selectableItemBackgroundBorderless
内,则{p> View
无效,但selectableItemBackground
仍可正常工作。
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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorAccent">
<View
android:id="@+id/view"
android:layout_width="match_parent"
android:layout_height="250dp"
android:background="@color/colorPrimary"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:visibility="visible"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0" />
<android.support.v7.widget.AppCompatImageButton
android:id="@+id/previous_ib"
android:layout_width="42dp"
android:layout_height="42dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="32dp"
android:layout_marginTop="8dp"
android:background="?selectableItemBackgroundBorderless"
android:contentDescription="@string/app_name"
android:scaleType="centerInside"
android:src="@drawable/ic_action_previous"
app:layout_constraintBottom_toBottomOf="@+id/play_ib"
app:layout_constraintEnd_toStartOf="@+id/play_ib"
app:layout_constraintTop_toTopOf="@+id/play_ib" />
<android.support.v7.widget.AppCompatImageButton
android:id="@+id/play_ib"
android:layout_width="68dp"
android:layout_height="68dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="?selectableItemBackgroundBorderless"
android:contentDescription="@string/app_name"
android:scaleType="centerInside"
android:src="@drawable/ic_action_play"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/view" />
<android.support.v7.widget.AppCompatImageButton
android:id="@+id/next_ib"
android:layout_width="42dp"
android:layout_height="42dp"
android:layout_marginBottom="8dp"
android:layout_marginStart="32dp"
android:layout_marginTop="8dp"
android:background="?selectableItemBackgroundBorderless"
android:contentDescription="@string/app_name"
android:scaleType="centerInside"
android:src="@drawable/ic_action_next"
app:layout_constraintBottom_toBottomOf="@+id/play_ib"
app:layout_constraintStart_toEndOf="@+id/play_ib"
app:layout_constraintTop_toTopOf="@+id/play_ib" />
</android.support.constraint.ConstraintLayout>
答案 0 :(得分:1)
这是因为android:background="@color/colorPrimary"
中的View
。但是你真的需要这个没有任何儿童观点的观点吗?
我建议将View
替换为另一个ConstraintLayout
。只需将所有ImageButton
放入第二个ConstraintLayout
,您的问题就会消失。
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorAccent">
<android.support.constraint.ConstraintLayout
android:id="@+id/view"
android:layout_width="match_parent"
android:layout_height="250dp"
android:background="@color/colorPrimary"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:visibility="visible"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0" >
<android.support.v7.widget.AppCompatImageButton
android:id="@+id/previous_ib"
android:layout_width="42dp"
android:layout_height="42dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="32dp"
android:layout_marginTop="8dp"
android:background="?selectableItemBackgroundBorderless"
android:contentDescription="@string/app_name"
android:scaleType="centerInside"
android:src="@drawable/ic_action_previous"
app:layout_constraintBottom_toBottomOf="@+id/play_ib"
app:layout_constraintEnd_toStartOf="@+id/play_ib"
app:layout_constraintTop_toTopOf="@+id/play_ib" />
<android.support.v7.widget.AppCompatImageButton
android:id="@+id/play_ib"
android:layout_width="68dp"
android:layout_height="68dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="?selectableItemBackgroundBorderless"
android:contentDescription="@string/app_name"
android:scaleType="centerInside"
android:src="@drawable/ic_action_play"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/view" />
<android.support.v7.widget.AppCompatImageButton
android:id="@+id/next_ib"
android:layout_width="42dp"
android:layout_height="42dp"
android:layout_marginBottom="8dp"
android:layout_marginStart="32dp"
android:layout_marginTop="8dp"
android:background="?selectableItemBackgroundBorderless"
android:contentDescription="@string/app_name"
android:scaleType="centerInside"
android:src="@drawable/ic_action_next"
app:layout_constraintBottom_toBottomOf="@+id/play_ib"
app:layout_constraintStart_toEndOf="@+id/play_ib"
app:layout_constraintTop_toTopOf="@+id/play_ib" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
答案 1 :(得分:1)
通常这是一个评论,但我显然太新了。
你试过试试吗?android:foreground="?selectableItemBackgroundBorderless"
而不是
android:background="?selectableItemBackgroundBorderless"
?
答案 2 :(得分:1)
对于那些正在寻找合理答案的人,恐怕这是ConstraintLayout
:selectableItemBackground shown upon clicking, while selectableItemBackgroundBorderless isn't中的一个已知错误,因为它已经提到了here
请考虑加注星标,并在发现更多问题时进行举报。
答案 3 :(得分:1)
我用了它,对我来说很好用。
android:clickable="true"
android:focusable="true"
android:background="?android:attr/selectableItemBackground"
答案 4 :(得分:0)
在此问题解决之前,一种解决方案是使用
android:background="?actionBarItemBackground"
会产生圆形波纹效果
并且还可以在约束布局中使用。
答案 5 :(得分:0)
如果您的父视图是 ConstraintLayout
,那么请将 ImageButton
包裹在 FrameLayout
中,例如:
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="@+id/play_ib"
app:layout_constraintStart_toEndOf="@+id/play_ib"
app:layout_constraintTop_toTopOf="@+id/play_ib">
<android.support.v7.widget.AppCompatImageButton
android:id="@+id/next_ib"
android:layout_width="42dp"
android:layout_height="42dp"
android:layout_marginBottom="8dp"
android:layout_marginStart="32dp"
android:layout_marginTop="8dp"
android:background="?selectableItemBackgroundBorderless"
android:contentDescription="@string/app_name"
android:scaleType="centerInside"
android:src="@drawable/ic_action_next" />
</FrameLayout>
约束布局中显然存在一些导致这种行为的错误。如果您好奇,可以探索更多。