ANDROID：ConstraintLayout：layout_constraintVertical_bias 未按预期工作

Question

所以我正在尝试了解新的 ConstraintLayout 内容，作为 iOS 开发人员，一切似乎都还不错。

这是我的看法

我想要做的是让 4 个正方形在垂直轴上的尺寸略有不同（所以粉色 60%，蓝色低于 40%，右边蓝色 40%，黑色 60%）

继续阅读 layout_constraintVertical_bias，这应该可以满足我的要求，但它似乎什么也没做

<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">

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/left_guideline"
        android:orientation="vertical"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="58dp"
        app:layout_constraintGuide_percent="0.16111112" />

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/right_guideline"
        app:layout_constraintGuide_percent="0.85"
        android:orientation="vertical"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="306dp" />

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/bottom_guideline"
        app:layout_constraintGuide_percent="0.85"
        android:orientation="horizontal"
        tools:layout_editor_absoluteY="434dp"
        tools:layout_editor_absoluteX="0dp" />

    <ImageButton
        android:id="@+id/yourStoryButton"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="@+id/left_guideline"
        app:layout_constraintRight_toLeftOf="@+id/right_guideline"
        app:layout_constraintTop_toTopOf="@+id/bottom_guideline"
        app:layout_constraintVertical_bias="0.0" />

    <ImageButton
        style="?android:attr/borderlessButtonStyle"
        android:padding="0dp"
        android:id="@+id/leftTopButton"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/leftBottomButton"
        app:layout_constraintLeft_toRightOf="@+id/left_main_guideline"
        app:layout_constraintRight_toLeftOf="@+id/rightTopButton"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.6"
        app:srcCompat="@color/colorAccent" />

    <ImageButton
        style="?android:attr/borderlessButtonStyle"
        android:padding="0dp"
        android:id="@+id/rightTopButton"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/rightBottomButton"
        app:layout_constraintLeft_toRightOf="@+id/leftTopButton"
        app:layout_constraintRight_toLeftOf="@+id/right_main_guideline"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.4"
        app:srcCompat="@color/colorPrimary" />

    <ImageButton
        style="?android:attr/borderlessButtonStyle"
        android:padding="0dp"
        android:id="@+id/leftBottomButton"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/bottom_guideline"
        app:layout_constraintTop_toBottomOf="@+id/leftTopButton"
        app:layout_constraintLeft_toRightOf="@+id/left_main_guideline"
        app:layout_constraintRight_toLeftOf="@+id/rightBottomButton"
        app:layout_constraintVertical_bias="0.4"
        app:srcCompat="@color/colorPrimaryDark" />

    <ImageButton
        android:id="@+id/rightBottomButton"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:padding="0dp"
        app:layout_constraintBottom_toTopOf="@+id/bottom_guideline"
        app:layout_constraintLeft_toRightOf="@+id/leftBottomButton"
        app:layout_constraintRight_toLeftOf="@+id/right_main_guideline"
        app:layout_constraintTop_toBottomOf="@+id/rightTopButton"
        app:layout_constraintVertical_bias="0.6"

        app:srcCompat="@android:color/background_dark" />

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/left_main_guideline"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.0"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="0dp" />

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/right_main_guideline"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="1.0"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="360dp" />

</android.support.constraint.ConstraintLayout>

我是否错误地认为 app:layout_constraintVertical_bias 控制着该视图的增长百分比（就像权重一样）

Answer 1

所以，我仍然对 layout_constraintVertical_bias 应该做什么感到困惑，但是 app:layout_constraintVertical_weight 做了我期望 layout_constraintVertical_bias 做的事情

<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">

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/left_guideline"
        android:orientation="vertical"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="58dp"
        app:layout_constraintGuide_percent="0.16111112" />

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/right_guideline"
        app:layout_constraintGuide_percent="0.85"
        android:orientation="vertical"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="306dp" />

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/bottom_guideline"
        app:layout_constraintGuide_percent="0.85"
        android:orientation="horizontal"
        tools:layout_editor_absoluteY="434dp"
        tools:layout_editor_absoluteX="0dp" />

    <ImageButton
        android:id="@+id/yourStoryButton"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="@+id/left_guideline"
        app:layout_constraintRight_toLeftOf="@+id/right_guideline"
        app:layout_constraintTop_toTopOf="@+id/bottom_guideline"
        app:layout_constraintVertical_bias="0.0" />

    <ImageButton
        style="?android:attr/borderlessButtonStyle"
        android:padding="0dp"
        android:id="@+id/leftTopButton"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/leftBottomButton"
        app:layout_constraintLeft_toRightOf="@+id/left_main_guideline"
        app:layout_constraintRight_toLeftOf="@+id/rightTopButton"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_weight="0.6"
        app:srcCompat="@color/colorAccent" />

    <ImageButton
        android:id="@+id/rightTopButton"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:padding="0dp"
        app:layout_constraintBottom_toTopOf="@+id/rightBottomButton"
        app:layout_constraintLeft_toRightOf="@+id/leftTopButton"
        app:layout_constraintRight_toLeftOf="@+id/right_main_guideline"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_weight="0.4"
        app:srcCompat="@android:color/holo_orange_dark" />

    <ImageButton
        style="?android:attr/borderlessButtonStyle"
        android:padding="0dp"
        android:id="@+id/leftBottomButton"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/bottom_guideline"
        app:layout_constraintTop_toBottomOf="@+id/leftTopButton"
        app:layout_constraintLeft_toRightOf="@+id/left_main_guideline"
        app:layout_constraintRight_toLeftOf="@+id/rightBottomButton"
        app:layout_constraintVertical_weight="0.4"
        app:srcCompat="@color/colorPrimaryDark" />

    <ImageButton
        android:id="@+id/rightBottomButton"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:padding="0dp"
        app:layout_constraintBottom_toTopOf="@+id/bottom_guideline"
        app:layout_constraintLeft_toRightOf="@+id/leftBottomButton"
        app:layout_constraintRight_toLeftOf="@+id/right_main_guideline"
        app:layout_constraintTop_toBottomOf="@+id/rightTopButton"
        app:layout_constraintVertical_weight="0.6"
        app:srcCompat="@android:color/background_dark" />

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/left_main_guideline"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.0"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="0dp" />

    <android.support.constraint.Guideline
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/right_main_guideline"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="1.0"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="360dp" />

</android.support.constraint.ConstraintLayout>

Answer 2

而不是设置 layout_constraintVertical_bias 设置这个 layout_constraintVertical_weight

Answer 3

要使其正常工作，您还应该指定 chainStyle

app:layout_constraintVertical_chainStyle="packed"

ANDROID：ConstraintLayout：layout_constraintVertical_bias 未按预期工作

ANDROID : ConstraintLayout : layout_constraintVertical_bias not working as expected

android

android-constraintlayout