I'm trying to implement this code here in my project:
The differences are that instead of a ScrollView I'm using a RecyclerView and that instead of having my RecyclerView directly in the Activity I have inside a fragment that sets the listener I need.
The problem is that while the OnScrollChanged(int l, int t, int oldl, int oldt) gets actually called everytime I scroll, the parameters it obtains are always 0 and I don't understand why, so ScrollChangedTarget doesn't work as intended.
This is the custom RecyclerView:
public class NotifyingScrollRecyclerView : RecyclerView
{
private Activity activity;
private View headerView;
private View footerView;
public delegate void ScrollChangedHandler(int l, int t, int oldl, int oldt, EventArgs e);
public event ScrollChangedHandler scrollChanged;
public EventArgs e = null;
//Enabling all required constructors
public NotifyingScrollRecyclerView(Context context) : base(context)
{
}
public NotifyingScrollRecyclerView(Context context, IAttributeSet attrs) : base(context, attrs)
{
}
public NotifyingScrollRecyclerView(IntPtr ptr, JniHandleOwnership ownership) : base(ptr, ownership)
{
}
public NotifyingScrollRecyclerView(Context context, IAttributeSet attrs, int defStyle) : base(context, attrs, defStyle)
{
}
//This method attribute allows us to register the inbuilt OnScrollChanged event that fires when scrolling a ScrollView
[Android.Runtime.Register("onScrollChanged", "(IIII)V", "GetOnScrollChanged_IIIIHandler")]
protected override void OnScrollChanged(int l, int t, int oldl, int oldt)
{
base.OnScrollChanged(l, t, oldl, oldt);
scrollChanged(l, t, oldl, oldt, e);
}
}
//Set an event listener
public class ScrollViewChangedListener
{
private Activity activity;
private NotifyingScrollRecyclerView scrollView;
private Android.Support.V7.App.ActionBar actionBar;
private Drawable actionBarDrawable;
be changed
public ScrollViewChangedListener(Activity a, NotifyingScrollRecyclerView n)
{
n.scrollChanged += ScrollChangedTarget;
this.activity = a;
this.scrollView = n;
this.actionBar = ((UserPageActivity)a).SupportActionBar;
this.actionBarDrawable = a.GetDrawable(Resource.Drawable.actionbar_background);
this.actionBarDrawable.SetAlpha(0);
}
//Handle the changing of the scroll
public void ScrollChangedTarget(int l, int t, int oldl, int oldt, EventArgs e)
{
//You set the View you want to be your header as a header height, and then get it's height
int headerHeight = activity.FindViewById<ImageView>(Resource.Id.profilebanner).Height -
this.actionBar.Height;
float ratio = (float)Math.Min(Math.Max(t, 0), headerHeight) / headerHeight;
int newAlpha = (int)(ratio * 255);
this.actionBarDrawable.SetAlpha(newAlpha);
this.actionBar.SetBackgroundDrawable(this.actionBarDrawable);
}
}
This is the Activity which calls the fragment (it doesn't do anything in particular aside calling the fragment in this case):
[Activity(Label = "UserPageActivity")]
public class UserPageActivity : BaseActivity
{
protected override int LayoutResource => Resource.Layout.activity_user_page;
UserViewModel viewModel;
TextView username;
TextView usernameToolbar;
Button followButton;
ViewPager pager;
UserTabsAdapter adapter;
bool IsLoggedUser;
protected override void OnCreate(Bundle savedInstanceState)
{
IsLoggedUser = Intent.GetStringExtra("userId").Equals(LoginController.GetInstance().CurrentUser.Email);
base.OnCreate(savedInstanceState);
viewModel = new UserViewModel();
viewModel.UserLoaded += new UserViewModel.UserLoadedHandler(OnUserLoaded);
viewModel.LoadUserCommand.Execute(Intent.GetStringExtra("userId"));
username = FindViewById<TextView>(Resource.Id.profilename);
usernameToolbar = FindViewById<TextView>(Resource.Id.usernamePage);
followButton = FindViewById<Button>(Resource.Id.followButton);
username.Text = Intent.GetStringExtra("username");
usernameToolbar.Text = Intent.GetStringExtra("username");
adapter = new UserTabsAdapter(this, SupportFragmentManager);
