Develop Reference

Bottom Sheet Dialog only showing one item of recyclerview

I realise this question has been asked previously but the answers provided haven't helped me out. I cannot see what is going wrong here.
I have an activity, in which I display a bottom sheet, the bottom sheet has a title and a recyclerview. The recycler view is only displaying one item, regardless of how many are passed to the adapter. It is possible to scroll through the items but only one at any time is visible.
Here is my activity xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
tools:context=".features.order.automatedcheckout.view.AutomatedCheckoutQRCodeActivity"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/scanBarcodeInstruction"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_marginTop="50dp"
android:text="Scan the barcode to get started"
android:textSize="18sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<androidx.constraintlayout.widget.Guideline
android:id="#+id/loadingGuideline"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.5"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ProgressBar
android:id="#+id/progressIndicator"
app:layout_constraintBottom_toTopOf="#+id/loadingGuideline"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#+id/scanBarcodeInstruction"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/qrcodeImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#+id/scanBarcodeInstruction"/>
<TextView
android:id="#+id/tenderName"
app:layout_constraintTop_toBottomOf="#+id/qrcodeImageView"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
android:id="#+id/changeTenderButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="10dp"
android:visibility="gone"
android:layout_marginBottom="20dp"
android:layout_marginRight="20dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:text = "Change Tender"/>
</androidx.constraintlayout.widget.ConstraintLayout>
and here is my bottom sheet fragment xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/bottomSheetLayout"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/tenderTitle"
android:layout_marginTop="20dp"
android:layout_marginStart="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SELECT"/>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/tenderList"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</androidx.appcompat.widget.LinearLayoutCompat>
my bottom sheet fragment:
class TenderBottomSheetFragment : BottomSheetDialogFragment() {
private var _binding: FragmentTenderBottomSheetBinding? = null
private val binding get() = _binding!!
private lateinit var onTenderClicks:(tenderDetails: Pair<Int?, String?>) -> Unit
lateinit var adapter: TenderAdapter
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
_binding = FragmentTenderBottomSheetBinding.inflate(inflater, container, false)
adapter = TenderAdapter (
arguments?.parcelableArrayList(ARG_TENDERS)!!,
onTenderClicks
)
return binding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
val layoutManager = LinearLayoutManager(requireContext())
binding.tenderList.layoutManager = layoutManager
binding.tenderList.addItemDecoration(DividerItemDecoration(requireContext(), layoutManager.orientation))
binding.tenderList.adapter = adapter
}
companion object {
fun newInstance(
campusTenders: List<TenderKt>,
onTenderClick: (tenderDetails: Pair<Int?, String?>) -> Unit
): TenderBottomSheetFragment {
val tenderDialogFragment = TenderBottomSheetFragment()
tenderDialogFragment.onTenderClicks = onTenderClick
tenderDialogFragment.apply {
arguments = Bundle().apply {
putParcelableArrayList(ARG_TENDERS, ArrayList(tenders))
}
}
return tenderDialogFragment
}
}
override fun onDestroyView() {
super.onDestroyView()
_binding = null
}
}
I'm sure this is something really simple but unfortunately right now, I'm not seeing it. If anyone could help I would really appreciate it.
UPDATE
Here is the recycler item layout:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools"
android:layout_marginStart="10dp"
android:layout_marginEnd="10dp"
xmlns:app="http://schemas.android.com/apk/res-auto">
<TextView
android:id="#+id/campus_tender_name"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
tools:text ="Flex Account"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</androidx.constraintlayout.widget.ConstraintLayout>
I have now updated that to:
<TextView
android:id="#+id/campus_tender_name"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:padding="10dp"
tools:text = "Flex Account"
android:textSize="16sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
and that works fine. So it was the constraint layout in the recycler view item

