约束布局问题java.lang.AssertionError:TOP

时间:2018-07-30 12:38:12

标签: android android-layout android-constraintlayout

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)

3 个答案:

答案 0 :(得分:7)

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。

答案 1 :(得分:3)

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" />

答案 2 :(得分:1)

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"