安卓工作室 : Can't add Views on GridLayout. android/view/View$OnUnhandledKeyEventListener

Question

我已经为此苦苦挣扎了好几个小时。为什么会这样？我正在学习网站上的类(class)(不确定我是否可以提及)，一切都应该完美无缺，但它不适合我。 本质上，我想做的是做一个“四连胜”游戏，我想使用 GridLayout 并在其中添加 ImageViews。当我尝试将 ImageView 添加到 gridLayout 时，它们没有显示。它们“存在”，但并没有真正显示出来。 到目前为止我尝试了什么:

• 改变布局的高度和宽度
• 玩转背景，可见度
• 用谷歌搜索解决这个问题。
• 为网格布局添加垂直方向
• 再次从头开始创造一切

• “使缓存无效/重新启动...”

  Stack Trace
  
  java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener
  at org.jetbrains.android.uipreview.ModuleClassLoader.load(ModuleClassLoader.java:180)
  at com.android.tools.idea.rendering.RenderClassLoader.findClass(RenderClassLoader.java:61)
  at org.jetbrains.android.uipreview.ModuleClassLoader.findClass(ModuleClassLoader.java:118)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
  at org.jetbrains.android.uipreview.ModuleClassLoader.loadClass(ModuleClassLoader.java:213)
  at android.support.v7.widget.GridLayout.isLayoutRtlCompat(GridLayout.java:679)
  at android.support.v7.widget.GridLayout.onLayout_Original(GridLayout.java:1082)
  at android.support.v7.widget.GridLayout.onLayout(GridLayout.java)
  at android.view.View.layout_Original(View.java:19659)
  at android.view.View_Delegate.layout(View_Delegate.java:91)
  at android.view.View.layout(View.java:19645)
  at android.view.ViewGroup.layout(ViewGroup.java:6075)
  at android.support.constraint.ConstraintLayout.onLayout_Original(ConstraintLayout.java:1858)
  at android.support.constraint.ConstraintLayout.onLayout(ConstraintLayout.java)
  at android.view.View.layout_Original(View.java:19659)
  at android.view.View_Delegate.layout(View_Delegate.java:91)
  at android.view.View.layout(View.java:19645)
  at android.view.ViewGroup.layout(ViewGroup.java:6075)
  at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
  at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
  at android.view.View.layout_Original(View.java:19659)
  at android.view.View_Delegate.layout(View_Delegate.java:91)
  at android.view.View.layout(View.java:19645)
  at android.view.ViewGroup.layout(ViewGroup.java:6075)
  at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1083)
  at android.view.View.layout_Original(View.java:19659)
  at android.view.View_Delegate.layout(View_Delegate.java:91)
  at android.view.View.layout(View.java:19645)
  at android.view.ViewGroup.layout(ViewGroup.java:6075)
  at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:346)
  at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:384)
  at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:193)
  at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:544)
  at com.android.tools.idea.rendering.RenderTask.lambda$inflate$3(RenderTask.java:678)
  at java.util.concurrent.FutureTask.run(FutureTask.java:266)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  at java.lang.Thread.run(Thread.java:745)
  

  activity_main.xml

  <?xml version="1.0" encoding="utf-8"?>
  

  <android.support.v7.widget.GridLayout
      android:layout_width="368dp"
      android:layout_height="359dp"
      android:layout_marginBottom="8dp"
      android:layout_marginEnd="8dp"
      android:layout_marginStart="8dp"
      android:layout_marginTop="8dp"
      android:background="@drawable/board2"
      android:visibility="visible"
      app:columnCount="3"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toEndOf="parent"
      app:layout_constraintHorizontal_bias="0.6"
      app:layout_constraintStart_toStartOf="parent"
      app:layout_constraintTop_toTopOf="parent"
      app:layout_constraintVertical_bias="1.0"
      app:rowCount="3">
  
      <ImageView
          android:id="@+id/imageView"
          android:layout_width="50dp"
          android:layout_height="50dp"
          android:background="@drawable/red"
          android:visibility="visible"
          app:srcCompat="@drawable/red" />
  </android.support.v7.widget.GridLayout>
  

Answer 1

我是 Android 的新手，我也遇到同样的错误， 但我发现网格布局的一种简单方法是尝试使用基本 <GridLayout>标记而不是 <android.support.v7.widget.GridLayout> 便宜的方式...