android ListView 和 BaseAdapter 应用

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步聚：

1.建立ListView对象；--（作用：绑定Adapter呈现数据）

2.建立ListView实现的Item栏位.xml布局；--（作用：实现ListView的栏位布局）

3.建立Item.xml 的View数据实例（类）；--（作用：实现Item栏位数据接口）

4.继承BaseAdapter建立MyAdapter类class；--（作用：封装ListView的.xml布局与Item数据）

5.当然还要作更多的操作，这里例出简洁的方法；

adapter实现：

private class UpdateAdpter extends BaseAdapter { private LayoutInflater mInflater;
private List<ItemData> mItemsData; public UpdateAdpter(Context context, List<ItemData> listItemData) {
this.mInflater = LayoutInflater.from(context);
this.mItemsData = listItemData; } @Override
public int getCount() {
// TODO Auto-generated method stub
return mItemsData.size();
} @Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mItemsData.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;
if (convertView == null) {
convertView = mInflater.inflate(
R.layout.activity_account_update_listview_item, null);
holder = new ViewHolder(convertView);
convertView.setTag(holder); } else {
holder = (ViewHolder) convertView.getTag();
}
ItemData item = mItemsData.get(position);
holder.title.setText(item.getTitle());
holder.price.setText(item.getPrice());
holder.text.setText(item.getBuyText());
holder.status.setText(item.getStatus()); return convertView;
} public class ViewHolder {
public TextView title;
public TextView price;
public TextView buytext;
public TextView status; ViewHolder(View view) {
title = (TextView) view
.findViewById(R.id.tv_accountupdateitem_title);
price = (TextView) view
.findViewById(R.id.tv_accountupdateitem_price);
text = (TextView) view
.findViewById(R.id.tv_accountupdateitem_buytext);
status = (TextView) view.findViewById(R.id.tv_accountupdate_status);
}
}
} private class ItemData {
private String title;//标题
private String price;//价格
private String text;//内容
private String status;//状态 public void setTitle(String value) {
title = value;
} public String getTitle() {
return title;
} public void setPrice(String value) {
price = value;
} public String getPrice() {
return price;
} public void setText(String value) {
buytext = value;
} public String getText() {
return buytext;
} public void setStatus(String value) {
status = value;
} public String getStatus() {
return status;
}
}

activity调有实例：

public class UpdateActivity extends Activity implements OnClickListener{
private ListView UpdateLView; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_account_update);
iniView();
} public void iniView() {
UpdateLView = (ListView) findViewById(R.id.account_update_listView);
iniListViewDataUpdate();//初始listview数据
} @Override
public void onClick(View v) {
// TODO Auto-generated method stub
} private void iniListViewDataUpdate(){
ItemData itemData;
List<ItemData> listItemData = new ArrayList<ItemData>(); for (int i=0;i<2;i++){
itemData= new ItemData();
itemData.setTitle("title");
itemData.setPrice("price");
itemData.setText("text");
itemData.setStatus("status"); listItemData.add(itemData);
}
nowUpdateLView.setAdapter(new UpdateAdpter(this,listItemData));
}