My ReycyclerView is not showing data, but once i removed .setHasFixedSize(true), then only it will display. However, this causes another problem. On the first time entering the fragment, it works fine, my actionBar is displaying, but on the second time, it somehow overlaps or pushes away my ActionBar.
I guess .sethasFixedSize is necessary but if i keep it, it will not display data. What causes this?
First time entering:
Second time entering (before notifyItemInserted()):
After notifyItemInserted():
fragment.xml:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/cartItemRv"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
fragment.kt:
onCreateView() {
binding.cartItemRv.layoutManager = LinearLayoutManager(context)
binding.cartItemRv.setHasFixedSize(true)
cartAdapter = CartAdapter(productNameList, productVariationList, cartItemList)
binding.cartItemRv.adapter = cartAdapter
//code for retrieving data from Firebase
cartAdapter.notifyItemInserted(productNameList.size-1)
}
Adapter:
class CartAdapter(...: RecyclerView.Adapter<CartAdapter.CartViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CartViewHolder {
val itemView = LayoutInflater.from(parent.context).inflate(R.layout.cart_item, parent, false)
return CartViewHolder(itemView, mListener)
}
override fun onBindViewHolder(holder: CartViewHolder, position: Int) {
...
}
override fun getItemCount(): Int {
return productNameList.size
}
inner class CartViewHolder(itemView: View, listener: onItemClickListener) : RecyclerView.ViewHolder(itemView){
...
}
}
about sethasFixedSize , if the size of your the RecyclerView depends on the adapter's content you have to set the sethasFixedSize vlaue : false
otherwise set it true .
// for depending on adapter
mRecyclerView.setHasFixedSize(false);
// for doesn't depend on adapter
mRecyclerView.setHasFixedSize(true);
add NestedScrollView on the parent of RecyclerView
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/cartItemRv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:nestedScrollingEnabled="false"/>
</androidx.core.widget.NestedScrollView>
</RelativeLayout>
Then set RecyclerView
cartItemRv.setHasFixedSize(false);
Related
I'm a Kotlin newbie learning how to create simple recyclerview apps. My code is supposed to list the integers 1..10 in vertically stacked cells. However, it only lists the first item. I've consulted several tutorials and reviewed my code several times(after long breaks), but I can't see anything wrong in my code.
I got the bright idea early today to print Log statements. Examining them, I note that my onBindViewHolder function is only called once. What blunder am I making?
Here is my log output:
D/QuoteAdapter: value is: 1
D/QuoteAdapter: index is: 0
D/QuoteAdapter: Size is: 10
my activity:
class MainActivity : AppCompatActivity() {
lateinit var mRecyclerView: RecyclerView
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
mRecyclerView = findViewById(R.id.recyclerView)
mRecyclerView.layoutManager = LinearLayoutManager(this)
mRecyclerView.adapter = QuoteAdapter()
//mRecyclerView.setHasFixedSize(true)
}
}
my adapter:
class QuoteAdapter : RecyclerView.Adapter<QuoteViewHolder>() {
private val listOfInts = intArrayOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
private val TAG = "QuoteAdapter"
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): QuoteViewHolder {
val view = LayoutInflater.from(parent.context)
.inflate(R.layout.recyclerview_item_row, parent, false)
return QuoteViewHolder(view)
}
override fun getItemCount(): Int {
Log.d(TAG, "Size is: ${listOfInts.size.toString()}")
return listOfInts.size
}
override fun onBindViewHolder(holder: QuoteViewHolder, position: Int) {
val item = listOfInts[position]
Log.d(TAG, "value is: ${item.toString()}")
Log.d(TAG, "index is: ${position.toString()}")
holder.listTitle.text = item.toString()
}
}
my viewholder:
class QuoteViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
val listTitle = itemView.findViewById(R.id.itemString) as TextView
}
my layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/itemString"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
my main layout is shown below:
<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=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
In your "my layout" try this:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/itemString"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
Notice layout_height of LinearLayout has changed to wrap_content
Also doubt you need the android:orientation="vertical" on your ViewHolders item xml unless you will add more than just 1 TextView in the future.
Like Zain says, you can just use a TextView on its own in a layout file, which will also fix the problem (so long as its height is wrap_content!)
