【笔记】通讯录使用侧栏字母索引

侧边字母索引在通讯录、地区选择之类的长listview中比较实用。

自定义View

public class SectionIndexBar extends View {    //索引    private String[] indexs = {"#", "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 int selectIndex = -1;    private Paint paintNormal;    private Paint paintSelect;    //普通色    private int colorNormal = Color.WHITE;    //选中色    private int colorSelect = Color.BLACK;    //字体大小    private float textSize = 40f;    private int mWidth;    private int itemHeight;    //背景色    private int colorBackground = Color.GRAY;    private OnIndexListener onIndexListener;    public void setOnIndexListener(OnIndexListener onIndexListener) {        this.onIndexListener = onIndexListener;    }    public interface OnIndexListener {        void onIndexSelect(String str);        void onIndexChange(String str);    }    public SectionIndexBar(Context context) {        this(context, null);    }    public SectionIndexBar(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    private void init() {        setClickable(true);        paintNormal = new Paint();        paintNormal.setColor(colorNormal);        paintNormal.setAntiAlias(true);        paintNormal.setTextSize(textSize);        paintSelect = new Paint();        paintSelect.setColor(colorSelect);        paintNormal.setAntiAlias(true);        paintSelect.setTextSize(textSize);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        //设置背景        setBackgroundColor(colorBackground);        mWidth = getWidth();        itemHeight = getHeight() / indexs.length;        drawChars(canvas);        invalidate();    }    /**     * 绘制字母     *     * @param canvas     */    private void drawChars(Canvas canvas) {        for (int i = 0; i < indexs.length; i++) {            if (selectIndex == i) {                //绘制选中字母                canvas.drawText(indexs[i], (mWidth - paintNormal.measureText(indexs[i])) / 2, (i + 1) * itemHeight, paintSelect);            } else {                //绘制普通字母                canvas.drawText(indexs[i], (mWidth - paintSelect.measureText(indexs[i])) / 2, (i + 1) * itemHeight, paintNormal);            }        }    }    /**     * 手势控制     * @param event     * @return     */    @Override    public boolean onTouchEvent(MotionEvent event) {        int count = (int) event.getY() / itemHeight;        count = count < 0 ? 0 : (count >= indexs.length ? indexs.length - 1 : count);        selectIndex = count;        if (onIndexListener != null) {            onIndexListener.onIndexChange(indexs[selectIndex]);        }        if (event.getAction() == MotionEvent.ACTION_UP) {            if (onIndexListener != null) {                onIndexListener.onIndexSelect(indexs[selectIndex]);            }        }        return super.onTouchEvent(event);    }}

获取联系人

public class ContactUtil {    private static final String[] PHONES_PROJECTION = {            ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,            ContactsContract.CommonDataKinds.Phone.NUMBER    };    /**     * 联系人显示名称     **/    private static final int PHONES_DISPLAY_NAME_INDEX = 0;    /**     * 电话号码     **/    private static final int PHONES_NUMBER_INDEX = 1;    /**     * 得到所有的手机号码联系人信息     **/    public static List<PhoneContact> getAllPhoneContacts(Context context) {        List<PhoneContact> phoneContactList = getPhoneContact(context);        List<PhoneContact> simContactList = getSIMContacts(context);        for (PhoneContact contact : simContactList) {            if (!isContainObject(phoneContactList, contact)) {                phoneContactList.add(contact);            }        }        return phoneContactList;    }    /*     * 某个联系人是否已经存在于联系人列表中    */    public static boolean isContainObject(List<PhoneContact> phoneContactList, PhoneContact contact) {        for (int i = 0; i < phoneContactList.size(); i++) {            PhoneContact curContact = phoneContactList.get(i);            if (curContact.getMobile().equals(contact.getMobile()) && curContact.getName().equals(contact.getName())) {                return true;            }        }        return false;    }    /**     * 获取手机通讯录联系人     *     * @param context     * @return     */    public static List<PhoneContact> getPhoneContact(Context context) {        List<PhoneContact> list = new ArrayList<PhoneContact>();        try {            ContentResolver contentResolver = context.getContentResolver();            Uri contentUri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;            Cursor cursor = contentResolver.query(contentUri, PHONES_PROJECTION, null, null, null);            while (cursor != null ? cursor.moveToNext() : false) {                String name = cursor.getString(0);                String mobile = cursor.getString(1).replace("+86", "").replace(" ", "").replace("-", "");                String namePinYin = PinYinUtil.getPinYin(name).toUpperCase(Locale.US);                PhoneContact contactInfo = new PhoneContact(name, mobile, namePinYin);                list.add(contactInfo);            }            cursor.close();        } catch (Exception e) {        }        return list;    }    /**     * 得到手机SIM卡联系人人信息     **/    private static List<PhoneContact> getSIMContacts(Context context) {        List<PhoneContact> list = new ArrayList<PhoneContact>();        try {            ContentResolver contentResolver = context.getContentResolver();            Uri uri = Uri.parse("content://icc/adn");            Cursor cursor = contentResolver.query(uri, PHONES_PROJECTION, null, null, null);            while (cursor != null ? cursor.moveToNext() : false) {                String name = cursor.getString(PHONES_DISPLAY_NAME_INDEX);                String mobile = cursor.getString(PHONES_NUMBER_INDEX).replace("+86", "").replace(" ", "").replace("-", "");                String namePinYin = PinYinUtil.getPinYin(name).toUpperCase(Locale.US);                PhoneContact contactInfo = new PhoneContact(name, mobile, namePinYin);                list.add(contactInfo);            }            cursor.close();        } catch (Exception ex) {        }        return list;    }}

源码