SimpleAdapter 和 SimpleCursorAdapter的使用

最新推荐文章于 2024-05-26 22:41:26 发布

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#object #listview #image #string #null #types

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本文介绍如何在Android应用中使用SimpleAdapter和SimpleCursorAdapter填充ListView。通过创建HashMap对象并将其添加到ArrayList中，SimpleAdapter可以轻松实现数据绑定。同时，SimpleCursorAdapter用于将Cursor数据源与UI组件连接起来，简化了从数据库读取数据的过程。

SimpleAdapter

ArrayList<HashMap<String,Object>> arr = new ArrayList<HashMap<String,Object>>(); HashMap<String,Object> map = new HashMap<String,Object>(); map.put("image", R.drawable.icon); map.put("text","杨锐"); arr.add(map); map = new HashMap<String,Object>(); map.put("image", R.drawable.icon); map.put("text","谢剑"); arr.add(map); map = new HashMap<String,Object>(); map.put("image", R.drawable.icon); map.put("text","李晨"); arr.add(map); map = new HashMap<String,Object>(); map.put("image", R.drawable.icon); map.put("text","郑慧东"); arr.add(map); SimpleAdapter sla = new SimpleAdapter(this,arr,R.layout.layout22, new String[]{"image","text"}, new int[]{R.id.iv,R.id.tv}); SimpleCursorAdapter sca = new SimpleCursorAdapter( this,R.layout.layout22,cursor, new String[]{"_id","username","phone","types","nowtime"}, new int[]{R.id.tv,R.id.tv1,R.id.tv2,R.id.tv3,R.id.tv4});

SimpleCursorAdapter

protected Cursor getList() { Cursor cursor = null; sqlbase = this.getReadableDatabase(); try { cursor = sqlbase.query(tableName, new String[]{"_id"},null,null,null,null,null); cursor.getCount(); } catch (SQLiteException e) { Log.e("!!!!!!", "getList ERROR"); closeCon(); } closeCon(); return cursor; } Cursor cursor = db.getList(); SimpleCursorAdapter sca = new SimpleCursorAdapter( this,R.layout.layout22,cursor, new String[]{"_id"}, new int[]{R.id.tv}); ListView lv = (ListView) findViewById(R.id.listv); lv.setAdapter(sca); break;