更新到 Android 设计支持 22.2.1 后出现 Nullpointer 异常

Question

在我更新到 Android 设计支持 22.2.1 之前，我的项目运行良好，在我更新并运行程序后，我收到以下错误。 该异常没有说明是哪一行代码或java文件导致了错误，所以不知道要发布什么代码。似乎是android设计支持的一些内部错误。

我的活动正在扩展 AppCompatActivity 和我的测试设备 API 15(Android 4.04)。

我在我的代码中使用NavigationView 和DrawerLayout。

我的build.gradle

android {
compileSdkVersion 22
buildToolsVersion "22.0.1"

defaultConfig {
    applicationId "com.stackoverflow.ranjith.androidprojdel"
    minSdkVersion 15
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
    multiDexEnabled true
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.2.+'
compile 'com.parse.bolts:bolts-android:1.+'
compile 'com.android.support:cardview-v7:22.2.+'
compile 'com.android.support:recyclerview-v7:22.2.+'
compile 'com.google.android.gms:play-services-plus:7.5.0'
compile 'com.google.android.gms:play-services-ads:7.5.0'
compile 'com.android.support:design:22.2.+'
compile 'joda-time:joda-time:2.8.1'
}

例外：

07-19 00:52:49.338: E/AndroidRuntime(15556): FATAL EXCEPTION: main
07-19 00:52:49.338: E/AndroidRuntime(15556): java.lang.NullPointerException
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.support.design.internal.NavigationMenuItemView.setIcon(NavigationMenuItemView.java:113)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.support.design.internal.NavigationMenuItemView.initialize(NavigationMenuItemView.java:72)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.getView(NavigationMenuPresenter.java:305)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.HeaderViewListAdapter.getView(HeaderViewListAdapter.java:220)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.AbsListView.obtainView(AbsListView.java:2045)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.ListView.makeAndAddView(ListView.java:1772)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.ListView.fillDown(ListView.java:672)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.ListView.fillFromTop(ListView.java:732)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.ListView.layoutChildren(ListView.java:1625)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.AbsListView.onLayout(AbsListView.java:1875)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.View.layout(View.java:11390)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewGroup.layout(ViewGroup.java:4332)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.FrameLayout.onLayout(FrameLayout.java:444)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.View.layout(View.java:11390)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewGroup.layout(ViewGroup.java:4332)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:931)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.View.layout(View.java:11390)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewGroup.layout(ViewGroup.java:4332)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.FrameLayout.onLayout(FrameLayout.java:444)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.View.layout(View.java:11390)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewGroup.layout(ViewGroup.java:4332)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1653)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1511)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1416)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.View.layout(View.java:11390)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewGroup.layout(ViewGroup.java:4332)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.FrameLayout.onLayout(FrameLayout.java:444)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.View.layout(View.java:11390)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewGroup.layout(ViewGroup.java:4332)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1653)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1511)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1416)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.View.layout(View.java:11390)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewGroup.layout(ViewGroup.java:4332)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.widget.FrameLayout.onLayout(FrameLayout.java:444)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.View.layout(View.java:11390)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewGroup.layout(ViewGroup.java:4332)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1490)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2455)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.os.Handler.dispatchMessage(Handler.java:99)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.os.Looper.loop(Looper.java:137)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at android.app.ActivityThread.main(ActivityThread.java:4424)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at java.lang.reflect.Method.invokeNative(Native Method)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at java.lang.reflect.Method.invoke(Method.java:511)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:817)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
07-19 00:52:49.338: E/AndroidRuntime(15556):    at dalvik.system.NativeStart.main(Native Method)

更新

当我回滚到 22.2.0 时，错误消失了，不确定是什么问题。

Answer 1

问题与 NavigationView 菜单 xml 有关。

我的看起来像这样：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
            android:id="@+id/navigation_subheader"
            android:title="Titulo">
        <menu>
            <item
                    android:id="@+id/navigation_sub_item_1"
                    android:icon="@drawable/abc_btn_radio_material"
                    android:title="sub-1"/>
            <item
                    android:id="@+id/navigation_sub_item_2"
                    android:icon="@drawable/abc_btn_rating_star_on_mtrl_alpha"
                    android:title="sub-2"/>
        </menu>
    </item>
</menu>

但如果我切换到项目可绘制图标，它是固定的：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
            android:id="@+id/navigation_subheader"
            android:title="Titulo">
        <menu>
            <item
                    android:id="@+id/navigation_sub_item_1"
              ----> android:icon="@drawable/some_local_drawable"
                    android:title="sub-1"/>
            <item
                    android:id="@+id/navigation_sub_item_2"
              ----> android:icon="@drawable/some_local_drawable"
                    android:title="sub-2"/>
        </menu>
    </item>
</menu>

当然，这发生在更新到 22.2.1 之后

Answer 2

我遇到了同样的问题，并且能够使用此代码避免它：

View header = LayoutInflater.from(this).inflate(R.layout.nav_header_main, null);
navigationView.addHeaderView(header);
TextView text = (TextView) header.findViewById(R.id.textView);
texto.setText("HELLO");