ListView实现字母索引

时间：2016-04-27 15:38:16 阅读：206 评论：0 收藏：0 [点我收藏+]

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参考网址：http://blog.csdn.net/appte/article/details/10306341 非常感谢~~！

ListView A~Z快速索引这种效果在通信录和城市列表中经常看到，方便用户查找，是一种增加用户体验的好方法。

实现效果：

技术分享

实现步骤：

1.自定义一个名叫SlideBar 的View。

2.在布局文件中加入这个自定义的View。

3. 在Activity中处理监听事件。

话不多说，上代码

自定义View：SlideBar.java

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
  
/** 
 * 自定义的View，实现ListView A~Z快速索引效果 
 *  
 * @author shen 
 *  
 */  
public class SlideBar extends View {  
    private Paint paint = new Paint();  
    private OnTouchLetterChangeListenner listenner;  
    // 是否画出背景  
    private boolean showBg = false;  
    // 选中的项  
    private int choose = -1;  
    // 准备好的A~Z的字母数组  
    public static String[] letters = { "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" };  
  
    // 构造方法  
    public SlideBar(Context context) {  
        super(context);  
    }  
  
    public SlideBar(Context context, AttributeSet attrs) {  
        super(context, attrs);  
    }  
  
    @Override  
    protected void onDraw(Canvas canvas) {  
        super.onDraw(canvas);  
        // 获取宽和高  
        int width = getWidth();  
        int height = getHeight();  
        // 每个字母的高度  
        int singleHeight = height / letters.length;  
        if (showBg) {  
            // 画出背景  
            canvas.drawColor(Color.parseColor("#ffebedf2"));  
        }  
        // 画字母  
        for (int i = 0; i < letters.length; i++) {  
            paint.setColor(Color.BLACK);  
            // 设置字体格式  
            paint.setAntiAlias(true);  
            paint.setTextSize(DensityUtil.dipToPixels(getContext(), 12));//使用dipToPixels()方法动态地将dp转换成px以适应不同的屏幕
            // 要画的字母的x,y坐标  
            float posX = width / 2 - paint.measureText(letters[i]) / 2;  
            float posY = i * singleHeight + singleHeight;  
            // 画出字母  
            canvas.drawText(letters[i], posX, posY, paint);  
            // 重新设置画笔  
            paint.reset();  
        }  
    }  
  
    /** 
     * 处理SlideBar的状态 
     */  
    @Override  
    public boolean dispatchTouchEvent(MotionEvent event) {  
        final float y = event.getY();  
        // 算出点击的字母的索引  
        final int index = (int) (y / getHeight() * letters.length);  
        // 保存上次点击的字母的索引到oldChoose  
        final int oldChoose = choose;  
        switch (event.getAction()) {  
        case MotionEvent.ACTION_DOWN:  
            showBg = true;  
            if (oldChoose != index && listenner != null && index >= 0  
                    && index < letters.length) {  
                choose = index;  
                listenner.onTouchLetterChange(showBg, letters[index]);  
                invalidate();  
            }  
            break;  
  
        case MotionEvent.ACTION_MOVE:  
            if (oldChoose != index && listenner != null && index >= 0  
                    && index < letters.length) {  
                choose = index;  
                listenner.onTouchLetterChange(showBg, letters[index]);  
                invalidate();  
            }  
            break;  
        case MotionEvent.ACTION_UP:  
            showBg = false;  
            choose = -1;  
            if (listenner != null) {  
                if (index <= 0) {  
                    listenner.onTouchLetterChange(showBg, "A");  
                } else if (index > 0 && index < letters.length) {  
                    listenner.onTouchLetterChange(showBg, letters[index]);  
                } else if (index >= letters.length) {  
                    listenner.onTouchLetterChange(showBg, "Z");  
                }  
            }  
            invalidate();  
            break;  
        }  
        return true;  
    }  
  
    /** 
     * 回调方法，注册监听器 
     *  
     * @param listenner 
     */  
    public void setOnTouchLetterChangeListenner(  
            OnTouchLetterChangeListenner listenner) {  
        this.listenner = listenner;  
    }  
  
