How to use with JsonReader?

[AndroidDeveloperLB]

On v3.0.3 , I could use this:

        val reader = android.util.JsonReader(BufferedReader(InputStreamReader(FileInputStream(File(filePath)))))
        animationView.setAnimation(reader, null)

But when I've recently updated to 3.0.6 , it says I need to use com.airbnb.lottie.parser.moshi.JsonReader instead.

It doesn't seem like the normal JsonReader , and I can't pass it what I've passed to it.

How can I use the new JsonReader of Lottie? What should I do?

[gpeal]

@AndroidDeveloperLB Hmm, this was an unintended consequence of us switching out the underlying JsonReader for performance and to fix some OEM specific crashes. I'll expose the InputStream version then you can do setAnimation(FileInputStream(...))

[AndroidDeveloperLB]

What is the best way to handle the InputStream ? Is this currently possible ?
Does it close it automatically, or do I have to close it myself?

[gpeal]

You can use LottieCompisitionFactory.fromInputStream(InputStream, cacheKey) and yes, it will close it.

[AndroidDeveloperLB]

You probably mean LottieCompositionFactory.fromJsonInputStream(FileInputStream(File(filePath)), null)

But what do I do with it exactly? It looks like a background task.

I want to set the animation of the LottieAnimationView to use it.
There is no animationView.setAnimation(...) to use what's coming from this function...

All I want is that it will load and show the animation from the inputStream. Let it load later however it needs in the background.

[gpeal]

@AndroidDeveloperLB You can add a listener on the task then call animationView.setComposition I'll expose better APIs through LottieAnimationView in a future version to simplify/wrap this but for now, that will work just fine.

[AndroidDeveloperLB]

I want to set the animation and let the View handle it, just like any other source of animation.
If there is a new animation to set for it, the previous one will be cancelled.
At least, that's how it worked so far, no?
Meaning that if I had called animationView.setAnimation(whatever...) and soon after I called animationView.setAnimation(whatever2...) , it will ditch what it had tried to load before.

If I use a listener, I will need to somehow manage this situation, because I can't just tell it to set the animation when it's done, as there might be a different animation being set between the time I started to the time I got a callback from the listener.
This requires extending the animation view of Lottie.

Can you please show how to use what you wrote?

[gpeal]

@AndroidDeveloperLB As I mentioned, I am going to add an InputStream version directly on LottieAnimationView

[gpeal]

In the mean time, you could also convert it to a String and pass the json string in. Not ideal but I'll fix this soon.

[AndroidDeveloperLB]

Can you please let me know after it gets fixed?

[AndroidDeveloperLB]

So which version to use, that allows to use InputStream?
The release page hasn't updated since 3.0.7 :
https://github.com/airbnb/lottie-android/releases

[gpeal]

The next release, it'll likely by 3.1.0. I hope to release it this week.

[AndroidDeveloperLB]

What's the best way for now, then, to set animation from File (or file path) ?

[AndroidDeveloperLB]

Is it this:

animationView.setAnimationFromUrl(filePath)

?

[gpeal]

Right now, read the file as a string then pass it to setAnimationFromJson. I'll make a new release this week though.

[AndroidDeveloperLB]

Does setAnimationFromUrl work fine with filePath as I wrote?

[gpeal]

@AndroidDeveloperLB No because a file is not a network url.

[AndroidDeveloperLB]

@gpeal I see. In the docs they say as if it's a normal file, so I thought it can be used too.

[AndroidDeveloperLB]

@gpeal So for now it's possible to do as such:

            val jsonStr = IOUtils.toString(BufferedReader(InputStreamReader(FileInputStream(File(filePath)))))
            animationView.setAnimationFromJson(jsonStr, null)

?
Sadly this is on the UI thread, but should work fine for now on tiny files...

[gpeal]

@AndroidDeveloperLB or LottieCompositionFactory.fromInputStream(...)

[AndroidDeveloperLB]

@gpeal There is no such thing:

And if you mean fromJsonInputStream instead, I don't see how to set it to the animationView :

[gpeal]

@AndroidDeveloperLB Yes, fromJsonInputStream. Add a success listener to that and call setComposition on your LottieAnimationView with the result.

[AndroidDeveloperLB]

I see. Sadly due to this issue:
#1298
I went back to v3.0.3 .
v3.0.7 caused a lot of issues for users due to this crash (or at least so it seems for now).

I hope next version will fix this, and also provide a nicer way to handle what I wrote here.