1、ListView自定义控件下拉刷新（一）

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:layout_width="match_parent"
 3     android:layout_height="match_parent"
 4     android:background="#f5f5f5" >
 5 
 6     <zrc.widget.ZrcListView
 7         android:id="@+id/zListView"
 8         android:layout_width="match_parent"
 9         android:layout_height="match_parent" >
10     </zrc.widget.ZrcListView>
11 
12     <RelativeLayout
13         android:layout_width="match_parent"
14         android:layout_height="50dp"
15         android:layout_alignParentTop="true"
16         android:background="#ccffffff" >
17 
18         <TextView
19             android:layout_width="wrap_content"
20             android:layout_height="wrap_content"
21             android:layout_centerInParent="true"
22             android:text="常见国家"
23             android:textSize="20sp" />
24 
25         <View
26             android:layout_width="match_parent"
27             android:layout_height="1px"
28             android:layout_alignParentBottom="true"
29             android:layout_centerHorizontal="true"
30             android:background="#cccccc" />
31 
32     </RelativeLayout>
33     
34 </RelativeLayout>

  1   import java.util.ArrayList;
  3 import android.app.Activity;
  4 import android.os.Bundle;
  5 import android.os.Handler;
  6 import android.view.View;
  7 import android.view.ViewGroup;
  8 import android.widget.BaseAdapter;
  9 import android.widget.TextView;
 11 import zrc.widget.SimpleFooter;
 12 import zrc.widget.SimpleHeader;
 13 import zrc.widget.ZrcListView;
 14 import zrc.widget.ZrcListView.OnStartListener;
 15 
 16 public class MainActivity extends Activity {
 17     private ZrcListView listView;
 18     private Handler handler;
 19     private ArrayList<String> msgs;
 20     private int pageId = -1;
 21     private MyAdapter adapter;
 22 
 23     private static final String[][] names = new String[][]{
 24         {"加拿大","瑞典","澳大利亚","瑞士","新西兰","挪威","丹麦","芬兰","奥地利","荷兰","德国","日本","比利时","意大利","英国"},
 25         {"德国","西班牙","爱尔兰","法国","葡萄牙","新加坡","希腊","巴西","美国","阿根廷","波兰","印度","秘鲁","阿联酋","泰国"},
 26         {"智利","波多黎各","南非","韩国","墨西哥","土耳其","埃及","委内瑞拉","玻利维亚","乌克兰"},
 27         {"以色列","海地","中国","沙特阿拉伯","俄罗斯","哥伦比亚","尼日利亚","巴基斯坦","伊朗","伊拉克"}
 28     };
 29 
 30     @Override
 31     protected void onCreate(Bundle savedInstanceState) {
 32         super.onCreate(savedInstanceState);
 33         setContentView(R.layout.activity_main);
 34 
 35         listView = (ZrcListView) findViewById(R.id.zListView);
 36         handler = new Handler();
 37 
 38         // 设置默认偏移量，主要用于实现透明标题栏功能。（可选）
 39         float density = getResources().getDisplayMetrics().density;
 40         listView.setFirstTopOffset((int) (50 * density));
 41 
 42         // 设置下拉刷新的样式（可选，但如果没有Header则无法下拉刷新）
 43         SimpleHeader header = new SimpleHeader(this);
 44         header.setTextColor(0xff0066aa);
 45         header.setCircleColor(0xff33bbee);
 46         listView.setHeadable(header);
 47 
 48         // 设置加载更多的样式（可选）
 49         SimpleFooter footer = new SimpleFooter(this);
 50         footer.setCircleColor(0xff33bbee);
 51         listView.setFootable(footer);
 52 
 53         // 设置列表项出现动画（可选）
 54         listView.setItemAnimForTopIn(R.anim.topitem_in);
 55         listView.setItemAnimForBottomIn(R.anim.bottomitem_in);
 56 
 57         // 下拉刷新事件回调（可选）
 58         listView.setOnRefreshStartListener(new OnStartListener() {
 59             @Override
 60             public void onStart() {
 61                 refresh();
 62             }
 63         });
 64 
 65         // 加载更多事件回调（可选）
 66         listView.setOnLoadMoreStartListener(new OnStartListener() {
 67             @Override
 68             public void onStart() {
 69                 loadMore();
 70             }
 71         });
 72 
 73         adapter = new MyAdapter();
 74         listView.setAdapter(adapter);
 75         listView.refresh(); // 主动下拉刷新
 76     }
 77 
 78     private void refresh(){
 79         handler.postDelayed(new Runnable() {
 80             @Override
 81             public void run() {
 82                 // 随机数模拟成功失败。这里从有数据开始。
 83                 int rand = (int) (Math.random() * 2); 
 84                 if(rand == 0 || pageId == -1){
 85                     pageId = 0;
 86                     msgs = new ArrayList<String>();
 87                     for(String name:names[0]){
 88                         msgs.add(name);
 89                     }
 90                     adapter.notifyDataSetChanged();
 91                     listView.setRefreshSuccess("加载成功"); // 通知加载成功
 92                     listView.startLoadMore(); // 开启LoadingMore功能
 93                 }else{
 94                     listView.setRefreshFail("加载失败");
 95                 }
 96             }
 97         }, 2 * 1000);
 98     }
 99 
100     private void loadMore(){
101         handler.postDelayed(new Runnable() {
102             @Override
103             public void run() {
104                 pageId++;
105                 if(pageId<names.length){
106                     for(String name:names[pageId]){
107                         msgs.add(name);
108                     }
109                     adapter.notifyDataSetChanged();
110                     listView.setLoadMoreSuccess();
111                 }else{
112                     listView.stopLoadMore();
113                 }
114             }
115         }, 2 * 1000);
116     }
117 
118     private class MyAdapter extends BaseAdapter{
119         @Override
120         public int getCount() {
121             return msgs==null ? 0 : msgs.size();
122         }
123         @Override
124         public Object getItem(int position) {
125             return msgs.get(position);
126         }
127 
128         @Override
129         public long getItemId(int position) {
130             return position;
131         }
132 
133         @Override
134         public View getView(int position, View convertView, ViewGroup parent) {
135             TextView textView;
136             if(convertView==null) {
137                 textView = (TextView) getLayoutInflater().inflate(android.R.layout.simple_list_item_1, null);
138             }else{
139                 textView = (TextView) convertView;
140             }
141             textView.setText(msgs.get(position));
142             return textView;
143         }
144     }
145 }