listview动态加载数据，并更新数据列表

package com.com.zgt.testlist;

 

import java.util.ArrayList;

import java.util.HashMap;

 

import android.os.AsyncTask;

import android.os.Bundle;

import android.app.Activity;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.ListView;

import android.widget.SimpleAdapter;

import android.widget.TextView;

 

public class MainActivity extends Activity {

 

ListView mListView;

MyAdapter adapter;

ArrayList<String> list;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        mListView = (ListView) findViewById(R.id.listView1);

        

        LayoutInflater inflater = getLayoutInflater();

        

        View v = inflater.inflate(R.layout.list_footer, null);

        

        final TextView mTextView =(TextView) v.findViewById(R.id.footer_more);

        final LinearLayout mLayout = (LinearLayout)v.findViewById(R.id.footer_loading);

        

        list = new ArrayList<String>();

        

        for(int i = 0;i<5;i++){

        list.add("zgt"+i);

        }

        

        mListView.addFooterView(v);

        

        adapter = new MyAdapter(list);

        

        mListView.setAdapter(adapter);

        

        mTextView.setOnClickListener(new OnClickListener() {

 

@Override

public void onClick(View v) {

 

 

 

 

new AsyncTask<String, String, String>() {

 

 

 

@Override

protected void onPreExecute() {

super.onPreExecute();

mTextView.setVisibility(View.GONE);

mLayout.setVisibility(View.VISIBLE);

}

 

@Override

protected String doInBackground(String... params) {

try {

Thread.sleep(1000);

list.add("zzzzzzzzzzzzz");

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return null;

}

 

@Override

protected void onPostExecute(String result) {

super.onPostExecute(result);

mTextView.setVisibility(View.VISIBLE);

mLayout.setVisibility(View.GONE);

adapter.notifyDataSetChanged();

 

}

 

 

}.execute();

 

 

 

 

 

}

});

        

       

    }

    

    

    private class MyAdapter extends BaseAdapter{

    

    private ArrayList<String> list;

    

    public MyAdapter(ArrayList<String> list) {

this.list = list;

}

 

@Override

public int getCount() {

 

return list.size();

}

 

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return list.get(position);

}

 

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

 

@Override

public View getView(int position, View view, ViewGroup parent) {

view = getLayoutInflater().inflate(R.layout.item, null);

if(list.size()>0){

ImageView img = (ImageView) view.findViewById(R.id.imageView1);

TextView mTextView = (TextView) view.findViewById(R.id.textView1);

mTextView.setText(list.get(position));

}

 

 

return view;

}

    

    }

 

   

}