
平台论坛博客文库

› 论坛 › 操作系统 › 移动操作系统 › 通过改写ArrayAdapter 用AutoCompleteTextView 实现汉字 ...

通过改写ArrayAdapter 用AutoCompleteTextView 实现汉字和拼音双向关联 [复制链接]

凝望长空

家境小康

论坛徽章:: 0

电梯直达

1楼 [收藏(0)] [报告]

发表于 2012-03-04 14:51 |只看该作者 |倒序浏览

通过改写ArrayAdapter 用AutoCompleteTextView 实现汉字和拼音双向关联

package com.bn.lccx;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;
public class CityAdapter<T> extends BaseAdapter implements Filterable
{
private List<T> mObjects;//城市名称汉字数组
private List<T> mObjects2;//城市名称拼音数组
private final Object mLock = new Object();
private int mResource;//展示数组适配器内容的View Id
private int mDropDownResource;//下拉框中内容的Id
private int mFieldId = 0;//下拉框选项ID
private boolean mNotifyOnChange = true;
private Context mContext;//当前上下文对象 - Activity
private ArrayList<T> mOriginalValues;//原始数组列表
private ArrayFilter mFilter;//
private LayoutInflater mInflater;
public CityAdapter(Context context, int textViewResourceId, T[] objects,T[] objects2)
{
init(context, textViewResourceId, 0, Arrays.asList(objects),Arrays.asList(objects2));
}
public void add(T object)
{
if (mOriginalValues != null)
{
synchronized (mLock)
{
mOriginalValues.add(object);
if (mNotifyOnChange) notifyDataSetChanged();
}
}
else
{
mObjects.add(object);
if (mNotifyOnChange) notifyDataSetChanged();
}
}
public void insert(T object, int index)
{
if (mOriginalValues != null)
{
synchronized (mLock)
{
mOriginalValues.add(index, object);
if (mNotifyOnChange) notifyDataSetChanged();
}
}
else
{
mObjects.add(index, object);
if (mNotifyOnChange) notifyDataSetChanged();
}
}
public void remove(T object)
{
if (mOriginalValues != null)
{
synchronized (mLock)
{
mOriginalValues.remove(object);
}
}
else
{
mObjects.remove(object);
}
if (mNotifyOnChange) notifyDataSetChanged();
}
public void clear() //从列表中删除所有的信息
{
if (mOriginalValues != null)
{
synchronized (mLock)
{
mOriginalValues.clear();
}
}
else
{
mObjects.clear();
}
if (mNotifyOnChange) notifyDataSetChanged();
}
public void sort(Comparator<? super T> comparator)//根据指定的比较器对适配器中的内容进行排序
{
Collections.sort(mObjects, comparator);
if (mNotifyOnChange) notifyDataSetChanged();
}
@Override
public void notifyDataSetChanged()
{
super.notifyDataSetChanged();
mNotifyOnChange = true;
}
//设置自动修改
public void setNotifyOnChange(boolean notifyOnChange)
{
mNotifyOnChange = notifyOnChange;
}
//构造器 -- 初始化所有信息
private void init(Context context, int resource, int textViewResourceId, List<T> objects ,List<T> objects2)
{
mContext = context;
mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mResource = mDropDownResource = resource;
mObjects = objects;
mObjects2 = objects2;
mFieldId = textViewResourceId;
}
//返回数组适配器相关联的上下文对象
public Context getContext()
{
return mContext;
}
public int getCount() //返回城市名称汉字列表的大小
{
return mObjects.size();
}
public T getItem(int position)//返回城市名称汉字列表中指定位置的字符串的值
{
return mObjects.get(position);
}
public int getPosition(T item)//返回城市名称汉字列表中指定的字符串值的索引
{
return mObjects.indexOf(item);
}
public long getItemId(int position)//将int型整数以长整型返回
{
return position;
}
public View getView(int position, View convertView, ViewGroup parent)//创建View
{
return createViewFromResource(position, convertView, parent, mResource);
}
private View createViewFromResource(int position, View convertView, ViewGroup parent,//创建View
int resource)
{
View view;
TextView text;
if (convertView == null) //如果当前为空
{
