我正在制作需要滚动的屏幕，因此我在Constrainlayout中使用Nestedscrollview。
这是我的Xml代码：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
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"
android:layout_gravity="fill_vertical"
android:fillViewport="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<android.support.constraint.ConstraintLayout x
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"
android:background="@android:color/white"
android:orientation="vertical">
<android.support.v7.widget.AppCompatImageView
android:id="@+id/ivlogo"
android:layout_width="0dp"
android:layout_height="140dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/artizen"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
<android.support.v7.widget.AppCompatTextView
android:id="@+id/txt_welcomeback"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginTop="5dp"
android:text="@string/welcome_back"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/txt_Login"
app:layout_constraintHorizontal_bias="0.49"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/ivlogo"
app:layout_constraintVertical_bias="0.48000002"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
<android.support.v7.widget.AppCompatTextView
android:id="@+id/txt_Login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:text="@string/login_account"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/ivlogo"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
<android.support.design.widget.TextInputLayout
android:id="@+id/textInputLayout"
android:layout_width="0dp"
android:layout_height="48dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="30dp"
android:textColorHint="@color/aluminum"
android:theme="@style/EditTextHint"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txt_Login"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1">
<android.support.v7.widget.AppCompatEditText
android:id="@+id/edEmail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:hint="@string/email"
android:inputType="textEmailAddress"
android:singleLine="true"
android:textSize="15sp"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp" />
< /android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="@+id/textInputLayoutpassword"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="30dp"
android:textColorHint="@color/aluminum"
android:theme="@style/EditTextHint"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1">
<android.support.v7.widget.AppCompatEditText
android:id="@+id/edpassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:hint="@string/password"
android:inputType="textEmailAddress"
android:singleLine="true"
android:textSize="15sp"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp" />
</android.support.design.widget.TextInputLayout>
<android.support.v7.widget.AppCompatButton
android:id="@+id/button_login"
android:layout_width="0dp"
android:layout_height="48dp"
android:layout_marginTop="40dp"
android:background="@color/dark_yellow"
android:text="@string/Log_in"
android:textColor="@android:color/white"
android:textStyle="bold"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/textInputLayoutpassword"
app:layout_constraintRight_toRightOf="@+id/textInputLayoutpassword"
app:layout_constraintTop_toBottomOf="@+id/textInputLayoutpassword"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
<android.support.v7.widget.AppCompatTextView
android:id="@+id/txt_orlogin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="@string/or_login"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button_login"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1" />
<android.support.v7.widget.AppCompatImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="120dp"
android:layout_marginStart="120dp"
android:src="@drawable/facebook_icon"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="@+id/txt_Login"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1" />
<android.support.v7.widget.AppCompatImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="120dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:srcCompat="@drawable/ic_twitter"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintRight_creator="1" />
<android.support.constraint.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="20dp"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="20dp" />
<android.support.constraint.Guideline
android:id="@+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.055555556"
tools:layout_editor_absoluteX="20dp"
tools:layout_editor_absoluteY="0dp" />
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>
最佳答案
确保ScrollView/NestedScrollView仅有一个直子。
尝试这样的事情：
<android.support.v4.widget.NestedScrollView
....
.....>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<FrameLayout
......>
<!--Your entire content-->
........
</FrameLayout>
</ScrollView>
</android.support.constraint.ConstraintLayout>
关于android - NestedScrollView在ConstraintLayout中不起作用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/42919304/