Why don't Lottie Animations work in Xamarin.Android?

Question

User367180 posted

In the Lottie docs, they say to use this to play your animation:

<com.airbnb.lottie.LottieAnimationView
    android:id="@+id/animation_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:lottie_fileName="hello-world.json"
    app:lottie_loop="true"
    app:lottie_autoPlay="true" />

In Android design, it says

'app' is an undeclared prefix.

Does anyone know why this is happening?

Thank you!

Answer 1

User355640 posted

Hi @ClovyClov

You need add namespace for 'app', read this:

You can find this:

xmlns:app="http://schemas.android.com/apk/res-auto"

Answer 2

User367180 posted

@robbit

Thank you so much for the response I GREATLY appreciate it!!! I don't know why this isn't specified anywhere on here (to my knowledge).

But this brings another issue. When I try building, I get an exception that says:

Binary XML file line #1: Binary XML file line #1: Error inflating class com.airbnb.lottie.LottieAnimationView

I've tried diagnosing why this could be happening but I honestly have no idea as there's no code used other than what it says in the docs. Any idea why this may be happening? Also attaching my xml below.

XML:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:minWidth="25px"
    android:minHeight="25px"
    android:gravity="center"
    android:id="@+id/linearLayout1">
    <com.airbnb.lottie.LottieAnimationView
        android:id="@+id/animation_view"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:lottie_fileName="cycle_animation.json"
        app:lottie_loop="true"
        app:lottie_autoPlay="true" />
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/slideshowIV"
        android:src="@drawable/viewslideshow"
        android:scaleType="centerCrop" />
    <LinearLayout
        android:id="@+id/idleTextLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:minWidth="25px"
        android:minHeight="25px"
        android:orientation="vertical"
        android:layout_weight="1"
        android:gravity="bottom">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:gravity="center"
            android:orientation="vertical"
            android:layout_weight="3">
            <ImageView
                android:layout_width="100dp"
                android:layout_height="105.2dp"
                android:src="@drawable/beehexagonlogo"
                android:layout_gravity="center"
                android:scaleType="fitCenter" />
            <TextView
                android:id="@+id/loadingTxt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@android:color/white"
                android:text="Loading..." />
        </LinearLayout>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Engage"
            android:fontFamily="sans-serif-light"
            android:textColor="@android:color/white"
            android:textAlignment="viewStart"
            android:id="@+id/textView1"
            android:textStyle="normal"
            android:textSize="36sp"
            android:paddingBottom="6dp" />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Stay true to your brand. Engage with your customers,\non your terms, on your grounds."
            android:id="@+id/textView2"
            android:layout_below="@id/textView1"
            android:textColor="@android:color/white"
            android:lineSpacingExtra="4dp"
            android:textSize="12sp" />
    </LinearLayout>
</LinearLayout>

Answer 3

User355640 posted

Hi @ClovyClov

As I have said, you need add the namespace, you added it at a wrong line, below is my layout:

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

  <com.airbnb.lottie.LottieAnimationView
    android:id="@+id/animation_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:lottie_fileName="notification_bell.json"
    app:lottie_loop="true"
    app:lottie_autoPlay="true" />
</RelativeLayout>

Binary XML file line #1: Binary XML file line #1: Error inflating class com.airbnb.lottie.LottieAnimationView

Please clean and rebuild, or delete the bin and obj folder to restart your VS, it should work.

Answer 4

User367180 posted

Hey @robbit ,

Firstly, thanks so much for your response once again.

The code I added was AFTER me editing, but I did do it exactly as you originally said to and it gave me that Binary error for some reason. I had tried cleaning, rebuilding, restarting, and more but nothing worked.

What's even more weird is that I LITERALLY did nothing but just uncommented my code in the old file to try again and screenshot the error for you, but now it's working! This is extremely strange...

Regardless, I can't thank you enough for your help as I've been struggling with Lottie for a week, until now. Very appreciative! Have a good one!