    /** 
     * SlideBar 的监听器接口 
     *  
     * @author shen 
     *  
     */  
    public interface OnTouchLetterChangeListenner {  
  
        void onTouchLetterChange(boolean isTouched, String s);  
    }  
  
}

主类 MainActivity.java

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Activity;
import android.graphics.Point;
import android.os.Bundle;
import android.view.Display;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.ListView;
import android.widget.TextView;

import com.zte.server_express_company.SlideBar.OnTouchLetterChangeListenner;

public class MainActivity extends Activity {

    private SlideBar mSlideBar;
    private ListView mListView;
    private TextView float_letter;
    private LinearLayout layout1;
    private LinearLayout layout2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.select_express);
        init();
    }

    private void init() {
        layout1 = (LinearLayout) findViewById(R.id.LinearLayout1);
        layout2 = (LinearLayout) findViewById(R.id.LinearLayout2);
        int[] imgId1 = new int[]{R.drawable.yto_express,R.drawable.zto_express,R.drawable.yd_express,R.drawable.post_express,R.drawable.e_ms_express};
        int[] imgId2 = new int[]{R.drawable.zjs_express,R.drawable.sto_express,R.drawable.sf_express,R.drawable.tt_express,R.drawable.best_express};
        String[] logoStr1 = new String[]{"圆通","中通","韵达","邮政","EMS"};
        String[] logoStr2 = new String[]{"宅急送","申通","顺丰","天天","百世汇通"};
        int[] resources = new int[] { R.layout.select_express_item1,
                R.layout.select_express_item2 };
        final String[] strs = new String[] { "A", "安能物流", "B", "百世汇通", "百世快运",
                "C", "菜鸟仓-圆通速递", "菜鸟仓-中通快递", "长城快递", "E", "邮政快递EMS", "F",
                "凤凰快递", "飞康达快递", "G", "国通快递", "广深速递", "H", "华宇物流", "华运物流", "J",
                "京通物流", "佳吉快运", "L", "龙邦快递", "N", "能达快递", "Q", "全一快运", "全封快递",
                "驱达国际快递", "S", "顺丰速递", "T", "天天快递", "X", "星晨急便", "Y", "韵达快递",
                "优速物流", "Z", "中通快递", "宅急送快运", "中邮物流" };

        mSlideBar = (SlideBar) findViewById(R.id.slideBar);
        mListView = (ListView) findViewById(R.id.list);
        float_letter = (TextView) findViewById(R.id.float_letter);
        //动态创建两个用于展示快递公司的布局
        createSettledView(0, logoStr1, imgId1);
        createSettledView(1, logoStr2, imgId2);

        ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>();
        for (int i = 0; i < strs.length; i++) {
            HashMap<String, Object> map = new HashMap<String, Object>();
            map.put("tv", strs[i]);
            listItem.add(map);
        }
        MultiLayoutSimpleAdapter myAdapter = new MultiLayoutSimpleAdapter(
                MainActivity.this, listItem, resources, new String[] { "tv" },
                new int[] { R.id.tv });

        mListView.setAdapter(myAdapter);

        mSlideBar
                .setOnTouchLetterChangeListenner(new OnTouchLetterChangeListenner() {

                    @Override
                    public void onTouchLetterChange(boolean isTouched, String s) {
                        float_letter.setText(s);
                        if (isTouched) {
                            float_letter.setVisibility(View.VISIBLE);
                        } else {
                            float_letter.postDelayed(new Runnable() {

                                @Override
                                public void run() {
                                    float_letter.setVisibility(View.GONE);
                                }
                            }, 100);
                        }
                        int position = 0;
                        // 尝试用字符串数组定位
                        for (int i = 0; i < strs.length; i++) {
                            if (strs[i] == s) {
                                position = i;
                                break;
                            }
                            if (strs.length - 1 == i) {
                                return;
                            }
                        }
                        mListView.setSelection(position);
                    }
                });
    }
    
