Instagram-like floating hearts view for android.

Demo APK: https://petersamokhin.com/files/projects/fh/fh.apk

Install

1. Add jitpack repo to your project-level build.gradle:

   allprojects {
    repositories {
        // other repos
        maven { url 'https://jitpack.io' }
    }
   }
   

2. Add library to your dependencies:

   dependencies {
    implementation 'com.github.petersamokhin:floating-hearts-view:$ACTUAL_VERSION'
   }
   

   Latest version: https://github.com/petersamokhin/floating-hearts-view/releases

Usage

Configure renderer:

val config = HeartsRenderer.Config(
            5f,                        // The max amplitude of the flight along the X axis
            0.15f,                     // Duration of the flying animation will be multiplied by this value (lower — faster)
            2f                         // Heart size coefficient 
)
heartsView.applyConfig(config)

Or in your XML layout file:

<com.petersamokhin.android.floatinghearts.HeartsView
            android:id="@+id/heartsView"
            android:layout_width="match_parent"
            android:layout_height="330dp"
            app:x_max="3"
            app:size_coeff="2.5"
            app:floating_time_coeff="0.8" />

Make your model:

// Get bitmap from image by URL
// or simply convert from drawable, etc
val image = "https://cdn.shopify.com/s/files/1/1061/1924/products/Thinking_Face_Emoji_large.png"
val byteArray = URL(image).readBytes()
val bitmap = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.size)

val model = HeartsView.Model(
            0,                         // Unique ID of this image, used for Rajawali materials caching
            bitmap                     // Bitmap image
)

Let your image fly!

heartsView.emitHeart(model)

3rd party

Rajawali is the only one dependency. Inspired by Instagram/Snapchat/etc broadcasts.

Known issues

On some devices / on some Android versions NullPointerException may happen after new Material() call in HeartsRenderer. This causes because GLES20.glGetString( GLES20.GL_EXTENSIONS ); is returning null.

To fix this simply do not call emitHeart in first 300-500 ms after activity start.