列表按照字母排序检索SideBar

项目中要求列表按照ABCD这种字母排序检索的功能，看了大神写的，瞬间崇拜了，接下来借大家参考参考了

首先是自定义view sidebar

/**
 * @author J
 *一个自定义view 实现a-z的竖直绘制，和监听滑动事件
 */
public class SideBar extends View {
    private OnTouchingLetterChangedListener onTouchingLetterChangedListener;
    public static String[] b = { "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 choose = -1;
    private Paint paint = new Paint();

    private TextView mTextDialog;

    public void setTextView(TextView mTextDialog) {
        this.mTextDialog = mTextDialog;
    }

    public SideBar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public SideBar(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SideBar(Context context) {
        super(context);
    }

    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        int height = getHeight();
        int width = getWidth();
        int singleHeight = height / b.length;

        for (int i = 0; i < b.length; i++) {
            paint.setColor(Color.parseColor("#333333"));
//            paint.setColor(Color.WHITE);
            paint.setAntiAlias(true);
            paint.setTextSize(14);
            if (i == choose) {
                paint.setColor(Color.parseColor("#B8B8B8"));
                paint.setFakeBoldText(true);
            }
            float xPos = width / 2 - paint.measureText(b[i]) / 2;
            float yPos = singleHeight * i + singleHeight;
            canvas.drawText(b[i], xPos, yPos, paint);
            paint.reset();
        }

    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {
        final int action = event.getAction();
        final float y = event.getY();
        final int oldChoose = choose;
        final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener;
        final int c = (int) (y / getHeight() * b.length);

        switch (action) {
        case MotionEvent.ACTION_UP:
            setBackgroundDrawable(new ColorDrawable(0x00000000));
            choose = -1;//
            invalidate();
            if (mTextDialog != null) {
                mTextDialog.setVisibility(View.INVISIBLE);
            }
            break;

        default:
            // setBackgroundResource(R.drawable.sidebar_background);
            if (oldChoose != c) {
                if (c >= 0 && c < b.length) {
                    if (listener != null) {
                        listener.onTouchingLetterChanged(b[c]);
                    }
                    if (mTextDialog != null) {
                        mTextDialog.setText(b[c]);
                        mTextDialog.setVisibility(View.VISIBLE);
                    }

                    choose = c;
                    invalidate();
                }
            }

            break;
        }
        return true;
    }

    public void setOnTouchingLetterChangedListener(
            OnTouchingLetterChangedListener onTouchingLetterChangedListener) {
        this.onTouchingLetterChangedListener = onTouchingLetterChangedListener;
    }

    public interface OnTouchingLetterChangedListener {
        void onTouchingLetterChanged(String s);
    }

}

接下来是整个布局的部署了activity_sortlist

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_main"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <ListView
        android:id="@+id/country_lvcountry"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="center"
        android:divider="#eeeeee"
        android:dividerHeight="1px" />

    <LinearLayout
        android:id="@+id/top_layout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="#f2f2f2">

        <TextView
            android:id="@+id/top_char"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingBottom="3dip"
            android:paddingLeft="10dip"
            android:paddingTop="3dip"
            android:text=""
            android:textColor="#333333"
            android:textSize="14sp" />
    </LinearLayout>

    <TextView
        android:id="@+id/dialog"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_gravity="center"
        android:background="#999999"
        android:gravity="center"
        android:textColor="#ffffffff"
        android:textSize="30dp"
        android:visibility="invisible" />

    <com.app.activitys.view.SideBar
        android:id="@+id/sidrbar"
        android:layout_width="25.0dip"
        android:layout_height="fill_parent"
        android:layout_gravity="right|center"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="10dp" />


</FrameLayout>

接下来时使用了Sortlist

@ContentView(R.layout.activity_sortlist)
public class Sortlist extends BaseAppActivity {
private String[] strzimu = {"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 CharacterParser characterParser;
    private PinyinComparator pinyinComparator;
    private List<MyBrandListSortModel> SourceDateList; // 数据
    private BrandSortAdapter adapter; // 排序的适配器
    String   staus="";
    private int lastFirstVisibleItem = -1;
    @ViewInject(R.id.country_lvcountry)
    private ListView sortListView;
    @ViewInject(R.id.sidrbar)
    private SideBar sideBar;
    @ViewInject(R.id.dialog)
    private TextView dialog;
    @ViewInject(R.id.top_layout)
    private LinearLayout xuanfuLayout;
    @ViewInject(R.id.top_char)
    private TextView xuanfaText;
    @Override
    protected void init() {
        characterParser = CharacterParser.getInstance();
        pinyinComparator = new PinyinComparator();
        sideBar.setTextView(dialog);
        SourceDateList = new ArrayList<>();
        SourceDateList = filledData(SourceDateList);
        Collections.sort(SourceDateList, pinyinComparator);
//这是设置adapter
        adapter = new BrandSortAdapter(this, SourceDateList);
        sortListView.setAdapter(adapter);
        initEvent();
    }
    @Override
    public void onResume() {
        super.onResume();
        getData();
    }
    private void initEvent() {
//listview的监听事件
        sideBar.setOnTouchingLetterChangedListener(new SideBar.OnTouchingLetterChangedListener() {

