java Android Studio渲染器错误

Question

我创建了一个扩展线性布局的自定义视图。视图被放在一个片段中。应用程序运行良好，但是当我查看片段布局文件时，渲染器中出现异常。我已尝试向参数添加空检查&；使用@nonnull和@nullable注释，但这并不能解决问题。如果我去掉更平的线，问题就消失了

例外情况：

java.lang.IllegalArgumentException: Argument 0 for @NotNull parameter of com/安卓/tools/idea/rendering/LayoutlibCallback.getParser must not be null
at com.安卓.tools.idea.rendering.LayoutlibCallback.getParser(LayoutlibCallback.java)
at 安卓.content.res.BridgeResources.getLayout(BridgeResources.java:250)
at 安卓.view.LayoutInflater.inflate(LayoutInflater.java:412)
at com.ifit.安卓.fitprorunner.view.GraphView.init(GraphView.java:26)
at com.ifit.安卓.fitprorunner.view.GraphView.<init>(GraphView.java:17)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.jetbrains.安卓.uipreview.ViewLoader.createNewInstance(ViewLoader.java:379)
at org.jetbrains.安卓.uipreview.ViewLoader.loadView(ViewLoader.java:99)
at com.安卓.tools.idea.rendering.LayoutlibCallback.loadView(LayoutlibCallback.java:172)
at 安卓.view.BridgeInflater.loadCustomView(BridgeInflater.java:207)
at 安卓.view.BridgeInflater.createViewFromTag(BridgeInflater.java:132)
at 安卓.view.LayoutInflater.rInflate_Original(LayoutInflater.java:806)
at 安卓.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64)
at 安卓.view.LayoutInflater.rInflate(LayoutInflater.java:782)
at 安卓.view.LayoutInflater.inflate(LayoutInflater.java:504)
at 安卓.view.LayoutInflater.inflate(LayoutInflater.java:385)
at com.安卓.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:401)
at com.安卓.layoutlib.bridge.Bridge.createSession(Bridge.java:329)
at com.安卓.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
at com.安卓.tools.idea.rendering.RenderService$5.compute(RenderService.java:688)
at com.安卓.tools.idea.rendering.RenderService$5.compute(RenderService.java:677)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:932)
at com.安卓.tools.idea.rendering.RenderService.createRenderSession(RenderService.java:677)
at com.安卓.tools.idea.rendering.RenderService.render(RenderService.java:815)
at org.jetbrains.安卓.uipreview.AndroidLayoutPreviewToolWindowManager.doRender(AndroidLayoutPreviewToolWindowManager.java:611)
at org.jetbrains.安卓.uipreview.AndroidLayoutPreviewToolWindowManager.access$1900(AndroidLayoutPreviewToolWindowManager.java:81)
at org.jetbrains.安卓.uipreview.AndroidLayoutPreviewToolWindowManager$7$1.run(AndroidLayoutPreviewToolWindowManager.java:553)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:178)
at com.intellij.openapi.progress.ProgressManager.executeProcessUnderProgress(ProgressManager.java:209)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:212)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcess(ProgressManagerImpl.java:171)
at org.jetbrains.安卓.uipreview.AndroidLayoutPreviewToolWindowManager$7.run(AndroidLayoutPreviewToolWindowManager.java:548)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310)
at com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:327)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:695)

类别：

public class GraphView extends LinearLayout {

    public GraphView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    public GraphView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context, attrs);
    }

    private void init(Context context, AttributeSet attrs) {
        LayoutInflater.from(context).inflate(R.layout.graph_view, this, true);
    }
}