Question

我开始使用约束布局，在仅编译设计文件时遇到断言错误，将发生此问题。解决此问题的正确方法是什么？我搞砸了一天。这是我的XML设计。

<?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/cL_Layout"
    android:layout_width="match_parent"
    android:layout_height="80dp"
    android:background="@color/card_background">

    <android.support.constraint.Guideline
        android:id="@+id/gL_right_margin"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.95" />

    <android.support.constraint.Guideline
        android:id="@+id/gL_vertical_center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.50364965" />
    <android.support.constraint.Guideline
        android:id="@+id/gL_bottom_margin"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="1.0" />

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


    <ImageView
        android:id="@+id/imgVw_AddClips_recVw_icon"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="4dp"
        android:layout_marginStart="4dp"
        android:layout_marginTop="4dp"
        android:adjustViewBounds="true"
        android:background="@drawable/qik_highlights_shape"
        android:contentDescription="@string/dummy_content"
        android:scaleType="fitCenter"
        android:src="@drawable/bg_cloud_icon"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/gL_image_size_margin"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


    <com.ibot.cyranoapp.customview.TextViewFont
        android:id="@+id/txtIp_recVw_AddClips_Name_title"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:text="@string/recVw_Template_channel"
        android:textAllCaps="false"
        android:textColor="@color/fa_preview_button_text_grey"
        android:textSize="14sp"
        android:textStyle="bold"
        app:layout_constraintStart_toEndOf="@+id/gL_image_size_margin"
        app:layout_constraintTop_toTopOf="parent" />


    <com.ibot.cyranoapp.customview.TextViewFont
        android:id="@+id/txtIp_recVw_Components_Name_title"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_marginStart="8dp"
        android:text="@string/recVw_Template_Components"
        android:textAllCaps="false"
        android:textColor="@color/fa_preview_button_text_grey"
        android:textSize="12sp"
        app:layout_constraintStart_toEndOf="@+id/gL_image_size_margin"
        app:layout_constraintTop_toBottomOf="@+id/txtIp_recVw_AddClips_Name_title" />

    <com.ibot.cyranoapp.customview.TextViewFont
        android:id="@+id/txtIp_recVw_channel_subscribers_hint"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="@string/channel_subscribers"
        android:textAllCaps="false"
        android:textColor="@color/fa_preview_button_text_grey"
        android:textSize="12sp"
        app:layout_constraintStart_toEndOf="@+id/gL_image_size_margin"
        app:layout_constraintTop_toBottomOf="@+id/txtIp_recVw_Components_Name_title" />


    <RadioButton
        android:id="@+id/rBtn_AddClips_SelectionIcon"
        android:layout_width="20dp"
        android:layout_height="20dp"
        android:layout_marginBottom="8dp"
        android:layout_marginTop="8dp"
        android:button="@drawable/qik_checkbox"
        android:text="@null"
        android:theme="@null"
        app:layout_constraintBottom_toTopOf="@+id/gL_bottom_margin"
        app:layout_constraintEnd_toStartOf="@+id/gL_right_margin"
        app:layout_constraintTop_toTopOf="parent" />

    <View
        android:id="@+id/view_template_1"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="@color/fa_preview_button_text_grey"
        android:visibility="gone"
        app:layout_constraintBottom_toTopOf="@+id/gL_right_margin"
        app:layout_constraintEnd_toEndOf="@+id/gL_right_margin" />

    <View
        android:id="@+id/view_template_selection"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/fa_green_1"
        app:layout_constraintBottom_toBottomOf="@+id/view_template_1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

我的错误记录在这里：

java.lang.AssertionError：TOP 在android.support.constraint.solver.widgets.Guideline.getAnchor（Guideline.java:159）在android.support.constraint.solver.widgets.ConstraintWidget.immediateConnect（ConstraintWidget.java:1597）在android.support.constraint.ConstraintLayout.setChildrenConstraints（ConstraintLayout.java:1031）在android.support.constraint.ConstraintLayout.updateHierarchy（ConstraintLayout.java:794）在android.support.constraint.ConstraintLayout.onMeasure（ConstraintLayout.java:1542）在android.view.View.measure（View.java:21051）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6459）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在android.support.v7.widget.ContentFrameLayout.onMeasure（ContentFrameLayout.java:141）在android.view.View.measure（View.java:21051）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6459）在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1464）在android.widget.LinearLayout.measureVertical（LinearLayout.java:758）在android.widget.LinearLayout.onMeasure（LinearLayout.java:640）在android.view.View.measure（View.java:21051）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6459）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在android.view.View.measure（View.java:21051）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6459）在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1464）在android.widget.LinearLayout.measureVertical（LinearLayout.java:758）在android.widget.LinearLayout.onMeasure（LinearLayout.java:640）在android.view.View.measure（View.java:21051）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6459）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在com.android.internal.policy.DecorView.onMeasure（DecorView.java:849）在android.view.View.measure（View.java:21051）在android.view.ViewRootImpl.performMeasure（ViewRootImpl.java:2583）在android.view.ViewRootImpl.measureHierarchy（ViewRootImpl.java:1642）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1893）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1522）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:7098）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:927）在android.view.Choreographer.doCallbacks（Choreographer.java:702）在android.view.Choreographer.doFrame（Choreographer.java:638）在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:913）在android.os.Handler.handleCallback（Handler.java:751）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6682）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1520）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1410）

Answer 1

使用垂直参考线时，任何受其限制的视图都应水平执行，而对于水平参考线也应如此。

您的情况是，您将Makefile垂直限制为垂直准则，因此请更改此内容：

view_template_1

根据水平准则

始终检查布局，并确保在准则中添加适当的约束。

Answer 2

我丢失了android:orientation="horizontal"中的android:orientation="vertical" / GuideLine标签。确保已正确添加。

最后，它应该看起来像这样

<androidx.constraintlayout.widget.Guideline
        android:id="@+id/gl_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintBottom_toBottomOf="@id/cv_rank_status"
        app:layout_constraintGuide_percent="0.3"
        app:layout_constraintTop_toTopOf="@id/cv_rank_status" />

Answer 3

尝试从参考指南中删除加号。例如这里app:layout_constraintEnd_toStartOf="@+id/gL_image_size_margin"

约束布局问题java.lang.AssertionError：TOP

3 个答案: