Android 每个字段的约束布局必须是单独的,否则将是一个父布局
我第一次做约束布局。我有点困惑,因为屏幕上的每个组件都必须有自己的约束布局,这样它才能响应,或者我可以在父约束布局上创建,并将所有组件放在其中,它将表现为响应 我的xml目前看起来是这样的:Android 每个字段的约束布局必须是单独的,否则将是一个父布局,android,android-layout,android-constraintlayout,android-relativelayout,Android,Android Layout,Android Constraintlayout,Android Relativelayout,我第一次做约束布局。我有点困惑,因为屏幕上的每个组件都必须有自己的约束布局,这样它才能响应,或者我可以在父约束布局上创建,并将所有组件放在其中,它将表现为响应 我的xml目前看起来是这样的: <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/andr
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".LandingPage"
tools:layout_editor_absoluteY="25dp">
<android.support.constraint.ConstraintLayout
android:id="@+id/constraintLayout"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="24dp"
android:layout_marginEnd="22dp"
android:layout_marginLeft="22dp"
android:layout_marginRight="22dp"
android:layout_marginStart="22dp"
android:layout_marginTop="179dp"
app:layout_constraintBottom_toTopOf="@+id/constraintLayout2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<EditText
android:id="@+id/editText14"
android:layout_width="0dp"
android:layout_height="58dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="@drawable/edit_text_background"
android:ems="10"
android:inputType="phone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="7dp"
android:background="#ffffff"
android:text="Label"
app:layout_constraintBottom_toTopOf="@+id/editText14"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/editText14" />
</android.support.constraint.ConstraintLayout>
<android.support.constraint.ConstraintLayout
android:id="@+id/constraintLayout2"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="30dp"
android:layout_marginEnd="22dp"
android:layout_marginLeft="22dp"
android:layout_marginRight="22dp"
android:layout_marginStart="22dp"
app:layout_constraintBottom_toTopOf="@+id/constraintLayout3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/constraintLayout">
<EditText
android:id="@+id/editText12"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="@drawable/edit_text_background"
android:ems="10"
android:inputType="textPersonName"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
<android.support.constraint.ConstraintLayout
android:id="@+id/constraintLayout3"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="58dp"
android:layout_marginEnd="22dp"
android:layout_marginLeft="22dp"
android:layout_marginRight="22dp"
android:layout_marginStart="22dp"
app:layout_constraintBottom_toTopOf="@+id/constraintLayout4"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/constraintLayout2">
<EditText
android:id="@+id/editText13"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="@drawable/edit_text_background"
android:ems="10"
android:inputType="textPersonName"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
<android.support.constraint.ConstraintLayout
android:id="@+id/constraintLayout4"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="66dp"
android:layout_marginEnd="29dp"
android:layout_marginLeft="29dp"
android:layout_marginRight="29dp"
android:layout_marginStart="29dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/constraintLayout3">
<Button
android:id="@+id/button2"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="@drawable/signup_button_background"
android:text="@string/signupButton"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
所有将constraint layout作为其直接父级的布局都将支持所有约束并相应地工作,但是如果您希望对其他视图组(如CardView)中的视图设置约束,您也必须在其中指定constraint layout。对于这样的实现,请尝试此我不确定是否很好地理解您的问题,但约束布局的主要目的是在其中包含一个父级(约束布局)和所有视图,因此您只有一个层次
我给你举了一个例子:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/hubConstraintLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp"
tools:ignore="MissingPrefix">
<ImageView
android:id="@+id/hubColorImageView"
android:layout_width="36dp"
android:layout_height="36dp"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:contentDescription="@null"
app:layout_constraintBottom_toBottomOf="@+id/percentageTextView"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/titleTextView"
app:srcCompat="@drawable/bg_circle"
tools:tint="@color/blue" />
<TextView
android:id="@+id/titleTextView"
fontPath="@string/fonts_default_regular"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="8dp"
android:layout_marginStart="16dp"
android:textAllCaps="true"
app:layout_constraintEnd_toStartOf="@+id/sumTextView"
app:layout_constraintStart_toEndOf="@+id/hubColorImageView"
app:layout_constraintTop_toTopOf="parent"
tools:text="cool title" />
<TextView
android:id="@+id/sumTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="0dp"
android:paddingRight="8dp"
android:textColor="#636363"
android:textSize="15sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="@+id/titleTextView"
tools:text="54 000,00€" />
<TextView
android:id="@+id/percentageTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:textColor="@color/magnesium"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="@+id/titleTextView"
app:layout_constraintTop_toTopOf="@+id/performanceTextView"
tools:text="100,0% of contract" />
<TextView
android:id="@+id/performanceTextView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:gravity="end"
android:text=""
android:textColor="@color/magnesium"
android:textSize="12sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="@+id/percentageTextView"
app:layout_constraintTop_toBottomOf="@+id/titleTextView"
tools:text="10000,00 €" />
<TextView
android:id="@+id/permanentTransferInfoTextView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/hubColorImageView"
app:layout_constraintTop_toBottomOf="@+id/percentageTextView"
tools:text="you have lot of money" />
<ProgressBar
android:id="@+id/customBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:foreground="@android:color/transparent"
android:visibility="gone"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="@+id/permanentTransferInfoTextView"
app:layout_constraintTop_toBottomOf="@+id/permanentTransferInfoTextView"
tools:visibility="visible" />
</android.support.constraint.ConstraintLayout>
但当您像在图像视图中那样硬编码宽度和高度值时,android:layout\u width=“36dp”android:layout\u height=“36dp”。。。它会影响响应性吗?当你硬编码高度和时,如果你想有响应性,你必须将约束设置为开始和结束,或者顶部和底部,并可能尝试使用约束偏差。但是我认为发现约束布局的最佳方法是使用设计编辑器构建约束布局,对其进行一点处理,然后返回文本并查看编辑器添加的字段。我已经更新了相关的xml。我的每个元素都包含自己的约束布局。这种方法不正确吗?您应该只有一个约束是xml。只需在一个视图中添加约束,就可以按照您的需要放置所有约束。