pager = FindViewById<ViewPager>(Resource.Id.user_viewpager);
var tabs = FindViewById<TabLayout>(Resource.Id.tabs);
pager.Adapter = adapter;
tabs.SetupWithViewPager(pager);
pager.OffscreenPageLimit = 5;
pager.PageSelected += (sender, args) =>
{
var fragment = adapter.InstantiateItem(pager, args.Position) as IFragmentVisible;
fragment?.BecameVisible();
};
}
private void OnUserLoaded(bool loaded)
{
}
protected override void OnStart()
{
base.OnStart();
if (IsLoggedUser)
{
followButton.Visibility = ViewStates.Gone;
}
else
{
bool following;
if (LoginController.GetInstance().CurrentUser.FollowsUsers.ContainsKey(Intent.GetStringExtra("userId")))
{
followButton.Text = "Unfollow";
following = true;
}
else
{
followButton.Text = "Follow";
following = false;
}
followButton.Click += (object sender, EventArgs e) =>
{
followButton.Enabled = false;
if (following)
{
UserService service = ServiceLocator.Instance.Get<UserService>();
service.SetUser(LoginController.GetInstance().CurrentUser);
service.RemoveFollowsUserCommand.Execute(viewModel.LoadedUser.Email);
service.SetUser(viewModel.LoadedUser);
service.RemoveFollowedByUserCommand.Execute(LoginController.GetInstance().CurrentUser.Email);
followButton.Text = "Follow";
following = false;
}
else
{
UserService service = ServiceLocator.Instance.Get<UserService>();
service.SetUser(LoginController.GetInstance().CurrentUser);
service.AddFollowsUserCommand.Execute(viewModel.LoadedUser);
service.SetUser(viewModel.LoadedUser);
service.AddFollowedByUserCommand.Execute(LoginController.GetInstance().CurrentUser);
followButton.Text = "Unfollow";
following = true;
}
followButton.Enabled = true;
};
}
}
}
class UserTabsAdapter : FragmentStatePagerAdapter
{
string[] titles;
public override int Count => titles.Length;
public UserTabsAdapter(Context context, Android.Support.V4.App.FragmentManager fm) : base(fm)
{
titles = context.Resources.GetTextArray(Resource.Array.user_sections);
}
public override Java.Lang.ICharSequence GetPageTitleFormatted(int position) =>
new Java.Lang.String(titles[position]);
public override Android.Support.V4.App.Fragment GetItem(int position)
{
switch (position)
{
case 0: return UserContestsFragment.NewInstance();
case 1: return UserPartecipationsFragment.NewInstance();
case 2: return GlobalContestFragment.NewInstance();
case 3: return MessagesFragment.NewInstance();
}
return null;
}
public override int GetItemPosition(Java.Lang.Object frag) => PositionNone;
}
This is the fragment which setups the listener for the recyclerview:
public class UserContestsFragment : AbstractRefresherFadingToolbarFragment<Contest>
{
public static UserContestsFragment NewInstance() =>
new UserContestsFragment { Arguments = new Bundle() };
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
}
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
ContestViewModel viewModel = new ContestViewModel();
base.ViewModel = viewModel;
base.LoadItemsCommand = viewModel.LoadAllByCreatorUserCommand;
base.param = Activity.Intent.GetStringExtra("userId");
base.adapter = new ContestsAdapter(Activity, viewModel);
var view = base.OnCreateView(inflater, container, savedInstanceState);
ScrollViewChangedListener listener = new ScrollViewChangedListener(Activity, recyclerView);
return view;
}
And this is the abstract fragment needed by that fragment which is in charge of setting up the layout:
public abstract class AbstractRefresherFadingToolbarFragment<T> : Android.Support.V4.App.Fragment, IFragmentVisible
{
public ICollectionViewModel<T> ViewModel;
public ICommand LoadItemsCommand;
public object param; //parametro per il LoadItemsCommand
public ItemsAdapter<T> adapter;
public SwipeRefreshLayout refresher;
public ProgressBar progress;
public NotifyingScrollRecyclerView recyclerView;
//LruCache cache = new LruCache((int)(Runtime.GetRuntime().MaxMemory() / 4));
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
}
