自定义AutoCompleteTextView

网上找到的都是同ArrayAdapter一起使用的，有时候需要自定义风格，咋办？follow me！


看上图，实现了清空输入框内容和删除Item功能。

其实使用AutoCompleteTextView就得实现过滤器Filterable，你得告诉它怎么过滤。由于ArrayAdapter已经帮我们实现了Filterable接口，所以我们很容易忽略这个，以为AutoCompleteTextView用起来很简单。如果你使用的是BaseAdapter呢？当然，事实上也不难，只要让它也实现Filterable接口就可以了。

下面是源码：
实现自定义的Adapter

import java.util.ArrayList;import java.util.List;import qianlong.qlmobile.tablet.csco.R;import android.content.Context;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.view.View.OnClickListener;import android.widget.BaseAdapter;import android.widget.Filter;import android.widget.Filterable;import android.widget.ImageView;import android.widget.TextView;public class AutoCompleteAdapter extends BaseAdapter implements Filterable{private Context context;private ArrayFilter mFilter;private ArrayList<String> mOriginalValues;//所有的Itemprivate List<String> mObjects;//过滤后的itemprivate final Object mLock = new Object();private int maxMatch=10;//最多显示多少个选项,负数表示全部public AutoCompleteAdapter(Context context,ArrayList<String> mOriginalValues,int maxMatch){this.context=context;this.mOriginalValues=mOriginalValues;this.maxMatch=maxMatch;}@Overridepublic Filter getFilter() {// TODO Auto-generated method stubif (mFilter == null) {              mFilter = new ArrayFilter();          }          return mFilter;}private class ArrayFilter extends Filter {@Overrideprotected FilterResults performFiltering(CharSequence prefix) {// TODO Auto-generated method stubFilterResults results = new FilterResults();    //if (mOriginalValues == null) {  //                synchronized (mLock) {  //                    mOriginalValues = new ArrayList<String>(mObjects);//  //                }  //            }            if (prefix == null || prefix.length() == 0) {                  synchronized (mLock) {                Log.i("tag", "mOriginalValues.size="+mOriginalValues.size());                    ArrayList<String> list = new ArrayList<String>(mOriginalValues);                      results.values = list;                      results.count = list.size();                     return results;                }              } else {                String prefixString = prefix.toString().toLowerCase();                    final int count = mOriginalValues.size();                    final ArrayList<String> newValues = new ArrayList<String>(count);                    for (int i = 0; i < count; i++) {                    final String value = mOriginalValues.get(i);                      final String valueText = value.toLowerCase();    //                    if(valueText.contains(prefixString)){//匹配所有//                    //                    }                    // First match against the whole, non-splitted value                      if (valueText.startsWith(prefixString)) {  //源码 ,匹配开头                        newValues.add(value);                      } //                    else {  //                        final String[] words = valueText.split(" ");//分隔符匹配，效率低//                        final int wordCount = words.length;  //  //                        for (int k = 0; k < wordCount; k++) {  //                            if (words[k].startsWith(prefixString)) {  //                                newValues.add(value);  //                                break;  //                            }  //                        }  //                    }                    if(maxMatch>0){//有数量限制                          if(newValues.size()>maxMatch-1){//不要太多                              break;                          }                      }                  }                    results.values = newValues;                  results.count = newValues.size();              }                return results;}@Overrideprotected void publishResults(CharSequence constraint,FilterResults results) {// TODO Auto-generated method stubmObjects = (List<String>) results.values;              if (results.count > 0) {                  notifyDataSetChanged();              } else {                  notifyDataSetInvalidated();              }}}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn mObjects.size();}@Overridepublic Object getItem(int position) {// TODO Auto-generated method stub//此方法有误，尽量不要使用return mObjects.get(position);}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn position;}@Overridepublic View getView(final int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubViewHolder holder = null;if(convertView==null){holder=new ViewHolder();LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);convertView=inflater.inflate(R.layout.simple_list_item_for_autocomplete, null);holder.tv=(TextView)convertView.findViewById(R.id.simple_item_0);  holder.iv=(ImageView)convertView.findViewById(R.id.simple_item_1);convertView.setTag(holder);}else{holder = (ViewHolder) convertView.getTag();}holder.tv.setText(mObjects.get(position));holder.iv.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubString obj=mObjects.remove(position);mOriginalValues.remove(obj);notifyDataSetChanged();}});return convertView;}class ViewHolder {        TextView tv;        ImageView iv;    }public ArrayList<String> getAllItems(){return mOriginalValues;}}

import android.content.Context;import android.util.AttributeSet;import android.view.View;import android.widget.AutoCompleteTextView;import android.widget.ImageView;import android.widget.RelativeLayout;import android.widget.ImageView.ScaleType;public class AdvancedAutoCompleteTextView extends RelativeLayout{private Context context;private AutoCompleteTextView tv;public AdvancedAutoCompleteTextView(Context context) {super(context);// TODO Auto-generated constructor stubthis.context=context;}public AdvancedAutoCompleteTextView(Context context, AttributeSet attrs) {super(context, attrs);// TODO Auto-generated constructor stubthis.context=context;}@Overrideprotected void onFinishInflate() {super.onFinishInflate();initViews();}private void initViews() {RelativeLayout.LayoutParams params=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT,RelativeLayout.LayoutParams.WRAP_CONTENT);tv=new AutoCompleteTextView(context);tv.setLayoutParams(params);tv.setPadding(10, 0, 40, 0);//tv.setSingleLine(true);RelativeLayout.LayoutParams p=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);p.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);p.addRule(RelativeLayout.CENTER_VERTICAL);p.rightMargin=10;ImageView iv=new ImageView(context);iv.setLayoutParams(p);iv.setScaleType(ScaleType.FIT_CENTER);iv.setImageResource(R.drawable.delete);iv.setClickable(true);iv.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubtv.setText("");}});this.addView(tv);this.addView(iv);}public void setAdapter(AutoCompleteAdapter adapter){tv.setAdapter(adapter);}public void setThreshold(int threshold){tv.setThreshold(threshold);}public AutoCompleteTextView getAutoCompleteTextView(){return tv;}}

simple_list_item_for_autocomplete.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:orientation="horizontal"    android:paddingTop="5dip"    android:paddingBottom="5dip"    ><TextView android:id="@+id/simple_item_0"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:layout_weight="1"    android:paddingLeft="5dip"    android:textColor="@android:color/black"    /><ImageView android:id="@+id/simple_item_1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:scaleType="fitCenter"        android:src="@drawable/delete"        android:layout_centerVertical="true"        android:layout_marginRight="5dip"    /></LinearLayout>

使用，通常情况下都这样：

private AdvancedAutoCompleteTextView tv;private AutoCompleteAdapter adapter;private ArrayList<String> mOriginalValues=new ArrayList<String>();    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                mOriginalValues.add("1234561");        mOriginalValues.add("1234562");        mOriginalValues.add("2234563");        mOriginalValues.add("2234564");        mOriginalValues.add("3234561111");        mOriginalValues.add("32345622222");        mOriginalValues.add("323456333333");        mOriginalValues.add("3234564444");        mOriginalValues.add("3234565555");        mOriginalValues.add("32345666666");        mOriginalValues.add("32345777777");        tv = (AdvancedAutoCompleteTextView) findViewById(R.id.tv);tv.setThreshold(0);adapter = new AutoCompleteAdapter(this, mOriginalValues, 10);tv.setAdapter(adapter);    }

android自定义本地邮箱联想组件(基于MultiAutoCompleteTextView)
http://blog.csdn.net/lcq5211314123/article/details/40346263