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：

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.youkuaiyun.com/lcq5211314123/article/details/40346263

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