我很难找到这个好的教程。我有一个ListView,我想添加一个'搜索'功能,根据用户在操作栏中找到的搜索小部件的输入过滤列表视图。ListView搜索部件过滤器
我已经浏览了一些教程和几篇文章,但无法围绕这个概念包裹我的头。我最近的努力是根据this site。
以下是我的自定义适配器代码(请注意,它可能有不必要的代码,由于我在得到它的工作的尝试:
package adapters;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;
import com.example.khalid.hisnulmuslim.R;
import java.util.ArrayList;
import java.util.List;
import classes.Dua;
public class DuaGroupAdapter extends ArrayAdapter<Dua> implements Filterable {
/* Filterable things */
private List<Dua> allModelItemsArray;
private List<Dua> filteredModelItemsArray;
private Activity context;
private ModelFilter filter;
private LayoutInflater inflator;
public DuaGroupAdapter(Activity context, List<Dua> list) {
super(context, R.layout.dua_list_item_card, list);
this.context = context;
this.allModelItemsArray = new ArrayList<Dua>();
allModelItemsArray.addAll(list);
this.filteredModelItemsArray = new ArrayList<Dua>();
filteredModelItemsArray.addAll(allModelItemsArray);
inflator = context.getLayoutInflater();
getFilter();
}
/* End of Filterable things */
public DuaGroupAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
}
public DuaGroupAdapter(Context context, int resource, List<Dua> items) {
super(context, resource, items);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi;
vi = LayoutInflater.from(getContext());
v = vi.inflate(R.layout.dua_list_item_card, null);
}
Dua p = getItem(position);
if (p != null) {
TextView tvReference = (TextView) v.findViewById(R.id.txtReference);
TextView tvDuaName = (TextView) v.findViewById(R.id.txtDuaName);
if (tvReference != null) {
tvReference.setText("" + p.getReference());
}
if (tvDuaName != null) {
tvDuaName.setText(p.getTitle());
}
}
return v;
}
private class ModelFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
constraint = constraint.toString().toLowerCase();
FilterResults result = new FilterResults();
if (constraint != null && constraint.toString().length() > 0) {
ArrayList<Dua> filteredItems = new ArrayList<Dua>();
for (int i = 0, l = allModelItemsArray.size(); i < l; i++) {
Dua m = allModelItemsArray.get(i);
if (m.getGroup().toLowerCase().contains(constraint))
filteredItems.add(m);
}
result.count = filteredItems.size();
result.values = filteredItems;
} else {
synchronized (this) {
result.values = allModelItemsArray;
result.count = allModelItemsArray.size();
}
}
return result;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filteredModelItemsArray = (ArrayList<Dua>) results.values;
notifyDataSetChanged();
clear();
for (int i = 0, l = filteredModelItemsArray.size(); i < l; i++)
add(filteredModelItemsArray.get(i));
notifyDataSetInvalidated();
}
}
}
这是我的布局XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ListView
android:id="@+id/duaListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
android:background="@android:color/white"/>
</RelativeLayout>
的过滤器所需的文本将从操作栏中的搜索小部件中获得,该活动能够检测何时将文本输入到搜索小部件文本字段中,但它什么都不显示; listView空白,它返回原始一旦所有文本被删除,状态为
ListView中的各行不只有两个textViews那么复杂如下面给出
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:padding="15dp"
android:background="?android:attr/selectableItemBackground">
<TextView
android:id="@+id/txtReference"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-condensed"
android:text="1"
android:textStyle="bold" />
<View
android:layout_width="15dp"
android:layout_height="fill_parent" />
<TextView
android:id="@+id/txtDuaName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-light"
android:text="Entering the Bathroom" />
</LinearLayout>
是否有人可以帮助我吗?谢谢你的时间。
你有没有调试过你的任何循环来找出这些数组是否被填充?你的getItem和添加方法在哪里?另外,我相信你可能会将你的notifyDataSetChanged和notifyDataSetInvalidated调用翻转过来,在为你的适配器设置数据之后应该调用它 – Shooky