ListView 的大体作用是填充数据和用户交互后产生的响应。其绑定数据方式多种，将最近学习的三种总结如下：
1、ListView 和ArrayAdapter
（1）建立一个常量类Constant，放置模拟数据
1 public final class Constant {
2 //定义一个数组
3 public static final String[] str = new String[]{"东部", "西部", "南部", "北部", "中部",
4 "东南部", "西北部", "西南部", "东北部", "中西部", "中南部", "中北部", "其他部"};
5
6 private static final String[] str_name = {"柠檬", "苹果", "土豆", "西红柿", "香蕉"};
7 private static final String[] str_class = {"水果", "水果", "蔬菜", "蔬菜", "水果"};
8 private static final String[] str_address = {"海南", "吉林", "河南", "广西", "广东"};
9
10 //把数据放到list中
11 public static List<HashMap<String, Object>> setList() {
12 List<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();
13 for (int i = 0; i < str_name.length; i++) {
14 HashMap<String, Object> hashMap = new HashMap<String, Object>();
15 hashMap.put("name", str_name[i]);
16 hashMap.put("str_class", str_class[i]);
17 hashMap.put("address", str_address[i]);
18
19 list.add(hashMap);
20 }
21 return list;
22 }
23
24 public static String[] str_arr() {
25 return str;
26 }
27 }
（2）建立一个ListView的布局文件（activity_arrary.xml）
1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 3 android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 4 android:paddingRight="@dimen/activity_horizontal_margin" 5 android:paddingTop="@dimen/activity_vertical_margin" 6 android:paddingBottom="@dimen/activity_vertical_margin" 7 tools:context="com.yt.aboutlistview.activity.ArrayActivity"> 8 9 <TextView android:text="我是ArrayActivity" 10 android:layout_width="wrap_content" 11 android:layout_height="wrap_content" 12 android:id="@+id/textView2" /> 13 14 <ListView 15 android:layout_width="wrap_content" 16 android:layout_height="wrap_content" 17 android:id="@+id/lv_arr" 18 android:layout_below="@+id/textView2" 19 android:layout_alignParentLeft="true" 20 android:layout_alignParentStart="true" /> 21 22 </RelativeLayout>
（3）在布局对应的ArrayActivity.java中绑定适配器
1 public class ArrayActivity extends Activity {
2 private ListView lv;
3 private String[] str = null;
4 @Override
5 protected void onCreate(Bundle savedInstanceState) {
6 super.onCreate(savedInstanceState);
7 // str = Constant.str_arr();
8 // str = Constant.str;//如果数组公有也可以直接调用
9 setContentView(R.layout.activity_array);
10 //获取listview对象
11 lv = (ListView) findViewById(R.id.lv_arr);
12 //和适配器绑定
13 lv.setAdapter(
14 //ArrayAdapter中三个参数，第一个：上下文，第二个listview显示的样式，但三个listview内容
15 new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,Constant.str_arr()));
16 //监听事件
17 lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
18 @Override
19 public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
20 Toast.makeText(ArrayActivity.this,"第 "+i+ "行，值是 "+view.toString(),Toast.LENGTH_LONG).show();
21 }
22 });
23 }
24 }
2、Listview 和SimpleAdapter（本例和下例都要引用1-（1）中的数据）
（1）建立布局文件activity_simple.xml(布局文件差不多，看具体使用)
1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 3 android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 4 android:paddingRight="@dimen/activity_horizontal_margin" 5 android:paddingTop="@dimen/activity_vertical_margin" 6 android:paddingBottom="@dimen/activity_vertical_margin" 7 tools:context="com.yt.aboutlistview.activity.SimpleActivity"> 8 9 <TextView android:text="SimpleAdapter" 10 android:layout_width="wrap_content" 11 android:layout_height="wrap_content" 12 android:id="@+id/textView3" /> 13 14 <ListView 15 android:layout_width="wrap_content" 16 android:layout_height="wrap_content" 17 android:id="@+id/lv_simple" 18 android:layout_below="@+id/textView3" 19 android:layout_alignParentLeft="true" 20 android:layout_alignParentStart="true" 21 android:layout_marginTop="45dp" /> 22 23 </RelativeLayout>
（2）ListView的属性文件activity_simple_item.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 > 6 7 <TextView 8 android:layout_width="wrap_content" 9 android:layout_height="wrap_content" 10 android:text="tv_sim_item_name" 11 android:id="@+id/tv_sim_item_name" 12 android:layout_alignParentTop="true" 13 android:layout_alignParentLeft="true" 14 android:layout_alignParentStart="true" 15 android:textSize="20dp"/> 16 17 <TextView 18 android:layout_width="wrap_content" 19 android:layout_height="wrap_content" 20 android:text="tv_sim_item_class" 21 android:id="@+id/tv_sim_item_class" 22 android:layout_alignParentTop="true" 23 android:layout_alignParentRight="true" 24 android:layout_alignParentEnd="true" 25 android:textSize="30dp"/> 26 27 <TextView 28 android:layout_width="wrap_content" 29 android:layout_height="wrap_content" 30 android:text="New Text" 31 android:id="@+id/tv_sim_item_address" 32 android:layout_below="@+id/tv_sim_item_name" 33 android:layout_alignParentLeft="true" 34 android:layout_alignParentStart="true" 35 android:textSize="15dp"/> 36 </RelativeLayout>
