Develop Reference

image slider works in activity but not in fragment

the code from this video https://www.youtube.com/watch?v=1AS5HcXPpqk works fine in activity, but when i try to implement it in fragment it crashes.
java code and xml file respectively
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_facts, container, false);
ImageSlider imageSlider = (ImageSlider) getView().findViewById(R.id.slide);
List<SlideModel> slideModels = new ArrayList<>();
slideModels.add(new SlideModel(R.drawable.ic_launcher_background, "Image1"));
slideModels.add(new SlideModel(R.drawable.ic_launcher_background, "Image2"));
slideModels.add(new SlideModel(R.drawable.ic_launcher_background, "Image3"));
imageSlider.setImageList(slideModels, true);
return view;
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:background="#E4E3E3">
<com.denzcoskun.imageslider.ImageSlider
android:id="#+id/slide"
android:layout_width="match_parent"
android:layout_height="250dp"
app:auto_cycle="true"
app:delay="0"
app:period="1000"
app:corner_radius="20"
/>
</RelativeLayout>

Don't
ImageSlider imageSlider = (ImageSlider) getView().findViewById(R.id.slide);
Do
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_facts, container, false);
ImageSlider imageSlider = (ImageSlider) view.findViewById(R.id.slide);

Change this line
ImageSlider imageSlider = (ImageSlider) getView().findViewById(R.id.slide);
to
ImageSlider imageSlider = (ImageSlider) getActivity().findViewById(R.id.slide);
You need to pass correct context getActivity()

Unable to Position Bottom Sheet Dialog at the bottom of the screen

I have a Video Detail Fragment which I want to behave as a bottom sheet behaviour, but unfortunately, the dialog is getting displayed at the centre of the screen. I am unable to figure out the exact problem in the code. Below I am attaching the code and the layout file, in regard to the same.
This is my Video Detail fragment:
public class VideoDetailsFragment extends BottomSheetDialogFragment {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AppCompatDialog dialog = new AppCompatDialog(getActivity());
dialog.setTitle(titleId);
return dialog;
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View dialogView = inflater.inflate(R.layout.video_detail_fragment, container, false);
Button cancelButton = dialogView.findViewById(R.id.track_selection_dialog_cancel_button);
Button okButton = dialogView.findViewById(R.id.track_selection_dialog_ok_button);
return dialogView;
}
public static final class TrackSelectionViewFragment extends BottomSheetDialogFragment
implements TrackSelectionView.TrackSelectionListener {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.exo_track_selection_dialog, container, /* attachToRoot= */ false);
TrackSelectionView trackSelectionView = rootView.findViewById(R.id.exo_track_selection_view);
trackSelectionView.setShowDisableOption(true);
trackSelectionView.setAllowMultipleOverrides(allowMultipleOverrides);
trackSelectionView.setAllowAdaptiveSelections(allowAdaptiveSelections);
trackSelectionView.init(mappedTrackInfo, rendererIndex, isDisabled, overrides, /* listener= */ this);
return rootView;
}
}
}
The xml file for video_detail_fragment:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="270dp"
android:visibility="visible"
app:behavior_hideable="true"
app:behavior_peekHeight="0dp"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
>
<FrameLayout
android:id="#+id/child_fragment_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="end">
</LinearLayout>
</LinearLayout>
I went through many posts but almost all the posts were showing the solution as setting the app attribute app:layout_behavior="android.support.design.widget.BottomSheetBehavior". But it's not working in my case. Kindly help me understand as to where I am doing wrong?

Android: Fragment showing from old fragment

I have two fragments on top of each other when I call the second fragment I still the buttons from the first fragment stay visible and functional.
I tried many many methods but didn't work
This one gave me this error:
java.lang.IllegalArgumentException: No view found for id 0x7f0e0004 (*.test:id/customId) for fragment SecondFragment{adef947 #0 id=0x7f0e0004}
and This
java.lang.IllegalArgumentException: No view found for id 0x7f0e00ae (sy.aya.ayaisp.test:id/gatesViewpager) for fragment SecondSFragment{adef947 #0 id=0x7f0e00ae}
my code is as follows:
FirstFragment.java
public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) {
View myView = inflater.inflate(R.layout.first_fragment, container, false);
Button FBtn = (Button) myView.findViewById(R.id.Fbutton);
FBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Bundle bundle = new Bundle();
bundle.putString("second", "f button");
SecondFragment secondFragment = new secondFragment();
secondFragment.setArguments(bundle);
FragmentTransaction ft = getChildFragmentManager().beginTransaction();
ft.setCustomAnimations(R.anim.slide_in_up, R.anim.slide_in_up);
ft.replace(R.id.s_con, secondFragment).addToBackStack("back").commit();
}
});
SecondFrag.java
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
String bundleString = this.getArguments().getString("second");
View view = inflater.inflate(R.layout.s_rv, container, false);
RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.s_recyclerview);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
if (bundleString == "agents button") {
recyclerView.setAdapter(new SecondAdapter(getContext()));
}
}
first_fragment.xml
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/s_con"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="#+id/Fbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="secondFragment"/>
</android.support.constraint.ConstraintLayout>
s_rv.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<sy.aya.ayaisp.ExpandableRecyclerView
android:id="#+id/s_recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="5dp"
android:clipToPadding="false"
android:scrollbars="vertical" />
</FrameLayout>
Thank you for your help

In second fragment layout "s_rv" in root element of xml add some background, clickable="true" and focusable="true".
And in first fragment layout wrap your button in LinearLayout. two days back I was also facing same issue it was solved after that.

