最近需要实现一个手机通讯录的快速索引功能。根据姓名首字母快速索引功能。下面是一个手机联系人快速索引的效果，总体来说代码不算难，拼音转换的地方略有复杂。下面上源码：源码中有注释。
下面是效果图：
MainActivity：
import java.util.ArrayList; import java.util.Collections; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ListView; import android.widget.TextView; /** * 这里是主布局 * @author lxd * */ public class MainActivity extends Activity { private ListView lv_main; private FriendAdapter adapter; private List<Friend> data = new ArrayList<Friend>(); private QuickIndexView qiv_main; private TextView tv_main_word; private Handler handler = new Handler(){ public void handleMessage(android.os.Message msg) { //隐藏word tv_main_word.setVisibility(View.GONE); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); lv_main = (ListView) findViewById(R.id.lv_main); qiv_main = (QuickIndexView) findViewById(R.id.qiv_main); tv_main_word = (TextView) findViewById(R.id.tv_main_word); //设置监听 qiv_main.setOnIndexChangedListener(new QuickIndexView.OnIndexChangedListener() { @Override public void onIndexChanged(String word) { tv_main_word.setText(word); tv_main_word.setVisibility(View.VISIBLE); //handler.removeMessages(1); //移除未处理的消息 handler.removeCallbacksAndMessages(null); //发延迟消息 handler.sendEmptyMessageDelayed(1, 2000); //滑动listview //查找对应的item for(int i=0;i<data.size();i++) { String fWord = data.get(i).getPinyin().substring(0, 1); if(word.equals(fWord)) { lv_main.setSelection(i); return; } } } @Override public void onUp() { //tv_main_word.setVisibility(View.GONE); } }); //显示列表 adapter = new FriendAdapter(); initData(); lv_main.setAdapter(adapter); //lv_main.setSelection(5); } private void initData() { data.add(new Friend("张三")); data.add(new Friend("杨九")); data.add(new Friend("胡继群")); data.add(new Friend("刘畅")); data.add(new Friend("钟泽兴")); data.add(new Friend("尹革新")); data.add(new Friend("安传鑫")); data.add(new Friend("张骞壬")); data.add(new Friend("温松")); data.add(new Friend("李凤秋")); data.add(new Friend("刘甫")); data.add(new Friend("娄全超")); data.add(new Friend("张猛")); data.add(new Friend("王英杰")); data.add(new Friend("李振南")); data.add(new Friend("孙仁政")); data.add(new Friend("唐春雷")); data.add(new Friend("牛鹏伟")); data.add(new Friend("姜宇航")); data.add(new Friend("刘挺")); data.add(new Friend("张洪瑞")); data.add(new Friend("张建忠")); data.add(new Friend("侯亚帅")); data.add(new Friend("刘帅")); data.add(new Friend("乔竞飞")); data.add(new Friend("徐雨健")); data.add(new Friend("吴亮")); data.add(new Friend("王兆霖")); data.add(new Friend("阿三")); Collections.sort(data); } class FriendAdapter extends BaseAdapter { @Override public int getCount() { return data.size(); } @Override public Object getItem(int position) { return data.get(position); } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; if(convertView==null) { holder = new ViewHolder(); convertView = View.inflate(MainActivity.this, R.layout.item_main, null); holder.wordTV = (TextView) convertView.findViewById(R.id.tv_item_word); holder.nameTV = (TextView) convertView.findViewById(R.id.tv_item_name); convertView.setTag(holder);//***********? } else { holder = (ViewHolder) convertView.getTag(); } Friend friend = data.get(position); String word = friend.getPinyin().substring(0, 1); holder.wordTV.setText(word); holder.nameTV.setText(friend.getName()); //下标为0的显示 if(position==0) { holder.wordTV.setVisibility(View.VISIBLE); } else { //取出上一个friend, 并得到的第一个word String preWord = data.get(position-1).getPinyin().substring(0, 1); //判断是否于当前行的word是否相同 //如果相同, 隐藏 if(word.equals(preWord)) { holder.wordTV.setVisibility(View.GONE); } else { //如果不同, 显示 holder.wordTV.setVisibility(View.VISIBLE); } } return convertView; } class ViewHolder { public TextView wordTV; public TextView nameTV; } } }
主布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="${relativePackage}.${activityClass}" > <ListView android:id="@+id/lv_main" android:layout_width="match_parent" android:layout_height="match_parent" > </ListView> <> <com.atguigu.quickindex.QuickIndexView android:id="@+id/qiv_main" android:layout_width="40dp" android:layout_height="match_parent" android:layout_alignParentRight="true" android:background="#ffffff" > </com.atguigu.quickindex.QuickIndexView> <TextView android:id="@+id/tv_main_word" android:layout_width="100dp" android:layout_height="100dp" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:background="#66666666" android:text="A" android:textSize="40sp" android:gravity="center" android:visibility="gone"/> </RelativeLayout>
Item：
