android ListView 和 BaseAdapter 应用

浏览数：20 / 时间：2015年06月11日

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：

  1     private class UpdateAdpter extends BaseAdapter {
  2 
  3         private LayoutInflater mInflater;
  4         private List<ItemData> mItemsData;
  5 
  6         public UpdateAdpter(Context context, List<ItemData> listItemData) {
  7             this.mInflater = LayoutInflater.from(context);
  8             this.mItemsData = listItemData;
  9 
 10         }
 11 
 12         @Override
 13         public int getCount() {
 14             // TODO Auto-generated method stub
 15             return mItemsData.size();
 16         }
 17 
 18         @Override
 19         public Object getItem(int position) {
 20             // TODO Auto-generated method stub
 21             return mItemsData.get(position);
 22         }
 23 
 24         @Override
 25         public long getItemId(int position) {
 26             // TODO Auto-generated method stub
 27             return position;
 28         }
 29 
 30         @Override
 31         public View getView(final int position, View convertView,
 32                 ViewGroup parent) {
 33             // TODO Auto-generated method stub
 34             ViewHolder holder;
 35             if (convertView == null) {
 36                 convertView = mInflater.inflate(
 37                         R.layout.activity_account_update_listview_item, null);
 38                 holder = new ViewHolder(convertView);
 39                 convertView.setTag(holder);
 40 
 41             } else {
 42                 holder = (ViewHolder) convertView.getTag();
 43             }
 44             ItemData item = mItemsData.get(position);
 45             holder.title.setText(item.getTitle());
 46             holder.price.setText(item.getPrice());
 47             holder.text.setText(item.getBuyText());
 48             holder.status.setText(item.getStatus());
 49 
 50             return convertView;
 51         }
 52 
 53         public class ViewHolder {
 54             public TextView title;
 55             public TextView price;
 56             public TextView buytext;
 57             public TextView status;
 58 
 59             ViewHolder(View view) {
 60                 title = (TextView) view
 61                         .findViewById(R.id.tv_accountupdateitem_title);
 62                 price = (TextView) view
 63                         .findViewById(R.id.tv_accountupdateitem_price);
 64                 text = (TextView) view
 65                         .findViewById(R.id.tv_accountupdateitem_buytext);
 66                 status = (TextView) view.findViewById(R.id.tv_accountupdate_status);
 67             }
 68         }
 69     }
 70 
 71     private class ItemData {
 72         private String title;//标题
 73         private String price;//价格
 74         private String text;//内容
 75         private String status;//状态
 76 
 77         public void setTitle(String value) {
 78             title = value;
 79         }
 80 
 81         public String getTitle() {
 82             return title;
 83         }
 84 
 85         public void setPrice(String value) {
 86             price = value;
 87         }
 88 
 89         public String getPrice() {
 90             return price;
 91         }
 92 
 93         public void setText(String value) {
 94             buytext = value;
 95         }
 96 
 97         public String getText() {
 98             return buytext;
 99         }
100         
101         public void setStatus(String value) {
102             status = value;
103         }
104 
105         public String getStatus() {
106             return status;
107         }        
108     }

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)); 
    }

item.xml;

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/white"
    android:descendantFocusability="blocksDescendants"
    android:gravity="center_vertical" >

    <LinearLayout
        android:id="@+id/lyt_roomlistview_item"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:layout_marginLeft="8dp"
            android:layout_marginRight="8dp"
            android:background="@android:color/white" >

            <TextView
                android:id="@+id/tv_accountupdateitem_title"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:gravity="center"
                android:text="title"
                android:textSize="18sp" />

            <TextView
                android:id="@+id/tv_accountupdate_status"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_marginLeft="12dp"
                android:layout_weight="1"
                android:gravity="left|center"
                android:text="button"
                android:textColor="@android:color/holo_orange_dark"
                android:textSize="16sp" />

            <TextView
                android:id="@+id/tv_accountupdateitem_price"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:gravity="center"
                android:text="price"
                android:textColor="@android:color/holo_orange_dark"
                android:textSize="16sp" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:layout_marginLeft="8dp"
            android:layout_marginRight="8dp"
            android:background="@android:color/white" >

            <TextView
                android:id="@+id/tv_accountupdateitem_buytext"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center_vertical"
                android:text="Textview"
                android:textSize="16sp" />

            <TextView
                android:id="@+id/textView2"
                android:layout_width="50dp"
                android:layout_height="30dp"
                android:layout_gravity="center"
                android:background="@android:color/holo_orange_dark"
                android:gravity="center"
                android:text="@string/title_buy"
                android:textColor="@android:color/white"
                android:textSize="16sp" />

        </LinearLayout>

    </LinearLayout>

</RelativeLayout>