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.Inflate(Resource.Layout.fragment_fading_toolbar, container, false);
recyclerView = view.FindViewById<NotifyingScrollRecyclerView>(Resource.Id.recyclerView);
//ScrollViewChangedListener listener = new ScrollViewChangedListener((UserPageActivity)Activity, recyclerView);
//adapter.cache = cache;
recyclerView.HasFixedSize = true;
recyclerView.SetAdapter(adapter);
recyclerView.SetItemViewCacheSize(4);
//recyclerView.ChildViewAttachedToWindow += new EventHandler<RecyclerView.ChildViewAttachedToWindowEventArgs>(OnChildViewAttached);
//recyclerView.ChildViewDetachedFromWindow += new EventHandler<RecyclerView.ChildViewDetachedFromWindowEventArgs>(OnChildViewDetached);
refresher = view.FindViewById<SwipeRefreshLayout>(Resource.Id.refresher);
refresher.SetColorSchemeColors(Resource.Color.accent);
progress = view.FindViewById<ProgressBar>(Resource.Id.progressbar_loading);
progress.Visibility = ViewStates.Gone;
return view;
}
}
I didn't read your entire code but I looked at the site you linked in your question. The functionality of the hidden action bar you want to use is handled by CollapsingToolbarLayout in the support library. To know how to use it, go to Cheesesquare. It is a complete example of the support library widgets and can be built and run without any changes.
Edit:
RecyclerView has a method named AddOnScrollListener. Use it instead of the OnScrollChanged. If you use an inherited class from RecyclerView, you can call it in all of the constructors of that class.
Related
I have tried to look out for an answer to the behavior of my views but I seem not find any question or solution related to it. My recycler views seemed to be set up well. I just realized that my app is not responding in the right way to the OnClickListeners.
I have set up toasts in my adapter for the recycler view click events. When i have 10 views. When i click on a view, it gives a text of another view. It seems it randomly gives me the text of another view amongst the 9 remaining views. What could be the cause of this?
Activity
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
FrameLayout content = (FrameLayout)FindViewById(Resource.Id.content_frame);
LayoutInflater.Inflate(Resource.Layout.Main, content);
setUpRecyclerView();
}
public void setUpRecyclerView(){
rv = FindViewById<RecyclerView>(Resource.Id.recyclerView);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.Orientation = LinearLayoutManager.Vertical;
layoutManager.ReverseLayout = true;
layoutManager.StackFromEnd = true;
rv.HasFixedSize = true;
rv.SetLayoutManager(layoutManager);
}
Adapter
public class FeedViewHolder : RecyclerView.ViewHolder, View.IOnClickListener, View.IOnLongClickListener
{
public FeedViewHolder(View itemView):base(itemView)
{
//binding of variables here
itemView.SetOnClickListener(this);
itemView.SetOnLongClickListener(this);
}
public void OnClick(View v)
{
itemClickListener.OnClick(v, AdapterPosition, false);
}
public bool OnLongClick(View v)
{
itemClickListener.OnClick(v, AdapterPosition, true);
return true;
}
public class FeedAdapter : RecyclerView.Adapter, ItemClickListener
{
public FeedAdapter(RssObject rssObject, Context mContext)
{
this.mContext = mContext;
this.inflater = LayoutInflater.From(mContext);
activity = (MainActivity)mContext;
}
public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
{
hold = holder as FeedViewHolder;
//binding
hold.itemClickListener = this;
}
public void OnClick(View view, int position, bool isLongClick)
{
Toast.MakeText(activity, "Main text : " + hold.txtContent.Text, ToastLength.Long).Show();
}
public override int ItemCount
{
get { return rssObject.items.Count; }
}
}
}
}
I have my fragments inside view page but I would like to reload the data on the tab selected.I tried returning PositionNone in the GetItemPosition method in my FragmentPagerAdapter but it does not work.
I tried adding notifyDataSetChanged(); on tab selected but it throws nullpointer exception.
