android - 如何从 SQLite 获取数据到 Custome Simple Cursor 适配器并显示在列表中？

Question

我已经实现了一个应用程序来从本地移动 SQLite db 获取数据并尝试发送到 Custome Simple Cursor 适配器类。我正在从 BroadCast Reciever 接收数据它用于从 DB 获取最新记录。如果使用 SimpleCursorAdapter 那么我可以从 Sqlite DB 获取数据并更新到 UI。但我无法将 DB 内容传递给 CustomeSimpleCursorAdapter。那么如何将 db 内容传递给 CustomeSimpleCursorAdapter？

我已经实现了如下代码：

     private BroadcastReceiver myReceiver = new BroadcastReceiver() 
  {
        @Override
        public void onReceive(Context context, Intent intent) {
        msh = new MySqliteHelper(GetMsgsScreen.this);
        msh.openToWrite();
        lst = ((ListView)findViewById(R.id.listView1));
        cursor = msh.queueAll();
        getFromDB = new String[]{MySqliteHelper.USER_NAME,MySqliteHelper.USER_MESSAGE};
        toView = new int[]{R.id.usrName,R.id.msgText};
        cursor.moveToFirst(); 
          lst.setAdapter(new SimpleCursorAdapter(GetMsgsScreen.this, R.layout.test, cursor, getFromDB, toView));            
       updateList();

        }
    };

相似地，

如果我使用 CustomeSimpleCursorAdapter 而不是 SimpleCursorAdapter 那么如何显示 MySqliteHelper.USER_NAME和MySqliteHelper.USER_MESSAGE 内容以列出？请任何人帮助我。

Answer 1

如果要创建 CursorAdapter 的自定义适配器子类，则必须重写bindView和newView方法。

public class CustomCursorAdapter extends CursorAdapter {
    public CustomCursorAdapter(Context context, Cursor c) {
        super(context, c);
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        TextView username = (TextView)view.findViewById(R.id.username);
        username.setText(cursor.getString(
                cursor.getColumnIndex(MySqliteHelper.USER_NAME)));
        //  Set up other view here
        //  ...
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        LayoutInflater inflater = LayoutInflater.from(context);
        View v = inflater.inflate(R.layout.listItem, parent, false);
        bindView(v, context, cursor);
        return v;
    }
}