（3）在布局对应的SimpleActivity.java绑定适配器
1 public class SimpleActivity extends Activity {
2 private ListView lv;
3 List<HashMap<String,Object>> list = null;
4
5 @Override
6 protected void onCreate(Bundle savedInstanceState) {
7 super.onCreate(savedInstanceState);
8 setContentView(R.layout.activity_simple);
9
10 lv = (ListView) findViewById(R.id.lv_simple);
11 //构造一个数组
12 list = Constant.setList();
13 SimpleAdapter adapter = new SimpleAdapter(this//上下文
14 ,list//需要显示的数据
15 ,R.layout.activity_simple_item //用来显示的布局
16 , new String[]{"name","str_class","address"}//将数据映射到空间中去
17 ,new int[]{R.id.tv_sim_item_name,R.id.tv_sim_item_class,R.id.tv_sim_item_address}
18 );
19
20 //绑定数据源
21 lv.setAdapter(adapter);
22 //监听事件
23 lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
24 @Override
25 public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
26 Toast.makeText(SimpleActivity.this, "第 " + i+1 + "行，值是 " + view.toString(), Toast.LENGTH_LONG).show();
27 }
28 });
29 }
30 }
3、通用的基础适配器BaseAdapter，直接用2的布局，
(1) 定义一个适配器MyAdapter.java
1 public class Myadapter extends BaseAdapter {
2 private Context context;
3 private List<HashMap<String,Object>> list;
4 public Myadapter(Context context,List<HashMap<String,Object>> list){
5 this.context = context;
6 this.list = list;
7 }
8
9 @Override
10 public int getCount() {
11 return list.size();
12 }
13
14 @Override
15 public Object getItem(int position) {
16 return list.get(position);
17 }
18
19 @Override
20 public long getItemId(int position) {
21 return position;
22 }
23
24 @Override
25 public View getView(final int position, View view, ViewGroup viewGroup) {
26 ViewHoder hoder = null;
27 if(view == null){
28 view = View.inflate(context,R.layout.activity_simple_item,null);
29 hoder = new ViewHoder();
30
31 hoder.name = (TextView) view.findViewById(R.id.tv_sim_item_name);
32 hoder.str_class = (TextView) view.findViewById(R.id.tv_sim_item_class);
33 hoder.address = (TextView) view.findViewById(R.id.tv_sim_item_address);
34 //绑定ViewHolder对象
35 view.setTag(hoder);
36 }else {
37 hoder = (ViewHoder) view.getTag();
38 }
39 hoder.name.setText(list.get(position).get("name").toString());
40 hoder.str_class.setText(list.get(position).get("str_class").toString());
41 hoder.address.setText(list.get(position).get("address").toString());
42 hoder.str_class.setOnClickListener(new View.OnClickListener() {
43 @Override
44 public void onClick(View view) {
45 Toast.makeText(context, "第 " + position + "行，name：" + list.get(position).get("name").toString(), Toast.LENGTH_SHORT).show();
46 }
47 });
48 return view;
49 }
50
51 public final class ViewHoder{
52 public TextView name;
53 public TextView str_class;
54 public TextView address;
55 }
56 }
（2）Activity文件和Adapter进行绑定
1 public class MyAdapterActivity extends Activity {
2 private ListView lv ;
3 private List<HashMap<String,Object>> list;
4 @Override
5 protected void onCreate(Bundle savedInstanceState) {
6 super.onCreate(savedInstanceState);
7 setContentView(R.layout.activity_simple);//和simple共用
8 //setContentView(R.layout.activity_my_adapter);
9 list = Constant.setList();
10 lv = (ListView) findViewById(R.id.lv_simple);
11 Myadapter myadapter = new Myadapter(this, list);
12 lv.setAdapter(myadapter);
13 //如果需要下面可用，需要在activity_simple_item.xml把控件焦点置为失焦
14 // lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
15 // @Override
16 // public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
17 // Log.i("","第 "+i+"行，name："+list.get(i+1).get("name").toString());
18 // }
19 // });
20 }
21 }
都说岁月是一把杀猪刀，美好的一天即将又要开始了，明天还要上班，写得比较简单，主要是为了帮助本人学习记忆，如果对你也有用处，那更好，如果有不明白之处，欢迎留言。如果发现有错误，不管大神和小神路过，请告诉我，以便及时改过，愿我们每天都进步一点点。
时间： 2024-10-23 22:02:09