I even tried setting the viewPager.setOffscreenPageLimit
I managed to find the link :
Replace Fragment inside a ViewPager
but it is on java.
I have managed to convert most of the code to c# but gets stuck on the commented code. I am not sure how to call the listener and instantiate the class at the same time? There is a lot of similar question but unfortunately not one in Xamarin Android.
I need to do this in xamarin android. Any help will be greatly appreciated.
This is my FragmentAdapter
public class TabsFragmentPagerAdapter : FragmentPagerAdapter
{
private readonly Android.Support.V4.App.Fragment[] fragments;
static readonly int NUM_ITEMS = 2;
private readonly Android.Support.V4.App.FragmentManager FragmentManager;
private Android.Support.V4.App.Fragment mFragmentAtPos0;
private readonly ICharSequence[] titles;
public TabsFragmentPagerAdapter(Android.Support.V4.App.FragmentManager fm, Android.Support.V4.App.Fragment[] fragments, ICharSequence[] titles) : base(fm)
{
this.fragments = fragments;
this.titles = titles;
}
public override int Count
{
get
{
return fragments.Length;
}
}
public override int GetItemPosition(Java.Lang.Object objectValue)
{
if (objectValue.GetType() == typeof(startJobFrag) && mFragmentAtPos0.GetType() == typeof(jobCaptureFrag))
{
return PositionNone;
}
return PositionUnchanged;
}
public override ICharSequence GetPageTitleFormatted(int position)
{
return titles[position];
}
public override Android.Support.V4.App.Fragment GetItem(int position)
{
if (position == 0)
{
if (mFragmentAtPos0 == null)
{
//not working
}
return mFragmentAtPos0;
}
else
{
return new jobCaptureFrag();
}
}
This is my Actvity
void FnInitTabLayout()
{
var fragments = new Android.Support.V4.App.Fragment[]
{
new frag 1(),
new frag 2(),
new frag 3(),
};
//Tab title array
var titles = CharSequence.ArrayFromStringArray(new[] {
"Page 1",
"Page 2",
"Page 3",
});
var viewPager = FindViewById<ViewPager>(Resource.Id.viewpager);
//viewpager holding fragment array and tab title text
//viewPager.
viewPager.Adapter = new TabsFragmentPagerAdapter(SupportFragmentManager, fragments, titles);
// Give the TabLayout the ViewPager
tabLayout.SetupWithViewPager(viewPager);
viewPager.PageSelected += (object sender, ViewPager.PageSelectedEventArgs e) =>
{
//FnInitTabLayout();
if(e.Position == 0)
{
//handle tab click/selected
}
};
}
public interface FirstPageFragmentListener
{
void onSwitchToNextFragment();
}
Fragment
public class Fragment1: Android.Support.V4.App.Fragment
{
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your fragment here
}
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
// Use this to return your custom view for this Fragment
// return inflater.Inflate(Resource.Layout.YourFragment, container, false);
View view = inflater.Inflate(Resource.Layout.myview, container, false);
}
}
I managed to solve it on my own.
In My activity I called NotifyDataSetChanged() on Pageselected event
Activity
ViewPager.PageSelected += (object sender, ViewPager.PageSelectedEventArgs e) =>
{
if (e.Position == 1)
{
_pager.Adapter.NotifyDataSetChanged();
}
};
Then I changed my Adapter from FragmentPagerAdapter to FragmentStatePagerAdapter and override the GetItemPosition.
Adapter
public class TabsFragmentPagerAdapter : FragmentStatePagerAdapter
{
public override int GetItemPosition(Java.Lang.Object objectValue)
{
return PositionNone;
}
}
Refresh a specific tab - inside the Adapter
public override Android.Support.V4.App.Fragment GetItem(int position)
{
if(position == 1) //second tab selected
{
NotifyDataSetChanged();
}
return fragments[position];
}
I'm sure there's a better way to do it but this works.
