本文实例分析了Android中ListView用法。分享给大家供大家参考，具体如下：
通过在Layout中添加ListView Widget可以达到在页面布局具有列表效果的交互页面。在这里通过举例来说明怎样在Layout中添加ListView以及怎样应用。
配合设计了两个事件Listener: OnItemSelectedListener事件为鼠标的滚轮转动时所选择的值；OnItemClickListener事件则为当鼠标单击时，所触发的事件。由此可以区别出list中的“选择”与“单击”差异。
使用ArrayAdapter(Context context, int textViewResourceId , T[] objects)这个构造器，其中textViewResourceId是定义在“res/layout/my_simple_list_item.xml”里的资源ResourceID(R.layout.my_simple_list_item),里面使用CheckedTextView来取得ListView中选择的项目。
程序中使用了LinearLayout对象，动态地将TextView与ListView附加进原有的Layout布局当中。用LinearLayout.LayoutParams来创建对象param1,再调用LinearLayout的addView方法将TextView和ListView以及params对象传入。
程序如下所示：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
public class A07Activity extends Activity { private static final String[]week="sunday","monday","tuesday","wednesday","thursday","friday","saturday"}; private TextView tv; private ListView lv; private ArrayAdapter<String> aa; private LinearLayout ll; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); tv=new TextView(this); tv.setText(R.string.title); tv.setTextColor(Color.RED); lv=new ListView(this); lv.setBackgroundColor(Color.GREEN); ll=new LinearLayout(this); ll.setOrientation(LinearLayout.VERTICAL); ll.setBackgroundColor(android.graphics.Color.YELLOW); aa=new ArrayAdapter<String>(A07Activity.this,R.layout.my_simple_list,week); lv.setAdapter(aa); LinearLayout.LayoutParams params01=new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT); ll.addView(lv, params01); LinearLayout.LayoutParams params02=new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT); ll.addView(tv, params02); setContentView(ll); lv.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub tv.setText("你选择的是："+arg0.getSelectedItem().toString()); } @Override public void onNothingSelected(AdapterView<?> arg0) { // TODO Auto-generated method stub } }); lv.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub tv.setText("你选择的是："+week[arg2]); } }); }} |
res/layout/my_simple_list.xml如下:
|
1
2
3
4
5
6
7
8
|
<?xml version="1.0" encoding="utf-8"?><CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/myCheckedTextView1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"/> |
希望本文所述对大家Android程序设计有所帮助。
