var sprite5 = textureLoader.load(
'/three.js/main/textures/sprites/ball2.png' );

var sprite5 = textureLoader.load(
'file://android_asset/three.js/main/textures/sprites/ball2.png' );

var sprite5 = textureLoader.load(
'file:///android_asset/three.js/main/textures/sprites/ball2.png' );

var col = new THREE.Color(0x001a66);
scene.background = new THREE.Color(col)

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    String myurl ="file:///android_asset/three.js/main/index.html";
    WebView view =(WebView) this.findViewById(R.id.webView);
    view.getSettings().setJavaScriptEnabled(true);
    view.loadUrl(myurl);
}

}