Если строка не содержит многобайтовых символов, и если вы хотите заменить только один символ, вы можете просто использовать strpos
Здесь функция, которая обрабатывает ошибки
/**
* Replace the first occurence of given string
*
* @param string $search a char to search in `$subject`
* @param string $replace a char to replace in `$subject`
* @param string $subject
* @return string
*
* @throws InvalidArgumentException if `$search` or `$replace` are invalid or if `$subject` is a multibytes string
*/
function str_replace_first(string $search , string $replace , string $subject) : string {
// check params
if(strlen($replace) != 1 || strlen($search) != 1) {
throw new InvalidArgumentException('$search & $replace must be char');
}elseif(mb_strlen($subject) != strlen($subject)){
throw new InvalidArgumentException('$subject is an multibytes string');
}
// search
$pos = strpos($subject, $search);
if($pos === false) {
// not found
return $subject;
}
// replace
$subject[$replace] = $subject;
return $subject;
}
Я единственный способ, который я нашел, - сделать его программным, как код ниже:
private void setContainerSize() {
LinearLayout contentContainer = getViewDataBinding().container;
Point point = SystemUtils.getScreenSize(this);
float px = SystemUtils.convertDpToPixel(getResources().getDimension(R.dimen.toolbar_size), this);
assert point != null;
ViewGroup.LayoutParams layoutParams = contentContainer.getLayoutParams();
layoutParams.height = (int)(point.getHeight() - px);
contentContainer.setLayoutParams(layoutParams);
contentContainer.requestLayout();
}
Никогда не используйте прокручиваемую прокрутку. 1. Создайте 1 вид ресайклера с разными типами представлений. 2. Добавьте на него layout_behavior.
OUTPUT
Попробуйте
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
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/scrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scrollbars="none"
android:fillViewport="true"
app:layout_constraintBottom_toTopOf="@+id/guideline"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorPrimaryDark"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_asks"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:scrollbars="none"
android:layout_weight="1"
app:layoutManager="android.support.v7.widget.LinearLayoutManager"
app:layout_constraintBottom_toTopOf="@+id/divider"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_marginBottom="@dimen/small_margin"
android:layout_above="@+id/divider"
android:background="@color/colorPrimary"/>
<View
android:id="@+id/divider"
android:layout_width="match_parent"
android:layout_height="1dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_bids"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:scrollbars="none"
android:layout_weight="1"
app:layout_constraintTop_toBottomOf="@+id/divider"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layoutManager="android.support.v7.widget.LinearLayoutManager"
android:layout_below="@+id/divider"
android:layout_marginTop="@dimen/small_margin"
android:background="@color/colorAccent"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>