view = mInflater.inflate(resource, parent, false);
}
else //如果不为空
{
view = convertView;
}
try {
if (mFieldId == 0) //如果当前域为空,假定所有的资源就是一个TextView
{
text = (TextView) view;
}
else//否则,在界面中找到TextView
{
text = (TextView) view.findViewById(mFieldId);
}
}
catch (ClassCastException e) //异常处理
{
throw new IllegalStateException
(
"ArrayAdapter requires the resource ID to be a TextView", e
);
}
text.setText(getItem(position).toString());//为Text设值 -返回当前城市名称汉字列表中选中的值
return view;
}
public void setDropDownViewResource(int resource) //创建下拉视图
{
this.mDropDownResource = resource;
}
@Override
public View getDropDownView(int position, View convertView, ViewGroup parent)
{
return createViewFromResource(position, convertView, parent, mDropDownResource);
}
public static ArrayAdapter<CharSequence> createFromResource(Context context,//从外部资源中创建新的数组适配器
int textArrayResId, int textViewResId)
{
CharSequence[] strings = context.getResources().getTextArray(textArrayResId);//创建字符创序列
return new ArrayAdapter<CharSequence>(context, textViewResId, strings);//返回数组适配器
}
public Filter getFilter() //得到过滤器
{
if (mFilter == null)//如果为空,创建数组过滤器
{
mFilter = new ArrayFilter();
}
return mFilter;
}
//数组过滤器限制数组适配器以指定的前缀开头,如果跟提供的前缀不匹配,则将其从中删除
private class ArrayFilter extends Filter
{
@Override
protected FilterResults performFiltering(CharSequence prefix)//执行过滤
{
FilterResults results = new FilterResults();//创建FilterResults对象
if (mOriginalValues == null) //如果为空
{
synchronized (mLock)
{
mOriginalValues = new ArrayList<T>(mObjects);
}
}
if (prefix == null || prefix.length() == 0)
{
synchronized (mLock)
{
ArrayList<T> list = new ArrayList<T>(mOriginalValues);
results.values = list;
results.count = list.size();
}
}
else
{
String prefixString = prefix.toString().toLowerCase();//转换成小写
final ArrayList<T> values = mOriginalValues;
final int count = values.size();
final ArrayList<T> newValues = new ArrayList<T>(count);
for (int i = 0; i < count; i++)
{
final T value = values.get(i);
final String valueText = value.toString().toLowerCase();
final T value2 = mObjects2.get(i);
final String valueText2 = value2.toString().toLowerCase();
//查找拼音
if(valueText2.startsWith(prefixString))
{
newValues.add(value);
}//查找汉字
else if(valueText.startsWith(prefixString))
{
newValues.add(value);
}
else
{ //添加汉字关联
final String[] words = valueText.split(" ");
final int wordCount = words.length;
for (int k = 0; k < wordCount; k++)
{
if (words[k].startsWith(prefixString))
{
newValues.add(value);
break;
}
}
//添加拼音关联汉字
final String[] words2 = valueText2.split(" ");
final int wordCount2 = words2.length;
for (int k = 0; k < wordCount2; k++)
{
if (words2[k].startsWith(prefixString))
{
newValues.add(value);
break;
}
}
}
}
results.values = newValues;
results.count = newValues.size();
}
return results;
}
@SuppressWarnings("unchecked")
protected void publishResults(CharSequence constraint, FilterResults results)
{
mObjects = (List<T>) results.values;
if (results.count > 0)
{
notifyDataSetChanged();
} else
{
notifyDataSetInvalidated();
}
}
}
}

复制代码

文库|博客

冰释一片天

稍有积蓄

论坛徽章:: 0

2楼 [报告]

发表于 2012-03-04 14:51 |只看该作者

谢谢分享

实战分享：从技术角度谈机器学习入门| 【大话IT】RadonDB低门槛向MySQL集群下战书 | ChinaUnix打赏功能已上线！ | 新一代分布式关系型数据库RadonDB知多少？

返回列表

Chinaunix › 论坛 › 操作系统 › 移动操作系统 › 通过改写ArrayAdapter 用AutoCompleteTextView 实现汉字 ...

通过改写ArrayAdapter 用AutoCompleteTextView 实现汉字和拼音双向关联 [复制链接]

浏览过的版块