通过在EditText中输入，动态显示ListView中匹配的项

package com.zll.filter.list; import java.util.List; import java.util.Vector; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.app.ListActivity; import android.content.Context; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.ListView; import android.widget.TextView; public class CustomList extends ListActivity { private EditText filterText; private LayoutInflater mInflater; private Vector data; private CustomAdapter adapter; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); filterText = (EditText) findViewById(R.id.search_box); filterText.addTextChangedListener(filterTextWatcher); mInflater = (LayoutInflater) getSystemService(Activity.LAYOUT_INFLATER_SERVICE); data = new Vector<RowData>(); RowData rd = new RowData("aaa", "description1"); data.add(rd); rd = new RowData("bbb", "description2"); data.add(rd); rd = new RowData("ccc", "description3"); data.add(rd); rd = new RowData("abc", "description4"); data.add(rd); adapter = new CustomAdapter(this, R.layout.custom_row, R.id.item, data); setListAdapter(adapter); getListView().setTextFilterEnabled(true); } public void onListItemClick(ListView parent, View v, int position, long id) { CustomAdapter adapter = (CustomAdapter) parent.getAdapter(); RowData row = (RowData) adapter.getItem(position); Builder builder = new AlertDialog.Builder(this); builder.setTitle(row.mItem); builder.setMessage(row.mDescription + " -> " + position); builder.setPositiveButton("ok", null); builder.show(); } /** * Data type used for custom adapter. Single item of the adapter. */ private class RowData { protected String mItem; protected String mDescription; RowData(String item, String description) { mItem = item; mDescription = description; } @Override public String toString() { return mItem + " " + mDescription; } } private class CustomAdapter extends ArrayAdapter { public CustomAdapter(Context context, int resource, int textViewResourceId, List objects) { super(context, resource, textViewResourceId, objects); } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; // widgets displayed by each item in your list TextView item = null; TextView description = null; // data from your adapter RowData rowData = (RowData) getItem(position); // we want to reuse already constructed row views... if (null == convertView) { convertView = mInflater.inflate(R.layout.custom_row, null); holder = new ViewHolder(convertView); convertView.setTag(holder); } // holder = (ViewHolder) convertView.getTag(); item = holder.getItem(); item.setText(rowData.mItem); description = holder.getDescription(); description.setText(rowData.mDescription); return convertView; } } /** * Wrapper for row data. * */ private class ViewHolder { private View mRow; private TextView description = null; private TextView item = null; public ViewHolder(View row) { mRow = row; } public TextView getDescription() { if (null == description) { description = (TextView) mRow.findViewById(R.id.description); } return description; } public TextView getItem() { if (null == item) { item = (TextView) mRow.findViewById(R.id.item); } return item; } } private TextWatcher filterTextWatcher = new TextWatcher() { public void afterTextChanged(Editable s) { } public void beforeTextChanged(CharSequence s, int start, int count, int after) { } public void onTextChanged(CharSequence s, int start, int before, int count) { adapter.getFilter().filter(s); } }; @Override protected void onDestroy() { super.onDestroy(); filterText.removeTextChangedListener(filterTextWatcher); } }