Unpack a file from assets.

UnpackAssets.java

Timber.tag(TAG).i("Copying new binary...");
AssetManager assets = getContext().getAssets();

InputStream in = assets.open(assetName);
FileOutputStream f;
f = getContext().openFileOutput(mBinaryConfig.getBaseBinaryName(), Context.MODE_PRIVATE);
byte[] buffer = new byte[1024];
int len1;
while ((len1 = in.read(buffer)) > 0) {
    f.write(buffer, 0, len1);
}
f.close();
Timber.tag(TAG).i("binary has been successfully created.");