Android Data Binding makes app crash when using include tag in a non-root ViewGroup

Question

When I use include tag in a non-root element in my xml file with Android Data Binding, app crashes. But the app works well when the include tag is placed in the root element or without data binding things.

Here is my source code, can any one help me to figure out the reason ?

activity_main.xml

<layout>

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context=".MainActivity">


        <TextView
            android:id="@+id/text_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/hello_world" />

        <LinearLayout

            android:layout_width="match_parent"
            android:layout_height="match_parent">

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

        </LinearLayout>
    </LinearLayout>
</layout>

---

MainActivity.java

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        binding.textView.setText("hello world");
    }
}

stack trace

I/ActivityManager(13254): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.liangfeizc.databindings/.MainActivity (has extras)} from uid 10008 on display 0
I/ActivityManager(13254): Start proc com.liangfeizc.databindings for activity com.liangfeizc.databindings/.MainActivity: pid=18181 uid=10065 gids={50065, 9997} abi=x86
I/art     (18181): Not late-enabling -Xcheck:jni (already on)
D/AndroidRuntime(18181): Shutting down VM
E/AndroidRuntime(18181): FATAL EXCEPTION: main
E/AndroidRuntime(18181): Process: com.liangfeizc.databindings, PID: 18181
E/AndroidRuntime(18181): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.liangfeizc.databindings/com.liangfeizc.databindings.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.LinearLayout.setTag(java.lang.Object)' on a null object reference
E/AndroidRuntime(18181):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
E/AndroidRuntime(18181):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
E/AndroidRuntime(18181):  at android.app.ActivityThread.access$800(ActivityThread.java:144)
E/AndroidRuntime(18181):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
E/AndroidRuntime(18181):  at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime(18181):  at android.os.Looper.loop(Looper.java:135)
E/AndroidRuntime(18181):  at android.app.ActivityThread.main(ActivityThread.java:5221)
E/AndroidRuntime(18181):  at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(18181):  at java.lang.reflect.Method.invoke(Method.java:372)
E/AndroidRuntime(18181):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
E/AndroidRuntime(18181):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
E/AndroidRuntime(18181): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.LinearLayout.setTag(java.lang.Object)' on a null object reference
E/AndroidRuntime(18181):  at com.liangfeizc.databindings.databinding.ActivityMainBinding.<init>(ActivityMainBinding.java:27)
E/AndroidRuntime(18181):  at com.liangfeizc.databindings.databinding.ActivityMainBinding.bind(ActivityMainBinding.java:88)
E/AndroidRuntime(18181):  at android.databinding.DataBinderMapper.getDataBinder(DataBinderMapper.java:14)
E/AndroidRuntime(18181):  at android.databinding.DataBindingUtil.bind(DataBindingUtil.java:107)
E/AndroidRuntime(18181):  at android.databinding.DataBindingUtil.inflate(DataBindingUtil.java:68)
E/AndroidRuntime(18181):  at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:185)
E/AndroidRuntime(18181):  at com.liangfeizc.databindings.MainActivity.onCreate(MainActivity.java:18)
E/AndroidRuntime(18181):  at android.app.Activity.performCreate(Activity.java:5937)
E/AndroidRuntime(18181):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
E/AndroidRuntime(18181):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
E/AndroidRuntime(18181):  ... 10 more
W/ActivityManager(13254):   Force finishing activity com.liangfeizc.databindings/.MainActivity
D/        (13254): HostConnection::get() New Host Connection established 0xa0a234d0, tid 13352

Answer 1

Reported here: https://code.google.com/p/android/issues/detail?id=176649

Fixed internally, should be released soon.