【发布时间】：2013-10-08 00:08:53
【问题描述】：
我在自定义 arrayAdapter 中实现自定义 getFilter 时遇到问题。其实我不知道如何实现它。尝试了各种代码，但仍然没有运气。这是我的自定义数组适配器。
package com.test.FilterableList.Adapters;
import java.util.ArrayList;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import com.test.FilterableList.Models.ListTO;
import com.test.FilterableList.R;
import android.widget.Filterable;
public class FilterableAdapter extends ArrayAdapter<ListTO> implements Filterable {
// declaring our ArrayList of items
public ArrayList<ListTO> objects;
/* here we must override the constructor for ArrayAdapter
* the only variable we care about now is ArrayList<Item> objects,
* because it is the list of objects we want to display.
*/
public FilterableAdapter(Context context, int textViewResourceId, ArrayList<ListTO> objects) {
super(context, textViewResourceId, objects);
this.objects = objects;
}
/*
* we are overriding the getView method here - this is what defines how each
* list item will look.
*/
public View getView(int position, View convertView, ViewGroup parent){
// assign the view we are converting to a local variable
View v = convertView;
// first check to see if the view is null. if so, we have to inflate it.
// to inflate it basically means to render, or show, the view.
if (v == null) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.list_item, null);
}
/*
* Recall that the variable position is sent in as an argument to this method.
* The variable simply refers to the position of the current object in the list. (The ArrayAdapter
* iterates through the list we sent it)
*
* Therefore, i refers to the current Item object.
*/
ListTO i = objects.get(position);
if (i != null) {
// This is how you obtain a reference to the TextViews.
// These TextViews are created in the XML files we defined.
TextView tt = (TextView) v.findViewById(R.id.list_name);
if (tt != null){
tt.setText(i.FileName);
}
}
// the view must be returned to our activity
return v;
}
}
这是 ListTO 类。
package com.test.FilterableList.Models;
public class ListTO {
public int Id;
public String FileName;
public String FileUri;
public ListTO(int id, String fileName, String fileUri) {
Id = id;
FileName = fileName;
FileUri = fileUri;
}
}
这是布局。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/blacklikenbackground"
tools:context=".AllListActivity" >
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Search"
android:id="@+id/inputSearch"
/>
<ListView
android:id="@+id/test_list"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ListView>
</LinearLayout>
这里的搜索关键字来自“inputSearch”EditText。
这是文本更改的侦听器。
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
// Toast.makeText(getActivity(), cs.toString(), Toast.LENGTH_LONG).show();
m_adapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
谢谢。
【问题讨论】：
-
您到底想达到什么目标？过滤器数据将来自哪里，您希望过滤器做什么？
-
我还建议您看看这个出色的答案：stackoverflow.com/a/14369336/72746 - 这可能就是您要找的。span>
-
@Axarydax 抱歉，布局已添加到问题中。实际上 Search 关键字来自“inputSearch”EditText。我想实现谷歌中使用的自动建议功能；但是从列表视图来看。
-
ArrayAdapter 抽象了所有这些功能，您只需要覆盖 ListTO 上的 toString()。查看它的实现grepcode.com/file/repository.grepcode.com/java/ext/…@chandu tangudu 答案是正确的
标签： android android-listview android-arrayadapter