I just Created ViewPager With PagerAdapter and I put inside it 3 items but when i run the program ViewPager.ChildCount give me 2 ?
and when i scroll to second View the adapter add the third item and give me 3 count but when I scroll to the final View (3) it give me 2 in the count , but at this time the last 2 items !!
in my code I'm Trying to display the position in the textView inside the layout
it give my right numbers in the first scroll then it start mix position randomly
I DON'T KNOW WHY ?? PLEASE HELP
I Am Using Xamarin
and there is my code
public class SlidingTabsFragment : Fragment
{
private SlidingTabScrollView mSlidingTabScrollView;
private ViewPager mViewPager;
protected static View CurrentView;
protected static int CurrentViewPosition;
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
return inflater.Inflate(Resource.Layout.fragment_sample, container, false);
}
public override void OnViewCreated(View view, Bundle savedInstanceState)
{
mSlidingTabScrollView = view.FindViewById<SlidingTabScrollView>(Resource.Id.sliding_tabs);
mViewPager = view.FindViewById<ViewPager>(Resource.Id.viewpager);
mViewPager.Adapter = new SamplePagerAdapter();
mViewPager.PageSelected += MViewPager_PageSelected;
mViewPager.PageScrolled += MViewPager_PageScrolled;
mSlidingTabScrollView.ViewPager = mViewPager;
}
private void MViewPager_PageScrolled(object sender, ViewPager.PageScrolledEventArgs e)
{
if (e.Position < mViewPager.ChildCount && e.Position>=0)
{
SamplePagerAdapter ad = (SamplePagerAdapter)mViewPager.Adapter;
TextView txtTitle = mViewPager.GetChildAt(e.Position).FindViewById<TextView>(Resource.Id.item_title);
int pos = ad.GetItemPosition(CurrentView);
txtTitle.Text = e.Position.ToString();
}
}
private void MViewPager_PageSelected(object sender, ViewPager.PageSelectedEventArgs e)
{
if (e.Position < mViewPager.ChildCount && e.Position >= 0)
{
SamplePagerAdapter ad = (SamplePagerAdapter)mViewPager.Adapter;
TextView txtTitle = mViewPager.GetChildAt(e.Position).FindViewById<TextView>(Resource.Id.item_title);
txtTitle.Text = e.Position.ToString();
}
}
public class SamplePagerAdapter : PagerAdapter
{
List<string> items = new List<string>();
public override void SetPrimaryItem(ViewGroup container, int position, Java.Lang.Object obj)
{
CurrentView = (View)obj;
CurrentViewPosition = position;
}
public SamplePagerAdapter() : base()
{
items.Add("Home");
items.Add("Sell");
items.Add("Rent");
}
public override int Count
{
get { return items.Count; }
}
public override bool IsViewFromObject(View view, Java.Lang.Object obj)
{
return view == obj;
}
public override Java.Lang.Object InstantiateItem(ViewGroup container, int position)
{
View view = LayoutInflater.From(container.Context).Inflate(Resource.Layout.pager_item, container, false);
container.AddView(view);
return view;
}
public string GetHeaderTitle (int position)
{
return items[position];
}
public override void DestroyItem(ViewGroup container, int position, Java.Lang.Object obj)
{
container.RemoveView((View)obj);
}
}
I solve it , It was because I have to Set OffScreenLimit property
in my activity I have this:
public class MainActivity : Activity
{
RelativeLayout mRelativeLayout;
Button mButton;
private Button mBtnSignUp;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
mRelativeLayout = FindViewById<RelativeLayout>(Resource.Id.mainView);
mButton = FindViewById<Button>(Resource.Id.btnLogin);
mButton.Click += mButton_Click;
mRelativeLayout.Click += mRelativeLayout_Click;
mBtnSignUp = FindViewById<Button> (Resource.Id.button1);
mBtnSignUp.Click += (object sender, EventArgs e) =>
{
//Pull up dialog
FragmentTransaction transaction = FragmentManager.BeginTransaction();
dialog_SignUp signUpDialog = new dialog_SignUp();
signUpDialog.Show(transaction, "dialog fragment");
signUpDialog.mOnSignUpComplete += signUpDialog_mOnSignUpComplete;
