Android. Extending FrameLayout. Couldn't find setter/getter for property xFraction exception

Question

I have extended FrameLayout class for making slide-in slide-out animation on fragment transition. I want to get xFraction value programmatically.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ImageView
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="15dp"
        android:src="@+drawable/logo" />

    <com.example.helpers.CustomFrameLayout
        android:id="@+id/fragment"
        android:layout_width="wrap_content"
        android:layout_height="match_parent" />

</RelativeLayout>

CustomFrameLayout looks like

public class CustomFrameLayout extends FrameLayout {


    public CustomFrameLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }

    public CustomFrameLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
    }

    public CustomFrameLayout(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }

    public float getXFraction() {
        return getX() / getWidth();
    }

    public void setXFraction(float xFraction) {
        final int width = getWidth();
        setX((width > 0) ? (xFraction * width) : -9999);
    }
}

An exception is thrown when animation is starting after button click:

Can't find native method using JNI, use reflectionjava.lang.NoSuchMethodError: no method with name='setXFraction' signature='(F)V' in class Landroid/widget/RelativeLayout;
02-17 13:57:33.369: E/PropertyValuesHolder(12223): Couldn't find setter/getter for property xFraction with value type float

Animate the transition between fragments - i got my idea from there. But it doesn't work. Help me please

http://stackoverflow.com/questions/19372436/doing-a-push-fragment-animation?answertab=active#tab-top - i have found the answer here. — user2918962, Feb 18 '14 at 10:56

score 0 · Answer 1 · answered Feb 17 '14 at 10:32

0

It seems that you are trying to call method: setXFraction() on the parent RelativeLayout instead on your com.example.helpers.CustomFrameLayout.

You should get reference to your CustomFrameLayout like this (assuming you already have reference to your parent layout named parentRelativeLayout):

CustomFrameLayout customFrameLayout = (CustomFrameLayout) parentRelativeLayout.findViewById(R.id.fragment);

Now you can call setXFraction() on the proper reference e.g.:

customFrameLayout.setXFraction(25.4);

answered Feb 17 '14 at 10:32

petrsyn

5,054
3
45
48

public void onClick(View v) { parentAct.setTransaction(getFragmentManager() .beginTransaction()); parentAct.getTransaction().setCustomAnimations( R.anim.slide_from_right_to_screen, R.anim.slide_from_screen_to_left); parentAct.getTransaction().replace(R.id.fragment, parentAct.getNativeLoginFr()); parentAct.getTransaction().commit(); } - so i don't call this method, it should work itself – user2918962 Feb 17 '14 at 11:01
my slide_from_right_to_screen.xml content is – user2918962 Feb 17 '14 at 11:04

score 0 · Answer 2 · answered Feb 17 '14 at 11:50

Whatever view you are trying to animate should have setXFraction method.

If you are inflating this entire xml, it would check for setXFraction in your relative layout.

I guess getNativeLoginFr is give your view and it is inflating the entire xml..

You need to only inflate that FrameLayout for your animation to work.

Android. Extending FrameLayout. Couldn't find setter/getter for property xFraction exception

2 Answers2