How to scroll the page using NestedScrollView to a given position. I have a NestedScrollView which I set onCreateView to binding.NestedScrollView.scrollto(0,100) but nothing happens. How to fix it?
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
binding.scrollView2.scrollTo(0,100)
}
CodePudding user response：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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/frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:elevation="4dp"
tools:context=".ComentThemeScreenFragment">
<!-- TODO: Update blank fragment layout -->
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@ id/constlay"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/background_2">
<androidx.cardview.widget.CardView
android:id="@ id/CardTost"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:layout_marginStart="20dp"
android:layout_marginEnd="20dp"
android:background="@color/primary_text"
android:backgroundTint="@color/primary_text"
android:foregroundGravity="bottom"
android:visibility="gone"
app:cardCornerRadius="8dp"
app:layout_constraintBottom_toBottomOf="@ id/scrollView2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="12dp"
android:layout_marginBottom="12dp"
android:orientation="horizontal">
<ImageView
android:id="@ id/imageView22"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="4dp"
android:layout_weight="1"
android:visibility="visible"
app:srcCompat="@drawable/star_filled_white" />
<TextView
android:id="@ id/textView42"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:fontFamily="@font/roboto"
android:text="Тема добавлена в избранное"
android:textColor="#FFFFFF"
android:textSize="16sp" />
</LinearLayout>
</androidx.cardview.widget.CardView>
<androidx.core.widget.NestedScrollView
android:id="@ id/scrollView2"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="@ id/toolbar3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@ id/toolbar2">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="@ id/linearLayout8"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/background_1"
android:orientation="vertical"
android:padding="20dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="@ id/imageView17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="start|left"
android:layout_weight="1"
android:src="@drawable/ic_user_images_1useravatar" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="5dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:id="@ id/textView35"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_weight="1"
android:fontFamily="@font/roboto_medium"
android:inputType="textMultiLine"
android:text="TextView"
android:textColor="@color/primary_text"
android:textSize="14sp" />
<TextView
android:id="@ id/textView36"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:fontFamily="@font/roboto_medium"
android:text="TextView"
android:textColor="@color/secondary_text"
android:textSize="12sp" />
</LinearLayout>
</LinearLayout>
<TextView
android:id="@ id/textView37"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_marginBottom="10dp"
android:fontFamily="@font/roboto"
android:inputType="textMultiLine"
android:text="TextView"
android:textColor="@color/primary_text"
android:textSize="16sp"
app:lineHeight="24dp" />
</LinearLayout>
<LinearLayout
android:id="@ id/linearLayout9"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="16dp"
android:background="@color/background_1"
android:orientation="vertical"
android:padding="20dp">
<TextView
android:id="@ id/textView39"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:layout_marginBottom="20dp"
android:fontFamily="@font/roboto_medium"
android:text="0 Комментариев"
android:textColor="@color/primary_text"
android:textSize="20sp" />
<androidx.recyclerview.widget.RecyclerView
android:id="@ id/RcView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<TextView
android:id="@ id/textView19"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="@font/roboto"
android:text="Обсуждение еще не началось Добавьте тему в избранное, и Вы сможете получать уведомления о начале беседы"
android:textColor="@color/secondary_text"
android:textSize="16sp"
android:visibility="gone" />
</LinearLayout>
</LinearLayout>
</androidx.core.widget.NestedScrollView>
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="@ id/toolbar2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="@color/background_1"
android:elevation="4dp"
android:minHeight="?attr/actionBarSize"
android:theme="?attr/actionBarTheme"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<ImageButton
android:id="@ id/imageButton5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="10dp"
android:backgroundTint="@color/white"
android:foregroundGravity="left|center"
android:src="@drawable/arrow_left" />
<ImageButton
android:id="@ id/imageButton6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_margin="10dp"
android:backgroundTint="@color/white"
android:foregroundGravity="left|center"
android:src="@drawable/stargrey"
tools:layout_editor_absoluteX="67dp"
tools:layout_editor_absoluteY="10dp" />
</com.google.android.material.appbar.CollapsingToolbarLayout>
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="@ id/toolbar3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:elevation="4dp"
android:minHeight="?attr/actionBarSize"
android:theme="?attr/actionBarTheme"
android:visibility="gone"
app:layout_constraintBottom_toTopOf="@ id/bottomAppBar2"
app:layout_constraintEnd_toEndOf="@ id/bottomAppBar2"
app:layout_constraintStart_toStartOf="@ id/bottomAppBar2">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="16dp">
<LinearLayout
android:id="@ id/linearLayout10"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:layout_marginEnd="10dp"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@ id/imageView21"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@ id/textView40"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="@font/roboto_medium"
android:text="TextView"
android:textColor="@color/primary_text"
android:textSize="14sp" />
<TextView
android:id="@ id/textView38"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="@font/roboto"
android:shadowColor="@color/secondary_text"
android:text="TextView"
android:textSize="12sp" />
</LinearLayout>
<ImageButton
android:id="@ id/imageView21"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:backgroundTint="#FFFFFF"
android:src="@drawable/cross_coment"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.appbar.CollapsingToolbarLayout>
<com.google.android.material.bottomappbar.BottomAppBar
android:id="@ id/bottomAppBar2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#FFFFFF"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
tools:ignore="BottomAppBar">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="16dp">
<EditText
android:id="@ id/editTextTextPersonName"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginEnd="10dp"
android:background="@android:drawable/divider_horizontal_dim_dark"
android:ems="10"
android:hint="Комментарий"
android:inputType="textMultiLine|textPersonName"
android:textColor="@color/primary_text"
android:textColorHint="@color/secondary_text"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@ id/imageButton4"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="@ id/imageButton4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:backgroundTint="#FFFFFF"
android:src="@drawable/send_2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.bottomappbar.BottomAppBar>
</androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>
CodePudding user response：
Your NestedScrollView has 0 width and 0 height so it's simply invisible. I suggest you changing it both to match_parent. Also LinearLayout inside your scrollview should has wrap_content height:
<androidx.core.widget.NestedScrollView
android:id="@ id/scrollView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toTopOf="@ id/toolbar3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@ id/toolbar2">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
...
</LinearLayout>
</androidx.core.widget.NestedScrollView>
And then to scroll use this:
scrollView2.post({
binding.scrollView2.scrollTo(0,100);
});