Barrier 未在约束布局中设置为 referenceIds？
Barrier doesn't set to referenceIds in constraint layout?
嘿，最近几天我正在探索约束 layout.the 障碍的概念，我可以理解，但是当我实施时，我无法获得正确的输出。
我想在正确的方向设置障碍以引用 ID。但是 barrier 不 work.it 应该为 nameLabel 和 passionLabel 的视图设置。请帮我。先感谢您。这是 current output
<?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/activity_main_barriers"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:fontFamily="@font/roboto_bold"
android:text="@string/barriers"
android:textColor="@color/black"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="@+id/header"
android:layout_width="0dp"
android:layout_height="149dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="@drawable/arun"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:fontFamily="@font/roboto_bold"
android:text="Arun Pandian"
android:textColor="@color/colorPrimaryDark"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.032"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/header" />
<!--@string/hobbies-->
<TextView
android:id="@+id/passionLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:labelFor="@+id/etPassion"
android:text="@string/passion"
android:textColor="@color/colorPrimaryDark"
android:textSize="15sp"
app:layout_constraintBaseline_toBaselineOf="@+id/etPassion"
app:layout_constraintStart_toStartOf="@+id/nameLabel" />
<TextView
android:id="@+id/nameLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:fontFamily="@font/roboto_italic"
android:labelFor="@+id/cameraType"
android:text="@string/name"
android:textColor="@color/colorPrimaryDark"
android:textSize="15sp"
app:layout_constraintBaseline_creator="1"
app:layout_constraintBaseline_toBaselineOf="@+id/etName"
app:layout_constraintLeft_creator="1"
app:layout_constraintStart_toStartOf="@+id/title"
app:layout_editor_absoluteX="16dp"
app:layout_editor_absoluteY="189dp"
tools:layout_constraintBaseline_creator="0"
tools:layout_constraintLeft_creator="0" />
<EditText
android:id="@+id/etPassion"
android:layout_width="217dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Developing softwares"
app:layout_constraintEnd_toEndOf="@+id/etName"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="@+id/etName"
app:layout_constraintTop_toBottomOf="@+id/etName"
app:layout_editor_absoluteX="73dp"
app:layout_editor_absoluteY="225dp"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="0" />
<EditText
android:id="@+id/etName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="148dp"
android:inputType="textPersonName"
android:text="Arun Pandian"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/tvName"
app:layout_constraintTop_toBottomOf="@+id/title"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="0" />
<android.support.constraint.Barrier
android:id="@+id/barrier"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:barrierDirection="end"
app:constraint_referenced_ids="nameLabel,passionLabel"
tools:layout_editor_absoluteX="411dp" />
</android.support.constraint.ConstraintLayout>
Try this:
you have to give both edittext start constraint to barrier.
Also when I see in My android studio xml my output is same as you post in your question image. check http://prntscr.com/mkdtgb
But when I see in device it's working
<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/activity_main_barriers"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:text="barriers"
android:textColor="@android:color/black"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="@+id/header"
android:layout_width="0dp"
android:layout_height="149dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<TextView
android:id="@+id/title"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="15dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:text="Arun Pandian"
android:textColor="@color/colorPrimaryDark"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/header" />
<!--@string/hobbies-->
<TextView
android:id="@+id/passionLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:labelFor="@+id/etPassion"
android:text="passios"
android:textColor="@color/colorPrimaryDark"
android:textSize="15sp"
app:layout_constraintBaseline_toBaselineOf="@+id/etPassion"
app:layout_constraintStart_toStartOf="@+id/nameLabel" />
<EditText
android:id="@+id/etPassion"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:ems="10"
android:inputType="textPersonName"
android:layout_marginStart="16dp"
android:text="Developing softwares"
app:layout_constraintEnd_toEndOf="@+id/etName"
app:layout_constraintStart_toEndOf="@+id/barrier2"
app:layout_constraintTop_toBottomOf="@+id/etName" />
<TextView
android:id="@+id/nameLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:labelFor="@+id/cameraType"
android:text="namegfhfgdfgdfgdfgdfgdfgdf"
android:textColor="@color/colorPrimaryDark"
android:textSize="15sp"
app:layout_constraintBaseline_toBaselineOf="@+id/etName"
app:layout_constraintStart_toStartOf="parent" />
<EditText
android:id="@+id/etName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:inputType="textPersonName"
android:text="Arun Pandian"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/barrier2"
app:layout_constraintTop_toBottomOf="@+id/title" />
<android.support.constraint.Barrier
android:id="@+id/barrier2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:barrierDirection="end"
app:constraint_referenced_ids="nameLabel,passionLabel" />
</android.support.constraint.ConstraintLayout>
我通过更新 ConstraintLayout 库解决了这个问题
来自
implementation 'com.android.support.constraint:constraint-layout:2.0.0-alpha2'
对此
implementation 'com.android.support.constraint:constraint-layout:2.0.0-alpha3'
我在使用
时遇到了类似的问题
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
相同的代码在一个项目中有效，但在另一个项目中无效，两者都使用相同版本的约束布局
如果它在设备上有效但在布局编辑器中无效，则尝试在编辑器中强制刷新布局
这似乎是 Android Studio 3.3 预览版中的渲染错误。
障碍将在模拟器上运行时运行。
嘿，最近几天我正在探索约束 layout.the 障碍的概念，我可以理解，但是当我实施时，我无法获得正确的输出。
我想在正确的方向设置障碍以引用 ID。但是 barrier 不 work.it 应该为 nameLabel 和 passionLabel 的视图设置。请帮我。先感谢您。这是 current output
<?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/activity_main_barriers"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:fontFamily="@font/roboto_bold"
android:text="@string/barriers"
android:textColor="@color/black"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="@+id/header"
android:layout_width="0dp"
android:layout_height="149dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="@drawable/arun"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:fontFamily="@font/roboto_bold"
android:text="Arun Pandian"
android:textColor="@color/colorPrimaryDark"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.032"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/header" />
<!--@string/hobbies-->
<TextView
android:id="@+id/passionLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:labelFor="@+id/etPassion"
android:text="@string/passion"
android:textColor="@color/colorPrimaryDark"
android:textSize="15sp"
app:layout_constraintBaseline_toBaselineOf="@+id/etPassion"
app:layout_constraintStart_toStartOf="@+id/nameLabel" />
<TextView
android:id="@+id/nameLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:fontFamily="@font/roboto_italic"
android:labelFor="@+id/cameraType"
android:text="@string/name"
android:textColor="@color/colorPrimaryDark"
android:textSize="15sp"
app:layout_constraintBaseline_creator="1"
app:layout_constraintBaseline_toBaselineOf="@+id/etName"
app:layout_constraintLeft_creator="1"
app:layout_constraintStart_toStartOf="@+id/title"
app:layout_editor_absoluteX="16dp"
app:layout_editor_absoluteY="189dp"
tools:layout_constraintBaseline_creator="0"
tools:layout_constraintLeft_creator="0" />
<EditText
android:id="@+id/etPassion"
android:layout_width="217dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Developing softwares"
app:layout_constraintEnd_toEndOf="@+id/etName"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="@+id/etName"
app:layout_constraintTop_toBottomOf="@+id/etName"
app:layout_editor_absoluteX="73dp"
app:layout_editor_absoluteY="225dp"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="0" />
<EditText
android:id="@+id/etName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="148dp"
android:inputType="textPersonName"
android:text="Arun Pandian"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/tvName"
app:layout_constraintTop_toBottomOf="@+id/title"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="0" />
<android.support.constraint.Barrier
android:id="@+id/barrier"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:barrierDirection="end"
app:constraint_referenced_ids="nameLabel,passionLabel"
tools:layout_editor_absoluteX="411dp" />
</android.support.constraint.ConstraintLayout>
Try this: you have to give both edittext start constraint to barrier.
Also when I see in My android studio xml my output is same as you post in your question image. check http://prntscr.com/mkdtgb
But when I see in device it's working
<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/activity_main_barriers"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:text="barriers"
android:textColor="@android:color/black"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="@+id/header"
android:layout_width="0dp"
android:layout_height="149dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<TextView
android:id="@+id/title"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="15dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:text="Arun Pandian"
android:textColor="@color/colorPrimaryDark"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/header" />
<!--@string/hobbies-->
<TextView
android:id="@+id/passionLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:labelFor="@+id/etPassion"
android:text="passios"
android:textColor="@color/colorPrimaryDark"
android:textSize="15sp"
app:layout_constraintBaseline_toBaselineOf="@+id/etPassion"
app:layout_constraintStart_toStartOf="@+id/nameLabel" />
<EditText
android:id="@+id/etPassion"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:ems="10"
android:inputType="textPersonName"
android:layout_marginStart="16dp"
android:text="Developing softwares"
app:layout_constraintEnd_toEndOf="@+id/etName"
app:layout_constraintStart_toEndOf="@+id/barrier2"
app:layout_constraintTop_toBottomOf="@+id/etName" />
<TextView
android:id="@+id/nameLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:labelFor="@+id/cameraType"
android:text="namegfhfgdfgdfgdfgdfgdfgdf"
android:textColor="@color/colorPrimaryDark"
android:textSize="15sp"
app:layout_constraintBaseline_toBaselineOf="@+id/etName"
app:layout_constraintStart_toStartOf="parent" />
<EditText
android:id="@+id/etName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:inputType="textPersonName"
android:text="Arun Pandian"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/barrier2"
app:layout_constraintTop_toBottomOf="@+id/title" />
<android.support.constraint.Barrier
android:id="@+id/barrier2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:barrierDirection="end"
app:constraint_referenced_ids="nameLabel,passionLabel" />
</android.support.constraint.ConstraintLayout>
我通过更新 ConstraintLayout 库解决了这个问题
来自
implementation 'com.android.support.constraint:constraint-layout:2.0.0-alpha2'
对此
implementation 'com.android.support.constraint:constraint-layout:2.0.0-alpha3'
我在使用
时遇到了类似的问题implementation 'com.android.support.constraint:constraint-layout:1.1.3'
相同的代码在一个项目中有效，但在另一个项目中无效，两者都使用相同版本的约束布局
如果它在设备上有效但在布局编辑器中无效，则尝试在编辑器中强制刷新布局
这似乎是 Android Studio 3.3 预览版中的渲染错误。 障碍将在模拟器上运行时运行。