Android開發入門（十二）列表控件 12.3 ListView的總結范例

編輯：Android開發教程

使用一個例子，來總結一下ListView的基本使用。

1. 新建一個工程：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。

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