ListView 中添加按钮，动态删除添加ItemView的操作

要实现添加按钮的操作，必须自定义Adapter，使用Button View的setTag()方法，将Button所属的位置设置到tag当中

要实现动态添加删除ItemView的操作，必须首先调整调整Adapter所绑定的数据源，然后调用Adapter的notifyDataSetChanged()方法

以下为实现的一个实例

package com.jason.joysmsyd;

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

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class SendMain extends ListActivity implements OnClickListener{

Button buttonMessage,buttonContact,buttonHistory;
EditText textMessage;

List<Map<String,String>> contacts = new ArrayList<Map<String,String>>();

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);

this.setContentView(R.layout.layout_send);

buttonMessage = (Button) this.findViewById(R.id.ButtonMessage);
buttonContact = (Button) this.findViewById(R.id.ButtonContact);
buttonHistory = (Button) this.findViewById(R.id.ButtonHistory);

textMessage = (EditText)this.findViewById(R.id.EditTextMessage);
textMessage.setText(this.getIntent().getExtras().getString("message"));

}

public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.ButtonMessage:
this.finish();
break;
case R.id.ButtonContact:
{
Intent intent = new Intent();
intent.setAction("com.jason.action.contact");
this.startActivityForResult(intent, 0);
}
break;
case R.id.ButtonHistory:
{
Intent intent = new Intent();
intent.setAction("com.jason.action.history");
this.startActivityForResult(intent, 1);
}
break;
}

}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 0 && resultCode == RESULT_OK) {
this.getcontactFromString(data.getExtras().getString(
UserSelectActivity.RETURN_LIST));
bindDataToList();
}
}

private void getcontactFromString(String data) {
if (data == null || data.length() == 0) {
return;
}

String[] arrayContact = data.split("#");
for (String singleContact : arrayContact) {
if (singleContact != null && singleContact.length() > 0) {
String[] props = singleContact.split(":");
if (props.length == 2) {
Map<String,String> contact = new HashMap<String,String>();
contact.put("name", props[0]);
contact.put("phone", props[1]);
contacts.add(contact);

}
}

}

}

private void bindDataToList(){
this.setListAdapter(new MyAdapter());
}

public class MyAdapter extends BaseAdapter{

public int getCount() {
// TODO Auto-generated method stub
return contacts.size();
}

public Object getItem(int position) {
// TODO Auto-generated method stub
return contacts.get(position);
}

public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
LayoutInflater inflater = SendMain.this.getLayoutInflater();
final View view = inflater.inflate(R.layout.layout_user_item, null);
final TextView textPhone = (TextView) view.findViewById(R.id.text1);
final TextView textName = (TextView) view.findViewById(R.id.text2);
Button button = (Button)view.findViewById(R.id.buttonDelete);

textPhone.setText(contacts.get(position).get("phone"));
textName.setText(contacts.get(position).get("name"));

button.setTag( position);

button.setOnClickListener(new OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
int position = Integer.parseInt(v.getTag().toString());
contacts.remove(position);
MyAdapter.this.notifyDataSetChanged();

//					SendMain.this.getListView().refreshDrawableState();
}});

return view;
}

}
}