};
void signUpDialog_mOnSignUpComplete (object sender, OnSignUpEventArgs e)
{
Thread thread = new Thread (ActLikeARequest);
thread.Start ();
}
private void ActLikeARequest()
{
Thread.Sleep (3000);
}
And in the dialog I have:
public class OnSignUpEventArgs : EventArgs
{
private string mFirstName;
private string mEmail;
private string mPassword;
public string FirstName
{
get{ return mFirstName; }
set{ mFirstName=value;}
}
public string Email
{
get{ return mEmail; }
set{ mEmail=value;}
}
public string Password
{
get{ return mPassword; }
set{ mPassword=value;}
}
public OnSignUpEventArgs (string firstName, string email, string password) : base()
{
FirstName = firstName;
Email = email;
Password = password;
}
}
class dialog_SignUp:DialogFragment
{
private Button mBtnSignUp;
private EditText mFirstName;
private EditText mEmail;
private EditText mPassword;
public event EventHandler<OnSignUpEventArgs> mOnSignUpComplete;
public override View OnCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
base.OnCreateView (inflater, container, savedInstanceState);
var view = inflater.Inflate (Resource.Layout.dialog_sign_up, container, false);
mBtnSignUp = view.FindViewById<Button> (Resource.Id.btnDialogEmail);
mFirstName = view.FindViewById<EditText> (Resource.Id.txtFirstName);
mEmail = view.FindViewById<EditText> (Resource.Id.txtEmail);
mPassword = view.FindViewById<EditText> (Resource.Id.txtPassword);
mBtnSignUp.Click += mBtnSignUp_Click;
return view;
}
void mBtnSignUp_Click (object sender, EventArgs e)
{
//User has clicked the sign up button
mOnSignUpComplete.Invoke (this, new OnSignUpEventArgs(mFirstName.Text, mEmail.Text, mPassword.Text));
this.Dismiss ();
}
public override void OnActivityCreated (Bundle savedInstanceState)
{
Dialog.Window.RequestFeature (WindowFeatures.NoTitle); //Sets the title bar to invisible
base.OnActivityCreated (savedInstanceState);
Dialog.Window.Attributes.WindowAnimations = Resource.Style.dialog_animation; //Set the animation
}
}
The question is, how can I pass data(strings) from the activity into the dialog, so that when it is called, the TextViews get the data I'm passing?
Is it something to add in the actitity, but what?
i think you need to be able to accept a parameter in your dialog_signup.
class dialog_SignUp:DialogFragment
{
private Button mBtnSignUp;
private EditText mFirstName;
private EditText mEmail;
private EditText mPassword;
String parameter="";
public event EventHandler<OnSignUpEventArgs> mOnSignUpComplete;
public dialog_SignUp(String parameterIn){
parameter=parameterIn;
}
public override View OnCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
base.OnCreateView (inflater, container, savedInstanceState);
var view = inflater.Inflate (Resource.Layout.dialog_sign_up, container, false);
mBtnSignUp = view.FindViewById<Button> (Resource.Id.btnDialogEmail);
mFirstName = view.FindViewById<EditText> (Resource.Id.txtFirstName);
mFirstName.setText(parameter);
mEmail = view.FindViewById<EditText> (Resource.Id.txtEmail);
mPassword = view.FindViewById<EditText> (Resource.Id.txtPassword);
mBtnSignUp.Click += mBtnSignUp_Click;
return view;
}
then replace dialog_SignUp signUpDialog = new dialog_SignUp(); with dialog_SignUp signUpDialog = new dialog_SignUp(stringToSend);
Keep in mind that you can always use The Application class to define a variable there.
namespace YourNamespace
{
[Application]
public class App : Application
{
public ParseObject currentBusiness { get; set;}
public App (IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
{
}
public override void OnCreate ()
{
base.OnCreate ();
currentBusiness = new ParseObject ("Business");
}
}
}
Then you can access it from evewhere in that way:
App _app = (App)Application.Context;
var curentBusiness = _app.currentBusiness;
You can use Property feature of Class.
