Android 程式開發：（十二）清單控制項 —— 12.3 ListView的總結範例

使用一個例子，來總結一下ListView的基本使用。

1. 建立一個工程：ListViewDemo。

2. main.xml中的代碼。

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <Button android:id="@+id/btn"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="Show selected items"     android:onClick="onClick"/><ListView     android:id="@+id/android:list"    android:layout_width="wrap_content"    android:layout_height="wrap_content" /></LinearLayout>

3. Strings.xml中的代碼。

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="hello">Hello World, BasicViews5Activity!</string>    <string name="app_name">BasicViews5</string>    <string-array name="presidents_array">        <item>Dwight D. Eisenhower</item>        <item>John F. Kennedy</item>        <item>Lyndon B. Johnson</item>        <item>Richard Nixon</item>        <item>Gerald Ford</item>        <item>Jimmy Carter</item>        <item>Ronald Reagan</item>        <item>George H. W. Bush</item>        <item>Bill Clinton</item>        <item>George W. Bush</item>        <item>Barack Obama</item>    </string-array>        </resources>

4. ListViewDemo中的代碼。

public class ListViewDemo extends ListActivity  {    String[] presidents;        /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                        setContentView(R.layout.main);        ListView lstView = getListView();                        //lstView.setChoiceMode(ListView.CHOICE_MODE_NONE);         //lstView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);         lstView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);                lstView.setTextFilterEnabled(true);        presidents =                getResources().getStringArray(R.array.presidents_array);        setListAdapter(new ArrayAdapter<String>(this,            android.R.layout.simple_list_item_checked, presidents));    }        public void onListItemClick(    ListView parent, View v, int position, long id)    {        Toast.makeText(this,            "You have selected " + presidents[position],            Toast.LENGTH_SHORT).show();    }        // for button click event    public void onClick(View view) {    ListView lstView = getListView();        String itemsSelected = "Selected items: \n";    for (int i=0; i<lstView.getCount(); i++) {    if (lstView.isItemChecked(i)) {    itemsSelected += lstView.getItemAtPosition(i) + "\n";    }    }    Toast.makeText(this, itemsSelected, Toast.LENGTH_LONG).show();    }}

5. 按F11在模擬器上面調試。在ListView中選擇一些物件，然後點擊上面的Button，就會顯示出哪些物件被選擇了。