Question

public List<Contact> getAllContacts() {
        List<Contact> contactList = new ArrayList<Contact>();
        // Select All Query
        String selectQuery = "SELECT  * FROM " + TABLE_CONTACTS;

        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);

        // looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {
                Contact contact = new Contact();
                contact.setID(Integer.parseInt(cursor.getString(0)));
                contact.setPerkara(cursor.getString(1));
                contact.setTarikhKejadian(cursor.getString(2));
                contact.setMasaMula(cursor.getString(3));
                contact.setMasaAkhir(cursor.getString(4));
                // Adding contact to list
                contactList.add(contact);
            } while (cursor.moveToNext());
        }

        // return contact list
        return contactList;
    }

这是我用来从SQLite调用数据的方法。数据在那里。但我不知道如何调用它并将数据放在列表视图中。

我在我的java程序中使用List<Contact> contacts = db.getAllContacts();，然后我坚持了我只展示如何在日志中查看数据的示例。

我应该使用什么方法从数据库中调用数据并在列表视图中查看它？

Answer 1

如上所述，您必须使用我自己创建的适配器并将其添加到ListView。这大概就是你要做的事情，代码有点粗糙，因为它在这里直接进入文本编辑器：

public class ContactListAdapter extends ListAdapter<String> {

 private final List contacts;

//Call to super to set up the adapter
  public ContactListAdapter(Context context, List<Contact> contacts) {
    super(context, R.layout.rowlayout, values);
    this.contacts = contacts;
}

@Override
  public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    //Get your View
    View rowView = inflater.inflate(R.layout.rowlayout, parent, false);

    //create the emelements you want to add to list
    TextView textView = (TextView) rowView.findViewById(R.id.label);
    textView.setText(contacts.get(position).getId())

    return rowView
}
}

然后将此适配器添加到ListView并初始化

希望这有助于你

android查看数据从数据库到列表视图

1 个答案: