NavigationView could not be instantiated

Jakob97 · 27. November 2015

Hallo

Ich habe ein Projekt in Android Studio welches einen Navigation Drawer verwendet. Wenn ich die Datei activity_main.xml öffne steht in der Design-Ansicht einiges an Fehlermeldungen.
Die App lässt sich auf meinem Galaxy Ace (Android 2.3.5) problemlos ausführen, aber der Navigation Drawer ist deformiert. Auf Android 4.4.2 lässt sich die App nicht einmal öffnen.

Was mach ich hier falsch??

Code

Rendering Problems
The following classes could not be found:
- android.support.v7.internal.app.WindowDecorActionBar
The following classes could not be instantiated:
- android.support.design.widget.NavigationView
Exception Details
java.lang.NullPointerException
	at com.android.layoutlib.bridge.impl.ResourceHelper.getDrawable(ResourceHelper.java:195)
	at android.content.res.BridgeResources.getDrawable(BridgeResources.java:164)
	at android.content.Context.getDrawable(Context.java:458)
	at android.support.v4.content.ContextCompatApi21.getDrawable(ContextCompatApi21.java:26)
	at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:321)
	at android.support.v7.widget.TintManager.getDrawable(TintManager.java:147)
	at android.support.v7.view.menu.MenuItemImpl.getIcon(MenuItemImpl.java:421)
	at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.prepareMenuItems(NavigationMenuPresenter.java:465)
	at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.update(NavigationMenuPresenter.java:426)
	at android.support.design.internal.NavigationMenuPresenter.updateMenuView(NavigationMenuPresenter.java:113)
	at android.support.design.widget.NavigationView.inflateMenu(NavigationView.java:233)
	at android.support.design.widget.NavigationView.&lt;init&gt;(NavigationView.java:168)
	at android.support.design.widget.NavigationView.&lt;init&gt;(NavigationView.java:94)
	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:422)
	at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:458)
	at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:170)
	at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:103)
	at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:190)
	at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:247)
	at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:171)
	at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
	at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:835)
	at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70)
	at android.view.LayoutInflater.rInflate(LayoutInflater.java:811)
	at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
	at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:223)
	at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:426)
	at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
	at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:510)
	at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:498)
	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:888)
	at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:498)
	at com.android.tools.idea.rendering.RenderTask.access$600(RenderTask.java:72)
	at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:610)
	at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:607)
	at com.android.tools.idea.rendering.RenderService.runRenderAction(RenderService.java:366)
	at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:607)
	at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:629)
	at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$6.run(AndroidDesignerEditorPanel.java:480)
	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$1.run(Alarm.java:351)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	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)

Alles anzeigen

XML: activity_main.xml

&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/drawer_layout"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:fitsSystemWindows="true" tools:openDrawer="start"&gt;


    &lt;include layout="@layout/app_bar_main" android:layout_width="match_parent"
        android:layout_height="match_parent" /&gt;


    &lt;android.support.design.widget.NavigationView android:id="@+id/nav_view"
        android:layout_width="wrap_content" android:layout_height="match_parent"
        android:layout_gravity="start" android:fitsSystemWindows="true"
        app:menu="@menu/activity_main_drawer" /&gt;


&lt;/android.support.v4.widget.DrawerLayout&gt;

Alles anzeigen

XML: app_bar_main.xml

&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:fitsSystemWindows="true"
    tools:context=".MainActivity"&gt;


    &lt;android.support.design.widget.AppBarLayout android:layout_height="wrap_content"
        android:layout_width="match_parent" android:theme="@style/AppTheme.AppBarOverlay"&gt;


        &lt;android.support.v7.widget.Toolbar android:id="@+id/toolbar"
            android:layout_width="match_parent" android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" /&gt;


    &lt;/android.support.design.widget.AppBarLayout&gt;


    &lt;include layout="@layout/content_main" /&gt;


&lt;/android.support.design.widget.CoordinatorLayout&gt;

Alles anzeigen

XML: activity_main_drawer.xml

&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;menu xmlns:android="http://schemas.android.com/apk/res/android"&gt;
    &lt;group android:checkableBehavior="single"&gt;
        &lt;item android:title="IPv4 - Internet Protocol version 4"&gt;
            &lt;menu&gt;
                &lt;item android:id="@+id/ipv4_calc" android:icon="@android:id/empty"
                    android:title="Classful" /&gt;
                &lt;item android:id="@+id/ipv4_subnet" android:icon="@android:id/empty"
                    android:title="Subnetting" /&gt;
                &lt;item android:id="@+id/ipv4_cidr" android:icon="@android:id/empty"
                    android:title="CIDR (classless)" /&gt;
                &lt;item android:id="@+id/ipv4_info" android:icon="@android:id/empty"
                    android:title="Infos / Erklärung" /&gt;
            &lt;/menu&gt;
        &lt;/item&gt;


        &lt;item android:title="IPv6 - Internet Protocol version 6"&gt;
            &lt;menu&gt;
                &lt;item android:id="@+id/ipv6_subnet" android:icon="@android:id/empty"
                    android:title="Subnetting" /&gt;
                &lt;item android:id="@+id/ipv6_info" android:icon="@android:id/empty"
                    android:title="Info / Erklärung" /&gt;
            &lt;/menu&gt;
        &lt;/item&gt;
    &lt;/group&gt;
&lt;/menu&gt;

Alles anzeigen

Ben · 30. November 2015

du scheinst irgendwo support v7 appcompat komponenten zu verwenden, zu denen keine bibliothek eingebunden ist.

Jakob97 · 1. Dezember 2015

Ist doch eingebunden oder?

Code: gradle.build (Module: app)

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:design:23.1.1'
}

Ben · 17. Februar 2016

das ist schon richtig, aber in appcompat ist eben nicht alles drin. Recyclerview ist z.b. eine abhängigkeit für sich und nicht in die appcompat support library integriert. Diese Komponenten zählen jedoch trotzdem zur Support Library auch wenn sie nicht in dieser integriert sind.

NavigationView could not be instantiated

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