Adapter:SimpleAdapter SimpleCursorAdapter ArrayAdapter

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

lv.setAdapter(adapter);

 

 

以下逐一举例：

 

[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";
public final static String COLUMN_2 = "phone";

List<Map<String,String>> display;

String[] from = {COLUMN_1,COLUMN_2};
        int[] to = {android.R.id.text1,android.R.id.text2};
        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;


2. 初始化： display = new ArrayList<Map<String,String>>();


3. 使用： display = addValue();

public List<Map<String,String>> addValue(){
    	List<Map<String,String>> value = new ArrayList<Map<String,String>>();
    	
    	Map<String,String> item1 = new HashMap<String,String>();
    	item1.put(COLUMN_1, "griffin");
    	item1.put(COLUMN_2, "132123");
    	value.add(item1);
    	
    	Map<String,String> item2 = new HashMap<String,String>();
    	item2.put(COLUMN_1, "eoe.android");
    	item2.put(COLUMN_2, "132");
    	value.add(item2);
    	
    	Map<String,String> item3 = new HashMap<String,String>();
    	item3.put(COLUMN_1, "gryphone");
    	item3.put(COLUMN_2, "132342");
    	value.add(item3);
    	
    	return value;
    }

 

 

 

 

[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);
        
        String[] from ={People.NAME};
        int[] to = {android.R.id.text1};
        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
                android.R.layout.simple_list_item_1,c, from,to); 

 

 

 

[ArrayAdapter]

 

* source code

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

 

 

* sample

String[] value = {
			"JAN","FEB","MAR","APR",
            "MAY","JUN","JUL","AUG","SEP","OCT","NOV","DEC "
	};

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,value)

 

 

 

 

done!