带有自定义适配器的 Android 自定义 AutoCompleteTextView

Question

基本上，我希望在edittext中写一些东西，然后将调用一个Web http请求，该请求返回一个JSONObject，其中包含一个JSON数组，其中包含其中某处的值。我需要使用 JSON 对象的结果填充 autocompletetextview 附带的下拉列表。

我可以做第二点，即我可以通过使用扩展 arrayadapter 的自定义适配器类来使用我需要的值填充下拉列表，如下所示。我的问题是第一个问题，如何覆盖 AutoCompleteTextView 使其不显示从数组中过滤的常量值，而是显示我给它的值？我根本不希望它是可过滤的。这是autocompletetextview的源代码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;
    }

}

Answer 1

在您的 PersonAdapter 覆盖 getFilter() 方法中返回您的自定义内部过滤器，您必须在其中实现它的两个方法：performFiltering() 和 publishResults()，performFiltering 在工作线程中运行，在这里您在 publishResults 中调用您的 Web 请求只需调用 clear() 和 add() 项目