There are actually a few included with Android - type android.R.layout. and you'll see a few things, like simple_list_item_1 which is just a styled TextView (you can ctrl+click the reference or whatever to look at the file). Can be nice if you just want to make a quick thing!
The ID of the TextView in android.R.layout.simple_list_item_1 is #android:id/text1 - note the android prefix, because its part of the android resources, not your app's. Which means you have to reference the ID in the same way as the layout, with android at the front: android.R.id.text1
You can get rid of the LinearLayout in the list item layout, and only keep the TextView.
So, replace your list item layout with:
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/itemString"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
Why do I get a NullPointerException in my ViewHolder's bindItems() method?
I've highlighted the line where I get the NullPointerException. The blogpost_author ID exists, as you can see in the XML, so what's the problem here? How is findViewById<TextView>(R.id.blogpost_author) returning null?
Adapter and ViewHolder code:
class BlogPostAdapter(val blogList: ArrayList<BlogPost>) : RecyclerView.Adapter<BlogPostAdapter.ViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) : BlogPostAdapter.ViewHolder {
val v = LayoutInflater.from(parent.context).inflate(R.layout.blog_post_list, parent, false)
return ViewHolder(v)
}
override fun getItemCount(): Int {
return blogList.size
}
override fun onBindViewHolder(holder: BlogPostAdapter.ViewHolder, position: Int) {
holder.bindItems(blogList[position])
}
class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
fun bindItems(blogPost: BlogPost) {
val blogPostAuthor = itemView.findViewById<TextView>(R.id.blogpost_author) // THIS LINE - NULL POINTER EXCEPTION
val blogPostTitle = itemView.findViewById<TextView>(R.id.blogpost_title)
blogPostAuthor.text = blogPost.author
blogPostTitle.text = blogPost.title
}
}
}
Activity code:
class BlogPostListActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.blog_post_list)
// Get the RecyclerView from XML itself
val recyclerView = findViewById<RecyclerView>(R.id.recyclerview)
// Add a layout manager - What does a layout manager do?
recyclerView.layoutManager = LinearLayoutManager(this, LinearLayout.VERTICAL, false)
// Create an array list to store blogposts using the the data class blogPost
val blogPosts = ArrayList<BlogPost>()
// Add some dummy data to the list
blogPosts.add(BlogPost(123, "First Blog Post", "John"))
blogPosts.add(BlogPost(456, "Second Blog Post", "Bob"))
blogPosts.add(BlogPost(789, "Third Blog Post", "Mary"))
// Create an adapter
val adapter = BlogPostAdapter(blogPosts)
// Add the adapter to the recyclerview
recyclerView.adapter = adapter
}
}
Kotlin data class:
data class BlogPost(val id: Int, val title: String, val author: String)
XML for RecyclerView:
<?xml version="1.0" encoding="utf-8"?>
<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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.topzap.android.kotlinlistapptest.BlogPostListActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toBottomOf="parent"/>
</android.support.constraint.ConstraintLayout>
XML for CardView layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/blogpost_author"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="AuthorPlaceHolder"
android:textAppearance="#style/Base.TextAppearance.AppCompat.Large"
/>
<TextView
android:id="#+id/blogpost_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="TitlePlaceHolder"
android:textAppearance="#style/Base.TextAppearance.AppCompat.Medium"
/>
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
You may be inflating the wrong layout within your RecyclerView.
This line within your onCreateViewHolder method:
val v = LayoutInflater.from(parent.context).inflate(R.layout.blog_post_list, parent, false)
You are inflating the blog_post_list.xml, which I'm assuming is the wrong layout file due to the fact you're also inflating that layout within your BlogPostListActivity here:
setContentView(R.layout.blog_post_list)
So when this line is called:
val blogPostAuthor = itemView.findViewById<TextView>(R.id.blogpost_author)
It is looking for the id 'blogpost_author' within R.layout.blog_post_list and as you can see there is no blogpost_author TextView within that layout so it returns null.
To sort it out, it should be straight forward and just change the layout resource that you're assigning to each ViewHolder within your onCreateViewHolder method with the correct layout for your CardView layout.
