The code of triangulation animation is ported from the SVG triangulation (JavaScript).

(Gif Picture)

In your build.gradle:

repositories {
    maven { url "https://jitpack.io" }
}
dependencies {
    compile "com.github.nekocode:TriangulationDrawable:${lastest-version}"
}

Obtain an TriangulationDrawable with a bacground color parameter.

final TriangulationDrawable drawable = new TriangulationDrawable(0xFFEF0E39);
findViewById(android.R.id.content).setBackground(drawable);

And then call the start() method for starting the triangulation animation.

drawable.start()