微信小程序有没有想Android里面的listview的组件？如果有，给出使用示例代码

微信小程序有一个类似于 Android 里 ListView 的组件叫做 "scroll-view"。

以下是一个简单的使用示例：

<scroll-view scroll-y="true">
  <view wx:for="{{items}}" wx:key="index">
    <text>{{item}}</text>
  </view>
</scroll-view>

JavaScript:

Page({
  data: {
    items: ['item1', 'item2', 'item3']
  }
})

在这个例子中，"scroll-view" 组件被用来滚动包含一些文本的视图。"wx:for" 属性用来循环渲染 "view" 组件，"wx:key" 属性用来设置 "view" 组件的唯一标识。

这只是一个简单的例子，在实际开发中，你可以使用其他组件、样式和交互来完善你的列表。

相关问题

android 好友功能,Android中使用ListView模拟微信好友功能代码

好的，以下是一个简单的Android使用ListView模拟微信好友功能的代码示例：

Friend.java（好友数据模型类）：

public class Friend {
    private int avatarId;
    private String nickname;
    private String remark;

    public Friend(int avatarId, String nickname, String remark) {
        this.avatarId = avatarId;
        this.nickname = nickname;
        this.remark = remark;
    }

    public int getAvatarId() {
        return avatarId;
    }

    public void setAvatarId(int avatarId) {
        this.avatarId = avatarId;
    }

    public String getNickname() {
        return nickname;
    }

    public void setNickname(String nickname) {
        this.nickname = nickname;
    }

    public String getRemark() {
        return remark;
    }

    public void setRemark(String remark) {
        this.remark = remark;
    }
}

friend_item.xml（好友列表项布局文件）：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="80dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:paddingTop="8dp"
    android:paddingBottom="8dp"
    android:background="@android:color/white">

    <ImageView
        android:id="@+id/avatar"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:layout_alignParentLeft="true"/>

    <TextView
        android:id="@+id/nickname"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:textColor="@android:color/black"
        android:layout_toRightOf="@+id/avatar"
        android:layout_marginLeft="16dp"
        android:layout_centerVertical="true"/>

    <TextView
        android:id="@+id/remark"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="14sp"
        android:textColor="@android:color/darker_gray"
        android:layout_toRightOf="@+id/avatar"
        android:layout_below="@+id/nickname"
        android:layout_marginLeft="16dp"/>

</RelativeLayout>

FriendAdapter.java（好友列表适配器）：

public class FriendAdapter extends BaseAdapter implements SectionIndexer {
    private List<Friend> friendList;
    private Context context;
    private LayoutInflater inflater;

    public FriendAdapter(List<Friend> friendList, Context context) {
        this.friendList = friendList;
        this.context = context;
        inflater = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {
        return friendList.size();
    }

    @Override
    public Object getItem(int position) {
        return friendList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = inflater.inflate(R.layout.friend_item, parent, false);
            holder = new ViewHolder();
            holder.avatar = convertView.findViewById(R.id.avatar);
            holder.nickname = convertView.findViewById(R.id.nickname);
            holder.remark = convertView.findViewById(R.id.remark);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        Friend friend = friendList.get(position);
        holder.avatar.setImageResource(friend.getAvatarId());
        holder.nickname.setText(friend.getNickname());
        holder.remark.setText(friend.getRemark());

        return convertView;
    }

    @Override
    public Object[] getSections() {
        return new Object[0];
    }

    @Override
    public int getPositionForSection(int sectionIndex) {
        for (int i = 0; i < getCount(); i++) {
            String nickname = friendList.get(i).getNickname();
            String firstLetter = String.valueOf(nickname.charAt(0)).toUpperCase();
            if (firstLetter.charAt(0) == sectionIndex) {
                return i;
            }
        }
        return -1;
    }

    @Override
    public int getSectionForPosition(int position) {
        String nickname = friendList.get(position).getNickname();
        String firstLetter = String.valueOf(nickname.charAt(0)).toUpperCase();
        return firstLetter.charAt(0);
    }

    private static class ViewHolder {
        ImageView avatar;
        TextView nickname;
        TextView remark;
    }
}

