android.support.v7.widget.RecyclerView无法实例化

Question

我在eclipse中为API 15-21创建了一个Android应用程序项目.

我导入了appCompat v7,cardView和recyclerView的库,但是在我的XML中添加了recyclelerView,它给android.support.v7.widget.RecyclerView无法实例化.

我有最新的SDK和更新的库.

java.lang.UnsupportedOperationException: Unsupported Service: accessibility
at com.android.layoutlib.bridge.android.BridgeContext.getSystemService(BridgeContext.java:465)
at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:290)
at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:266)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.instantiateClass(ProjectCallback.java:442)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.loadView(ProjectCallback.java:194)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:207)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:132)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:806)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:782)
at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
at android.view.LayoutInflater.inflate(LayoutInflater.java:385)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:401)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:329)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:332)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderService.createRenderSession(RenderService.java:517)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1584)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1309)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$ReloadListener.reloadLayoutSwt(GraphicalEditorPart.java:1817)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$ReloadListener.access$0(GraphicalEditorPart.java:1755)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$ReloadListener$1.run(GraphicalEditorPart.java:1749)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:136)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4147)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3764)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)

Answer 1

此问题最终在API Level 22 SDK Manager和RecyclerView支持库中得到修复.要在相关的Android问题(已于2015年3月11日结束)中引用此评论,您需要:

...通过SDK Manager更新到API 22的最新SDK平台,并通过SDK Manager更新支持存储库,并在build.gradle文件中使用最新版本(22.0.0)更新到最新的回收站视图)

此外,在设计器工具的顶部,您需要选择API Android版本22.如果您选择早期版本,即使您拥有最新的支持库,您仍将继续看到错误.

Answer 2

这是预览窗口或运行时的问题吗？

RecyclerView需要渲染LayoutManager.

在Java代码中,添加以下内容:

mRecyclerView.setLayoutManager(new LinearLayoutManager(context));