Error Referencing an Inner Class View in Layout/Main.Xml

Error referencing an inner class View in layout/main.xml

For inner classes the syntax becomes:

<view class="com.grafightscratch.ochemmer.MoleculeTablet$MoleculeTabletView" />

The reason is that $ is an illegal character in XML tags.

Error inflating inner class view

You need to add public static to the inner class.

• public because it needs to be visible from outside.
• static because if not you will need to have CupcakeMessage to instantiate it.

All the same I would recommend doing the View in a separated class.

Android Layout Issue: Getting the Namespace Right

Try to have something like this in your main activity's xml:

<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
                               xmlns:tools="http://schemas.android.com/tools"
                               android:id="@+id/pager"
                               android:layout_width="match_parent"
                               android:layout_height="match_parent"
                               tools:context="com.example.android.effectivenavigation.MainActivity.NonSwipeableViewPager"/>

Hope this helps.

Edit: I'm still new user and I am not used yet to how extensive my answers should be. So here is a bit more of an example of what I did:

You can extent Fragment in your custom class and have an onCreateView method in it. Also you should have a separate layout xml (in my example named fragment_example) for this fragment. The method should return a View object that inflates fragment's layout. Here is an example:

public static class ExampleFragment extends Fragment {

    static Button b;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_exmaple, container, false);

        b = (Button) rootView.findViewById(R.id.button1);

        b.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //do something
            }
        });

        return rootView;
    }

}

And here is the corresponding layout xml:

<?xml version="1.0" encoding="utf-8"?>
 <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="fill_parent"
          android:orientation="vertical"
          tools:context=".activity_name">

          <Button
            android:layout_width="227dp"
            android:layout_height="40dp"
            android:text="Search"
            android:id="@+id/search"
            android:layout_gravity="center_horizontal"
            android:background="#80ffffff"
            android:textColor="#ffff6b6b"/>

 </LinearLayout>

You will also need an FragmentPagerAdapter class to create the fragments:

public static class AppSectionsPagerAdapter extends FragmentPagerAdapter {

    public AppSectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int i) {
        switch (i) {

            default:
                return new ExampleFragment();
        }
    }

    @Override
    public int getCount() {
        return 1;
    }
}

Finaly in your activitys onCreate method you should have something like that:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Create the adapter that will return a fragment for each of the two primary sections
    // of the app.
    mAppSectionsPagerAdapter = new AppSectionsPagerAdapter(getSupportFragmentManager());

    // Set up the ViewPager, attaching the adapter and setting up a listener for when the
    // user swipes between sections.
    mViewPager = (ViewPager) findViewById(R.id.pager);
    mViewPager.setAdapter(mAppSectionsPagerAdapter);

}

Heavily based in this: http://developer.android.com/training/implementing-navigation/lateral.html

I hope this offers more detail and helps you more

can't reference the xml layout in Activity

Pls check your imported R ? If you've imported with android.R then import with your package name.

XML Files are Unable to Reference class Files

The solution to this was, as mentioned in the comments of the post above, clearing cached files through file=>invalidates Caches/Restart.

how to inflate a view class in main.xml

it is , but what i was missing is that in order for it to be inflated, the view must be declared static.

Android databinding on inner class not updating TextView

The problem is in how you're mixing data binding layouts with regular layouts.

If you want to include a data binding layout from a regular layout, you need to find the root view of the layout and call bind() on it. Maybe something like this:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_picker_dashboard);
    View bindingRoot = findViewById(R.id.toolbar);

    LayoutHeaderBinding binding = LayoutHeaderBinding.bind(bindingRoot);

    ProfileResponse.Payload profilePayload = new ProfileResponse.Payload();
    profilePayload.setFirstName("Test");

    binding.setProfilePayload(profilePayload);
}

However, it is better to make your Activity's layout a data binding layout and you won't have to do that extra work:

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
    <data>
        <variable
            name="profilePayload"
            type="myms.models.ProfileResponse.Payload"/>
    </data>
    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <!-- Top header -->

        <include layout="@layout/layout_header" app:profilePayload="@{profilePayload}" />

        <!-- DrawerLayout -->
    </android.support.constraint.ConstraintLayout>
</layout>

And then your binding code is much simpler and less error prone:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ActivityPickerDashboardBinding binding = 
        DataBindingUtil.setContentView(this, R.layout.activity_picker_dashboard);

    ProfileResponse.Payload profilePayload = new ProfileResponse.Payload();
    profilePayload.setFirstName("Test");

    binding.setProfilePayload(profilePayload);
}

On a different note, I think Android data binding and butterknife have significant overlap in functionality and I would recommend choosing one or the other, but not both.

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