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The source code is released under:
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/* * Copyright 2010, 2011 mapsforge.org/*from ww w .j av a 2 s.c o m*/ * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.mapsforge.geocoding.widget; import java.util.List; import org.mapsforge.geocoding.Unchecked; import android.util.Log; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Filter; import android.widget.Filterable; import android.widget.TextView; public abstract class SqliteCompletionAdapter<T> extends BaseAdapter implements Filterable { private static final String ANDROID_LOG_TAG = "geocoding"; private InternalFilter filter = null; private List<T> currentResults = null; public abstract String getString(T element); public abstract List<T> getResults(String needle); // setter for filter void setCurrentResults(List<T> results) { this.currentResults = results; } @Override public int getCount() { Log.d(ANDROID_LOG_TAG, "getCount"); if (this.currentResults == null) { return 0; } return this.currentResults.size(); } @Override public Object getItem(int i) { Log.d(ANDROID_LOG_TAG, "getItem " + i); if (this.currentResults == null) { return null; } return getString(this.currentResults.get(i)); } public T getItemDataObject(int i) { if (this.currentResults == null) { return null; } return this.currentResults.get(i); } @Override public long getItemId(int i) { Log.d(ANDROID_LOG_TAG, "getItemId " + i); return 0; } @Override public View getView(int pos, View view, ViewGroup parent) { String name = getString(this.currentResults.get(pos)); Log.d(ANDROID_LOG_TAG, "getView " + name); TextView textView = new TextView(parent.getContext()); textView.setPadding(0, 10, 0, 10); textView.setText(name); return textView; } /* * Filterable interface */ @Override public Filter getFilter() { Log.d(ANDROID_LOG_TAG, "getFilter"); if (this.filter == null) { this.filter = new InternalFilter(); } return this.filter; } class InternalFilter extends Filter { @Override protected android.widget.Filter.FilterResults performFiltering(CharSequence prefix) { // this gets called by a worker thread!!! take care. Log.d(ANDROID_LOG_TAG, "perform " + prefix); String needle = prefix == null ? null : prefix.toString(); List<T> results = getResults(needle); FilterResults filterResults = new FilterResults(); filterResults.values = results; filterResults.count = results.size(); Log.d(ANDROID_LOG_TAG, "perform finish"); return filterResults; } @Override protected void publishResults(CharSequence constraint, FilterResults filterResults) { Log.d(ANDROID_LOG_TAG, "publish"); List<T> results = Unchecked.cast(filterResults.values); SqliteCompletionAdapter.this.setCurrentResults(results); if (results.size() == 0) { notifyDataSetInvalidated(); } else { notifyDataSetChanged(); } } } }