<"1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:id="@+id/tv_item_word" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="A" android:background="#66666666" android:textSize="18sp" android:padding="5dp"/> <TextView android:id="@+id/tv_item_name" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="某人" android:textSize="18sp" android:padding="5dp"/> </LinearLayout>
自定义View：
import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; /** * 这里是自定义View * @author lxd * */ public class QuickIndexView extends View { private float itemWidth; private float itemHeight; // private float wordWidth; // private float wordHeight; private String[] indexArr = { "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 Paint paint; public QuickIndexView(Context context, AttributeSet attrs) { super(context, attrs); paint = new Paint(); paint.setColor(Color.WHITE); paint.setTextSize(16); paint.setAntiAlias(true); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); itemWidth = this.getMeasuredWidth(); itemHeight = this.getMeasuredHeight() / 26f; } @Override protected void onDraw(Canvas canvas) { //当每次触发重绘的时候，就把26个字母循环一遍 for (int i = 0; i < indexArr.length; i++) { String word = indexArr[i]; // 设置文字的颜色 if (i == touchIndex) { //这里设置被点击的字母变化：颜色变灰色、字体变25sp paint.setColor(Color.GRAY); paint.setTextSize(25); } else { //其他没被点击的字母，保持原有状态：设置颜色、字体大小为18sp paint.setColor(Color.BLACK); paint.setTextSize(18); } // 得到word的宽高 Rect bounds = new Rect(); paint.getTextBounds(word, 0, word.length(), bounds); //得到字体的宽 int wordWidth = bounds.width(); //得到字体的高 int wordHeight = bounds.height(); // 计算word的左上角的坐标：字母所在的X坐标、Y坐标 float x = itemWidth / 2 - wordWidth / 2; float y = itemHeight / 2 + wordHeight / 2 + i * itemHeight; // 绘制word canvas.drawText(word, x, y, paint); } } // /////////////////////////////////////////////////////////////////////// private int touchIndex = -1;// 触摸的字母的下标 @Override public boolean onTouchEvent(MotionEvent event) { // 得到事件坐标 float eventY = event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: case MotionEvent.ACTION_MOVE: // 计算下标 int index = (int) (eventY / itemHeight); if (index > 25) { index = 25; } if (index < 0) { index = 0; } // 如果下标有改变, 强制重绘 if (index != touchIndex) { // 更新touchIndex touchIndex = index; // 强制重绘 invalidate(); // 通知Activity更新TextView if (onIndexChangedListener != null) { onIndexChangedListener.onIndexChanged(indexArr[index]); } } break; case MotionEvent.ACTION_UP: touchIndex = -1; // 强制重绘 invalidate(); // 通知Activity更新TextView if (onIndexChangedListener != null) { onIndexChangedListener.onUp(); } break; default: break; } return true;// 所有的事件都由当前视图消费 } private OnIndexChangedListener onIndexChangedListener; /* * 设置监听对象的方法 这个方法一般是Activity调用 */ public void setOnIndexChangedListener( OnIndexChangedListener onIndexChangedListener) { this.onIndexChangedListener = onIndexChangedListener; } interface OnIndexChangedListener { // 当操作的下标改变时自动调用 public void onIndexChanged(String word); // 当up时调用 public void onUp(); } }
联系人类：
/** * 联系人类 * @author lxd * */ public class Friend implements Comparable<Friend> { private String name; private String pinyin; public Friend(String name) { super(); this.name = name; pinyin = PinYinUtils.getPinYin(name); } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPinyin() { return pinyin; } public void setPinyin(String pinyin) { this.pinyin = pinyin; } @Override public String toString() { return "Friend [name=" + name + ", pinyin=" + pinyin + "]"; } @Override public int compareTo(Friend another) { return this.pinyin.compareTo(another.getPinyin()); } }
工具类：用于将汉字转换为拼音
/** * 将汉字转换为拼音 * @author lxd * */ public class PinYinUtils { /** * 得到指定汉字的拼音 * 注意:不应该被频繁调用，它消耗一定内存 * @param hanzi * @return */ public static String getPinYin(String hanzi){ String pinyin = ""; HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();//控制转换是否大小写，是否带音标 format.setCaseType(HanyuPinyinCaseType.UPPERCASE);//大写 format.setToneType(HanyuPinyinToneType.WITHOUT_TONE); //由于不能直接对多个汉字转换，只能对单个汉字转换 char[] arr = hanzi.toCharArray(); for (int i = 0; i < arr.length; i++) { if(Character.isWhitespace(arr[i]))continue;//如果是空格，则不处理，进行下次遍历 //汉字是2个字节存储，肯定大于127，所以大于127就可以当为汉字转换 if(arr[i]>127){ try { //由于多音字的存在，单 dan shan String[] pinyinArr = PinyinHelper.toHanyuPinyinStringArray(arr[i], format); if(pinyinArr!=null){ pinyin += pinyinArr[0]; }else { pinyin += arr[i]; } } catch (BadHanyuPinyinOutputFormatCombination e) { e.printStackTrace(); //不是正确的汉字 pinyin += arr[i]; } }else { //不是汉字， pinyin += arr[i]; } } return pinyin; } }
以上代码是关于Android手机联系人快速索引(手机通讯录)的全部叙述，希望大家喜欢。
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