[转]Android ListView最佳处理方式，ListView拖动防重复数据显示，单击响应子控件

 

Android ListView最佳处理方式，ListView拖动防重复数据显示，单击响应子控件。

1、为了防止拖动ListView时，在列表末尾重复数据显示。需要加入 HashMap<Integer,View> lmap = new HashMap<Integer,View>();其中Integer为列表位置，View为子项视图，加入数据前首先if (lmap.get(position)==null) ，满足条件时，加入lmap.put(position, convertView);如果条件不满足，convertView = lmap.get(position);

2、监听每个子控件时，一定要加入final int currentPosition=position;这样可以牢牢抓住每次点击的响应位置；最好把控件集成到类中。

package logic;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import logic.PlaceAdapter.ViewHolder;

import org.guiji.BigPictureActivity;
import org.guiji.ClassUserListActivity;
import org.guiji.CommentMoodActivity;
import org.guiji.R;
import org.guiji.UserHomeActivity;

import support.ClassUserListImageDownloadTask;
import support.ImageDownloadTask;
import support.SystemConstant;
import android.content.Context;
import android.content.Intent;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class ClassUserListAdapter extends BaseAdapter {
    HashMap<Integer,View> lmap = new HashMap<Integer,View>();
    private LayoutInflater mInflater=null;
    private List<Map<String, String>> mData=null;
    private ClassUserListImageDownloadTask imgtask=null;
    private Context context;
    public List<Map<String, String>> getmData() {
        return mData;
    }

    public void setmData(List<Map<String, String>> mData) {
        this.mData = mData;
    }
    public ClassUserListAdapter(Context context){
        this.mInflater = LayoutInflater.from(context);
        this.context=context;
    }
    @Override
    public int getCount() {
        return mData.size();
    }

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

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ClassUserListViewHolder holder = null;
        if (lmap.get(position)==null) {
            imgtask=new ClassUserListImageDownloadTask();

            convertView = mInflater.inflate(R.layout.classuserlist_item, null);
            holder=new ClassUserListViewHolder();

            holder.classuserlist_item_userlogo=(ImageView)convertView.findViewById(R.id.classuserlist_item_userlogo);
            holder.classuserlist_item_username=(TextView)convertView.findViewById(R.id.classuserlist_item_username);
            holder.classuserlist_item_statuscontent=(TextView)convertView.findViewById(R.id.classuserlist_item_statuscontent);
            holder.classuserlist_item_idfans1=(TextView)convertView.findViewById(R.id.classuserlist_item_idfans1);
            holder.classuserlist_item_idfans2=(TextView)convertView.findViewById(R.id.classuserlist_item_idfans2);
            holder.classuserlist_item_idmood=(TextView)convertView.findViewById(R.id.classuserlist_item_idmood);
            holder.classuserlist_item_idhuoyuevalue=(TextView)convertView.findViewById(R.id.classuserlist_item_idhuoyuevalue);
            holder.classuserlist_item_msgpic=(ImageView)convertView.findViewById(R.id.classuserlist_item_msgpic);
            holder.classuserlist_item_msgcontent=(TextView)convertView.findViewById(R.id.classuserlist_item_msgcontent);
            holder.classuserlist_item_idtimeplace=(TextView)convertView.findViewById(R.id.classuserlist_item_idtimeplace);
            holder.classuserlist_item_classbutton=(ImageView)convertView.findViewById(R.id.classuserlist_item_classbutton);

            lmap.put(position, convertView);
            convertView.setTag(holder);

            holder.classuserlist_item_username.setText((String)mData.get(position).get("username"));
            if(mData.get(position).get("idstatuscontent")!=null){
                holder.classuserlist_item_statuscontent.setText((String)mData.get(position).get("idstatuscontent"));
                holder.classuserlist_item_statuscontent.setVisibility(0);
            }
            if(mData.get(position).get("idfans1")!=null){
                holder.classuserlist_item_idfans1.setText((String)mData.get(position).get("idfans1"));
                holder.classuserlist_item_idfans1.setVisibility(0);
            }
            if(mData.get(position).get("idfans2")!=null){
                holder.classuserlist_item_idfans2.setText((String)mData.get(position).get("idfans2"));
                holder.classuserlist_item_idfans2.setVisibility(0);
            }

