我有一个recyclerview，使用以下xml作为每个视图的列表项
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView 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="wrap_content"
app:cardElevation="2dp">
<android.support.constraint.ConstraintLayout android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView android:id="@+id/item_question_name"
style="?android:attr/textAppearanceLarge"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/app_margin"
app:layout_constraintBottom_toTopOf="@+id/item_question_question"
app:layout_constraintEnd_toStartOf="@+id/item_question_needs_sync"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:text="This is the name" />
<android.support.v7.widget.AppCompatImageView android:id="@+id/item_question_needs_sync"
android:layout_width="wrap_content"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="@+id/item_question_name"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="@+id/item_question_name"
app:srcCompat="@drawable/ic_sync" />
<TextView android:id="@+id/item_question_question"
style="?android:attr/textAppearanceMedium"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/app_margin"
app:layout_constraintBottom_toTopOf="@+id/item_question_type"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/item_question_name"
app:layout_constraintTop_toBottomOf="@+id/item_question_name"
tools:text="this is the question" />
<TextView android:id="@+id/item_question_type"
style="?android:attr/textAppearanceMedium"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/app_margin"
android:layout_marginTop="@dimen/app_margin"
app:layout_constraintBottom_toTopOf="@+id/item_question_separator"
app:layout_constraintEnd_toStartOf="@+id/item_question_info"
app:layout_constraintHorizontal_weight="5"
app:layout_constraintStart_toStartOf="@+id/item_question_question"
app:layout_constraintTop_toBottomOf="@+id/item_question_question"
tools:text="Four faces which are awesome" />
<TextView android:id="@+id/item_question_info"
style="?android:attr/textAppearanceSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="@+id/item_question_type"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_weight="3"
app:layout_constraintStart_toEndOf="@+id/item_question_type"
app:layout_constraintTop_toTopOf="@+id/item_question_type"
tools:text="answered ALL the questions" />
<View android:id="@+id/item_question_separator"
android:layout_width="0dp"
android:layout_height="2dp"
android:background="@color/colorAccent"
app:layout_constraintBottom_toTopOf="@+id/item_question_buttons"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/item_question_info" />
<android.support.constraint.ConstraintLayout android:id="@+id/item_question_buttons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/item_question_separator">
<Button android:id="@+id/item_question_delete"
style="?android:attr/buttonBarButtonStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="@string/item_question_button_delete"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/item_question_edit"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button android:id="@+id/item_question_edit"
style="?android:attr/buttonBarButtonStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="@string/item_question_button_edit"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintBottom_toBottomOf="@+id/item_question_delete"
app:layout_constraintEnd_toStartOf="@+id/item_question_view"
app:layout_constraintStart_toEndOf="@+id/item_question_delete"
app:layout_constraintTop_toTopOf="@+id/item_question_delete" />
<Button android:id="@+id/item_question_view"
style="?android:attr/buttonBarButtonStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="@string/item_question_button_view"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintBottom_toBottomOf="@+id/item_question_delete"
app:layout_constraintEnd_toStartOf="@+id/item_question_start"
app:layout_constraintStart_toEndOf="@+id/item_question_edit"
app:layout_constraintTop_toTopOf="@+id/item_question_delete" />
<Button android:id="@+id/item_question_start"
style="?android:attr/buttonBarButtonStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="@string/item_question_button_start"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintBottom_toBottomOf="@+id/item_question_delete"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/item_question_view"
app:layout_constraintTop_toTopOf="@+id/item_question_delete" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
</android.support.v7.widget.CardView>
我的问题是，当用户点击视图时，我让查看者切换是否会显示@ + id / item_question_buttons：
void bind_view(Info info, boolean selected) {
//load the data from info
.....
// _buttons is a View object where I stored the constraint layout with the buttons
if (selected) {
_buttons.setVisibility(VISIBLE);
} else {
_buttons.setVisibility(GONE);
}
}
我的问题是，每隔一次（即第2个第4个第6个等）用户切换_buttons的可见性查看视图扩展到正常大小的三倍（这与按钮可以具有的最大高度相同）。
我通过使用android解决了它：maxLines =“1”但是我在徘徊，为什么会发生这种情况？并且有更好的方法来解决这个问题吗？
提前感谢您提供的任何帮助