maven {
    url  "http://dl.bintray.com/dv00d00/maven"
}

dependencies {
    ...
    compile 'com.virgilsecurity.android:sdk:1.0.6'
    ...
}

final Connection myConnection = new Connection("APP_TOKEN", URI.create("https://keys.virgilsecurity.com/v2/"));
final PublicKeysClient myPublicKeysClient = new PublicKeysClient(myConnection);

myPublicKeysClient.search("[email protected]", new ResponseCallback<PublicKey>() {
    @Override
    public void onResult(@Nullable PublicKey object) {
        final String data = "Encrypt Me, Pleeeeeeease.";
        final VirgilCipher cipher = new VirgilCipher();
        final byte[] encryptedData = cipher.encrypt(data.getBytes(Charset.forName("UTF-8")));
        final VirgilSigner virgilSigner = new VirgilSigner();
        final byte[] sign = virgilSigner.sign(encryptedData, myPrivateKetBytes);
    }

    @Override
    public void onError(Error error) {
        Toast.makeText(MainActivity.this, error.getMessage(), Toast.LENGTH_SHORT).show();
    }
});