Listview 내에서 arraylist 의 초성 검색 예제입니다.

참고 url

http://www.androidpub.com/45681


   


HangulUtils.cass 파일을 생성합니다.

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/**
 * com.ziofront.utils
 * HangulUtils.java
 * Jiho Park 2009. 11. 27.
 *
 * Copyright (c) 2009 ziofront.com. All Rights Reserved.
 */
public class HangulUtils {
 
    private static String toHexString(int decimal) {
        Long intDec = Long.valueOf(decimal);
        return Long.toHexString(intDec);
    }
 
    public static final int HANGUL_BEGIN_UNICODE = 44032; // 가
    public static final int HANGUL_END_UNICODE = 55203; // 힣
    public static final int HANGUL_BASE_UNIT = 588;
 
    public static final int[] INITIAL_SOUND_UNICODE = { 12593, 12594, 12596,
            12599, 12600, 12601, 12609, 12610, 12611, 12613, 12614, 12615,
            12616, 12617, 12618, 12619, 12620, 12621, 12622 };
 
    public static final char[] INITIAL_SOUND = { 'ㄱ', 'ㄲ', 'ㄴ', 'ㄷ', 'ㄸ', 'ㄹ',
            'ㅁ', 'ㅂ', 'ㅃ', 'ㅅ', 'ㅆ', 'ㅇ', 'ㅈ', 'ㅉ', 'ㅊ', 'ㅋ', 'ㅌ', 'ㅍ', 'ㅎ' };
 
    /**
     * 문자를 유니코드(10진수)로 변환 후 반환 한다.
     *
     * @param ch
     * @return
     */
    public static int convertCharToUnicode(char ch) {
        return (int) ch;
    }
 
    /**
     * 문자열을 유니코드(10진수)로 변환 후 반환 한다.
     *
     * @param str
     * @return
     */
    public static int[] convertStringToUnicode(String str) {
        int[] unicodeList = null;
        if (str != null) {
            unicodeList = new int[str.length()];
            for (int i = 0; i < str.length(); i++) {
                unicodeList[i] = convertCharToUnicode(str.charAt(i));
            }
        }
 
        return unicodeList;
    }
 
    /**
     * 유니코드(16진수)를 문자로 변환 후 반환 한다.
     *
     * @param hexUnicode
     * @return
     */
    public static char convertUnicodeToChar(String hexUnicode) {
        return (char) Integer.parseInt(hexUnicode, 16);
    }
 
    /**
     * 유니코드(10진수)를 문자로 변환 후 반환 한다.
     *
     * @param unicode
     * @return
     */
    public static char convertUnicodeToChar(int unicode) {
        return convertUnicodeToChar(toHexString(unicode));
    }
 
    /**
     *
     * @param value
     * @return
     */
    public static String getHangulInitialSound(String value) {
        StringBuffer result = new StringBuffer();
        int[] unicodeList = convertStringToUnicode(value);
        for (int unicode : unicodeList) {
 
            if (HANGUL_BEGIN_UNICODE <= unicode
                    && unicode <= HANGUL_END_UNICODE) {
                int tmp = (unicode - HANGUL_BEGIN_UNICODE);
                int index = tmp / HANGUL_BASE_UNIT;
                result.append(INITIAL_SOUND[index]);
            } else {
                result.append(convertUnicodeToChar(unicode));
 
            }
        }
        return result.toString();
    }
 
    public static boolean[] getIsChoSungList(String name) {
        if (name == null) {
            return null;
        }
        boolean[] choList = new boolean[name.length()];
        for (int i = 0; i < name.length(); i++) {
            char c = name.charAt(i);
 
            boolean isCho = false;
            for (char cho : INITIAL_SOUND) {
                if (c == cho) {
                    isCho = true;
                    break;
                }
            }
            choList[i] = isCho;
        }
        return choList;
    }
 
    public static String getHangulInitialSound(String value,
            String searchKeyword) {
        return getHangulInitialSound(value, getIsChoSungList(searchKeyword));
    }
 
    public static String getHangulInitialSound(String value, boolean[] isChoList) {
        StringBuffer result = new StringBuffer();
        int[] unicodeList = convertStringToUnicode(value);
        for (int idx = 0; idx < unicodeList.length; idx++) {
            int unicode = unicodeList[idx];
 
            if (isChoList != null && idx <= (isChoList.length - 1)) {
                if (isChoList[idx]) {
                    if (HANGUL_BEGIN_UNICODE <= unicode
                            && unicode <= HANGUL_END_UNICODE) {
                        int tmp = (unicode - HANGUL_BEGIN_UNICODE);
                        int index = tmp / HANGUL_BASE_UNIT;
                        result.append(INITIAL_SOUND[index]);
                    } else {
                        result.append(convertUnicodeToChar(unicode));
                    }
                } else {
                    result.append(convertUnicodeToChar(unicode));
                }
            } else {
                result.append(convertUnicodeToChar(unicode));
            }
        }
 
        return result.toString();
    }
 
    public static void main(String[] args) {
        for (char ch : HangulUtils.INITIAL_SOUND) {
            System.out.print(HangulUtils.convertCharToUnicode(ch) + ",");
        }
    }
}


ListView뷰를 구성합니다.

xml코드

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<?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"
    android:background="@color/colorBg">
 
    <android.support.v7.widget.RecyclerView
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:background="@color/colorBg"
        android:id="@+id/rv">
    </android.support.v7.widget.RecyclerView>
 
    <!-- no data -->
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:id="@+id/tv_noSearch"
        android:textColor="#000000"
        android:text="검색된 메모가 없습니다"
        android:visibility="invisible"
        android:textSize="16sp"/>
</RelativeLayout>


EditText 내에서의 TextWathcher 작업을 합니다.

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<p>search_view = (EditText) findViewById(R.id.search_view);
search_view.addTextChangedListener(new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
    }
    @Override
    public void onTextChanged(CharSequence c, int i, int i1, int i2) {
        setChangeListData(c.toString());
    }
    @Override
    public void afterTextChanged(Editable editable) {
    }
});</p>


setChangeListData 메소드를 작성합니다.

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public void setChangeListData(String searchKeyword) {
    if(searchKeyword != null) {
        if (searchKeyword.length() == 0) {
            setLoadListData(oriList);
        } else {
            List<ItemMemo> temp = new ArrayList<>();
            for(ItemMemo i : mList) {
                boolean isAdd = false;
                String iniName = HangulUtils.getHangulInitialSound(i.contents, searchKeyword);
                if (iniName.indexOf(searchKeyword) >= 0) {
                    isAdd = true;
                }
                if(isAdd) {
                    temp.add(i);
                }
            }
            setSearchData(temp);
        }
    } else {
        setLoadListData(oriList);
    }
}
 
private void setSearchData(List<ItemMemo> list) {
    lay_noData.setVisibility(View.GONE);
    tv_noSearch.setVisibility(View.GONE);
    if(list.size() == 0) {
        rv.setVisibility(View.INVISIBLE);
        tv_noSearch.setVisibility(View.VISIBLE);
    } else {
        rv.setVisibility(View.VISIBLE);
        mAdapter.swap(list);
    }
}


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