Which means the line should read something like:
val v = LayoutInflater.from(parent.context).inflate(R.layout.your_card_layout, parent, false)
I am displaying a list of countries along with their flags in recylerview
The 1st element does not have a image and uses a default image which is visible on launch of page
But when I scroll and come back to it the image gets changed to some random from the list which should not happen
This is my adapter
class CountryAdapter(private val list: MutableList<Data?>?) :
RecyclerView.Adapter<CountryAdapter.ViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val inflater = LayoutInflater.from(parent.context)
val binding = ElementCountryBinding.inflate(inflater)
return ViewHolder(binding)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
val country: Data? = list?.get(position)
if (country != null) {
holder.bind(country)
}
holder.itemView.setOnClickListener {
}
}
override fun getItemCount(): Int = list!!.size
inner class ViewHolder(val binding: ElementCountryBinding) :
RecyclerView.ViewHolder(binding.root) {
fun bind(country: Data) {
binding.data = country
if (country.filePath != null)
Glide.with(binding.root.context)
.load(country.filePath!!.trim()).into(binding.ivFlag)
}
}
}
This is the xml layout
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<variable
name="data"
type="com.mountmeru.model.Data" />
</data>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.cardview.widget.CardView
android:id="#+id/main_cardview"
android:layout_width="match_parent"
android:layout_height="80dp"
android:layout_marginBottom="5dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/iv_flag"
android:layout_width="100dp"
android:layout_height="70dp"
android:layout_marginStart="10dp"
android:adjustViewBounds="true"
android:src="#drawable/ic_share"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.AppCompatTextView
android:id="#+id/tvCountryName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:text="#{data.countryName}"
app:layout_constraintBottom_toBottomOf="#+id/iv_flag"
app:layout_constraintLeft_toRightOf="#+id/iv_flag"
app:layout_constraintTop_toTopOf="#+id/iv_flag" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
< /RelativeLayout>
</layout>
screenshot
So the default image you specified in your XML layout is the ic_share, this means that when onBindViewHolder is called, the image gets substituted by:
.load(country.filePath!!.trim()).into(binding.ivFlag)
However, you never specified that at position 0, the icon must be ic_share, so because of RecyclerView's nature, when you scroll downwards and upwards and the first itemHolder is created (again) it uses a recycled view from further down, and as you're not setting ic_share to iv_flag at position 0 it just uses the recycled view image.
If you just add a line of code like #ADM suggested in your bind method like this:
if(adapterPosition==0){
binding.ivFlag.setImageResource(R.drawable.ic_share)
}
With the ic_share, I think that should make it work
That's normal due to the recycling mechanism of views in RV/LV. To avoid that set it to null
if (country.filePath != null)
Glide.with(binding.root.context)
.load(country.filePath!!.trim()).into(binding.ivFlag)
else
binding.ivFlag.setImageDrawable(null)
assuming ivFlag is an ImageView, or a default/placeholder if you have it
This is happening because you never set ic_share during bind View.
inner class ViewHolder(val binding: ElementCountryBinding) :
RecyclerView.ViewHolder(binding.root) {
fun bind(country: Data) {
binding.data = country
if(adapterPosition==0){
binding.ivFlag.setImageResource(R.drawable.binding.ivFlag)
}else {
if (country.filePath != null)
Glide.with(binding.root.context)
.load(country.filePath!!.trim()).into(binding.ivFlag)
}
}
}
Having the function getItemViewType also solves the problem
override fun getItemViewType(position: Int): Int {
return position
}
I've got a CoordinatorLayout which contains a CollapsingToolbarLayout and a RecyclerView. Everything looks the way it's supposed to, except that when I try to scroll to the last item programmatically, it doesn't go all the way to the bottom. Instead, it does this:
I don't think this is a clipping problem, since the bottom item is fully there if I scroll down:
Here's the main layout:
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="150dp"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="16dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="#+id/toolbar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:contentInsetStart="72dp"
app:popupTheme="#style/AppTheme.PopupOverlay"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="#dimen/recyclerview_bottom_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
