Getting to work backgroundDrawable in JAVA

[ankandrew]

Problem

I want to use a gradient background in JAVA, but the backgroundColorRes has priority over the backgroundDrawable.

Sample to Reproduce

I've used the Example App and changed JavaIntro first lines:

From

AppIntro/example/src/main/java/com/github/appintro/example/ui/java/JavaIntro.java

Lines 19 to 21 in 0b782db

	addSlide(AppIntroFragment.createInstance("Welcome!",
	"This is a demo example in java of AppIntro library, with a custom background on each slide!",
	R.drawable.ic_slide1));

To

addSlide(AppIntroFragment.createInstance(
        "Welcome!",
        "This is a demo example in java of AppIntro library, with a custom background on each slide!",
        R.drawable.ic_slide1,
        0,
        0,
        0,
        0,
        0,
        R.drawable.back_slide1
));

Result

[ankandrew]

@cortinico Am I doing something wrong?

[cortinico]

What you're doing is correct. However, backgroundDrawable has priority over the other background:

AppIntro/appintro/src/main/java/com/github/appintro/AppIntroBaseFragment.kt

Lines 155 to 166 in 3a301e4

	when {
	bgDrawable != 0 -> {
	mainLayout?.setBackgroundResource(bgDrawable)
	}
	defaultBackgroundColorRes != 0 -> {
	mainLayout?.setBackgroundColor(ContextCompat.getColor(requireContext(), defaultBackgroundColorRes))
	}
	else -> {
	@Suppress("DEPRECATION")
	mainLayout?.setBackgroundColor(defaultBackgroundColor)
	}
	}

If you wish me to investigate further, you need to provide more details (like a reproducer, which versions of AppIntro you're using, and the content of back_slide1).

[ankandrew]

Sample to Reproduce

I've used the Example App and changed JavaIntro first lines:

From

AppIntro/example/src/main/java/com/github/appintro/example/ui/java/JavaIntro.java

Lines 19 to 21 in 0b782db

	addSlide(AppIntroFragment.createInstance("Welcome!",
	"This is a demo example in java of AppIntro library, with a custom background on each slide!",
	R.drawable.ic_slide1));

To

addSlide(AppIntroFragment.createInstance(
        "Welcome!",
        "This is a demo example in java of AppIntro library, with a custom background on each slide!",
        R.drawable.ic_slide1,
        0,
        0,
        0,
        0,
        0,
        R.drawable.back_slide1
));

So AppIntro version must be the lastest one and back_slide1.xml can be found in this repo (didn't change).

[ankandrew]

I can create a repo to reproduce, but that small change is all I have changed to get the results

[cortinico]

What is happening is that Color Transition is enabled for the Java Example:

AppIntro/example/src/main/java/com/github/appintro/example/ui/java/JavaIntro.java

Lines 50 to 51 in 0b782db

	//Enable the color "fade" animation between two slides (make sure the slide implements SlideBackgroundColorHolder)
	setColorTransitionsEnabled(true);

This overrides the drawable background you specified as the AppIntro is effectively running a color transition between two black slides.

If you comment the line I mentioned, it will work fine 👍

[ankandrew]

Yep, that works. Thank you