小编Cha*_*ikh的帖子

我安装了最新版本Android Studio并创建了hello world应用程序.但activity无法在预览窗格中呈现.我安装了所有最新的软件包SDK manager.错误显示如下

java.lang.NoSuchFieldError: View_theme
    at android.support.v7.internal.widget.ViewUtils.themifyContext(ViewUtils.java:124)
    at android.support.v7.widget.Toolbar.<init>(Toolbar.java:198)
    at android.support.v7.widget.Toolbar.<init>(Toolbar.java:192)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:413)
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:105)
    at com.android.tools.idea.rendering.LayoutlibCallback.loadView(LayoutlibCallback.java:176)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:214)
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:142)
    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.rInflate_Original(LayoutInflater.java:809)
    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:414)
    at com.android.layoutlib.bridge.bars.BridgeActionBar.<init>(BridgeActionBar.java:84)
    at com.android.layoutlib.bridge.bars.AppCompatActionBar.<init>(AppCompatActionBar.java:56)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.createActionBar(RenderSessionImpl.java:1691)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:362)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:321)
    at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
    at com.android.tools.idea.rendering.RenderService$5.compute(RenderService.java:708)
    at com.android.tools.idea.rendering.RenderService$5.compute(RenderService.java:697)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:932)
    at com.android.tools.idea.rendering.RenderService.createRenderSession(RenderService.java:697)
    at com.android.tools.idea.rendering.RenderService.render(RenderService.java:816)
    at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$6.run(AndroidDesignerEditorPanel.java:480)
    at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
    at …

我有以我的自定义主题为主题的活动,但对于微调器我选择用Appcompat v21设计它,但我得到了这个:

那么如果有一种方法,如何将Spinner箭头更改为黑色或蓝色？

我发现这是类似的问题,但没有任何答案:https://stackoverflow.com/questions/28561105/add-custom-spinner-arrow 这里是我的微调:

<Spinner
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/spinner2"
        android:layout_marginTop="10dp"
        android:layout_centerInParent="true" />

我用它来设置微调器的样式:

 <style name="MyTheme.SpinnerAppTheme" parent="Widget.AppCompat.Spinner">
    </style>

这是我如何使用适配器

   ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                getBaseContext(), R.array.listMedRes, android.R.layout.simple_spinner_item);

我只是想以旋转器为主题,非常感谢