And here's the code that goes with the screencaps above:
class TestActivity : AppCompatActivity() {
private val itemNames = listOf("top item", "next item", "yada", "yada yada", "yada yada yada", "second last item", "last item")
private val selectedPosition = itemNames.size - 1
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.recyclerview_with_collapsing_toolbar)
setSupportActionBar(toolbar)
supportActionBar?.setTitle(R.string.some_title)
val recyclerView = findViewById<RecyclerView>(R.id.recycler_view)
recyclerView.setHasFixedSize(true)
val layoutManager = LinearLayoutManager(this)
recyclerView.layoutManager = layoutManager
recyclerView.adapter = MyAdapter()
// try to scroll to the initial selected position
recyclerView.scrollToPosition(selectedPosition)
// layoutManager.scrollToPosition(selectedPosition)
// layoutManager.scrollToPositionWithOffset(selectedPosition, resources.getDimensionPixelOffset(R.dimen.item_height))
// recyclerView.post {
// recyclerView.smoothScrollToPosition(selectedPosition)
// }
}
inner class MyAdapter: RecyclerView.Adapter<MyViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, itemType: Int): MyViewHolder {
val view = LayoutInflater.from(parent.context).inflate(R.layout.item_layout, parent, false)
return MyViewHolder(view)
}
override fun getItemCount(): Int {
return itemNames.size
}
override fun onBindViewHolder(vh: MyViewHolder, position: Int) {
vh.words.text = itemNames[position]
if (selectedPosition == position) {
vh.parent.setBackgroundColor(Color.MAGENTA)
} else {
vh.parent.setBackgroundColor(Color.BLACK)
}
}
}
inner class MyViewHolder(itemView: View): RecyclerView.ViewHolder(itemView) {
val parent = itemView
val words: TextView = itemView.findViewById(R.id.some_text)
}
}
Additional notes:
If I get rid of the CollapsingToolbarLayout then it does show the entire last item.
I've left some of my other attempts in the code above (commented out). None of them worked.
This example just involves a short static list and always scrolls to the same item, but the code I'm actually working on is a bit more complicated.
The designer really wants everything to look exactly as designed, and I'm not free to change the visual design.
How can I scroll to the last item in a RecyclerView that's inside a layout with a collapsing toolbar?
The problem is that getNestedScrollingParentForType(type) in NestedScrollingChildHelper#dispatchNestedScroll returns null for the non-touch scroll, so scrolling is not dispatched when it is done programmatically.
So we need to enable that before scrolling programmatically:
if (!recyclerView.hasNestedScrollingParent(ViewCompat.TYPE_NON_TOUCH)) {
recyclerView.startNestedScroll(View.SCROLL_AXIS_VERTICAL,ViewCompat.TYPE_NON_TOUCH);
}
// now smooth scroll your recycler view programmatically here.
A fix for this problem would be to collapse the toolbar before scrolling to the given position. This can be done by adding app_bar_layout.setExpanded(false) before scrollToPosition.
When I click on recycler view several times, it scrolls to bottom on random clicks.
I suspect the issue is with emulator. My AVD is Nexus 5 API 27 x86.
Question: How to eliminate this random scrolling ?
Here is minimal example: https://github.com/OleksandrBezhan/RecyclerViewAccidentalScrolling
Activity:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
recycler.layoutManager = LinearLayoutManager(this)
recycler.adapter = MyAdapter()
}
}
Adapter:
class MyAdapter : RecyclerView.Adapter<MyAdapter.ViewHolder>() {
class ViewHolder(view: View, val text: TextView) : RecyclerView.ViewHolder(view)
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view = LayoutInflater.from(parent.context)
.inflate(R.layout.item, parent, false)
return ViewHolder(view, view.text)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.text.text = "Hello world"
}
override fun getItemCount() = 3
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.constraint.ConstraintLayout>
item.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.constraint.ConstraintLayout>
Update:
I added OnScrollListener and it shows that on accidental scrolls the scroll state goes to SCROLL_STATE_FLING and then SCROLL_STATE_IDLE.
Whereas under normal circumstances the scroll state should go to SCROLL_STATE_TOUCH_SCROLL -> SCROLL_STATE_FLING -> SCROLL_STATE_IDLE.
recycler.addOnScrollListener(object: RecyclerView.OnScrollListener(){
override fun onScrollStateChanged(recyclerView: RecyclerView?, newState: Int) {
Log.d("TEST", "onScrollStateChanged: $newState")
}
})
D/TEST: onScrollStateChanged: 2
D/TEST: onScrollStateChanged: 0
// 1, 2, 0 in normal scrolling
It seems to be an emulator issue, since there is no problem on real device.