android search...

最近项目中需要用到自动检索内容的需求，即通过改变检索条件来实时更新检索内容。

package com.lolaage.activity.im;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;

import com.lolaage.R;
import com.lolaage.deamon.Memory;
import com.lolaage.entity.Department;
import com.lolaage.entity.Team;
import com.lolaage.entity.User;

public class SearchAdapter extends BaseAdapter implements Filterable{

	private LayoutInflater inflater;
	private Context context;
	private List<User> list;//保存当前搜索出来的数据
	
	public SearchAdapter(Context ctx,List<User> data){
		this.context = ctx;
		this.list = data;
		inflater = LayoutInflater.from(context);
	}
	@Override
	public Filter getFilter() {//给listview添加过滤方法，根据名字检索联系人
		Filter filter = new Filter() {
			
			@Override
			protected void publishResults(CharSequence constraint, FilterResults results) {
				list = (List<User>) results.values;
				if(results.count > 0){
					notifyDataSetChanged();
				}else {
					notifyDataSetInvalidated();
				}
			}
			/**
			 * 返回检索的结果
			 */
			@Override
			protected FilterResults performFiltering(CharSequence constraint) {
				FilterResults results = new FilterResults();
				List<User> result = new ArrayList<User>();
				if(!"".equals(constraint)){
					
					synchronized (Memory.getFriendData()) {
						for(Team team : Memory.getFriendData()){
							List<User> users = team.getFriendList();
							for(int i=0;i<users.size();i++){
								User user = users.get(i);
								if(user.getNickName().toString().toLowerCase().contains(constraint)){
									result.add(user);
								}
							}
						}
					}
				}
				results.values = result;
				results.count = result.size();
				return results;
			}
		};
		return filter;
	}

	@Override
	public int getCount() {
		return list.size();
	}

	@Override
	public Object getItem(int position) {
		return list.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		HoldView holdView = null;
		if(convertView == null){
			holdView = new HoldView();
			convertView = inflater.inflate(R.layout.contact_search_item, null);
			
			holdView.name = (TextView) convertView.findViewById(R.id.tv_name);
			holdView.department = (TextView) convertView.findViewById(R.id.tv_department);
			holdView.phone = (TextView) convertView.findViewById(R.id.tv_phone);
			
			convertView.setTag(holdView);
		}else {
			holdView = (HoldView) convertView.getTag();
		}
		if(list != null && list.size() > 0){
			User user = list.get(position);
			holdView.name.setText(user.getNickName());
			holdView.phone.setText(user.getPhoneNum());
			for(int j =0;j<Memory.departments.size();j++){
				Department department = Memory.departments.get(j);
				if(user.getDepartment_id() == Integer.parseInt(department.id)){
					holdView.department.setText(department.name);
					break;
				}
			}
		}
		return convertView;
	}

	class HoldView{
		TextView name;
		TextView department;
		TextView phone;
	}
}

 

activity中的处理：

searchAdapter = new SearchAdapter(this, new ArrayList<User>());
		etSearch.addTextChangedListener(textWatcher);
		etSearch.setOnTouchListener(new OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// Log.v("LoginActivity", event.getAction()+"");
				if (event.getAction() == MotionEvent.ACTION_DOWN) {
					elv.setVisibility(View.GONE);
					llSearch.setVisibility(View.VISIBLE);//显示检索视图
					lvSearch.setAdapter(searchAdapter);
				}
				return false;
			}
		});

 

/**
	 * 文本输入框输入检索条件的观察者
	 */
	private TextWatcher textWatcher = new TextWatcher() {

		@Override
		public void onTextChanged(CharSequence s, int start, int before,
				int count) {
			// Log.v("LoginActivity", "onTextChanged");
			searchAdapter.getFilter().filter(s);
		}

		@Override
		public void beforeTextChanged(CharSequence s, int start, int count,
				int after) {
			// Log.v("LoginActivity", "beforeTextChanged");
		}

		@Override
		public void afterTextChanged(Editable s) {
			// Log.v("LoginActivity", "afterTextChanged");
			if ("".equals(etSearch.getText().toString())) {

			}
		}
	};

 

 

<?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="fill_parent"
  android:orientation="vertical"
  android:background="@drawable/group_bg">
  <LinearLayout android:id="@+id/rl_contact_search"
	                android:layout_width="fill_parent"
	                android:layout_height="wrap_content"
	                android:orientation="horizontal"
	                android:layout_alignParentTop="true">
	            <EditText android:id="@+id/et_contact_search"
	                      android:layout_width="wrap_content"
	                      android:layout_height="wrap_content"
	                      android:singleLine="true"
	                      android:layout_weight="6"
	                      android:paddingLeft="45dip"
	                      android:background="@drawable/oragi_search"
	                      android:hint="search..."/>
	</LinearLayout>
  <ExpandableListView
    android:id="@+id/elv_contact"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:cacheColorHint="#00000000"
    android:drawSelectorOnTop="false">
  </ExpandableListView>
  <RelativeLayout android:id="@+id/ll_search"
                  android:layout_width="fill_parent"
                  android:layout_height="fill_parent"
                  android:visibility="gone"
                  android:orientation="vertical"
                  android:layout_below="@+id/rl_org_search">
	<ListView android:id="@+id/list_search"
	    android:layout_alignParentTop="true"
		android:fadingEdgeLength="0.0sp" android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:drawSelectorOnTop="false"
		android:cacheColorHint="#ffffffff" android:divider="@drawable/poi_add02"
		android:dividerHeight="1.0dip"
		android:fastScrollEnabled="true" android:scrollbars="none"
		/>
	<ImageButton android:id="@+id/ibBack"
	             android:layout_width="wrap_content"
	             android:layout_height="wrap_content"
	             android:layout_alignParentBottom="true"
	             android:background="@drawable/back_btn_selector"/>
   </RelativeLayout>
  <TextView
    android:id="@+id/tv"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:visibility="gone"
    android:text="no data">
  </TextView>
    
</LinearLayout>