It is because in your first fragment the id of button is "pos_agents_button" but in findViewById you are trying to find "R.id.Fbutton".
Change
Button FBtn = (Button) myView.findViewById(R.id.Fbutton);
to
Button FBtn = (Button) myView.findViewById(R.id.pos_agents_button);
and everything should work fine.

How to apply inbuilt or custom theme to fragment within an activity?

My problem is to make a fragment full screen and apply custom theme on it. I tried this way but unable to get result. RssDetailViewFragment.cs consists following lines of code:
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);
// create ContextThemeWrapper from the original Activity Context with the custom theme
Context contextThemeWrapper = new ContextThemeWrapper(Activity, Android.Resource.Style.ThemeLightNoTitleBarFullScreen);
// clone the inflater using the ContextThemeWrapper
LayoutInflater localInflater = inflater.CloneInContext(contextThemeWrapper);
rootView = localInflater.Inflate(Resource.Layout.RSSFeedDetails, null, false);
// inflate progressbar
progressBar = rootView.FindViewById<ProgressBar>(Resource.Id.progress_bar);
progressBar.Visibility = ViewStates.Visible;
// setting control toolbar
Toolbar toolbar = rootView.FindViewById<Toolbar>(Resource.Id.top_control_toolbar);
((AppCompatActivity)this.Activity).SetSupportActionBar(toolbar);
// setting icon on toolbar
toolbar.SetNavigationIcon(Resource.Drawable.ic_back20);
toolbar.SetBackgroundColor(Resources.GetColor(Resource.Color.primary));
View navigationIcon = toolbar.GetChildAt(1); //NavigationIcon
and my xml file for RssFeedDetals is
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="60dp"
android:orientation="vertical"
android:background="#color/viewBackground">
<include
android:id="#+id/top_control_toolbar"
layout="#layout/TopControlToolbar" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/viewBackground">
<WebView
android:id="#+id/webview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</ScrollView>
<ProgressBar
android:id="#+id/progress_bar"
style="#android:style/Widget.DeviceDefault.ProgressBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="invisible" />
</LinearLayout>
Main thing to ask this question is to make the fragment fullscreen on Min Sdk 15 plus.
Thank you.

I want to hide the toolbar of activity and statusBar of app and cover the area with fragment view.
When you show your RssDetailViewFragment you could hide the Statusbar and Toolbar like this :
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
SetHasOptionsMenu(true);
//Hide the StatusBar
WindowManagerLayoutParams attr = Activity.Window.Attributes;
attr.Flags = WindowManagerFlags.Fullscreen;
Activity.Window.Attributes = attr;
//Hide the ToolBar
ftoolbar = (V7Toolbar)Activity.FindViewById<V7Toolbar>(Resource.Id.toolbar);
ftoolbar.Visibility = ViewStates.Gone;
//Load views for this Fragment
View view = LayoutInflater.From(Activity).Inflate(Resource.Layout.MGradesView, null);
return view;
}

handle empty data view in recyclerview

How to handle empty data View in a RecyclerView ,I have tried so many ways from internet but none seems to work. I am also using realm database so I don't know if this is the right way to check if it is empty or not.
this is my Fragment xml where the RecyclerView is located
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/tv_no_data"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/holo_green_dark"
android:gravity="center"
android:text="emptty"
android:textAppearance="?android:textAppearanceMedium"
android:textColor="#android:color/white"
android:visibility="invisible" />
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_favorite"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimaryDark">
</android.support.v7.widget.RecyclerView>
</FrameLayout>
and this is my fragment class
public class FavouriteFragment extends Fragment {
RecyclerView mRecyclerView;
FavouriteAdapter adapter;
Realm mRealm;
int positions;
TextView emptyText;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.favourite_fragment,container,false);
mRealm=Realm.getDefaultInstance();
RealmQuery<news> quotesRealmQuery = mRealm.where(News.class).equalTo("favourite",true);
RealmResults<News> mResults = newsRealmQuery.findAll();
emptyText= (TextView) view.findViewById(R.id.tv_no_data);
//adapter=new FavouriteAdapter(getActivity(),mResults,mRealm);
mRecyclerView= (RecyclerView) view.findViewById(R.id.rv_favorite);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
if (!mResults.isEmpty()) {
//if data is available, don't show the empty text
emptyText.setVisibility(View.INVISIBLE);
adapter=new FavouriteAdapter(getActivity(),mResults,mRealm,pos,single);
mRecyclerView.setAdapter(adapter);
mRealm.addChangeListener(new RealmChangeListener<Realm>() {
#Override
public void onChange(Realm element) {
adapter.notifyItemRemoved(positions);
}
});
} else
emptyText.setVisibility(View.VISIBLE);
return view;
}

Your RecyclerView is not transparent so you should remember to hide it when is empty:
if (!mResults.isEmpty()) {
//if data is available, don't show the empty text
emptyText.setVisibility(View.INVISIBLE);
mRecyclerView.setVisibility(View.VISIBLE);
} else {
emptyText.setVisibility(View.VISIBLE);
mRecyclerView.setVisibility(View.GONE);
}