如何从一列糖中返回所有数据(How to return all data from one column sugar orm)

如何从一列糖中返回所有数据(How to return all data from one column sugar orm)

如何从一个糖柱中返回所有数据？

Contact.java

import com.orm.SugarRecord; import java.util.List; public class Contact extends SugarRecord{ String name; String mail; public Contact() { } public Contact(String name, String mail) { this.name = name; this.mail = mail; }

}

MainActivity.java

List<Contact> allContacts = Contact.listAll(Contact.class); ArrayAdapter<Contact> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, android.R.id.text1, allContacts); ListView catsListView = (ListView) findViewById(R.id.listView); catsListView.setAdapter(adapter);

如何在数组中加载名称列？

How to return all data from one column sugar orm ?

Contact.java

import com.orm.SugarRecord; import java.util.List; public class Contact extends SugarRecord{ String name; String mail; public Contact() { } public Contact(String name, String mail) { this.name = name; this.mail = mail; }

}

MainActivity.java

List<Contact> allContacts = Contact.listAll(Contact.class); ArrayAdapter<Contact> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, android.R.id.text1, allContacts); ListView catsListView = (ListView) findViewById(R.id.listView); catsListView.setAdapter(adapter);

How can I Load the name column in the array?

最满意答案

查看ArrayAdapter的源代码，您无法做到这一点。

您需要按如下所示形成新的ArrayList<String>并将其传递给ArrayAdapter 。

ArrayList<String> arr = new ArrayList<>(); for(Contact contact:allContacts){ arr.add(contact.getName()); // or arr.add(contact.name); if it's public }

或者您需要定义customAdapter扩展ArrayAdapter

Looking at the source code of the ArrayAdapter you can't do that.

Either you need to form a new ArrayList<String> as follows and pass it to ArrayAdapter.

ArrayList<String> arr = new ArrayList<>(); for(Contact contact:allContacts){ arr.add(contact.getName()); // or arr.add(contact.name); if it's public }

Or you need to define customAdapter extending ArrayAdapter