Question 128491 in Android Studio Question posted in
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Android Studio – How to call one of multiple animations in raw directory

I’m trying to use a random number generator to pick between one of 10 different animations to run using a Lottie implementation. I’ve named the animations animation1 to animation10. When directly inputing one of the animations like this there’s no issue:

animationView.setAnimation(R.raw.animation2);

but the app keeps on crashing when inputing it like this:

LottieAnimationView animationView = findViewById(R.id.animationViewer);
randNumber = rand.nextInt(10) + 1;

animationView.setAnimation("R.raw.animation" + randNumber);

With the cause being:

Caused by: java.io.FileNotFoundException: R.raw.animation2
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3

Answers


  1. Chosen as BEST ANSWER
    0

    Found this to be the best solution

    Resources resources = context.getResources();
String animationDir = "animation" + randNumber;
final int resourceId = resources.getIdentifier(animationDir, "raw", context.getPackageName());
context.getPackageName();

animationView.setAnimation(resourceId);

  2. 0

    You can’t do that because setAnimation() requires a ResID and not a string.

    Instead, you can use an Array like this

    <integer-array name="animations">
    <item>@anim/animation1</item>
    <item>@anim/animation2</item>
</integer-array>

    And then, you can use your random number.

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  3. 0

    you are trying to send a resource id as a string
    you can create an array of resources or the easiest but not the cleanest way is :

     animID = when(randNumber){

    1 -> {R.raw.animation1}
    2 -> {R.raw.animation2}
    .
    .
    .
    .
    10 -> {R.raw.animation10}
    }

    animationView.setAnimation(animID);

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