package com.droid;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.regex.Pattern;
import android.app.Activity;
import android.content.AsyncQueryHandler;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.graphics.PixelFormat;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import com.droid.MyLetterListView.OnTouchingLetterChangedListener;
public class Activity01 extends Activity {
private BaseAdapter adapter;
private ListView personList;
private TextView overlay;
private MyLetterListView letterListView;
private AsyncQueryHandler asyncQuery;
private static final String NAME = "name", NUMBER = "number", SORT_KEY = "sort_key";
private HashMap<String, Integer> alphaIndexer;
private String[] sections;
private Handler handler;
private OverlayThread overlayThread;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
personList = (ListView) findViewById(R.id.list_view);
letterListView = (MyLetterListView) findViewById(R.id.MyLetterListView01);
letterListView.setOnTouchingLetterChangedListener(new LetterListViewListener());
asyncQuery = new MyAsyncQueryHandler(getContentResolver());
alphaIndexer = new HashMap<String, Integer>();
handler = new Handler();
overlayThread = new OverlayThread();
initOverlay();
}
@Override
protected void onResume() {
super.onResume();
Uri uri = Uri.parse("content://com.android.contacts/data/phones");
String[] projection = { "_id", "display_name", "data1", "sort_key" };
asyncQuery.startQuery(0, null, uri, projection, null, null,
"sort_key COLLATE LOCALIZED asc");
}
private class MyAsyncQueryHandler extends AsyncQueryHandler {
public MyAsyncQueryHandler(ContentResolver cr) {
super(cr);
}
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
List<ContentValues> list = new ArrayList<ContentValues>();
cursor.moveToFirst();
for(int j=0;j<5;j++){
ContentValues cv = new ContentValues();
cv.put(NAME, "wangxiaoming");
cv.put(NUMBER, j+"number");
cv.put(SORT_KEY, "wangxiaoming_key");
list.add(cv);
}
for(int j=0;j<3;j++){
ContentValues cv = new ContentValues();
cv.put(NAME, "lihua");
cv.put(NUMBER, j+"number");
cv.put(SORT_KEY, "lihua_key");
list.add(cv);
}
for(int j=0;j<5;j++){
ContentValues cv = new ContentValues();
cv.put(NAME, "zhongguo");
cv.put(NUMBER, j+"number");
cv.put(SORT_KEY, "zhongguo_key");
list.add(cv);
}
if (list.size() > 0) {
setAdapter(list);
}
// }
}
}
private void setAdapter(List<ContentValues> list) {
adapter = new ListAdapter(this, list);
personList.setAdapter(adapter);
}
private class ListAdapter extends BaseAdapter {
private LayoutInflater inflater;
private List<ContentValues> list;
public ListAdapter(Context context, List<ContentValues> list) {
this.inflater = LayoutInflater.from(context);
this.list = list;
alphaIndexer = new HashMap<String, Integer>();
sections = new String[list.size()];
for (int i = 0; i < list.size(); i++) {
String currentStr = getAlpha(list.get(i).getAsString(SORT_KEY));
String previewStr = (i - 1) >= 0 ? getAlpha(list.get(i - 1).getAsString(SORT_KEY)) : " ";
if (!previewStr.equals(currentStr)) {
String name = getAlpha(list.get(i).getAsString(SORT_KEY));
alphaIndexer.put(name, i);
sections[i] = name;
}
}
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_item, null);
holder = new ViewHolder();
holder.alpha = (TextView) convertView.findViewById(R.id.alpha);
holder.name = (TextView) convertView.findViewById(R.id.name);
holder.number = (TextView) convertView.findViewById(R.id.number);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
ContentValues cv = list.get(position);
holder.name.setText(cv.getAsString(NAME));
holder.number.setText(cv.getAsString(NUMBER));
String currentStr = getAlpha(list.get(position).getAsString(SORT_KEY));
String previewStr = (position - 1) >= 0 ? getAlpha(list.get(position - 1).getAsString(SORT_KEY)) : " ";
if (!previewStr.equals(currentStr)) {
holder.alpha.setVisibility(View.VISIBLE);
holder.alpha.setText(currentStr);
} else {
holder.alpha.setVisibility(View.GONE);
}
return convertView;
}
private class ViewHolder {
TextView alpha;
TextView name;
TextView number;
}
}
private void initOverlay() {
LayoutInflater inflater = LayoutInflater.from(this);
overlay = (TextView) inflater.inflate(R.layout.overlay, null);
overlay.setVisibility(View.INVISIBLE);
WindowManager.LayoutParams lp = new WindowManager.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.TYPE_APPLICATION,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
PixelFormat.TRANSLUCENT);
WindowManager windowManager = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
windowManager.addView(overlay, lp);
}
private class LetterListViewListener implements OnTouchingLetterChangedListener{
@Override
public void onTouchingLetterChanged(final String s) {
if(alphaIndexer.get(s) != null) {
int position = alphaIndexer.get(s);
personList.setSelection(position);
overlay.setText(sections[position]);
overlay.setVisibility(View.VISIBLE);
handler.removeCallbacks(overlayThread);
handler.postDelayed(overlayThread, 500);
}
}
}
private class OverlayThread implements Runnable {
@Override
public void run() {
overlay.setVisibility(View.GONE);
}
}
private String getAlpha(String str) {
if (str == null) {
return "#";
}
if (str.trim().length() == 0) {
return "#";
}
char c = str.trim().substring(0, 1).charAt(0);