学步园

AdapterView: ListView GridView Gallery Spinner

Adapter: SimpleAdapter SimpleCursorAdapter ArrayAdapter

[功能]

* AdapterView： 由界面决定用哪一种

* Adapter : 由数据形式决定用哪一种

AdapterView 没什么可说的 界面是人各有志 看自己的需要吧 所以今天主要介绍一下 Adapter 的使用

[前提]

因为与界面无关 所以为方便 界面统一使用 ListView 且：

ListView  lv = (ListView) findViewById(R.id.list);

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

* 使用所有Adapter

以下逐一举例：

(一) [SimpleAdapter ]

* source code:

public SimpleAdapter(Context context, List<? extends Map<String, ?>> data,int resource, String[] from, int[] to)

* sample

public final static String COLUMN_1 = "name";<br /> public final static String COLUMN_2 = "phone"; </p> <p>List<Map<String,String>> display; </p> <p>String[] from = {COLUMN_1,COLUMN_2};<br /> int[] to = {android.R.id.text1,android.R.id.text2}; </p> <p>SimpleAdapter adapter = new SimpleAdapter(this, display,android.R.layout.simple_list_item_2, from,to);

* 补充：

1. 数据源 display

1. 定义： List<Map<String,String>> display; </p> <p>2. 初始化： display = new ArrayList<Map<String,String>>(); </p> <p>3. 使用： display = addValue(); </p> <p>public List<Map<String,String>> addValue(){<br /> List<Map<String,String>> value = new ArrayList<Map<String,String>>(); </p> <p> Map<String,String> item1 = new HashMap<String,String>();<br /> item1.put(COLUMN_1, "griffin");<br /> item1.put(COLUMN_2, "132123");<br /> value.add(item1); </p> <p> Map<String,String> item2 = new HashMap<String,String>();<br /> item2.put(COLUMN_1, "eoe.android");<br /> item2.put(COLUMN_2, "132");<br /> value.add(item2); </p> <p> Map<String,String> item3 = new HashMap<String,String>();<br /> item3.put(COLUMN_1, "gryphone");<br /> item3.put(COLUMN_2, "132342");<br /> value.add(item3); </p> <p> return value;<br /> }

(二) [SimpleCursorAdapter]

* source code

public SimpleCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to)

* sample

Cursor c = getContentResolver().query(People.CONTENT_URI, null, null, null, null); </p> <p>String[] from ={People.NAME};<br /> int[] to = {android.R.id.text1};<br /> SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1,c,from,to);

(三) [ArrayAdapter]

* source code

public ArrayAdapter(Context context, int resource, int textViewResourceId, T[] objects)

* sample

String[] value = {<br /> "JAN","FEB","MAR","APR",<br /> "MAY","JUN","JUL","AUG","SEP","OCT","NOV","DEC "<br /> }; </p> <p>ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,value)

done!