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);
}

转载于：/article/3746932.html