小编Bre*_*vyn的帖子

到目前为止,我一直在使用v23.0.1支持库,没有任何问题.现在当我切换到新的v23.1.0库时,我在抽屉布局中的小部件上得到一个空指针.

mNavigationView = (NavigationView) findViewById(R.id.navigation_view);    
TextView username = (TextView) mNavigationView.findViewById(R.id.username_textView);
//       ^^^^^^^^ is now null when using new library
// which causes the following to fail
username.setText(mUser.getName());

活动布局

<?xml version="1.0" encoding="utf-8"?>
<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"
    tools:context=".MainActivity">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <include layout="@layout/toolbar" />

    ...

</LinearLayout>

<android.support.design.widget.NavigationView
    android:id="@+id/navigation_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/drawer_header"
    app:menu="@menu/drawer_items" />

</android.support.v4.widget.DrawerLayout>

drawer_header.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fresco="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="150dp"
android:orientation="vertical">

   <TextView
    android:id="@+id/username_textView"
    android:layout_width="match_parent"
    android:layout_height="0dp" />

    ...

</LinearLayout>

只需更改gradle文件以使用旧版本即可立即正常工作,因此我认为我的代码没有任何可怕的错误.我查看了 …

Eclipse已经很好地工作了,只要我记得,但现在它拒绝启动.

工作空间中的日志文件显示以下内容.我正在使用Fedora 18.任何想法？

!SESSION 2013-03-17 20:16:47.631 -----------------------------------------------
eclipse.buildId=4.2.0.M20130304-1457
java.version=1.7.0_09-icedtea
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_AU
Command-line arguments:  -os linux -ws gtk -arch x86_64

!ENTRY org.eclipse.osgi 4 0 2013-03-17 20:16:55.304
!MESSAGE Application error
!STACK 1
java.util.EmptyStackException
    at java.util.Stack.peek(Stack.java:102)
    at java.util.Stack.pop(Stack.java:84)
    at org.eclipse.e4.ui.css.core.impl.sac.CSSDocumentHandlerImpl.endDocument(CSSDocumentHandlerImpl.java:74)
    at org.apache.batik.css.parser.Parser.parseStyleSheet(Parser.java:238)
    at org.eclipse.e4.ui.css.core.impl.dom.parsers.AbstractCSSParser.parseStyleSheet(AbstractCSSParser.java:64)
    at org.eclipse.e4.ui.css.core.impl.engine.AbstractCSSEngine.parseStyleSheet(AbstractCSSEngine.java:180)
    at org.eclipse.e4.ui.css.swt.internal.theme.ThemeEngine.setTheme(ThemeEngine.java:415)
    at org.eclipse.e4.ui.css.swt.internal.theme.ThemeEngine.setTheme(ThemeEngine.java:376)
    at org.eclipse.e4.ui.css.swt.internal.theme.ThemeEngine.setTheme(ThemeEngine.java:369)
    at org.eclipse.e4.ui.css.swt.internal.theme.ThemeEngine.restore(ThemeEngine.java:546)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.initializeStyling(PartRenderingEngine.java:1179)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:945)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at …