基于接口编程示例——联系人列表

代码地址
https://github.com/MuchContact/TreeViewForContactBook.git

1. 模型

联系人列表组件关心的模型只有三个：

GroupRepository 模型入口，获取分组信息
Group 掌管每个组的内部信息
ContactMember 联系人，属于某一组

2. 原型

使用者只需要实现这三个接口，下面代码展示如何快速构建一个原型：

GroupRepositoryImpl

public class GroupRepositoryImpl implements GroupRepository {

  private List groups;

  public GroupRepositoryImpl() {

    this.groups = new ArrayList<>();

    Group group1 = new GroupImpl("局领导");

    group1.addMembers(new ContactMemberImpl("张良勖", "87463739"), new ContactMemberImpl("李存浩", "76353674"));

    Group group2 = new GroupImpl("办公室");

    group2.addMembers(new ContactMemberImpl("张良勖", "87463739"),   new ContactMemberImpl("李存浩", "76353674"));

    groups.add(group1);

    groups.add(group2);

  }

  @Override

  public Group getGroup(int groupPosition) {

    return groups.get(groupPosition);

  }

  @Override

  public List getGroups() {

    return groups;

  }

}

GroupImpl

public class GroupImpl implements Group {
    private final String name;
    private List members;

    public GroupImpl(String groupName) {
        this.name = groupName;
        members = new ArrayList<>();
    }

    @Override
    public String name() {
        return name;
    }

    @Override
    public ContactMember member(int index) {
        return index < members.size() ? members.get(index) : null;
    }

    @Override
    public void addMembers(ContactMember member, ContactMember... newMembers) {
        members.add(member);
        for (ContactMember mem : newMembers) {
            members.add(mem);
        }
    }

    @Override
    public int memberCount() {
        return members.size();
    }
}

ContactMemberImpl

public class ContactMemberImpl implements ContactMember {
    private final String name;
    private final String phone;

    public ContactMemberImpl(String name, String phone) {
        this.name = name;
        this.phone = phone;
    }

    @Override
    public String name() {
        return name;
    }

    @Override
    public String phone() {
        return phone;
    }
}

调用示例

public class MainActivity extends Activity {
    private TreeView treeView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();
    }

    private void initView() {
        treeView = (TreeView) findViewById(R.id.tree_view);
        treeView.setHeaderView(getLayoutInflater().inflate(R.layout.list_head_view, treeView,
                false));
        GroupRepository groupRepository = new GroupRepositoryImpl();
        treeView.setAdapter(new DefaultTreeViewAdapter(this, treeView, groupRepository));
    }
    
}

原型效果

效果图

3. 产品

未完待续