    //创建固定的LinearLayout布局
        private void createSettledView(int ViewId, String[] txtStrs, int[] imgId) {
            for (int i = 0; i < imgId.length; i++){
                //开始创建布局，用于包裹图片+文字
                //首先获取屏幕宽度 
                Display display = getWindowManager().getDefaultDisplay();
                Point size = new Point();
                display.getSize(size);
                int width = size.x / 5;
                //设置布局参数
                LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width, LayoutParams.WRAP_CONTENT);
                params.setMargins(0, 8, 0, 8);
                //开始创建布局
                LinearLayout view = new LinearLayout(this);
                //绑定布局参数
                view.setLayoutParams(params);
                view.setOrientation(LinearLayout.VERTICAL);//设置布局方向
                
                //设置view中ImageView和TextView的布局参数
                ViewGroup.LayoutParams contentParams = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
                ImageView imageView = new ImageView(this);
                TextView textView = new TextView(this);
                //绑定子布局的布局参数
                imageView.setLayoutParams(contentParams);
                textView.setLayoutParams(contentParams);
                //向ImageView和TextView中添加内容
                imageView.setImageDrawable(getResources().getDrawable(imgId[i]));
                textView.setText(txtStrs[i]);
                //设置ImageView和TextView控件各自的参数
                imageView.setPadding(0, 8, 0, 8);
                textView.setTextSize(14);
                textView.setPadding(0, 0, 0, 10);
                textView.setGravity(Gravity.CENTER);
                //将ImageView和TextView添加到布局中
                view.addView(imageView);
                view.addView(textView);
                switch(ViewId){
                case 0:
                    layout1.addView(view);
                    break;
                case 1:
                    layout2.addView(view);
                    break;
                }
            }
        }
}

MainActivity.java

屏幕像素转换类 DensityUtil.java

import java.util.logging.Logger;

import android.app.Activity;
import android.content.Context;
import android.util.DisplayMetrics;

/** 
* @ClassName: DensityUtil 
* @Description: 屏幕像素转换类
* @author soyoungboy
* @date 2014-6-17 下午4:23:26  
*/
public class DensityUtil {
    private static DensityUtil densityUtil = null;
    private static final String TAG = DensityUtil.class.getSimpleName();
    
    // 当前屏幕的densityDpi
    private static float dmDensityDpi = 0.0f;
    
    private static DisplayMetrics dm;
    
    private static float scale = 0.0f;
    
    private DensityUtil(Context context) {
        // 获取当前屏幕
        dm = new DisplayMetrics();
        // 返回当前资源对象的DispatchMetrics信息??
        //dm = context.getApplicationContext().getResources().getDisplayMetrics();
        if (context instanceof Activity) {
            ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(dm);
        }else {
            Logger.getLogger(TAG, "your context must is instance of Activity!");//TODO is it true?
            return;
        }       
        // 设置DensityDpi
        setDmDensityDpi(dm.densityDpi);
        // 密度因子
        //scale = getDmDensityDpi() / 160;// 等于 scale=dm.density;
        scale=dm.density;
    }
    
    public static DensityUtil getInstance(Context context) {
        if (densityUtil == null) {
            densityUtil = new DensityUtil(context);
        }
        return densityUtil;
    }
    
    /** 
     * @Description: 屏幕分辨率宽
     * @return    
     */
    public int getWindowWidth(){
        if (dm != null) {
            return dm.widthPixels;
        }
        return 0;
    }
    
    /** 
     * @Description: 屏幕分辩类高
     * @return     
     */
    public int getWindowHeight(){
        if (dm != null) {
            return dm.heightPixels;
        }
        return 0;
    }
    
    /** 
     * @Description: 屏幕的ppi
     * @return：float    
     */
    public float getDmDensityDpi() {
        return dmDensityDpi;
    }
    
    public void setDmDensityDpi(float dmDensityDpi) {
        DensityUtil.dmDensityDpi = dmDensityDpi;
    }
    
    public int dip2px(float dipValue) {
        
        return (int)(dipValue * scale + 0.5f);
        
