterResults();
filterResults.values = addressList;
filterResults.count = addressList.size();
return filterResults;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(final CharSequence contraint, final FilterResults results) {
clear();
for (Address address : (List<Address>) results.values) {
add(address);
}
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
@Override
public CharSequence convertResultToString(final Object resultValue) {
return resultValue == null ? "" : ((createFormattedAddressFromAddress((Address) resultValue).split(", Ahmedabad")[0].length()<6)?createFormattedAddressFromAddress((Address) resultValue).split(", Gujarat")[0]:createFormattedAddressFromAddress((Address) resultValue).split(", Ahmedabad")[0]);
}
};
return myFilter;
}
}
通過將輸入字符串視為前綴來返回默認結果字符串集。 這是在ArrayFilter對象中實現的。 代碼就像
/**
* <p>An array filter constrains the content of the array adapter with
* a prefix. Each item that does not start with the supplied prefix
* is removed from the list.</p>
*/
private class ArrayFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence prefix) {
FilterResults results = new FilterResults();
if (mOriginalValues == null) {
synchronized (mLock) {
mOriginalValues = new ArrayList<T>(mObjects);
}
}
if (prefix == null || prefix.length() == 0) {
synchronized (mLock) {
ArrayList<T> list = new ArrayList<T>(mOriginalValues);
results.values = list;
results.count = list.size();
}
} else {
String prefixString = prefix.toString().toLowerCase();
final ArrayList<T> values = mOriginalValues;
final int count = values.size();
final ArrayList<T> newValues = new ArrayList<T>(count);
for (int i = 0; i < count; i++) {
final T value = values.get(i);
final String valueText = value.toString().toLowerCase();
// First match against the whole, non-splitted value
if (valueText.startsWith(prefixString)) {
newValues.add(value);
} else {
final String[] words = valueText.split(" ");
final int wordCount = words.length;
for (int k = 0; k < wordCount; k++) {
if (words[k].startsWith(prefixString)) {
newValues.add(value);
break;
}
}
}
}
results.values = newValues;
results.count = newValues.size();
}
return results;
}
如果要將返回字符串更改為包含輸入字符串的集合,則需要自定義ArrayFilter。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.