Android之實現系統連絡人軟體的分組和字母表導航效果

             連絡人分章節顯示、ListView快速滑動顯示連絡人首字母、附帶字母錶快速尋找的例子， 查閱網路資源，實現方式都是比較複雜，尤其有些還實現了SectionIndex介面，很多人不怎麼能理解，研究後發現此種類型的例子沒必要也不應該那麼實現，這裡貼上代碼供大家學習。

1.FastContactSearchDemoActivity.java

package com.zhf.FastContactSearchWithAlphabeticBarDemo;import java.util.ArrayList;import java.util.Collections;import java.util.HashMap;import java.util.List;import java.util.Set;import java.util.regex.Pattern;import com.zhf.FastContactSearchDemo.R;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.net.Uri;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;/** * 連絡人分章節顯示、ListView快速滑動顯示連絡人首字母、附帶字母錶快速尋找的例子 * 查閱網路資源，實現方式都是比較複雜，尤其有些還實現了SectionIndex介面，很多人不怎麼能理解，研究後發現此種類型的例子沒必要也不應該那麼實現 * @author hiphonezhu@sina.com *  */public class FastContactSearchDemoActivity extends Activity {private BaseAdapter adapter;private ListView personList;private List<ContentValues> list;private AsyncQueryHandler asyncQuery;private QuickAlphabeticBar alpha;private static final String NAME = "name", NUMBER = "number",SORT_KEY = "sort_key";@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);personList = (ListView) findViewById(R.id.listView);alpha = (QuickAlphabeticBar) findViewById(R.id.fast_scroller);asyncQuery = new MyAsyncQueryHandler(getContentResolver());}@Overrideprotected void onResume() {super.onResume();Uri uri = Uri.parse("content://com.android.contacts/data/phones"); // 連絡人的UriString[] projection = { "_id", "display_name", "data1", "sort_key" }; // 查詢的列asyncQuery.startQuery(0, null, uri, projection, null, null,"sort_key COLLATE LOCALIZED asc"); // 按照sort_key升序查詢}/** * 資料庫非同步查詢類AsyncQueryHandler *  * @author administrator *  */private class MyAsyncQueryHandler extends AsyncQueryHandler {public MyAsyncQueryHandler(ContentResolver cr) {super(cr);}/** * 查詢結束的回呼函數 */@Overrideprotected void onQueryComplete(int token, Object cookie, Cursor cursor) {if (cursor != null && cursor.getCount() > 0) {list = new ArrayList<ContentValues>();cursor.moveToFirst();for (int i = 0; i < cursor.getCount(); i++) {ContentValues cv = new ContentValues();cursor.moveToPosition(i);String name = cursor.getString(1);String number = cursor.getString(2);String sortKey = cursor.getString(3);if (number.startsWith("+86")) {// 去除多餘的中國地區號碼標誌，對這個程式沒有影響。cv.put(NAME, name);cv.put(NUMBER, number.substring(3));cv.put(SORT_KEY, sortKey);} else {cv.put(NAME, name);cv.put(NUMBER, number);cv.put(SORT_KEY, sortKey);}list.add(cv);}if (list.size() > 0) {setAdapter(list);}}}}private void setAdapter(List<ContentValues> list) {adapter = new ListAdapter(this, list);personList.setAdapter(adapter);alpha.init(FastContactSearchDemoActivity.this);alpha.setListView(personList);alpha.setHight(alpha.getHeight());alpha.setVisibility(View.VISIBLE);}private static class ViewHolder {TextView alpha;TextView name;TextView number;}/* * 移植時只需要提供一個已排序的集合list即可 */private class ListAdapter extends BaseAdapter{private LayoutInflater inflater;private List<ContentValues> list;private HashMap<String, Integer> alphaIndexer;//儲存每個索引在list中的位置【#-0，A-4，B-10】private String[] sections;//每個分組的索引表【A,B,C,F...】public ListAdapter(Context context, List<ContentValues> list) {this.inflater = LayoutInflater.from(context);this.list = list; // 該list是已經排序過的集合，有些項目中的資料必須要自己進行排序。this.alphaIndexer = new HashMap<String, Integer>();this.sections = new String[list.size()];for (int i =0; i <list.size(); i++) {String name = getAlpha(list.get(i).getAsString(SORT_KEY));if(!alphaIndexer.containsKey(name)){//只記錄在list中首次出現的位置alphaIndexer.put(name, i);}}Set<String> sectionLetters = alphaIndexer.keySet();ArrayList<String> sectionList = new ArrayList<String>(sectionLetters);Collections.sort(sectionList);sections = new String[sectionList.size()];sectionList.toArray(sections);alpha.setAlphaIndexer(alphaIndexer);}@Overridepublic int getCount() {return list.size();}@Overridepublic Object getItem(int position) {return list.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic 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);String name = cv.getAsString(NAME);String number = cv.getAsString(NUMBER);holder.name.setText(name);holder.number.setText(number);// 當前連絡人的sortKeyString currentStr = getAlpha(list.get(position).getAsString(SORT_KEY));// 上一個連絡人的sortKeyString previewStr = (position - 1) >= 0 ? getAlpha(list.get(position - 1).getAsString(SORT_KEY)) : " ";/** * 判斷顯示#、A-Z的TextView隱藏與可見 */if (!previewStr.equals(currentStr)) { // 當前連絡人的sortKey！=上一個連絡人的sortKey，說明當前連絡人是新組。holder.alpha.setVisibility(View.VISIBLE);holder.alpha.setText(currentStr);} else {holder.alpha.setVisibility(View.GONE);}return convertView;}}/** * 提取英文的首字母，非英文字母用#代替。 *  * @param str * @return */private String getAlpha(String str) {if (str == null) {return "#";}if (str.trim().length() == 0) {return "#";}char c = str.trim().substring(0, 1).charAt(0);// Regex，判斷首字母是否是英文字母Pattern pattern = Pattern.compile("^[A-Za-z]+{1}quot;);if (pattern.matcher(c + "").matches()) {return (c + "").toUpperCase(); // 大寫輸出} else {return "#";}}}

