Question

任何人都可以告诉我以下问题的解决方案。我创建了简单的聊天应用程序，其中我想使用片段打开多个聊天窗口。我已经完成了这个，但现在的问题是我无法分离聊天片段，所有这些都会相互重叠。请建议我解决方案，以便我可以使用最小化和最大化按钮分离这些片段。如果你提供代码片段对我有用，因为我是adroid developpement的新手。

谢谢＆amp; ragards， Anand Jagtap。

我已经完成了使用标签监听器并将聊天记录存储在静态变量中。

/// <summary>
/// Listener that handles the selection of a tab in the user interface
/// </summary>
/// <typeparam name="T"></typeparam>
public class TabListener<T> : Java.Lang.Object, ActionBar.ITabListener
    where T : Fragment
{
    private T _fragment;

    /// <summary>
    /// Initializes a new instance of the tab listener
    /// </summary>
    /// <param name="fragment"></param>
    public TabListener(T fragment)
    {
        _fragment = fragment;
    }

    /// <summary>
    /// Handles the reselection of the tab
    /// </summary>
    /// <param name="tab"></param>
    /// <param name="ft"></param>
    public void OnTabReselected(ActionBar.Tab tab, FragmentTransaction ft)
    {

    }

    /// <summary>
    /// Adds the fragment when the tab was selected
    /// </summary>
    /// <param name="tab"></param>
    /// <param name="ft"></param>
    public void OnTabSelected(ActionBar.Tab tab, FragmentTransaction ft)
    {
        Fragment fragment = null;
        if (tab.Text == "Users")
        {
            fragment = Global.UserFragment;
        }
        else
        {
            fragment = Global.ChatWindows.FirstOrDefault(chat => chat.User.Name == tab.Text);
            tab.SetIcon(Resource.Drawable.message);
        }

        Global.CurrentFragment = fragment;
        FragmentManager fm = Global.QActivity.FragmentManager;
        fm.BeginTransaction().Add(Resource.Id.Frame_container, fragment, tab.Text).Commit();
    }

    /// <summary>
    /// Removes the fragment when the tab was deselected
    /// </summary>
    /// <param name="tab"></param>
    /// <param name="ft"></param>
    public void OnTabUnselected(ActionBar.Tab tab, FragmentTransaction ft)
    {
        Fragment fragment = null;
        if (tab.Text == "Users")
        {
            fragment = Global.UserFragment;
        }
        else
        {
            fragment = Global.ChatWindows.FirstOrDefault(chat => chat.User.Name == tab.Text);
            tab.SetIcon(Resource.Drawable.QChatOffline);
        }

        FragmentManager fm = Global.QActivity.FragmentManager;
        fm.BeginTransaction().Remove(fragment).Commit();
    }
}

private void StartChat（string userName，bool selectedFromList） { 尝试 { 用户user = GetUserByName（userName）; ChatFragment chatFragment = Global.ChatWindows.Find（chatWindow =＆gt; chatWindow.User.Name == user.Name）; var ft = this.activity.FragmentManager.BeginTransaction（）; if（chatFragment == null） { chatFragment = new ChatFragment（）; chatFragment.User = user; chatFragment.CurrentUser = Global.Host.Username;

                var chatTab = this.activity.ActionBar.NewTab();
                chatFragment.TabListener = new TabListener<ChatFragment>(chatFragment);
                chatTab.SetTabListener(chatFragment.TabListener);
                chatTab.SetIcon(Resource.Drawable.message);
                chatTab.SetText(userName);
                // Add the new tab to the action bar
                this.activity.ActionBar.AddTab(chatTab);
                ft.Add(Resource.Id.Frame_container, chatFragment, user.Name);
                Global.ChatWindows.Add(chatFragment);

                this.activity.ActionBar.SelectTab(chatTab);

                Global.CurrentFragment = chatFragment;
                ft.Commit();
            }
            else
            {
                int index = Global.ChatWindows.FindIndex(chat => chat.User.Name == chatFragment.User.Name);
                ActionBar.Tab tab = this.activity.ActionBar.GetTabAt(index + 1);
                tab.SetIcon(Resource.Drawable.message);
                if (selectedFromList)
                {
                    ft.Remove(chatFragment);
                    ft.Commit();
                    Global.CurrentFragment = chatFragment;

                    try
                    {
                        var fragmentTransaction = this.activity.FragmentManager.BeginTransaction();
                        this.activity.ActionBar.SelectTab(tab);
                        fragmentTransaction.Commit();
                    }
                    catch (Exception ex)
                    {

                    }
                }
                else
                {
                    ft.Remove(chatFragment);
                    ft.Add(Resource.Id.Frame_container, chatFragment, user.Name);
                    ft.Commit();
                }
            }

            chatFragment.ChatHistory.Add(new ChatHistory()
            {
                FirstPartColor = Android.Graphics.Color.Red,
                FirstPartMessage = DateTime.Now.ToString("HH:mm:ss"),
                SecondPartMessage = String.Format(" {0} is {1}.", user.Name, m_chatWindowManager.GetStatusText(user.Status).Replace("%@RN@%", "\r\n" + "\r\n")),
                SecondPartColor = Android.Graphics.Color.Red
            });

            Global.ChatStarted = true;
        }
        catch (Exception exception)
        {
            ((QChatActivity)this.activity).ShowMessage("Failed StartChat(string userName) for user " + userName + " Exception : " + exception.Message + exception.StackTrace);
        }
    }

Answer 1

在Android中，不支持最小化或最大化屏幕，而是可以将警报框设置为在单独窗口中聊天的活动。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center"
    android:background="@android:color/white"
    android:orientation="vertical" android:padding="20dp">

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical"
        android:padding="5dp" >

        <TextView
            android:id="@+id/welcomeToIM"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_above="@+id/scrollView1"
            android:textColor="#000000"
            android:textSize="14dp" />
    </LinearLayout>

    <ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_above="@+id/edittext1"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="5dp"
        android:layout_marginTop="25dp"
        android:background="@android:drawable/editbox_background_normal" >

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:orientation="vertical"
            android:padding="5dp" >

            <TextView
                android:id="@+id/textMsg"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:textColor="#000000"
                android:textSize="14dp" />
        </LinearLayout>
    </ScrollView>

    <Button
        android:id="@+id/btn2"
        android:layout_width="150dp"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:background="@android:drawable/editbox_background_normal"
        android:text="Contacts"
        android:textColor="#000000" />

    <Button
        android:id="@+id/btn1"
        android:layout_width="150dp"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:background="@android:drawable/editbox_background_normal"
        android:text="Send"
        android:textColor="#000000" />

    <EditText
        android:id="@+id/edittext1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/btn2"
        android:layout_alignParentLeft="true"
        android:background="@android:drawable/editbox_background_normal"
        android:ems="10"
        android:hint="Type a Message"
        android:maxLines="5"
        android:textColor="#000000" >

        <requestFocus />
    </EditText>

</RelativeLayout>

片段重叠，需要解决方案以最大化和最小化片段

1 个答案: