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Android ConstraintLayout 属性

属性说明

layout_constraintBottom_toBottomOf=""//下边对齐(parent或id)的下边

layout_constraintLeft_toLeftOf=""//左边对齐(parent或id)的左边，与layout_constraintStart_toStartOf相同

layout_constraintRight_toRightOf=""//右边对齐(parent或id)的右边，与layout_constraintEnd_toEndOf相同

layout_constraintTop_toTopOf=""//上边对齐(parent或id)的上边

<?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">

    <TextView
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_red_dark"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

layout_constraintBottom_toTopOf=""//下边对齐(parent或id)的上边

layout_constraintLeft_toRightOf=""//左边对齐(parent或id)的右边，与layout_constraintStart_toEndOf相同

layout_constraintRight_toLeftOf=""//右边对齐(parent或id)的左边，与layout_constraintEnd_toStartOf相同

layout_constraintTop_toBottomOf=""//上边对齐(parent或id)的下边

<?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">

    <TextView
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_red_dark"
        app:layout_constraintBottom_toTopOf="parent"
        app:layout_constraintLeft_toRightOf="parent"
        app:layout_constraintRight_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="parent" />

</android.support.constraint.ConstraintLayout>

layout_constraintHorizontal_bias="0.0"//水平相对左边的百分比

layout_constraintVertical_bias="0.0"//垂直相对右边的百分比

<?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">

    <TextView
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_red_dark"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.3"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.6" />

</android.support.constraint.ConstraintLayout>

layout_constraintDimensionRatio="16:9"//宽高比

<?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">

    <TextView
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_orange_dark"
        app:layout_constraintDimensionRatio="16:9"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent" />

</android.support.constraint.ConstraintLayout>

设置权重，类似LinearLayout 

<?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">

    <TextView
        android:id="@+id/tv_1"
        android:layout_width="0dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_orange_dark"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@id/tv_2" />

    <TextView
        android:id="@+id/tv_2"
        android:layout_width="0dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_green_dark"
        app:layout_constraintHorizontal_weight="2"
        app:layout_constraintLeft_toRightOf="@id/tv_1"
        app:layout_constraintRight_toLeftOf="@id/tv_3" />

    <TextView
        android:id="@+id/tv_3"
        android:layout_width="0dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_blue_dark"
        app:layout_constraintHorizontal_weight="3"
        app:layout_constraintLeft_toRightOf="@id/tv_2"
        app:layout_constraintRight_toRightOf="parent" />


    <TextView
        android:id="@+id/tv_4"
        android:layout_width="40dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_orange_dark"
        app:layout_constraintVertical_weight="1"
        app:layout_constraintTop_toBottomOf="@id/tv_1" />

    <TextView
        android:id="@+id/tv_5"
        android:layout_width="40dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_green_dark"
        app:layout_constraintVertical_weight="2"
        app:layout_constraintTop_toBottomOf="@id/tv_4"
        app:layout_constraintBottom_toTopOf="@id/tv_6"/>

    <TextView
        android:id="@+id/tv_6"
        android:layout_width="40dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_blue_dark"
        app:layout_constraintVertical_weight="3"
        app:layout_constraintTop_toBottomOf="@id/tv_5"
        app:layout_constraintBottom_toBottomOf="parent"/>

</android.support.constraint.ConstraintLayout>

 

链式style 

layout_constraintHorizontal_chainStyle=""//只需要设置第一个

<?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">

    <!-- packed -->

    <TextView
        android:id="@+id/tv_1"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:background="@android:color/holo_orange_dark"
        android:text="111"
        app:layout_constraintHorizontal_chainStyle="packed"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@id/tv_2" />

    <TextView
        android:id="@+id/tv_2"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:background="@android:color/holo_green_dark"
        android:text="111"
        app:layout_constraintLeft_toRightOf="@id/tv_1"
        app:layout_constraintRight_toLeftOf="@id/tv_3" />

    <TextView
        android:id="@+id/tv_3"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:background="@android:color/holo_blue_dark"
        android:text="111"
        app:layout_constraintLeft_toRightOf="@id/tv_2"
        app:layout_constraintRight_toRightOf="parent" />

    <!-- spread -->

    <TextView
        android:id="@+id/tv_4"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:background="@android:color/holo_orange_dark"
        android:text="111"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_chainStyle="spread"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@id/tv_5"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_5"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:background="@android:color/holo_green_dark"
        android:text="111"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@id/tv_4"
        app:layout_constraintRight_toLeftOf="@id/tv_6"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_6"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:background="@android:color/holo_blue_dark"
        android:text="111"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@id/tv_5"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <!-- spread_inside -->

    <TextView
        android:id="@+id/tv_7"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:background="@android:color/holo_orange_dark"
        android:text="111"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_chainStyle="spread_inside"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@id/tv_8" />

    <TextView
        android:id="@+id/tv_8"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:background="@android:color/holo_green_dark"
        android:text="111"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@id/tv_7"
        app:layout_constraintRight_toLeftOf="@id/tv_9" />

    <TextView
        android:id="@+id/tv_9"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:background="@android:color/holo_blue_dark"
        android:text="111"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@id/tv_8"
        app:layout_constraintRight_toRightOf="parent" />


</android.support.constraint.ConstraintLayout>

layout_constraintCircle="@id/tv_1"//相对的控件id

layout_constraintCircleAngle="180"//角度

layout_constraintCircleRadius="100dp"//半径

<?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">

    <TextView
        android:id="@+id/tv_1"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_blue_dark"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_2"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_red_dark"
        app:layout_constraintCircle="@id/tv_1"
        app:layout_constraintCircleAngle="45"
        app:layout_constraintCircleRadius="100dp" />

    <TextView
        android:id="@+id/tv_3"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_orange_dark"
        app:layout_constraintCircle="@id/tv_1"
        app:layout_constraintCircleAngle="180"
        app:layout_constraintCircleRadius="100dp" />
    <TextView
        android:id="@+id/tv_4"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:background="@android:color/holo_green_dark"
        app:layout_constraintCircle="@id/tv_1"
        app:layout_constraintCircleAngle="280"
        app:layout_constraintCircleRadius="100dp" />

</android.support.constraint.ConstraintLayout>

 

 约束控件尺寸

<?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">

    <!--约束最小和最大的尺寸-->
    <TextView
        android:id="@+id/tv_1"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_blue_dark"
        android:text=""
        app:layout_constraintBottom_toTopOf="@id/tv_2"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"

        app:layout_constraintHeight_default="wrap"
        app:layout_constraintHeight_max="80dp"
        app:layout_constraintHeight_min="32dp"

        app:layout_constraintWidth_default="wrap"
        app:layout_constraintWidth_max="200dp"
        app:layout_constraintWidth_min="32dp"

        />

    <!--填满控件最大的尺寸-->
    <TextView
        android:id="@+id/tv_2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_blue_dark"
        android:text="1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111"
        app:layout_constraintBottom_toTopOf="@id/tv_3"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@id/tv_1"

        app:layout_constraintHeight_default="spread"
        app:layout_constraintHeight_max="80dp"

        app:layout_constraintWidth_default="spread"
        app:layout_constraintWidth_max="200dp"

        />

    <!--按照百分比设置控件的尺寸-->
    <TextView
        android:id="@+id/tv_3"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_blue_dark"
        android:text="12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@id/tv_2"

        app:layout_constraintHeight_default="percent"
        app:layout_constraintHeight_percent="0.2"

        app:layout_constraintWidth_default="percent"
        app:layout_constraintWidth_percent="0.6"

        />

</android.support.constraint.ConstraintLayout>

 

 layout_constraintBaseline_toBaselineOf="@id/tv_1"//对齐文字

<?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">

    <TextView
        android:id="@+id/tv_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@android:color/holo_blue_dark"
        android:paddingTop="40dp"
        android:paddingBottom="16dp"
        android:text="111111111111111"
        app:layout_constraintRight_toLeftOf="@id/tv_2" />

    <TextView
        android:id="@+id/tv_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="64dp"
        android:background="@android:color/holo_orange_dark"
        android:text="22222222"
        app:layout_constraintBaseline_toBaselineOf="@id/tv_1"
        app:layout_constraintLeft_toRightOf="@id/tv_1" />

</android.support.constraint.ConstraintLayout>

 

 layout_goneMarginTop="40dp"//前一个视图gone，当前视图goneMargin才会生效

<?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">

    <!--第二个视图gone，第三个视图goneMarginTop才会生效-->
    <TextView
        android:id="@+id/tv_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@android:color/holo_blue_dark"
        android:text="111111111111111"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@android:color/holo_blue_dark"
        android:text="2222"
        android:visibility="gone"
        app:layout_constraintLeft_toRightOf="@id/tv_1"
        app:layout_constraintTop_toBottomOf="@id/tv_1" />

    <TextView
        android:id="@+id/tv_3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@android:color/holo_blue_dark"
        android:text="33333"
        app:layout_constraintLeft_toRightOf="@id/tv_2"
        app:layout_constraintTop_toBottomOf="@id/tv_2"
        app:layout_goneMarginTop="40dp" />

</android.support.constraint.ConstraintLayout>

 

Barrier

constraint_referenced_ids="tv_1,tv_2"//参照多个控件的id，逗号隔开

barrierDirection="end"//相对于参照控件的位置

<?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">

    <TextView
        android:id="@+id/tv_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="8dp"
        android:text="111" />

    <TextView
        android:id="@+id/tv_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="8dp"
        android:text="2222222"
        app:layout_constraintTop_toBottomOf="@id/tv_1" />

    <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="tv_1,tv_2" />

    <TextView
        android:id="@+id/tv_3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="8dp"
        android:text="3333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333"
        app:layout_constraintStart_toEndOf="@id/barrier" />

</android.support.constraint.ConstraintLayout>

Guideline

layout_constraintGuide_percent="0.7"//距离左上的位置（百分比）

layout_constraintGuide_begin="320dp"//距离左上的位置

layout_constraintGuide_end="320dp"//距离右下的位置

<?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.support.constraint.Guideline
        android:id="@+id/guideline1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.3" />

    <android.support.constraint.Guideline
        android:id="@+id/guideline2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_begin="320dp" />

</android.support.constraint.ConstraintLayout>

 

悦读

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