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
使用，通常情况下都这样：
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Item private List<String> mObjects;//过滤后的item private 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; } @Override public Filter getFilter() { // TODO Auto-generated method stub if (mFilter == null) { mFilter = new ArrayFilter(); } return mFilter; } private class ArrayFilter extends Filter { @Override protected FilterResults performFiltering(CharSequence prefix) { // TODO Auto-generated method stub FilterResults 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; } @Override protected void publishResults(CharSequence constraint, FilterResults results) { // TODO Auto-generated method stub mObjects = (List<String>) results.values; if (results.count > 0) { notifyDataSetChanged(); } else { notifyDataSetInvalidated(); } } } @Override public int getCount() { // TODO Auto-generated method stub return mObjects.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub //此方法有误，尽量不要使用 return mObjects.get(position); } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ViewHolder 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() { @Override public void onClick(View v) { // TODO Auto-generated method stub String 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 stub this.context=context; } public AdvancedAutoCompleteTextView(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub this.context=context; } @Override protected 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() { @Override public void onClick(View v) { // TODO Auto-generated method stub tv.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：
Java代码 
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);
}