Fragment not showing properly

I am learning Kotlin, have done apps in Java before. I now have an activity with an Toolbar, NavigationView and a FragmentView. As I understand this: Fragment Tutorial, it is enough to state the Fragment in the xml file.
I have this activity_main.xml file:
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout
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/navigation_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/main_app_bar_layout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="#style/AppTheme.AppBarOverlay"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.Toolbar
android:id="#+id/main_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#android:color/holo_blue_light"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</com.google.android.material.appbar.AppBarLayout>
<com.google.android.material.navigation.NavigationView
android:id="#+id/main_navigation"
android:layout_marginTop="?attr/actionBarSize"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="#layout/navigation_header"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/main_app_bar_layout"
app:menu="#menu/navigation_menu" />
<androidx.fragment.app.FragmentContainerView
android:layout_marginTop="?attr/actionBarSize"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/main_container"
android:name="com.example.android.camerax.tflite.TestFragment"
tools:layout="#layout/fragment_test" />
</androidx.drawerlayout.widget.DrawerLayout>
This is the fragment_test.xml:
<androidx.constraintlayout.widget.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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.android.camerax.tflite.TestFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/hello_blank_fragment"
android:textAlignment="center"
android:gravity="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
This is the Activity:
class CameraActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {
private lateinit var fragment: CameraActivityFragment
private lateinit var navigationDrawer: DrawerLayout
private lateinit var toolbar: Toolbar
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_camera)
navigationDrawer = findViewById(R.id.navigation_container)
// Handle user consent update
toolbar = findViewById(R.id.main_toolbar)
setSupportActionBar(toolbar)
val toggle = ActionBarDrawerToggle(
this,
navigationDrawer,
toolbar,
R.string.navigation_drawer_open,
R.string.navigation_drawer_close
)
navigationDrawer.addDrawerListener(toggle)
toggle.syncState()
val navigationView: NavigationView = findViewById(R.id.main_navigation)
navigationView.setNavigationItemSelectedListener(this)
}
override fun onNavigationItemSelected(item: MenuItem): Boolean {
if (item.itemId == R.id.show_recordings) {
// Start ListView
}
navigationDrawer.closeDrawer(GravityCompat.START)
return true
}
}
and here is the TestFragment.kt:
class TestFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_test, container, false)
}
companion object {
// TODO: Rename and change types and number of parameters
#JvmStatic
fun newInstance(param1: String, param2: String) =
TestFragment().apply {
arguments = Bundle().apply {
}
}
}
}
I have tried to read the link above and also follow this: AndroidTrivia. No success and I really think this is quite basic and should work. When I run the debugger I can see that onCreateView is called in the Fragment, as it should be.
This is how it looks. Sometimes, the text blips on the screen. So seems like something is overwriting the fragment?
screenshot 1
screenshot 2
Edit
After updating the FragmentContainerView with elevation 9dp, the text is shown. But now the Toolbar is hidden, although there is a marginTop for the FragmentContainerView. Screenshot 3

There are two things I would like to suggest here.
First if possible get back to ConstraintLayout as in your last answer. It is not necessary for sure, but would recommend.
Second the blipping might be cause by the difference in elevation since the elevation of NavigationView is different.
So I suggest you add the following to your FragmentContainerView
<androidx.fragment.app.FragmentContainerView
android:layout_marginTop="?attr/actionBarSize"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/main_container"
android:elevation="9dp"
android:name="com.example.android.camerax.tflite.TestFragment"
tools:layout="#layout/fragment_test" />
9dp since most Android Views like BottomNav etc are upto 8dp
Also would recommend to modify your fragment_test as follows and add the following
<androidx.constraintlayout.widget.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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white"
android:clickable="true"
android:focusable="true"
tools:context="com.example.android.camerax.tflite.TestFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/hello_blank_fragment"
android:textAlignment="center"
android:gravity="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

Getting DrawerLayout must be measured with MeasureSpec.EXACTLY when adding the drawer layout

I am trying to add drawerlayout in my fragment home. I am getting java.lang.IllegalArgumentException: DrawerLayout must be measured with MeasureSpec.EXACTLY. this error when I tried to attach drawer layout to my fragment.
I have root layout as constraint layout. Firstly I tried with root layout as drawerlayout still I wast getting this exception so I tried adding constraint layout to it but did not work.
It works when I give the hard coded value to height and width as 500dp.
But hard coded value cant be given as it will not be good practice for all devices size it will differ.
Below is my code
drawer layout
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.drawerlayout.widget.DrawerLayout
android:id="#+id/drawer"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_width="match_parent"
android:layout_height="0dp"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/fragment_home"
android:visibility="visible" />
<com.google.android.material.navigation.NavigationView
android:id="#+id/nav_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:layout_gravity="start">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
android:id="#+id/nav_header"
layout="#layout/nav_header" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fadeScrollbars="true"
android:scrollbars="none">
<include
android:id="#+id/menuItems"
layout="#layout/layout_navigation_menu" />
</ScrollView>
</LinearLayout>
</com.google.android.material.navigation.NavigationView>
</androidx.drawerlayout.widget.DrawerLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
Home fragment layout
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:fillViewport="true"
android:fitsSystemWindows="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/root"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<include android:id="#+id/app_bar"
layout="#layout/app_bar_main"/>
<RelativeLayout
android:id="#+id/relative_accept"
android:layout_width="match_parent"
android:layout_height="#dimen/margin_55"
android:orientation="horizontal"
android:background="#color/green_500"
app:layout_constraintTop_toBottomOf="#id/app_bar">
<androidx.appcompat.widget.AppCompatTextView
android:layout_width="wrap_content"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:textColor="#color/white"
android:layout_marginLeft="#dimen/margin_16"
android:layout_marginStart="#dimen/margin_16"
android:layout_marginRight="#dimen/margin_16"
android:layout_marginEnd="#dimen/margin_16"
android:text="#string/accepting_orders"
android:fontFamily="#font/roboto_regular"
android:textSize="#dimen/text_size_15"
android:layout_alignParentLeft="true"
android:layout_height="wrap_content" />
<Switch
android:id="#+id/switch1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:track="#drawable/switch_track_selector"
android:layout_centerVertical="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
tools:ignore="UseSwitchCompatOrMaterialXml" />
</RelativeLayout>
<FrameLayout
android:id="#+id/frameLayout_tab"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/relative_accept">
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="42dp"
android:layout_marginStart="#dimen/margin_16"
android:layout_marginLeft="#dimen/margin_16"
android:layout_marginTop="#dimen/margin_20"
android:layout_marginEnd="#dimen/margin_16"
android:layout_marginRight="#dimen/margin_16"
android:background="#drawable/grey_drawable"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:tabGravity="fill"
app:tabIndicatorHeight="0dp"
app:tabMode="fixed"
android:onClick="#{(v)->click.onClick(v)}"
app:tabBackground="#drawable/tab_selector"
app:tabSelectedTextColor="#color/white" />
</FrameLayout>
<androidx.viewpager.widget.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintTop_toBottomOf="#+id/frameLayout_tab" />
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>
Home fragment
class HomeFragment : BaseFragment() , View.OnClickListener{
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? = inflater.inflate(R.layout.drawer_layout_navigation_view, container, false)
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
init()
controlInit()
}
override fun init() {
val toggle = ActionBarDrawerToggle(
(activity as MainActivity),
drawer,
R.string.navigation_drawer_open,
R.string.navigation_drawer_close
)
drawer.addDrawerListener(toggle)
tabs.setupWithViewPager(view_pager)
bindViewPagerAdapter(view_pager, (activity as MainActivity))
bindViewPagerTabs(tabs, view_pager)
tabSettings()
}
private fun tabSettings() {
tabs.bringToFront()
view_pager.addOnPageChangeListener(object : ViewPager.OnPageChangeListener {
override fun onPageScrolled(
position: Int, positionOffset: Float, positionOffsetP: Int
) {
}
override fun onPageSelected(position: Int) {}
override fun onPageScrollStateChanged(i: Int) {}
})
}
private fun bindViewPagerAdapter(view: ViewPager?, mainActivity: MainActivity) {
val adapter = OrdersAdapter(view?.context!!, childFragmentManager)
view.adapter = adapter
}
private fun bindViewPagerTabs(view: TabLayout, pagerView: ViewPager?) {
view.setupWithViewPager(pagerView, true)
}
private fun controlInit() {
imageView_drawer.setOnClickListener(this)
}
#SuppressLint("WrongConstant")
override fun onClick(p0: View) {
when (p0.id) {
R.id.imageView_drawer -> {
drawer.openDrawer(Gravity.START)
}
}
}
companion object {
#JvmStatic
fun newInstance() =
HomeFragment().apply {}
}
}
Please help with this.Thank you....

Your layout actually worked just fine when I tested it so I am not sure if the issue lies with the layout. However your layout files are overly complex, you don't really need any of the nested layouts that you have and can achieve the same results without. ConstraintLayout was developed with the purpose of simplifying layout hierarchies so you should be able to just use that to organise your child views.
Also the NavigationView component is meant to be used to display a menu from a menu resource, not just to be used as a wrapper for your own. Either choose to display your own menu completely or use their implementation as intended. There is some nice documentation for this on the [Material Design website] here.
So may I suggest you try to cut down on nesting your layouts and then see whether this incidentally fixes your problem.
The hierarchy that you might want would probably look something like this:
drawer_layout.xml
<DrawerLayout>
<include layout="#layout/home" />
<NavigationView />
</DrawerLayout>
home.xml
<ScrollView>
<ConstraintLayout>
<include layout="#layout/app_bar_main"/>
<TextView />
<Switch />
<TabLayout />
<ViewPager />
</ConstraintLayout>
</ScrollView>

EditText not resize based on content in a viewpager

I have a simple structure. MainActivity with BottomNavigationView and NavController. In this nav controller, i have 4 items. One of them is FavoritesFragment. This fragment has simple layout:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".view.main.favorites.FavoritesFragment">
<com.google.android.material.tabs.TabLayout
android:id="#+id/tlTest"
android:layout_width="match_parent"
android:layout_height="40dp"
app:layout_constraintTop_toTopOf="parent" />
<androidx.viewpager.widget.ViewPager
android:id="#+id/vpTest"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="#id/tlTest"
app:layout_constraintBottom_toBottomOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
With following code:
FragmentAdapter
package com.lust.ahri.view.main.favorites
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentManager
import androidx.fragment.app.FragmentPagerAdapter
import com.lust.ahri.view.base.BaseFragment
class TestAdapter(fragmentManager: FragmentManager) : FragmentPagerAdapter(fragmentManager, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
private val fragments: MutableList<BaseFragment> = mutableListOf()
private val titles: MutableList<String> = mutableListOf()
override fun getItem(position: Int): Fragment {
return fragments[position]
}
override fun getCount(): Int {
return fragments.count()
}
override fun getPageTitle(position: Int): CharSequence? {
return titles[position]
}
fun addFragment(fragment: BaseFragment, title: String) {
fragments.add(fragment)
titles.add(title)
}
}
And FavoritesFragment
class FavoritesFragment : BaseFragment() {
private lateinit var adapter: TestAdapter
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_favorites, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
adapter = TestAdapter(childFragmentManager)
adapter.addFragment(TestFragment(), "Test1")
adapter.addFragment(TestFragment(), "Test2")
vpTest.adapter = adapter
tlTest.setupWithViewPager(vpTest)
}
}
Problem that in my TestFragment i have layout:
<?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="match_parent"
android:gravity="center|top">
<androidx.appcompat.widget.AppCompatEditText
android:id="#+id/test1"
android:layout_width="wrap_content"
android:hint="10"
android:maxLines="1"
android:maxLength="10"
android:layout_height="50dp" />
<EditText
android:layout_width="wrap_content"
android:hint="10"
android:maxLines="1"
android:maxLength="10"
android:layout_height="50dp"
android:layout_marginTop="70dp" />
</LinearLayout>
I meant that my edit texts will resize with wrap_content like as usual depending on the number of characters, in fact, the fields do not change their size but are only cropped.
I tried to change my layout to Constraint, Relative or another, but actually i couldn't find any solution.
I need an answer how to make edit texts change their width in a viewpager like a default layout behaviour and why it's happening.