            holder.classuserlist_item_idmood.setText((String)mData.get(position).get("idmood"));
            if(mData.get(position).get("idhuoyuevalue").length()>=4)
                holder.classuserlist_item_idhuoyuevalue.setText("活跃值"+"("+mData.get(position).get("idhuoyuevalue").substring(0, 4)+")");
            else
                holder.classuserlist_item_idhuoyuevalue.setText("活跃值"+"("+mData.get(position).get("idhuoyuevalue")+"0"+")");

            if(mData.get(position).get("idmsgcontent")!=null){
                holder.classuserlist_item_msgcontent.setText((String)mData.get(position).get("idmsgcontent"));
                holder.classuserlist_item_msgcontent.setVisibility(0);
            }
            if(mData.get(position).get("idtime")!=null){
                holder.classuserlist_item_idtimeplace.setText((String)mData.get(position).get("idtime")+"  "+(String)mData.get(position).get("idplace"));
                holder.classuserlist_item_idtimeplace.setVisibility(0);
            }

            String temp=SystemConstant.baseURLNone+mData.get(position).get("userlogo")+","+
            SystemConstant.baseURLNone+mData.get(position).get("idmsgpic");
            imgtask.execute(temp,holder);

        }else {
            convertView = lmap.get(position);
            holder = (ClassUserListViewHolder)convertView.getTag();
        }

        final int currentPosition=position;
        holder.classuserlist_item_userlogo.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                MainService.guiji.setCurrentURL(SystemConstant.baseURL+mData.get(currentPosition).get("userLink"));
                Intent it=new Intent(context,UserHomeActivity.class);
                context.startActivity(it);
            }
        });

        holder.classuserlist_item_username.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                MainService.guiji.setCurrentURL(SystemConstant.baseURL+mData.get(currentPosition).get("userLink"));
                Intent it=new Intent(context,UserHomeActivity.class);
                context.startActivity(it);
            }
        });
        holder.classuserlist_item_msgpic.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                MainService.guiji.setCurrentURL(SystemConstant.baseURLNone+mData.get(currentPosition).get("idmsgpic"));
                Intent it=new Intent(context,BigPictureActivity.class);
                context.startActivity(it);
            }
        });
        holder.classuserlist_item_idfans1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                MainService.guiji.deleteReply(SystemConstant.baseURL+mData.get(currentPosition).get("idfans1link"));
                ((ClassUserListActivity) context).createTask();
            }
        });
        holder.classuserlist_item_idfans2.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                MainService.guiji.deleteReply(SystemConstant.baseURL+mData.get(currentPosition).get("idfans2link"));
                ((ClassUserListActivity) context).createTask();
            }
        });

        holder.classuserlist_item_classbutton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                String temp=SystemConstant.baseURL+mData.get(currentPosition).get("idcommentlink");
//              MainService.guiji.setCurrentURL(temp);
                MainService.guiji.setPageType(4);
                MainService.guiji.setBackURL(temp);
                Intent it=new Intent(context,CommentMoodActivity.class);
                context.startActivity(it);
            }
        });

        return convertView;
    }
    public class ClassUserListViewHolder{
        public ImageView classuserlist_item_userlogo;
        public TextView classuserlist_item_username;
        public TextView classuserlist_item_statuscontent;
        public TextView classuserlist_item_idfans1;
        public TextView classuserlist_item_idfans2;
        public TextView classuserlist_item_idmood;
        public TextView classuserlist_item_idhuoyuevalue;
        public ImageView classuserlist_item_msgpic;
        public TextView classuserlist_item_msgcontent;
        public TextView classuserlist_item_idtimeplace;
        public ImageView classuserlist_item_classbutton;
    }

}