            @Override
            public void onTouchingLetterChanged(String s) {
                int position = adapter.getPositionForSection(s.charAt(0));
                if (position != -1) {
                    sortListView.setSelection(position);
                }

            }
        });
        sortListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
               //这边是点击处理的事件，大家自己随意写啊
            }

        });
        /**
         * 设置滚动监听， 实时跟新悬浮的字母的值
         */
        sortListView.setOnScrollListener(new AbsListView.OnScrollListener() {

            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem,
                                 int visibleItemCount, int totalItemCount) {
//                Log.e("zzzzzzzz", "-----firstVisibleItem--->" + firstVisibleItem);
                int section = adapter.getSectionForPosition(firstVisibleItem);
                int nextSecPosition = -1;
                if (!String.valueOf((char) section).equals(" ")) {
                    for (int i = 1; i < 26; i++) {
                        if (adapter.getPositionForSection(section + i) == -1) {

                        } else {
                            nextSecPosition = adapter.getPositionForSection(section + i);
//                            Log.e("nextSecPosition", "-----nextSecPosition--->"+nextSecPosition );
                            break;
                        }
                        if (i == 25) {
                            nextSecPosition = firstVisibleItem + 1;
//                            Log.e("nextSecPosition2", "-----nextSecPosition2--->"+nextSecPosition );
                        }
                    }
                }

                if ((firstVisibleItem != lastFirstVisibleItem) && adapter.getCount() > 0) {
                    ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) xuanfuLayout
                            .getLayoutParams();
                    params.topMargin = 0;
                    xuanfuLayout.setLayoutParams(params);
                    xuanfaText.setText(String.valueOf((char) section));
                }
                if (nextSecPosition == firstVisibleItem + 1) {
//                    Log.e("nextSecPosition", "-----nextSecPosition--->" );
                    View childView = view.getChildAt(0);
                    if (childView != null) {
                        int titleHeight = xuanfuLayout.getHeight();
                        int bottom = childView.getBottom();
                        ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) xuanfuLayout
                                .getLayoutParams();
                        if (bottom < titleHeight) {
                            float pushedDistance = bottom - titleHeight;
                            params.topMargin = (int) pushedDistance;
                            xuanfuLayout.setLayoutParams(params);
                        } else {
                            if (params.topMargin != 0) {
                                params.topMargin = 0;
                                xuanfuLayout.setLayoutParams(params);
                            }
                        }
                    }
                }
                lastFirstVisibleItem = firstVisibleItem;
            }
        });
    }

    void getData(){
//获取数据
            EGRequestParams params=new EGRequestParams();
String url="";//这边是接口
            HttpUtil.post(this, url, params, new HttpUtil.Ok() {
                @Override
                public void success(String str) {
//通过modle将数据放入SourceDateList中
                    SourceDateList = JSON.parseArray(str, MyBrandListSortModel.class);
                    if (SourceDateList.size() > 0) {
                        SourceDateList = filledData(SourceDateList);
                        Collections.sort(SourceDateList, pinyinComparator);
                    }
                    updataview();
                }
                @Override
                public void complete(String str) {

                }
            });
    }
    private void updataview() {
        adapter = new BrandSortAdapter(this, SourceDateList);
        sortListView.setAdapter(adapter);
        int section = adapter.getSectionForPosition(0);
        ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) xuanfuLayout
                .getLayoutParams();
        params.topMargin = 0;
        xuanfuLayout.setLayoutParams(params);
        xuanfaText.setText(String.valueOf((char) section));
    }
    public class PinyinComparator implements Comparator<MyBrandListSortModel> {

        public int compare(MyBrandListSortModel o1, MyBrandListSortModel o2) {
            if (o1.getSortLetters().equals(" ") || !o2.getSortLetters().equals(" ")) {
                return 1;
            } else if (!o1.getSortLetters().equals(" ")
                    || o2.getSortLetters().equals(" ")) {
                return -1;
            } else {
                return o1.getSortLetters().compareTo(o2.getSortLetters());
            }
        }

