Question

我使用Android Studio版本2.2.3。我制作了只包含50个按钮的简单xml代码。但是当我尝试查看预览时，我遇到了渲染问题。但是，它通常在我的智能手机设备中运行。我改变了API，主题，但它们没有用。我下载了Android SDK：Android 4.2, 4.3, 5.0, 5.1, 6.0, 7.0, 7.1.1 这是错误信息： -

 java.lang.NullPointerException
    at android.graphics.Paint_Delegate.reset(Paint_Delegate.java:1238)
    at android.graphics.Paint_Delegate.<init>(Paint_Delegate.java:1179)
    at android.graphics.Paint_Delegate.nInit(Paint_Delegate.java:675)
    at android.graphics.Paint.nInit(Paint.java)
    at android.graphics.Paint.<init>(Paint.java:457)
    at android.graphics.drawable.ColorDrawable.<init>(ColorDrawable.java:47)
    at com.android.layoutlib.bridge.impl.ResourceHelper.getDrawable(ResourceHelper.java:357)
    at com.android.layoutlib.bridge.impl.ResourceHelper.getDrawable(ResourceHelper.java:262)
    at com.android.layoutlib.bridge.impl.Layout.<init>(Layout.java:125)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:301)
    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$70(RenderTask.java:659)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

Android Studio渲染问题：java.lang.NullPointerException

0 个答案: