Android的定制AutoCompleteTextView与自定义适配器 [英] Android Custom AutoCompleteTextView with Custom Adapter
问题描述
基本上，我想在EditText上写东西，然后一个网页的http请求将被调用，它返回一个JSONObject其中包含一个JSON数组，其中含有内某处的值。我需要populat随从JSON对象的结果autocompletetextview的下拉列表。
我可以做的第二位，即我可以填充我需要通过扩展arrayadapter如u可以看到下面的自定义适配器类值的下拉列表。我的问题是第一位的，我怎么能覆盖AutoCompleteTextView这样，它不告诉我从数组常量过滤值，而显示我，我给它的价值？我不希望它是过滤的。这里是源$ C $ C为autocompletetextview <一个href=\"http://grep$c$c.com/file/repository.grep$c$c.com/java/ext/com.google.android/android/4.0.4_r2.1/android/widget/AutoCompleteTextView.java#91\" rel=\"nofollow\">http://grep$c$c.com/file/repository.grep$c$c.com/java/ext/com.google.android/android/4.0.4_r2.1/android/widget/AutoCompleteTextView.java#91
公共类PersonAdapter扩展ArrayAdapter
{ //我们使用构造允许提供数据对象的名单
//要绑定。
公共PersonAdapter（上下文的背景下，INT textViewResourceId，
列表对象）{
超（背景下，textViewResourceId，对象）;
} @覆盖
公共查看getView（INT位置，查看convertView，父母的ViewGroup）{ //检索在此位置绑定Person对象
最后的人P =的getItem（位置）; //一个ViewHolder保持对孩子的参考意见，以避免不必要的
//调用
//在每个行findViewById（）。
ViewHolder持有人; //当convertView不为空，我们可以直接重用，也没有
//需要
//为reinflate它。当convertView我们只吹一个新的View
//提供
//通过ListView控件为空。
如果（convertView == NULL）{
convertView = View.inflate（的getContext（），R.layout.list_item，父母，假）; //创建两个孩子ViewHolder和存储引用
//意见
//我们需要将数据绑定到。
持有人=新ViewHolder（）;
holder.textName =（TextView中）convertView
.findViewById（R.id.textName）;
holder.textEmail =（TextView中）convertView
.findViewById（R.id.textEmail）;
holder.picture =（ImageView的）convertView.findViewById（R.id.image）;
holder.picture.setFocusable（假）;
holder.picture.setFocusableInTouchMode（假）;
convertView.setTag（保持器）;
}其他{
//获取ViewHolder回才能到TextView的快速访问
//和ImageView的。
支架=（ViewHolder）convertView.getTag（）;
} //与支架有效地结合的数据。
holder.textName.setText（p.getName（））;
holder.textEmail.setText（p.getEmail（））;
holder.picture.setImageResource（p.getResImage（））;
//点击图片
holder.picture.setOnClickListener（新OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
Toast.makeText（的getContext（），
点击了+ p.getName（）+的图片，
Toast.LENGTH_SHORT）.show（）; }
}）; 返回convertView;
} / **
*
*内支架类在ListView单行视图
*
* /
静态类ViewHolder {
TextView的textName，textEmail;
ImageView的图片;
}}
在您的PersonAdapter覆盖用getFilter（）方法返回你的，你必须要实现的两个方法的定制内部过滤器：performFiltering（）和publishResults（），performFiltering运行在工作线程，在这里你打电话给你的Web请求，在publishResults只需调用清除（），并添加（）的项目
Basically, I wish to write something in the edittext, then a web http request will be called that returns a JSONObject which contains a JSON array, which contain the values somewhere inside it. I need to populat the dropdown list that comes with autocompletetextview with the results from the JSON Object.
I can do the second bit, i.e. I can populate the dropdown list with the values I need by using a custom adapter class that extends arrayadapter as u can see below. My problem is with the first bit, how can I override AutoCompleteTextView such that it doesn't show me filtered constant values from an array, rather shows me the values that I give it ? I don't want it to be filterable at all. Here is the sourcecode for autocompletetextview http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/4.0.4_r2.1/android/widget/AutoCompleteTextView.java#91
public class PersonAdapter extends ArrayAdapter
{
// we use the constructor allowing to provide a List of objects for the data
// to be binded.
public PersonAdapter(Context context, int textViewResourceId,
List objects) {
super(context, textViewResourceId, objects);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// retrieve the Person object binded at this position
final Person p = getItem(position);
// A ViewHolder keeps references to children views to avoid unneccessary
// calls
// to findViewById() on each row.
ViewHolder holder;
// When convertView is not null, we can reuse it directly, there is no
// need
// to reinflate it. We only inflate a new View when the convertView
// supplied
// by ListView is null.
if (convertView == null) {
convertView = View.inflate(getContext(), R.layout.list_item, parent, false);
// Creates a ViewHolder and store references to the two children
// views
// we want to bind data to.
holder = new ViewHolder();
holder.textName = (TextView) convertView
.findViewById(R.id.textName);
holder.textEmail = (TextView) convertView
.findViewById(R.id.textEmail);
holder.picture = (ImageView) convertView.findViewById(R.id.image);
holder.picture.setFocusable(false);
holder.picture.setFocusableInTouchMode(false);
convertView.setTag(holder);
} else {
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
// Bind the data efficiently with the holder.
holder.textName.setText(p.getName());
holder.textEmail.setText(p.getEmail());
holder.picture.setImageResource(p.getResImage());
//click on the picture
holder.picture.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getContext(),
"Clicked on " + p.getName() + "'s picture",
Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
/**
*
* Inner holder class for a single row view in the ListView
*
*/
static class ViewHolder {
TextView textName, textEmail;
ImageView picture;
}
}
in your PersonAdapter override getFilter() method returning your custom inner Filter where you have to implement its two methods: performFiltering() and publishResults(), performFiltering is run in the worker thread and here you call your web request, in publishResults just call clear() and add() the items
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