Android之实现系统联系人软件的分组和字母表导航效果
联系人分章节显示、ListView快速滑动显示联系人首字母、附带字母表快速查找的例子， 查阅网络资源，实现方式都是比较复杂，尤其有些还实现了SectionIndex接口，很多人不怎么能理解，研究后发现此种类型的例子没必要也不应该那么实现，这里贴上代码供大家学习。
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; /** * 联系人分章节显示、ListView快速滑动显示联系人首字母、附带字母表快速查找的例子 * 查阅网络资源，实现方式都是比较复杂，尤其有些还实现了SectionIndex接口，很多人不怎么能理解，研究后发现此种类型的例子没必要也不应该那么实现 * @author [email protected] * */ 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"; @Override public 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()); } @Override protected void onResume() { super.onResume(); Uri uri = Uri.parse("content://com.android.contacts/data/phones"); // 联系人的Uri String[] projection = { "_id", "display_name", "data1", "sort_key" }; // 查询的列 asyncQuery.startQuery(0, null, uri, projection, null, null, "sort_key COLLATE LOCALIZED asc"); // 按照sort_key升序查询 } /** * 数据库异步查询类AsyncQueryHandler * * @author administrator * */ private class MyAsyncQueryHandler extends AsyncQueryHandler { public MyAsyncQueryHandler(ContentResolver cr) { super(cr); } /** * 查询结束的回调函数 */ @Override protected 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")) {// 去除多余的中国地区号码标志，对这个程序没有影响。 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; } /* * 移植时只需要提供一个已排序的集合list即可 */ private class ListAdapter extends BaseAdapter{ private LayoutInflater inflater; private List<ContentValues> list; private HashMap<String, Integer> alphaIndexer;//保存每个索引在list中的位置【#-0，A-4，B-10】 private String[] sections;//每个分组的索引表【A,B,C,F...】 public ListAdapter(Context context, List<ContentValues> list) { this.inflater = LayoutInflater.from(context); this.list = list; // 该list是已经排序过的集合，有些项目中的数据必须要自己进行排序。 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)){//只记录在list中首次出现的位置 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); } @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); String name = cv.getAsString(NAME); String number = cv.getAsString(NUMBER); holder.name.setText(name); holder.number.setText(number); // 当前联系人的sortKey String currentStr = getAlpha(list.get(position).getAsString( SORT_KEY)); // 上一个联系人的sortKey String previewStr = (position - 1) >= 0 ? getAlpha(list.get( position - 1).getAsString(SORT_KEY)) : " "; /** * 判断显示#、A-Z的TextView隐藏与可见 */ if (!previewStr.equals(currentStr)) { // 当前联系人的sortKey！=上一个联系人的sortKey，说明当前联系人是新组。 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); // 正则表达式，判断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(); // 大写输出 } 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 [email protected] * */ 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; } @Override public boolean onTouchEvent(MotionEvent event) { int act = event.getAction(); float y = event.getY(); // 计算手指位置，找到对应的段，让mList移动段开头的位置上 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有标题栏，本例中没有。 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() { @Override public 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() { @Override public void run() { if (mDialogText != null && mDialogText.getVisibility() == View.VISIBLE) { mDialogText.setVisibility(INVISIBLE); } } }); } } return super.onTouchEvent(event); } }
3.布局文件
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.QuickAlphabeticBar
android: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" />
<TextView
android: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" />
<!-- 联系人信息 -->
<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.效果图
源码地址：http://download.csdn.net/detail/zhf198909/4485281