    }
    /**
     * 填充数据
     *
     * @param date
     * @return
     */
    private List<MyBrandListSortModel> filledData(List<MyBrandListSortModel> date) {
        List<MyBrandListSortModel> mSortList = new ArrayList<MyBrandListSortModel>();
        List<MyBrandListSortModel> mSortListTemp = new ArrayList<MyBrandListSortModel>();
        mSortListTemp = date;
        if (date.size() == 0) {
            return mSortList;
        }
        for (int i = 0; i < date.size(); i++) {
            String pinyin = characterParser.getSelling(date.get(i).getName());
            String sortString = pinyin.substring(0, 1).toUpperCase();
            if (sortString.matches("[A-Z]")) {
                date.get(i).setSortLetters(sortString.toUpperCase());
            } else {
                date.get(i).setSortLetters(" ");
            }
        }
        for (int i = 0; i < 27; i++) {
            MyBrandListSortModel tempmodel = new MyBrandListSortModel();
            for (int j = 0; j < date.size(); j++) {
                Integer current = Integer.valueOf(mSortListTemp.get(j).getSortLetters().charAt(0));
                Integer current2 = Integer.valueOf(strzimu[i].charAt(0));
                if (current == current2) {
                    mSortList.add(date.get(j));
                }
            }
        }

        return mSortList;

    }
}

接下来把Adapter也送上吧！（BrandSortAdapter）

public class BrandSortAdapter extends BaseListAdapter {
    private List<MyBrandListSortModel> list = null;
    private Context mContext;

    public BrandSortAdapter(Context context, List<MyBrandListSortModel> list) {
        super(context, list);
        this.list=list;
        this.mContext=context;
    }

    public int getCount() {
        return this.list.size();
    }

    public Object getItem(int position) {
        return list.get(position);
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(final int position, View view, ViewGroup arg2) {
        ViewHolder viewHolder = null;
        final MyBrandListSortModel mContent = list.get(position);
        if (view == null) {
            viewHolder = new ViewHolder();
            view = LayoutInflater.from(mContext).inflate(R.layout.list_item_mycarbrand, null);
            viewHolder.tvTitle = (TextView) view
                    .findViewById(R.id.tv_user_item_name);
            viewHolder.tvLetter = (TextView) view.findViewById(R.id.catalog);
            view.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) view.getTag();
        }
        int section;
        if (list.size()>0){
            section = getSectionForPosition(position);
        }else{
            section = 0;
        }
        if (position == getPositionForSection(section)) {
            viewHolder.tvLetter.setVisibility(View.VISIBLE);
            viewHolder.tvLetter.setText(mContent.getSortLetters());
        } else {
            viewHolder.tvLetter.setVisibility(View.GONE);
        }
        MyBrandListSortModel model = list.get(position);
        String realname="- -";
        if (!StringUtils.isEmpty(model.getName())){
            realname=model.getName();
        }
        viewHolder.tvTitle.setText(realname);
        // 头像采用imageloader加载

        return view;

    }

    final static class ViewHolder {
        TextView tvLetter;
        TextView tvTitle;
    }

    /**
     * 得到首字母的ascii值
     */
    public int getSectionForPosition(int position) {
        return  list.size()>0?list.get(position).
                    getSortLetters().
                    charAt(0):Integer.valueOf(' ');


    }

    public int getPositionForSection(int section) {
        for (int i = 0; i < getCount(); i++) {
            String sortStr = list.get(i).getSortLetters();
            char firstChar = sortStr.toUpperCase().charAt(0);
            if (firstChar == section) {
                return i;
            }
        }

        return -1;
    }

    public String getAlpha(String str) {
        String sortStr = str.trim().substring(0, 1).toUpperCase();
        if (sortStr.matches("[A-Z]")) {
            return sortStr;
        } else {
            return " ";
        }
    }

    public Object[] getSections() {
        return null;
    }
}

modle也送给大家吧！MyBrandListSortModel

public class MyBrandListSortModel extends Entity implements Serializable{

    private String id;
    private String children;
    private String name;
    private String parentid;
    private String parentids;
    private String parentname;
    private String type;
    private String value;
    private String sortLetters;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getSortLetters() {
        return sortLetters;
    }

    public void setSortLetters(String sortLetters) {
        this.sortLetters = sortLetters;
    }

    public void setChildren(String children) {
        this.children = children;
    }
    public String getChildren() {
        return children;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setParentid(String parentid) {
        this.parentid = parentid;
    }

    public String getParentid() {
        return parentid;
    }

    public void setParentids(String parentids) {
        this.parentids = parentids;
    }

    public String getParentids() {
        return parentids;
    }

    public void setParentname(String parentname) {
        this.parentname = parentname;
    }

    public String getParentname() {
        return parentname;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getType() {
        return type;
    }

    public void setValue(String value) {
        this.value = value;
    }

    public String getValue() {
        return value;
    }
}

大家参考吧！

https://shop61408405.taobao.com/?spm=a1z10.5-c.0.0.cAfZMN&qq-pf-to=pcqq.group

上面链接都是一下技术视频，欢迎大家kan