Android SimpleCursorAdapter で ViewBinder を使う

SimpleAdapter で ViewBinder を使う方法は Android Layout CookBook に書いたので、SimpleCursorAdapter で ViewBinder を使う方法を紹介します。

SimpleCursorAdapter.ViewBinder の setViewValue() メソッドでは第２引数としてその行の Cursor と、第３引数として列の columnIndex が渡されるので、これを使ってそのカラムに表示したいデータを取得して、色を変えたり文字の大きさを変えたり表示するデータを別のテーブルからとってきたりして、対象の View にセットします。

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1. public class SimpleCursorAdapterSampleActivity extends ListActivity {  
2.   
3.     private static final String[] PHONE_PROJECTION = new String[] {  
4.         Phone._ID,  
5.         Phone.TYPE,  
6.         Phone.NUMBER  
7.     };  
8.   
9.     private static final int COLUMN_TYPE = 1;  
10.   
11.     private static final int[] COLOR_LIST = new int[] {  
12.         Color.parseColor("#002A42"),  
13.         Color.parseColor("#3DC3EA"),  
14.         Color.parseColor("#99417B"),  
15.         Color.parseColor("#F2AE30"),  
16.         Color.parseColor("#F2D338"),  
17.     };  
18.       
19.     @Override  
20.     protected void onCreate(Bundle savedInstanceState) {  
21.         super.onCreate(savedInstanceState);  
22.   
23.         Cursor c = getContentResolver().query(  
24.                 Phone.CONTENT_URI,  
25.                 PHONE_PROJECTION,   // projection  
26.                 null,   // selection  
27.                 null,   // selectionArgs  
28.                 null    // orderBy  
29.                 );  
30.         startManagingCursor(c);  
31.   
32.         SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,  
33.                 android.R.layout.simple_list_item_2,   
34.                 c,  
35.                 new String[] { Phone.TYPE, Phone.NUMBER },  
36.                 new int[] { android.R.id.text1, android.R.id.text2 });  
37.           
38.         adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {  
39.               
40.             public boolean setViewValue(View view, Cursor cursor, int columnIndex) {  
41.                 if (columnIndex == COLUMN_TYPE) {  
42.                     int type = cursor.getInt(COLUMN_TYPE);  
43.                     String text = (String) Phone.getTypeLabel(getResources(), type, null);  
44.                       
45.                     ((TextView) view).setText(text);  
46.                     ((TextView) view).setTextColor(COLOR_LIST[type % 5]);  
47.                     return true;  
48.                 }  
49.                 return false;  
50.             }  
51.         });  
52.         setListAdapter(adapter);  
53.     }  
54. }  

public class SimpleCursorAdapterSampleActivity extends ListActivity { private static final String[] PHONE_PROJECTION = new String[] { Phone._ID, Phone.TYPE, Phone.NUMBER }; private static final int COLUMN_TYPE = 1; private static final int[] COLOR_LIST = new int[] { Color.parseColor("#002A42"), Color.parseColor("#3DC3EA"), Color.parseColor("#99417B"), Color.parseColor("#F2AE30"), Color.parseColor("#F2D338"), }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Cursor c = getContentResolver().query( Phone.CONTENT_URI, PHONE_PROJECTION, // projection null, // selection null, // selectionArgs null // orderBy ); startManagingCursor(c); SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_2, c, new String[] { Phone.TYPE, Phone.NUMBER }, new int[] { android.R.id.text1, android.R.id.text2 }); adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() { public boolean setViewValue(View view, Cursor cursor, int columnIndex) { if (columnIndex == COLUMN_TYPE) { int type = cursor.getInt(COLUMN_TYPE); String text = (String) Phone.getTypeLabel(getResources(), type, null); ((TextView) view).setText(text); ((TextView) view).setTextColor(COLOR_LIST[type % 5]); return true; } return false; } }); setListAdapter(adapter); } }