MainActivity.java（主界面代码）：

public class MainActivity extends AppCompatActivity implements TextWatcher {
    private EditText searchBox;
    private ListView friendListView;
    private FriendAdapter friendAdapter;
    private List<Friend> friendList;
    private List<Friend> filteredFriendList;

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

        searchBox = findViewById(R.id.search_box);
        friendListView = findViewById(R.id.friend_list);

        friendList = new ArrayList<>();
        friendList.add(new Friend(R.drawable.avatar1, "张三", "三哥"));
        friendList.add(new Friend(R.drawable.avatar2, "李四", "四哥"));
        friendList.add(new Friend(R.drawable.avatar3, "王五", "五哥"));
        friendList.add(new Friend(R.drawable.avatar4, "赵六", "六哥"));
        friendList.add(new Friend(R.drawable.avatar5, "钱七", "七哥"));
        friendList.add(new Friend(R.drawable.avatar6, "孙八", "八哥"));
        friendList.add(new Friend(R.drawable.avatar7, "周九", "九哥"));
        friendList.add(new Friend(R.drawable.avatar8, "吴十", "十哥"));

        friendAdapter = new FriendAdapter(friendList, this);
        friendListView.setAdapter(friendAdapter);

        searchBox.addTextChangedListener(this);
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        filteredFriendList = new ArrayList<>();
        for (Friend friend : friendList) {
            if (friend.getNickname().contains(s)) {
                filteredFriendList.add(friend);
            }
        }
        friendAdapter = new FriendAdapter(filteredFriendList, this);
        friendListView.setAdapter(friendAdapter);
    }

    @Override
    public void afterTextChanged(Editable s) {

    }
}

以上代码仅供参考，具体实现还需要根据需要进行调整。

Android使用ListView实现通讯录并能拨号的代码和布局示例

以下是一个简单的Android ListView实现通讯录并能拨号的代码示例：

布局文件main_activity.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>

通讯录列表项布局文件list_item_contact.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="16dp">

    <TextView
        android:id="@+id/contactName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Contact Name"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/contactPhone"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/contactName"
        android:text="Contact Phone"
        android:textSize="16sp" />

    <Button
        android:id="@+id/callButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_centerVertical="true"
        android:text="Call" />

</RelativeLayout>

Activity代码:

public class MainActivity extends AppCompatActivity {

    private ListView listView;
    private List<Contact> contacts;
    private ContactListAdapter adapter;

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

        listView = findViewById(R.id.listView);

        // 初始化联系人列表
        contacts = new ArrayList<>();
        contacts.add(new Contact("John", "123456789"));
        contacts.add(new Contact("David", "987654321"));
        contacts.add(new Contact("Mary", "555555555"));

        adapter = new ContactListAdapter(this, contacts);
        listView.setAdapter(adapter);
    }

    private class ContactListAdapter extends ArrayAdapter<Contact> {

        public ContactListAdapter(Context context, List<Contact> contacts) {
            super(context, 0, contacts);
        }

        @NonNull
        @Override
        public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
            if (convertView == null) {
                convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_item_contact, parent, false);
            }

            // 获取联系人数据
            final Contact contact = getItem(position);

            // 显示联系人名字和电话号码
            TextView contactName = convertView.findViewById(R.id.contactName);
            contactName.setText(contact.getName());

            TextView contactPhone = convertView.findViewById(R.id.contactPhone);
            contactPhone.setText(contact.getPhone());

            // 设置拨号按钮的点击事件
            Button callButton = convertView.findViewById(R.id.callButton);
            callButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    // 拨打电话
                    Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + contact.getPhone()));
                    startActivity(intent);
                }
            });

            return convertView;
        }
    }

    private class Contact {
        private String name;
        private String phone;

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

        public String getName() {
            return name;
        }

        public String getPhone() {
            return phone;
        }
    }
}

这个示例中，我们创建了一个名为Contact的简单数据模型，并使用一个包含联系人名字和电话号码的布局文件来显示每个联系人的信息。我们还在适配器中添加了一个拨号按钮的点击事件，以便用户能够拨打所选联系人的电话号码。