ConstraintLayout 在蓝图模式之外无法正确呈现 [英] ConstraintLayout does not render correctly outside blueprint mode

问题描述

我今天开始使用 Android Studio 2.2 和 ConstraintLayout，但我在渲染方面遇到了一些问题.使用蓝图模式时一切正常.使用设计模式时，对象卡在左上角全部混在一起.

I started using Android Studio 2.2 and ConstraintLayout today, but I'm having some issues with the rendering. When using Blueprint Mode everything appears fine. When using Design Mode, the objects are stuck at the top left corner all mashed together.

Android Studio 警告:onMeasure 错误

Android Studio warning: onMeasure error

java.lang.NoSuchMethodError: android.support.constraint.solver.widgets.ConstraintWidget.immediateConnect(Landroid/support/constraint/solver/widgets/ConstraintAnchor$Type;Landroid/support/constraint/solver/widgets/ConstraintWidget;Landroid/support/constraint/solver/widgets/ConstraintAnchor$Type;II)V
    at android.support.constraint.ConstraintLayout.setChildrenConstraints(ConstraintLayout.java:517)
    at android.support.constraint.ConstraintLayout.updateHierarchy(ConstraintLayout.java:433)
    at android.support.constraint.ConstraintLayout.onMeasure_Original(ConstraintLayout.java:728)
    at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java)
    at android.view.View.measure(View.java:19731)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)
    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
    at android.view.View.measure(View.java:19731)
    at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)
    at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
    at android.view.View.measure(View.java:19731)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.measureView(RenderSessionImpl.java:545)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:342)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:429)
    at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:389)
    at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:548)
    at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:533)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:966)
    at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:533)
    at com.android.tools.idea.rendering.RenderTask.lambda$inflate$72(RenderTask.java:659)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

依赖:

compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha8'

这是 Android Studio 中无法解决的错误还是可以解决的问题?SDK 已更新.

Is this an unsolvable error in Android Studio or is there something that is solvable? SDK is updated.

编辑

XML 文件:

<?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:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:src="@drawable/about"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imageView6"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginLeft="16dp" />

    <TextView
        android:text="TextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textView33"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toRightOf="@+id/imageView6"
        android:layout_marginLeft="16dp" />

    <TextView
        android:text="TextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textView34"
        app:layout_constraintRight_toRightOf="@+id/textView33"
        android:layout_marginTop="8dp"
        app:layout_constraintTop_toBottomOf="@+id/textView33" />
</android.support.constraint.ConstraintLayout>

推荐答案

如这里提到的约束布局 Alpha8 发行说明

注意:由于 API 更改，您可能需要在升级到 alpha 8 后重新启动 Android Studio 2.2 才能进行布局预览.

Note: due to API change, you might have to restart Android Studio 2.2 after upgrading to alpha 8 for layout preview to work.

so 从菜单栏中，选择 file 并选择 invalidate caches/restart

so From the menu bar, select file and choose invalidate caches / restart

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