Java tutorial
//package com.java2s; import android.content.res.AssetManager; import java.io.File; import java.io.IOException; import java.io.InputStream; public class Main { public static final String CARDBOARD_CONFIG_FOLDER = "Cardboard"; public static InputStream openAssetConfigFile(final AssetManager assetManager, final String filename) throws IOException { final String assetPath = new File(CARDBOARD_CONFIG_FOLDER, filename).getPath(); return assetManager.open(assetPath); } }