我想更改AutoCompleteTextView中的默认过滤。默认筛选查找以给定标记开始的所有字符串。我的项目要求过滤应该找到包含给定标记的所有字符串。
有可能吗？
答案 0 :(得分：16)
我找到了解决方案，感谢Google和搜索两天。正如@ torque203建议的那样，我已经实现了自己的自定义适配器。首先在适配器中为自定义项定义一个新的XML文件：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Medium Text"
android:paddingLeft="8dp"
android:paddingRight="8dp"
android:paddingTop="16dp"
android:paddingBottom="16dp"
android:id="@+id/lbl_name" />
</RelativeLayout>
为您的姓名创建新课程：
public class Names {
public String name;
}
public class NamesAdapter extends ArrayAdapter<Names> {
Context context;
int resource, textViewResourceId;
List<Names> items, tempItems, suggestions;
public NamesAdapter(Context context, int resource, int textViewResourceId, List<Names> items) {
super(context, resource, textViewResourceId, items);
this.context = context;
this.resource = resource;
this.textViewResourceId = textViewResourceId;
this.items = items;
tempItems = new ArrayList<Names>(items); // this makes the difference.
suggestions = new ArrayList<Names>();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.autocomplete_item, parent, false);
}
Names names = items.get(position);
if (names != null) {
TextView lblName = (TextView) view.findViewById(R.id.lbl_name);
if (lblName != null)
lblName.setText(names.name);
}
return view;
}
@Override
public Filter getFilter() {
return nameFilter;
}
/**
* Custom Filter implementation for custom suggestions we provide.
*/
Filter nameFilter = new Filter() {
@Override
public CharSequence convertResultToString(Object resultValue) {
String str = ((Names) resultValue).name;
return str;
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
if (constraint != null) {
suggestions.clear();
for (Names names : tempItems) {
if (names.name.toLowerCase().contains(constraint.toString().toLowerCase())) {
suggestions.add(names);
}
}
FilterResults filterResults = new FilterResults();
filterResults.values = suggestions;
filterResults.count = suggestions.size();
return filterResults;
} else {
return new FilterResults();
}
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
List<Names> filterList = (ArrayList<Names>) results.values;
if (results != null && results.count > 0) {
clear();
for (Names names : filterList) {
add(names);
notifyDataSetChanged();
}
}
}
};
}
....
List<Names> namesList = //your names list;
NamesAdapter namesAdapter = new NamesAdapter(
SearchActivity.this,
R.layout.activity_search,
R.id.lbl_name,
namesList
);
//set adapter into listStudent
autoCompleteTextView.setAdapter(namesAdapter);
autoCompleteTextView.showDropDown();
...
答案 1 :(得分：0)
是的，这是可能的。
第一种方式：
您应该创建一个实现ListAdapter和Filterable的自定义适配器。
Filter可以实现“包含”过滤器逻辑。
并将此适配器设置为AutoCompleteTextView的适配器。
第二种方式：
如果您已使用ArrayAdapter。您可以覆盖它的getFilter()方法。
答案 2 :(得分：0)
只是为了扩展Caffe Latte的好答案：
1）不需要autoCompleteTextView.showDropDown();。
2）要检索输入对象，可以使用：
//retrieve the input in the autoCompleteTextView
autoCompleteTextView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
//parent The AdapterView where the click happened.
//view The view within the AdapterView that was clicked (this will be a view provided by the adapter)
//position The position of the view in the adapter
//id The row id of the item that was clicked.
public void onItemClick(AdapterView<?> parent, View view, int position, long rowId) {
String selection =parent.getItemAtPosition(position).toString();
Toast.makeText(parent.getContext(),"" + selection,Toast.LENGTH_SHORT).show();
}
});
从父级检索的对象必须实现toString（）方法。
答案 3 :(得分：0)
//试试这个
s := fmt.Sprintf("%d-%02d-%02d %02d:%02d:%02d\n",
t.Year(), t.Month(), t.Day(),
t.Hour(), t.Minute(), t.Second())
£ 这对我有用
答案 4 :(得分：0)
这是@Caffe Latte发布的内容的一个简单的Kotlin版本。
您不需要自定义布局文件，只需使用默认的android.R.layout.simple_list_item_1。
为该适配器提供任何类，包括纯字符串。它将仅使用toString()确定显示文本。
import android.content.Context
import android.widget.ArrayAdapter
import android.widget.Filter
import androidx.annotation.IdRes
import androidx.annotation.LayoutRes
import java.util.*
class AutoCompleteAdapter(
context: Context,
@LayoutRes resource: Int,
@IdRes textViewResourceId: Int = 0,
internal var items: List<Any> = listOf()
)
: ArrayAdapter<Any>(context, resource, textViewResourceId, items) {
internal var tempItems: MutableList<Any> = mutableListOf()
internal var suggestions: MutableList<Any> = mutableListOf()
/**
* Custom Filter implementation for custom suggestions we provide.
*/
private var filter: Filter = object : Filter() {
override fun performFiltering(constraint: CharSequence?): FilterResults {
return if (constraint != null) {
suggestions.clear()
tempItems.forEach {
if (it.toString().toLowerCase(Locale.getDefault()).contains(constraint.toString().toLowerCase(Locale.getDefault()))) {
suggestions.add(it)
}
}
val filterResults = FilterResults()
filterResults.values = suggestions
filterResults.count = suggestions.size
filterResults
} else {
FilterResults()
}
}
override fun publishResults(constraint: CharSequence?, results: FilterResults) {
val filterList = results.values as? List<Any>
if (results.count > 0) {
clear()
filterList?.forEach {
add(it)
}.also {
notifyDataSetChanged()
}
}
}
}
init {
tempItems = items.toMutableList()
suggestions = ArrayList()
}
override fun getFilter(): Filter {
return filter
}
}