I think the problem lies in the ViewPager 0dp height. Try this
<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"
>
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/Widget.AppCompat.PopupMenu.Overflow" />
<android.support.design.widget.TabLayout
android:id="#+id/mtab_ID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabIndicatorColor="#color/colorAccent1"
app:tabIndicatorHeight="3dp"
app:tabTextColor="#color/colorWhite"
/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/mViewpager_ID"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/app_bar"
/>
</RelativeLayout>

How to retain state of views of orientation changes in Android Conductor?

I am currently learning about the Conductor framework for Android and have a bit of a problem or misunderstanding of how it works.
I was under the impression that the method
setRetainViewMode(RetainViewMode.RETAIN_DETACH);
would save the states of the views in the controller. To test the behaviour, I added EditText views, entered a value in it and rotated the screen. I also added 2 views with onclick listeners attached, changing the background color onclick
The result of the test was that the EditText views maintained the state and preserved the entered values. But the 2 views, changed back to their original background color (none).
This is the behaviour of the views regardless on which RetainViewMode is set
I have this simple MainActivity (note: I'm writing in Kotlin):
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
var router: Router = Conductor.attachRouter(this, controller_container, savedInstanceState)
if (!router.hasRootController()) {
var t : TestController = TestController()
t.retainViewMode = Controller.RetainViewMode.RETAIN_DETACH
router.setRoot(RouterTransaction.with(t))
}
}
companion object doTask {
fun start(activity : Activity) {
val intent = Intent(activity, MainActivity::class.java)
activity.startActivity(intent)
}
}
}
And here is the the TestController:
class TestController : BaseController() {
var i : Int = 0
var h : Int = 0
override fun onViewBound(view: View) {
view.a.setOnClickListener {
i++
if (i % 2 == 0) {
view.a.setBackgroundColor(ContextCompat.getColor(applicationContext, R.color.white))
} else {
view.a.setBackgroundColor(ContextCompat.getColor(applicationContext, R.color.turtle_green))
}
}
view.b.setOnClickListener {
h++
if (h % 2 == 0) {
view.b.setBackgroundColor(ContextCompat.getColor(applicationContext, R.color.white))
} else {
view.b.setBackgroundColor(ContextCompat.getColor(applicationContext, R.color.blue_light))
}
}
}
override fun inflateView(inflater: LayoutInflater, container: ViewGroup): View {
return inflater.inflate(R.layout.controller_layout_test, container, false)
}
}
And xml layout file controller_layout_test:
<?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">
<requestFocus></requestFocus>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/logo_simple"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="300dp"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_margin="30dp"
android:layout_gravity="center"
android:background="#color/transparent50p"
android:padding="20dp">
<EditText
android:id="#+id/gt"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:padding="6dp"
android:background="#color/white_transparent50p"/>
/>
<EditText
android:id="#+id/erergeargf"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:padding="6dp"
android:background="#color/white_transparent50p"/>
<View
android:id="#+id/a"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_margin="5dp"
android:layout_gravity="center"></View>
<View
android:id="#+id/b"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_margin="5dp"
android:layout_gravity="center"></View>
</LinearLayout>
</ScrollView>
</FrameLayout>
activity_main xml layout looks like this:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
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"
android:fitsSystemWindows="true"
tools:context="dk.minreklame.minetilbud_v2.MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
/>
</android.support.design.widget.AppBarLayout>
<com.bluelinelabs.conductor.ChangeHandlerFrameLayout
android:id="#+id/controller_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
</android.support.design.widget.CoordinatorLayout>

As your views have references to the host Activity, they will never be retained across orientation changes. That would cause a memory leak. The docs on RETAIN_DETACH state:
The Controller will retain its reference to its view when detached, but will still release the reference when a config change occurs.