Contacts_Activity.java

package com.cui.trypro.small_function;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import android.os.Bundle;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.widget.SearchView;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.cui.trypro.BaseActivity;
import com.cui.trypro.R;


public class Contacts_Activity extends BaseActivity implements SearchView.OnQueryTextListener {
    private ListView sortListView;
    private SideBar sideBar;
    private TextView dialog;
    private SortAdapter adapter;
    private SearchView searchView;


    /**
     * 上次第一个可见元素，用于滚动时记录标识。
     */
    private int lastFirstVisibleItem = -1;

    /**
     * 分组的布局
     */
    private LinearLayout titleLayout;

    private TextView title;

    /**
     * 汉字转换成拼音的类
     */
    private CharacterParser characterParser;
    private List<SortModel> SourceDateList;
    /**
     * 根据拼音来排列ListView里面的数据类
     */
    private PinyinComparator pinyinComparator;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.contact_act);
        super.initToolbar("", true);
        initViews();
    }

    private void initViews() {
        //实例化汉字转拼音类
        characterParser = CharacterParser.getInstance();

        pinyinComparator = new PinyinComparator();

        sideBar = (SideBar) findViewById(R.id.sidrbar);
        dialog = (TextView) findViewById(R.id.dialog);
        title = (TextView) findViewById(R.id.title);
        titleLayout = (LinearLayout) findViewById(R.id.title_layout);
        sortListView = (ListView) findViewById(R.id.country_lvcountry);
        sideBar.setTextView(dialog);
        SourceDateList = filledData(getResources().getStringArray(R.array.date));
        sideBar.setOnTouchingLetterChangedListener(new SideBar.OnTouchingLetterChangedListener() {

            @Override
            public void onTouchingLetterChanged(String s) {
                //该字母首次出现的位置
                int position = adapter.getPositionForSection(s.charAt(0));
                if (position != -1) {
                    sortListView.setSelection(position);
                }
            }
        });


        sortListView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                Toast.makeText(getApplication(), ((SortModel) adapter.getItem(position)).getName(), Toast.LENGTH_SHORT).show();
            }
        });
        // 根据a-z进行排序源数据
        Collections.sort(SourceDateList, pinyinComparator);
        adapter = new SortAdapter(this, SourceDateList);
        sortListView.setAdapter(adapter);

        sortListView.setOnScrollListener(new AbsListView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {
            }

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
                                 int totalItemCount) {
                //因为这里是自定义数据源当某个字母的分组没有内容时就获取不到对应的nexSecPosition所以在不连续的字母没有挤压效果而系统通讯录通过AlphabetIndexer会都有分组可以实现
//                int section = adapter.getSectionForPosition(firstVisibleItem);
//                int nextSecPosition = adapter.getPositionForSection(section + 1);
                if (firstVisibleItem != lastFirstVisibleItem) {
                    ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) titleLayout.getLayoutParams();
                    params.topMargin = 0;
                    titleLayout.setLayoutParams(params);
                    title.setText(SourceDateList.get(firstVisibleItem).getSortLetters());
                }
                lastFirstVisibleItem = firstVisibleItem;
            }
        });
    }

    /**
     * 为ListView填充数据
     *
     * @param date
     * @return
     */
    private List<SortModel> filledData(String[] date) {
        List<SortModel> mSortList = new ArrayList<SortModel>();

        for (int i = 0; i < date.length; i++) {
            SortModel sortModel = new SortModel();
            sortModel.setName(date[i]);
            //汉字转换成拼音
            String pinyin = characterParser.getSelling(date[i]);
            String sortString = pinyin.substring(0, 1).toUpperCase();
            // 正则表达式，判断首字母是否是英文字母
            if (sortString.matches("[A-Z]")) {
                sortModel.setSortLetters(sortString.toUpperCase());
            } else {
                sortModel.setSortLetters("#");
            }
            mSortList.add(sortModel);
        }
        return mSortList;

    }

    /**
     * 根据输入框中的值来过滤数据并更新ListView
     *
     * @param filterStr
     */
    private void filterData(String filterStr) {
        List<SortModel> filterDateList = new ArrayList<SortModel>();

        if (TextUtils.isEmpty(filterStr)) {
            filterDateList = SourceDateList;
        } else {
            filterDateList.clear();
            for (SortModel sortModel : SourceDateList) {
                String name = sortModel.getName();
                if (name.contains(filterStr) || characterParser.getSelling(name).startsWith(filterStr)) {
                    filterDateList.add(sortModel);
                }
            }
        }
        // 根据a-z进行排序
        Collections.sort(filterDateList, pinyinComparator);
        adapter.updateListView(filterDateList);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        MenuItem menuItem = menu.findItem(R.id.action_search);//在菜单中找到对应控件的item
        searchView = (SearchView) MenuItemCompat.getActionView(menuItem);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        switch (id) {
            case android.R.id.home:
                onBackPressed();
                break;
            case R.id.action_search:
                searchView.setOnQueryTextListener(this);
                break;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public boolean onQueryTextSubmit(String query) {
        //当输入框里面的值为空，更新为原来的列表，否则为过滤数据列表
        filterData(query);
        return false;
    }

    @Override
    public boolean onQueryTextChange(String newText) {
        return false;
    }
}