    }
    
    public int px2dip(float pxValue) {
        return (int)(pxValue / scale + 0.5f);
    }
    

    /** 
     * @Description: dip转像??
     * @param context
     * @param dip
     * @return：int    
     */
    public static int dipToPixels(Context context, int dip) {
        final float SCALE = context.getResources().getDisplayMetrics().density;
        float valueDips = dip;
        int valuePixels = (int)(valueDips * SCALE + 0.5f);
        return valuePixels;
    }
    
    /** 
     * @Description: 像素转dip
     * @param context
     * @param Pixels
     * @return：float    
     */
    public static float pixelsToDip(Context context, int Pixels) {
        final float SCALE = context.getResources().getDisplayMetrics().density;
        float dips = Pixels / SCALE;
        return dips;
    }  
}

DensityUtil.java

自定义适配器 MultiLayoutSimpleAdapter.java

/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.zte.server_express_company;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import android.content.Context;
import android.net.Uri;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Checkable;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;

/**
 * 这是一个简单的适配器，可以将静态数据映射到XML文件中定义好的视图. 你可以将 Maps 的 ArrayList 指定为用于列表的数据.ArrayList
 * 中的每一项对应列表中的一行. Maps 中包含用于一行的数据.你也可以指定 XML 文件，其中定义了用于显示行的视图，通过 Map
 * 的关键字映射到指定的视图. 绑定数据到视图分两个阶段.首先，如果
 * {@link android.widget.SimpleAdapter.ViewBinder} 是有效的， 则调用
 * {@link ViewBinder#setViewValue(android.view.View, Object, String)} 方法.
 * 如果返回值为真，则执行绑定.如果返回值为假，则按以下顺序绑定视图：
 * <ul>
 * <li>实现了 Checkable 的视图（例如 CheckBox），期望绑定值是布尔类型.
 * <li>TextView，期望绑定值是字符串类型，通过调用 {@link #setViewText(TextView, String)} 绑定.
 * <li>ImageView，期望绑定值是资源 ID 或者一个字符串，通过调用 {@link #setViewImage(ImageView, int)}
 * 或 {@link #setViewImage(ImageView, String)}绑定.
 * </ul>
 * 如果没有合适的绑定发生，将会抛出 {@link IllegalStateException} 异常.
 * 
 * @author translate by 德罗德
 * @author convert by cnmahj
 */
public class MultiLayoutSimpleAdapter extends BaseAdapter implements Filterable {
    private int[] mTo;
    private String[] mFrom;
    private ViewBinder mViewBinder;

    protected List<? extends Map<String, ?>> mData;

    private int[] mResources;
    private int[] mDropDownResources;
    private LayoutInflater mInflater;

    private SimpleFilter mFilter;
    private ArrayList<Map<String, ?>> mUnfilteredData;

    /**
     * 构造函数
     * 
     * @param context
     *            与 SimpleAdapter 关联的运行着的视图的上下文.
     * @param data
     *            Map 的列表.列表中的每个条目对应一行.Maps 中包含所有在 from 中指定的数据.
     * @param resource
     *            定义列表项目的视图布局的资源 ID.布局文件至少应该包含在 to 中定义了的名称.
     * @param from
     *            与 Map 中的项目建立关联的列名的列表.
     * @param to
     *            用于显示 from 中参数中的列的视图列表.这些视图应该都是 TextView 类型的. 该列表中的第 N 个视图显示从参数
     *            from 中的第 N 列获取的值.
     */
    public MultiLayoutSimpleAdapter(Context context,
            List<? extends Map<String, ?>> data, int[] resources,
            String[] from, int[] to) {
        mData = data;
        mResources = mDropDownResources = resources;
        mFrom = from;
        mTo = to;
        mInflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getViewTypeCount() {
        return mResources.length;
    }

    /**
     * @see android.widget.Adapter#getCount()
     */
    public int getCount() {
        return mData.size();
    }

    /**
     * @see android.widget.Adapter#getItem(int)
     */
    public Object getItem(int position) {
        return mData.get(position);
    }

