android Adapter笔记

14.03.04


数据库适配器

游标适配器cursorAdapter

Newview:创建行布局对象

Bindview:更新数据

Id默认必须为_id

private void show() {
        Cursor cursor = mDb.query("students", null, null, null, null, null, null);
        String[] from=new String[]{"name","phone"};
        int[] to=new int[]{R.id.textView1,R.id.textView2};
        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.item_list, cursor, from, to);
        listview.setAdapter(adapter);
}


若任然报错,将数据库表删除


适配器声明为成员变量,则添加数据后无显示


添加显示:

   重新遍历游标


private void show() {
        Cursor cursor = mDb.query("students", null, null, null, null, null, null);
        String[] from=new String[]{"name","phone"};
        int[] to=new int[]{R.id.textView1,R.id.textView2};
        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.item_list, cursor, from, to);
        listview.setAdapter(adapter);
}



simpleCursorAdapter:简单游标适配器

显示


优:代码结构简单

缺:支持的控件有限

textviewimageviewradiobuttoncheckboxCompoundButton


private void show() {
        Cursor cursor = mDb.query("students", null, null, null, null, null, null);
        String[] from=new String[]{"name","phone"};
        int[] to=new int[]{R.id.textView1,R.id.textView2};
        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.item_list, cursor, from, to);
        listview.setAdapter(adapter);
}



android Adapter笔记,,5-wow.com

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