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當用戶單擊操作欄中的項目時,我試圖向活動添加片段,但無法顯示它。這裏是不工作我所期望的方式主要代碼(這是正在寫在MonoDroid的):在初始佈局設置未顯示後向活動添加片段
public override bool OnOptionsItemSelected(IMenuItem item)
{
if (item.ItemId == Resource.Id.show_hide_notes)
{
notesLayout.Visibility = ViewStates.Visible;
notesWebViewFragment = new NotesWebViewFragment();
// linearLayout.LayoutParameters = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FillParent, LinearLayout.LayoutParams.WrapContent, 1);
Android.Support.V4.App.FragmentTransaction fragmentTransaction = SupportFragmentManager.BeginTransaction();
fragmentTransaction.Add(Resource.Id.notes_fragment_container, notesWebViewFragment);
fragmentTransaction.Commit();
// Adding this line doesn't help
// FindViewById<LinearLayout>(Resource.Id.plex_frame_container).Invalidate();
}
return true;
}
當我添加此片段與在OnCreate方法的另一個片段我得到了我的期望。我嘗試了幾種不同的方法來嘗試並顯示。任何解釋我做錯了將不勝感激。我已經添加了下面其餘的相關代碼。
[Activity]
public class BrainViewActivity : Android.Support.V4.App.FragmentActivity
{
private Brain activeBrain;
PlexWebViewFragment plexWebViewFragment;
NotesWebViewFragment notesWebViewFragment;
FrameLayout notesLayout;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.brain_view);
notesLayout = FindViewById<FrameLayout>(Resource.Id.notes_fragment_container);
// notesLinearLayout.LayoutParameters = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FillParent, LinearLayout.LayoutParams.WrapContent, 0);
notesLayout.Visibility = ViewStates.Gone;
if (savedInstanceState == null)
{
// Create an instance of PlexWebViewFragment
plexWebViewFragment = new PlexWebViewFragment();
}
// Check that the activity is using the layout version with
// the fragment_container FrameLayout
if (FindViewById(Resource.Id.plex_fragment_container) != null)
{
plexWebViewFragment.Arguments = Intent.Extras;
Android.Support.V4.App.FragmentTransaction fragmentTransaction = SupportFragmentManager.BeginTransaction();
fragmentTransaction.Add(Resource.Id.plex_fragment_container, plexWebViewFragment);
fragmentTransaction.Commit();
}
}
public override bool OnCreateOptionsMenu(IMenu menu)
{
base.OnCreateOptionsMenu(menu);
MenuInflater.Inflate(Resource.Menu.brain_view_menu, menu);
return true;
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
if (item.ItemId == Resource.Id.show_hide_notes)
{
notesLayout.Visibility = ViewStates.Visible;
notesWebViewFragment = new NotesWebViewFragment();
// linearLayout.LayoutParameters = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FillParent, LinearLayout.LayoutParams.WrapContent, 1);
Android.Support.V4.App.FragmentTransaction fragmentTransaction = SupportFragmentManager.BeginTransaction();
fragmentTransaction.Add(Resource.Id.notes_fragment_container, notesWebViewFragment);
fragmentTransaction.Commit();
// Adding this line doesn't help
// FindViewById<LinearLayout>(Resource.Id.plex_frame_container).Invalidate();
}
return true;
}
}
XML視圖:
<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/plex_frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:id="@+id/plex_fragment_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<FrameLayout
android:id="@+id/notes_fragment_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"/>
</LinearLayout>
當我再次嘗試以後添加活動的觀點從未改變,以顯示片段這個作品,如果我加入片段馬上,否則。幾乎就像我需要告訴重新繪製的活動?任何幫助,將不勝感激。提前致謝。