    /**
     * @see android.widget.Adapter#getItemId(int)
     */
    public long getItemId(int position) {
        return position;
    }

    /**
     * @see android.widget.Adapter#getView(int, View, ViewGroup)
     */
    public View getView(int position, View convertView, ViewGroup parent) {
        int type = 0;

        /**
         * 判断当前Viwe将要放置的内容是字母还是中文，如果是字母则置 type = 1 ，使用item2布局；如果是中文则置 type = 0，使用item1布局
         */
        final Map<String, ?> myDataSet = mData.get(position);
        final String[] myFrom = mFrom;
        final Object data = myDataSet.get(myFrom[0]);
        String text = data == null ? "" : data.toString();

        if ((text + "").getBytes().length == 1) {
            type = 1;// 英文
            System.out.print("type=" + type + " 执行完毕！");
        }

        return createViewFromResource(position, convertView, parent,
                mResources[type]);
    }

    private View createViewFromResource(int position, View convertView,
            ViewGroup parent, int resource) {
        View v;
        // if (convertView == null) {
        // v = mInflater.inflate(resource, parent, false);
        // } else {
        // v = convertView;
        // }
        v = mInflater.inflate(resource, parent, false);
        bindView(position, v);

        return v;
    }

    /**
     * <p>
     * 设置创建下拉列表视图的布局资源 ID.
     * </p>
     * 
     * @param resource
     *            定义下拉列表视图的布局资源 ID.
     * @see #getDropDownView(int, android.view.View, android.view.ViewGroup)
     */
    public void setDropDownViewResource(int[] resources) {
        this.mDropDownResources = resources;
    }

    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        return createViewFromResource(position, convertView, parent,
                mResources[getItemViewType(position)]);
    }

    private void bindView(int position, View view) {
        final Map<String, ?> dataSet = mData.get(position);
        if (dataSet == null) {
            return;
        }

        final ViewBinder binder = mViewBinder;
        final String[] from = mFrom;
        final int[] to = mTo;
        final int count = to.length;

        for (int i = 0; i < count; i++) {
            final View v = view.findViewById(to[i]);
            if (v != null) {
                final Object data = dataSet.get(from[i]);
                String text = data == null ? "" : data.toString();
                if (text == null) {
                    text = "";
                }

                boolean bound = false;
                if (binder != null) {
                    bound = binder.setViewValue(v, data, text);
                }

                if (!bound) {
                    if (v instanceof Checkable) {
                        if (data instanceof Boolean) {
                            ((Checkable) v).setChecked((Boolean) data);
                        } else if (v instanceof TextView) {
                            // Note: keep the instanceof TextView check at the
                            // bottom of these
                            // ifs since a lot of views are TextViews (e.g.
                            // CheckBoxes).
                            setViewText((TextView) v, text);
                        } else {
                            throw new IllegalStateException(v.getClass()
                                    .getName()
                                    + " should be bound to a Boolean, not a "
                                    + (data == null ? "<unknown type>"
                                            : data.getClass()));
                        }
                    } else if (v instanceof TextView) {
                        // Note: keep the instanceof TextView check at the
                        // bottom of these
                        // ifs since a lot of views are TextViews (e.g.
                        // CheckBoxes).
                        setViewText((TextView) v, text);
                    } else if (v instanceof ImageView) {
                        if (data instanceof Integer) {
                            setViewImage((ImageView) v, (Integer) data);
                        } else {
                            setViewImage((ImageView) v, text);
                        }
                    } else if (v instanceof Spinner) {
                        if (data instanceof Integer) {
                            ((Spinner) v).setSelection((Integer) data);
                        } else {
                            continue;
                        }
                    } else {
                        throw new IllegalStateException(
                                v.getClass().getName()
                                        + " is not a "
                                        + " view that can be bounds by this SimpleAdapter");
                    }
                }
            }
        }
    }

    /**
     * 返回用于将数据绑定到视图的 {@link ViewBinder}.
     * 
     * @return ViewBinder，如果绑定器不存在则返回 null.
     * 
     * @see #setViewBinder(android.widget.SimpleAdapter.ViewBinder)
     */
    public ViewBinder getViewBinder() {
        return mViewBinder;
    }

    /**
     * 设置用于将数据绑定到视图的绑定器.
     * 
     * @param viewBinder
     *            用于将数据绑定到视图的绑定器.设置为 null，可以删除既存的绑定器.
     * 
     * @see #getViewBinder()
     */
    public void setViewBinder(ViewBinder viewBinder) {
        mViewBinder = viewBinder;
    }

    /**
     * 由 bindView() 方法调用，用于为 ImageView 设置图像.只在 ViewBinder 不存在或者既存的 ViewBinder
     * 无法处理 ImageView 的绑定时才调用.
     * 
     * 如果调用 {@link #setViewImage(ImageView, String)} 方法时提供的 value
     * 参数可以转换为整数类型，则会自动调用本方法.
     * 
     * @param v
     *            接收图像的 ImageView.
     * @param value
     *            从数据集获取到的值
     * 
     * @see #setViewImage(ImageView, String)
     */
    public void setViewImage(ImageView v, int value) {
        v.setImageResource(value);
    }

    /**
     * 由 bindView() 方法调用，用于为 ImageView 设置图像.只在 ViewBinder 不存在或者既存的 ViewBinder
     * 无法处理 ImageView 的绑定时才调用.
     * 
     * 本方法默认将 value 作为图像资源 ID 来对待；当 value 无法变换为整数类型时，才作为图像的 Uri 来使用.
     * 
     * @param v
     *            接收图像的 ImageView.
     * @param value
     *            从数据集获取到的值.
     * 
     * @see #setViewImage(ImageView, int)
     */
    public void setViewImage(ImageView v, String value) {
        try {
            v.setImageResource(Integer.parseInt(value));
        } catch (NumberFormatException nfe) {
            v.setImageURI(Uri.parse(value));
        }
    }

    /**
     * 由 bindView() 方法调用，用于为 TextView 设置文本.只在 ViewBinder 不存在或者既存的 ViewBinder
     * 无法处理 TextView 的绑定时才调用.
     * 
     * @param v
     *            接收文本的 TextView.
     * @param text
     *            设置到 TextView 的文本.
     */
    public void setViewText(TextView v, String text) {
        v.setText(text);
    }

    public Filter getFilter() {
        if (mFilter == null) {
            mFilter = new SimpleFilter();
        }
        return mFilter;
    }

    /**
     * 该类用于 SimpleAdapter 的外部客户将适配器的值绑定到视图.
     * 
     * 你可以使用此类将 SimpleAdapter 不支持的值绑定到视图，或者改变 SimpleAdapter 支持的视图的绑定方式.
     * 
     * @see MultiLayoutSimpleAdapter#setViewImage(ImageView, int)
     * @see MultiLayoutSimpleAdapter#setViewImage(ImageView, String)
     * @see MultiLayoutSimpleAdapter#setViewText(TextView, String)
     */
    public static interface ViewBinder {
        /**
         * 绑定指定的数据到指定的视图.
         * 
         * 当使用 ViewBinder 绑定了数据时，必须返回真.如果该方法返回假， SimpleAdapter 会用自己的方式去绑定数据.
         * 
         * @param view
         *            要绑定数据的视图
         * @param data
         *            绑定用的数据
         * @param textRepresentation
         *            代表所提供的数据的安全字符串： 或者是 data.toString()，或者是空串，不能为空.
         * 
         * @return 如果将数据绑定到了视图，返回真；否则返回假.
         */
        boolean setViewValue(View view, Object data, String textRepresentation);
    }

    /**
     * <p>
     * An array filters constrains the content of the array adapter with a
     * prefix. Each item that does not start with the supplied prefix is removed
     * from the list.
     * </p>
     */
    private class SimpleFilter extends Filter {