2.QuickAlphabeticBar.java

package com.zhf.FastContactSearchWithAlphabeticBarDemo;import java.util.HashMap;import com.zhf.FastContactSearchDemo.R;import android.app.Activity;import android.content.Context;import android.os.Handler;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.widget.ImageButton;import android.widget.ListView;import android.widget.TextView;/** * 字母表 * @author hiphonezhu@sina.com * */public class QuickAlphabeticBar extends ImageButton {private TextView mDialogText;private Handler mHandler;private ListView mList;private float mHight;private String[] letters = new String[] { "#", "A", "B", "C", "D", "E","F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R","S", "T", "U", "V", "W", "X", "Y", "Z" };private HashMap<String, Integer> alphaIndexer;public QuickAlphabeticBar(Context context) {super(context);}public QuickAlphabeticBar(Context context, AttributeSet attrs) {super(context, attrs);}public QuickAlphabeticBar(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}public void init(Activity ctx) {mDialogText = (TextView) ctx.findViewById(R.id.fast_position);mDialogText.setVisibility(View.INVISIBLE);mHandler = new Handler();}public void setListView(ListView mList) {this.mList = mList;}public void setAlphaIndexer(HashMap<String, Integer> alphaIndexer) {this.alphaIndexer = alphaIndexer;}public void setHight(float mHight) {this.mHight = mHight;}@Overridepublic boolean onTouchEvent(MotionEvent event) {int act = event.getAction();float y = event.getY();// 計算手指位置，找到對應的段，讓mList移動段開頭的位置上int selectIndex = (int) (y / (mHight / 27));if (selectIndex < 27) {// 防止越界String key = letters[selectIndex];if (alphaIndexer.containsKey(key)) {int pos = alphaIndexer.get(key);if (mList.getHeaderViewsCount() > 0) {// 防止ListView有標題列，本例中沒有。this.mList.setSelectionFromTop(pos + mList.getHeaderViewsCount(), 0);} else {this.mList.setSelectionFromTop(pos, 0);}mDialogText.setText(letters[selectIndex]);}}if (act == MotionEvent.ACTION_DOWN) {if (mHandler != null) {mHandler.post(new Runnable() {@Overridepublic void run() {if (mDialogText != null&& mDialogText.getVisibility() == View.INVISIBLE) {mDialogText.setVisibility(VISIBLE);}}});}} else if (act == MotionEvent.ACTION_UP) {if (mHandler != null) {mHandler.post(new Runnable() {@Overridepublic void run() {if (mDialogText != null&& mDialogText.getVisibility() == View.VISIBLE) {mDialogText.setVisibility(INVISIBLE);}}});}}return super.onTouchEvent(event);}}

3.布局檔案

  3.1.main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout android:layout_width="fill_parent"  xmlns:android="http://schemas.android.com/apk/res/android"android:layout_height="fill_parent" android:layout_weight="1.0">    <ListView android:id="@+id/listView"      android:layout_width="fill_parent"        android:layout_height="fill_parent"      android:scrollbars="none"android:layout_weight="1.0"android:scrollingCache="true"></ListView><com.zhf.FastContactSearchWithAlphabeticBarDemo.QuickAlphabeticBarandroid:layout_alignRight="@id/listView"android:layout_gravity="top|right|center"android:layout_marginTop="10dip"android:id="@+id/fast_scroller" android:background="@null"android:layout_width="wrap_content" android:layout_height="wrap_content"android:scaleType="centerInside"android:src="@drawable/dic_background" /><TextViewandroid:layout_centerInParent="true" android:id="@+id/fast_position" android:textSize="48dip" android:visibility="invisible"android:textColor="#404040" android:background="@drawable/sort_icon_bg_click"android:layout_gravity="center_horizontal|top" android:padding="2dip"android:layout_margin="34dip" android:layout_width="70dip"android:layout_height="70dip" android:gravity="center" /></RelativeLayout>

  3.2.list_item.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >        <!-- 首字母 -->    <TextView        android:id="@+id/alpha"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:background="#333333"        android:paddingLeft="10dip"        android:textColor="#FFFFFF"        android:visibility="gone" />        <!-- 連絡人資訊 -->    <ImageView        android:id="@+id/imageView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_below="@id/alpha"        android:src="@drawable/ic_launcher" />    <TextView        android:id="@+id/name"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignTop="@id/imageView"        android:layout_marginLeft="2.0dip"        android:layout_marginRight="5.0dip"        android:layout_marginTop="6.0dip"        android:layout_toRightOf="@id/imageView"        android:singleLine="true"        android:textAppearance="?android:textAppearanceMedium" />    <TextView        android:id="@+id/number"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@id/name"        android:layout_alignWithParentIfMissing="true"        android:layout_below="@id/name"        android:ellipsize="marquee"        android:singleLine="true"        android:textAppearance="?android:textAppearanceSmall" /></RelativeLayout>

4.

源碼地址：http://download.csdn.net/detail/zhf198909/4485281