Dialog Fragment Code
class Error : DialogFragment
{
public string getErrorMsg { get; set; } // this gets the message
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.Inflate(Resource.Layout.Error, container, false);
TextView text = view.FindViewById<TextView>(Resource.Id.txtError);
text.Text = getErrorMsg; //here the message is set to the TextView
return view;
}
}
Calling Method
FragmentTransaction transaction = FragmentManager.BeginTransaction();
Error obj = new Error();
obj.Cancelable = false;
obj.getErrorMsg = passMyString; // in this line you send message to The Class
obj.Show(transaction, "error");
Hi I want to add pull to refresh on my apps using this component PullToResharp, The project is great but im having problem adding custom listview in fragment, does anyone here done this before help me resolve it, thanks.
here is the code
fragment
namespace ListViewPullToRefresh.Fragments
{
public class SampleListFragment : SupportListFragment
{
private IPullToRefresharpView _ptrView;
private List<TableItem> _itemHeading = new List<TableItem>();
public SampleListFragment() : base()
{
}
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
return inflater.Inflate(Resource.Layout.nav, null, false);
}
public override void OnViewStateRestored(Bundle savedInstanceState)
{
base.OnViewStateRestored(savedInstanceState);
_itemHeading.Add(new TableItem(){Heading = "Ivan", Subheading = "Guinto"});
_itemHeading.Add(new TableItem(){Heading = "Jonathan", Subheading = "Guinto"});
_itemHeading.Add(new TableItem(){Heading = "Keneth", Subheading = "Guinto"});
if (_ptrView == null && ListView is IPullToRefresharpView)
{
_ptrView = (IPullToRefresharpView)ListView;
_ptrView.RefreshActivated += ptr_view_RefreshActivated;
}
ListView.Adapter = new HomeScreenAdapter(this, _itemHeading);
}
private void ptr_view_RefreshActivated(object sender, EventArgs e)
{
View.PostDelayed(() =>
{
if (_ptrView != null)
{
_ptrView.OnRefreshCompleted();
}
}, 2000);
}
public override void OnDestroyView()
{
if (_ptrView != null)
{
_ptrView.RefreshActivated -= ptr_view_RefreshActivated;
_ptrView = null;
}
base.OnDestroyView();
}
public override void OnResume()
{
base.OnResume();
ListView.ItemClick += ListView_ItemClick;
}
public override void OnPause()
{
base.OnPause();
ListView.ItemClick -= ListView_ItemClick;
}
void ListView_ItemClick(object sender, AdapterView.ItemClickEventArgs e)
{
Toast.MakeText(Activity,e.Position+ " Clicked",ToastLength.Short).Show();
}
}
HomeScreenAdapter.cs
public class HomeScreenAdapter :BaseAdapter<TableItem>
{
public HomeScreenAdapter(Activity content, List<TableItem> items)
{
_content = content;
_items = items;
}
public override long GetItemId(int position)
{
return position;
}
public override View GetView(int position, View convertView, ViewGroup parent)
{
var item = _items[position];
var view = convertView;
if (view == null)
view = _content.LayoutInflater.Inflate(Resource.Layout.CustomView, null);
view.FindViewById<TextView>(Resource.Id.Text1).Text = item.Heading;
view.FindViewById<TextView>(Resource.Id.Text2).Text = item.Subheading;
return view;
}
public override int Count
{
get { return _items.Count; }
}
public override TableItem this[int position]
{
get { return _items[position]; }
}
}
}
im getting this error
Error 1 The best overloaded method match for 'ListViewPullToRefresh.HomeScreenAdapter.HomeScreenAdapter(Android.App.Activity, System.Collections.Generic.List)' has some invalid arguments C:\Users******\Documents\Visual Studio 2013\Projects\ListViewPullToRefresh\ListViewPullToRefresh\Fragments\SampleListFragment.cs 43 32 ListViewPullToRefresh
Error 2 Argument 1: cannot convert from 'ListViewPullToRefresh.Fragments.SampleListFragment' to 'Android.App.Activity' C:\Users****\Documents\Visual Studio 2013\Projects\ListViewPullToRefresh\ListViewPullToRefresh\Fragments\SampleListFragment.cs 43 54 ListViewPullToRefresh
when i putting my custom adapter to the fragment, i get the error here ListView.Adapter = new HomeScreenAdapter(this, _itemHeading); and here public HomeScreenAdapter(Activity content, List<TableItem> items)
{
_content = content;
_items = items;
}