Android : How to set our own background image to facebook Login Button in xml?

is it possible to set our own background image in xml for Facebook Login Button ?

my xmlc in my Project(i.e FBDemo)

<com.facebook.widget.LoginButton
    xmlns:facebook="http://schemas.android.com/apk/res-auto"
    android:id="@+id/btn_facebook"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_above="@+id/btn_login"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="15dp"
    facebook:background_image="@drawable/login_with_fb"
    facebook:confirm_logout="false"
    facebook:fetch_user_info="true" />

I make changes in Facebook SDK like this

in FacebookSDK project values/attr.xml

<declare-styleable name="com_facebook_login_view">
    <attr name="confirm_logout" format="boolean"/>
    <attr name="fetch_user_info" format="boolean"/>
    <attr name="login_text" format="string"/>
    <attr name="logout_text" format="string"/>
    <attr name="background_image" format="integer"/>
</declare-styleable>

and in LoginButton.java

private int background_image;
private void parseAttributes(AttributeSet attrs) {
    TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.com_facebook_login_view);
    confirmLogout = a.getBoolean(R.styleable.com_facebook_login_view_confirm_logout, true);
    fetchUserInfo = a.getBoolean(R.styleable.com_facebook_login_view_fetch_user_info, true);
    loginText = a.getString(R.styleable.com_facebook_login_view_login_text);
    logoutText = a.getString(R.styleable.com_facebook_login_view_logout_text);
    background_image = a.getInt(R.styleable.com_facebook_login_view_background_image, R.drawable.com_facebook_button_blue);

    a.recycle();
}

public LoginButton(Context context, AttributeSet attrs) {
    super(context, attrs);

    if (attrs.getStyleAttribute() == 0) {
        // apparently there's no method of setting a default style in xml,
        // so in case the users do not explicitly specify a style, we need
        // to use sensible defaults.
        this.setGravity(Gravity.CENTER);
        this.setTextColor(getResources().getColor(R.color.com_facebook_loginview_text_color));
        this.setTextSize(TypedValue.COMPLEX_UNIT_PX,
                getResources().getDimension(R.dimen.com_facebook_loginview_text_size));
        this.setTypeface(Typeface.DEFAULT_BOLD);
        if (isInEditMode()) {
            // cannot use a drawable in edit mode, so setting the background color instead
            // of a background resource.
            this.setBackgroundColor(getResources().getColor(R.color.com_facebook_blue));
            // hardcoding in edit mode as getResources().getString() doesn't seem to work in IntelliJ
            loginText = "Log in with Facebook";
        } else {
            //this.setBackgroundResource(R.drawable.com_facebook_button_blue);
            this.setBackgroundResource(background_image);
            this.setCompoundDrawablesWithIntrinsicBounds(R.drawable.com_facebook_inverse_icon, 0, 0, 0);
            this.setCompoundDrawablePadding(
                    getResources().getDimensionPixelSize(R.dimen.com_facebook_loginview_compound_drawable_padding));
            this.setPadding(getResources().getDimensionPixelSize(R.dimen.com_facebook_loginview_padding_left),
                    getResources().getDimensionPixelSize(R.dimen.com_facebook_loginview_padding_top),
                    getResources().getDimensionPixelSize(R.dimen.com_facebook_loginview_padding_right),
                    getResources().getDimensionPixelSize(R.dimen.com_facebook_loginview_padding_bottom));
        }
    }
    parseAttributes(attrs);
    if (!isInEditMode()) {
        initializeActiveSessionWithCachedToken(context);
    }        
}

I am passing my own background to xml of Facebbok loginbutton in my xml

but this gives me runtime error like below

08-07 06:41:59.492: E/AndroidRuntime(1731): Caused by: java.lang.NumberFormatException: Invalid int: "res/drawable-hdpi/login_with_fb.png"

I think this error occur because of login_with_fb.png image is reside in FBDemo and FacebookSDK project can't find drawable image login_with_fb.png in it

I know the other way, just setting background image in Activity , but I want to set in xml is there any solution ??