        @Override
        protected FilterResults performFiltering(CharSequence prefix) {
            FilterResults results = new FilterResults();

            if (mUnfilteredData == null) {
                mUnfilteredData = new ArrayList<Map<String, ?>>(mData);
            }

            if (prefix == null || prefix.length() == 0) {
                ArrayList<Map<String, ?>> list = mUnfilteredData;
                results.values = list;
                results.count = list.size();
            } else {
                String prefixString = prefix.toString().toLowerCase();

                ArrayList<Map<String, ?>> unfilteredValues = mUnfilteredData;
                int count = unfilteredValues.size();

                ArrayList<Map<String, ?>> newValues = new ArrayList<Map<String, ?>>(
                        count);

                for (int i = 0; i < count; i++) {
                    Map<String, ?> h = unfilteredValues.get(i);
                    if (h != null) {

                        int len = mTo.length;

                        for (int j = 0; j < len; j++) {
                            String str = (String) h.get(mFrom[j]);

                            String[] words = str.split(" ");
                            int wordCount = words.length;

                            for (int k = 0; k < wordCount; k++) {
                                String word = words[k];

                                if (word.toLowerCase().startsWith(prefixString)) {
                                    newValues.add(h);
                                    break;
                                }
                            }
                        }
                    }
                }

                results.values = newValues;
                results.count = newValues.size();
            }

            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint,
                FilterResults results) {
            // noinspection unchecked
            mData = (List<Map<String, ?>>) results.values;
            if (results.count > 0) {
                notifyDataSetChanged();
            } else {
                notifyDataSetInvalidated();
            }
        }
    }
}

MultiLayoutSimpleAdapter.java

xml文件

select_express.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:background="@color/background" >

    <RelativeLayout 
        android:layout_width="match_parent"
        android:layout_height="49dp"
        android:background="#39AFFF" >

        <ImageView
            android:id="@+id/back"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_marginLeft="10dp"
            android:layout_marginStart="10dp"
            android:contentDescription="@null"
            android:src="@drawable/back" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="选择快递公司"
            android:textColor="#FFFFFF"
            android:textSize="18sp" />
    </RelativeLayout>
    
    <LinearLayout 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:background="@color/white">
        
        <!-- 1 -->
        <LinearLayout 
            android:id="@+id/LinearLayout1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            
        </LinearLayout>
        
        <!-- 2 -->
        <LinearLayout 
            android:id="@+id/LinearLayout2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="20dp"
            android:orientation="horizontal">
            
        </LinearLayout>
    </LinearLayout>
    
    <View 
        android:layout_width="match_parent"
        android:layout_height="1px"
        android:background="@color/divider_efedf1"/>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/white" >

        <ListView
            android:id="@+id/list"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scrollbars="none" />

        <TextView
            android:id="@+id/float_letter"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_gravity="center"
            android:background="@color/color_39afff"
            android:layout_centerVertical="true"
            android:layout_centerHorizontal="true"
            android:layout_centerInParent="true"
            android:gravity="center"
            android:textSize="40sp"
            android:visibility="gone" />

        <com.zte.server_express_company.SlideBar
            android:id="@+id/slideBar"
            android:layout_width="30dp"
            android:layout_height="match_parent"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true" />
    </RelativeLayout>

</LinearLayout>

select_express.xml

select_express_item1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="62dp"
    android:orientation="vertical" >
    
    <TextView 
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textSize="16sp"
        android:textColor="@color/textColor"
        android:layout_marginLeft="20dp"
        android:layout_marginStart="20dp"
        android:gravity="center_vertical"
        android:text="@string/hello_world"/>

</LinearLayout>

select_express_item1.xml

select_express_item2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="24dp"
    android:orientation="vertical"
    android:background="@color/background" >
    
    <TextView 
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textSize="16sp"
        android:textColor="@color/color_afb8c9"
        android:layout_marginLeft="20dp"
        android:layout_marginStart="20dp"
        android:gravity="center_vertical"
        android:text="@string/hello_world"/>

</LinearLayout>

select_express_item2.xml

ListView实现字母索引

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原文地址：http://www.cnblogs.com/shen-smile/p/5438997.html

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