android根据电话号码查询联系人名称，导出通讯录所有联系人的方法

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/**
     * 根据电话号码取得联系人姓名
     */
    public static String getContactNameByPhoneNumber(Context context, String address) {
        String[] projection = { ContactsContract.PhoneLookup.DISPLAY_NAME,
                ContactsContract.CommonDataKinds.Phone.NUMBER };

        // 将自己添加到 msPeers 中
        Cursor cursor = context.getContentResolver().query(
                ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                projection, // Which columns to return.
                ContactsContract.CommonDataKinds.Phone.NUMBER + " = '"
                        + address + "'", // WHERE clause.
                null, // WHERE clause value substitution
                null); // Sort order.

        if (cursor == null) {
            Log.d(TAG, "getPeople null");
            return null;
        }
        for (int i = 0; i < cursor.getCount(); i++) {
            cursor.moveToPosition(i);

            // 取得联系人名字
            int nameFieldColumnIndex = cursor
                    .getColumnIndex(ContactsContract.PhoneLookup.DISPLAY_NAME);
            String name = cursor.getString(nameFieldColumnIndex);
            return name;
        }
        return null;
    }

/**
     * 获取所有联系人内容
     * @param context
     * @param address
     * @return
     */
    public static String getContacts(Context context) {
        StringBuilder sb = new StringBuilder();
        
        ContentResolver cr = context.getContentResolver();
        Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI, null,
                null, null, null);

        if (cursor.moveToFirst()) {
            do {
                String contactId = cursor.getString(cursor
                        .getColumnIndex(ContactsContract.Contacts._ID));
                String name = cursor
                        .getString(cursor
                                .getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
                //第一条不用换行
                if(sb.length() == 0){
                    sb.append(name);
                }else{
                    sb.append("\n" + name);
                }
                
                Cursor phones = cr.query(
                        ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                        null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID
                                + " = " + contactId, null, null);
                while (phones.moveToNext()) {
                    String phoneNumber = phones
                            .getString(phones
                                    .getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                    // 添加Phone的信息
                    sb.append("\t").append(phoneNumber);
                    
                }
                phones.close();
                
            } while (cursor.moveToNext());
        }
        cursor.close();

        return sb.toString();

转载自：http://www.cnblogs.com/zdz8207/archive/2012/11/09/2762893.html

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