SecurityCodeFragment.java

package com.khmelenko.lab.varis.fragment;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;

import com.khmelenko.lab.varis.R;

import butterknife.Bind;
import butterknife.ButterKnife;
import butterknife.OnClick;

/**
 * Security code fragment
 *
 * @author Dmytro Khmelenko
 */
public class SecurityCodeFragment extends Fragment {

    @Bind(R.id.auth_security_code)
    EditText mSecurityCode;

    private OnSecurityCodeAction mListener;

    /**
     * Creates new instance of the fragment
     *
     * @return Fragment instance
     */
    public static SecurityCodeFragment newInstance() {
        SecurityCodeFragment fragment = new SecurityCodeFragment();
        return fragment;
    }

    public SecurityCodeFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_security_code, container, false);
        ButterKnife.bind(this, view);
        return view;
    }

    @OnClick(R.id.auth_confirm_btn)
    public void startConfirmation() {
        if (TextUtils.isEmpty(mSecurityCode.getText())) {
            mSecurityCode.setError(getString(R.string.auth_invalid_security_code));
        } else {
            if (mListener != null) {
                mListener.onSecurityCodeInput(mSecurityCode.getText().toString());
            }
        }
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            mListener = (OnSecurityCodeAction) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    /**
     * Listener on security code
     */
    public interface OnSecurityCodeAction {

        /**
         * Calles on inputted security code
         *
         * @param securityCode Security code
         */
        void onSecurityCodeInput(String securityCode);
    }

}