Android Studio not identifying xml file as layout

2020-08-17 05:20发布

站内文章 / Android
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问题:

I accidentally created drawer_list_item.xml in the screenshot using New -> File menu, instead of New -> Layout resource file and now I can't open it as a regular layout file in design mode. It opens it as a plain text file.

Is there any way I can change its type. I couldn't find anything related to this through Android Studio's settings

File content:

  <?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

              <TextView
              android:layout_width="match_parent"
              android:layout_height="match_parent" />

  </LinearLayout>

Edit for more things I tried:

  • recreating does not work, as it creates it the same way. But, when I recreate it after deletion it gives the following exception. I close the window and the old text file re-appears

            null
java.lang.AssertionError
at org.jetbrains.android.util.AndroidResourceUtil.createFileResource(AndroidResourceUtil.java:1251)
at org.jetbrains.android.actions.CreateTypedResourceFileAction.doCreateAndNavigate(CreateTypedResourceFileAction.java:131)
at org.jetbrains.android.actions.CreateMultiRootResourceFileAction.create(CreateMultiRootResourceFileAction.java:108)
at org.jetbrains.android.actions.CreateResourceActionBase$MyInputValidator.create(CreateResourceActionBase.java:292)
at com.intellij.ide.actions.ElementCreator$1.run(ElementCreator.java:73)
at com.intellij.openapi.application.RunResult.run(RunResult.java:35)
at com.intellij.openapi.command.WriteCommandAction$2$1.run(WriteCommandAction.java:114)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1010)
at com.intellij.openapi.command.WriteCommandAction$2.run(WriteCommandAction.java:111)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:124)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:99)
at com.intellij.openapi.command.WriteCommandAction.performWriteCommandAction(WriteCommandAction.java:108)
at com.intellij.openapi.command.WriteCommandAction.execute(WriteCommandAction.java:80)
at com.intellij.ide.actions.ElementCreator.tryCreate(ElementCreator.java:92)
at org.jetbrains.android.actions.CreateResourceActionBase$MyInputValidator.canClose(CreateResourceActionBase.java:302)
at org.jetbrains.android.actions.CreateMultiRootResourceFileAction$MyDialog.doOKAction(CreateMultiRootResourceFileAction.java:174)
at com.intellij.openapi.ui.DialogWrapper$OkAction.doAction(DialogWrapper.java:1833)
at com.intellij.openapi.ui.DialogWrapper$DialogWrapperAction.actionPerformed(DialogWrapper.java:1799)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6535)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6300)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4891)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:866)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:650)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:381)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:184)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:229)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:227)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227)
at java.awt.Dialog.show(Dialog.java:1084)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:792)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:465)
at com.intellij.openapi.ui.DialogWrapper.invokeShow(DialogWrapper.java:1638)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1587)
at org.jetbrains.android.actions.CreateMultiRootResourceFileAction.invokeDialog(CreateMultiRootResourceFileAction.java:80)
at org.jetbrains.android.actions.CreateResourceActionBase.actionPerformed(CreateResourceActionBase.java:183)
at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:182)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter$1.run(ActionMenuItem.java:311)
at com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:958)
at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.runOnOwnContext(IdeFocusManagerImpl.java:124)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:281)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:109)
at com.intellij.ui.plaf.beg.BegMenuItemUI.doClick(BegMenuItemUI.java:513)
at com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:45)
at com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:533)
at java.awt.Component.processMouseEvent(Component.java:6535)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6300)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4891)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:866)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:650)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:381)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

  • if I rename the file to drawer_item.xml, it gains the icon and is seen as a layout file. If I rename it back to drawer_list_item.xml, the problem returns. So it probably indexed it somewhere as a plain text file...

  • invalidate caches / restart does not fix the problem
  • Tried renaming .idea/workspakce.xml to .idea/workspace.xml.bk so it recreates it in case I missed something - still no luck. I even tried removing .idea folder and app.iml file from the root folder, but no fix

回答1:

Found the source of the problem - it was in the config files Android Studio creates in your home directory: ~/.AndroidStudioPreview2.0. In my case, it was ~/.AndroidStudioPreview2.0/config/options/filetypes.xml

    <application>
      <component name="FileTypeManager" version="16">
        <ignoreFiles list="*.hprof;*.pyc;*.pyo;*.rbc;*~;.DS_Store;.git;.hg;.svn;CVS;RCS;SCCS;__pycache__;_svn;rcs;" />
        <extensionMap>
          <mapping pattern="drawer_list_item.xml" type="PLAIN_TEXT" />
        </extensionMap>
      </component>
    </application>

Therefore, it seems like I somehow made Android Studio index that file name pattern drawer_list_item.xml as plain text... Removing that mapping entry from the file solves the problem: <mapping pattern="drawer_list_item.xml" type="PLAIN_TEXT" />



回答2:

Preferences -> File Types and remove the Registered Pattern



回答3:

I simply had to right click on the file in the Project view and select 'Mark as XML' in Android Studio 2.2.x



回答4:

It happens sometimes when wrong indexes/caches are created by Android Studio.

  1. Go to File menu
  2. Click on Invalidate Caches / Restart
  3. Restart your IDE and wait for IDE to reindex the files

It should be okay after doing those ...



标签： android xml android-layout android-studio intellij-idea
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