RuntimeException: Failed to inflate behavior subclass

Question

RuntimeException: Failed to inflate behavior subclass

I am new to android and I am having problems with FloatingActionButton

behaivors

My custom behavior class:

public class ScrollingFABBehavior extends FloatingActionButton.Behavior {
    private static final String TAG = "ScrollingFABBehavior";

    public ScrollingFABBehavior(Context context, AttributeSet attrs,
            Handler mHandler) {
        super();
    }

    @Override
    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout,
            FloatingActionButton child, View directTargetChild, View target,
            int nestedScrollAxes) {
        return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL
                || super.onStartNestedScroll(coordinatorLayout, child,
                        directTargetChild, target, nestedScrollAxes);
    }

    @Override
    public void onNestedScroll(CoordinatorLayout coordinatorLayout,
            FloatingActionButton child, View target, int dxConsumed,
            int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
        super.onNestedScroll(coordinatorLayout, child, target, dxConsumed,
                dyConsumed, dxUnconsumed, dyUnconsumed);
        if (dyConsumed > 0 && child.getVisibility() == View.VISIBLE) {
            child.hide();
        } else if (dyConsumed < 0 && child.getVisibility() == View.GONE) {
            child.show();
        }
    }

    @Override
    public void onStopNestedScroll(CoordinatorLayout coordinatorLayout,
            FloatingActionButton
            child, View target) {
        super.onStopNestedScroll(coordinatorLayout, child, target);
    }
}

XML snippet:

...

<android.support.design.widget.FloatingActionButton
        android:id="@+id/share_fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        android:contentDescription="@string/action_share"
        android:elevation="@dimen/fab_elevation"
        android:src="@drawable/ic_share"
        app:layout_behavior=".ScrollingFABBehavior"/>

</android.support.design.widget.CoordinatorLayout>

RuntimeError when fragment inflates xml:

07-14 08:52:43.904 30785-30785/com.example.xyzreader E/AndroidRuntime: FATAL EXCEPTION: main
                                                                       Process: com.example.xyzreader, PID: 30785
                                                                       android.view.InflateException: Binary XML file line #115: Could not inflate Behavior subclass com.example.xyzreader.ui.ScrollingFABBehavior
                                                                       Caused by: java.lang.RuntimeException: Could not inflate Behavior subclass com.example.xyzreader.ui.ScrollingFABBehavior
                                                                           at android.support.design.widget.CoordinatorLayout.parseBehavior(CoordinatorLayout.java:615)
                                                                           at android.support.design.widget.CoordinatorLayout$LayoutParams.<init>(CoordinatorLayout.java:2652)

etc

What's wrong?

+10

java android coordinator-layout

Aleksey Leonov Jul 14 17 at 10:42

source to share

4 answers

PangoSea · Answer 1 · 2017-09-04T03:15:01+0000

Add the following two constructors to yours FooterBehavior

:

public FooterBehavior() {
}

public FooterBehavior(Context context, AttributeSet attrs) {
    super(context, attrs);
}

Md imran choudhury · Answer 2 · 2019-04-01T10:09:34+0000

If you are using AndroidX (an open source project that the Android team uses to develop, test, package, version and release libraries in Jetpack), you need to update the XML.

Find your element here and replace:

Support:

android.support.design.widget.FloatingActionButton

AndroidX:

com.google.android.material.floatingactionbutton.FloatingActionButton

Mahmoud Shahoud · Answer 3 · 2019-05-02T13:08:54+0000

Make sure you are using the correct custom behavior classpath.

For example:

app:layout_behavior="net.company.myapp.view.behavior.TextViewBehavior"

Aleksey Leonov · Answer 4 · 2017-07-14T13:33:47+0000

solvable. Change app:layout_behavior=".ScrollingFABBehavior"/>

toapp:layout_behavior=".ui.ScrollingFABBehavior"/>

RuntimeException: Failed to inflate behavior subclass

More articles: