Image is not displayed initially

[francophong]

Hi,

I edited the layout a bit for my project's purpose as below:

    <com.flavienlaurent.notboringactionbar.KenBurnsView
        android:id="@+id/header_picture"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/picture0" />

// I replace the imageview with a custom view

        <ImageView
            android:id="@+id/header_logo"
            android:layout_width="@dimen/header_logo_size"
            android:layout_height="@dimen/header_logo_size"
            android:layout_centerInParent="true"
            android:layout_alignParentTop="true"
            android:paddingTop="15dp"
            />

        <ImageView
            android:id="@+id/header_logo_hide"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_centerHorizontal="true" />

        <TextView
            android:id="@+id/header_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/header_logo"
            android:layout_centerHorizontal="true
            android:paddingTop="20dp"
            android:textSize="20dp"
            android:textStyle="bold" />
  </RelativeLayout>

</FrameLayout>

and I use this layout in a fragment, so the code was changed a bit to work in fragment

• The view was inflated in onCreateView and onActivityCreated.
• Instead of interpolating header_logo to the action bar icon, I want header_logo to interpolating to the header_logo_hide. The code changed:
  interpolate(mHeaderLogo, mHeaderLogoHide, sSmoothInterpolator.getInterpolation(ratio));

Issue: when open the fragment, the header_logo is not displayed unless I make a initial action like scroll or touch or click.

Please help to advise me.

[francophong]

I debugged and found the issue.
The calculation of ScaleX and ScaleY return "NaN" by somehow.
Solution: change the calculation
float scaleX = 1.0F + interpolation * (mRect2.width() /360.0F - 1.0F);
It worked as a charm