com.raspi.chatapp.ui.password.PinFragment.java Source code

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Here is the source code for com.raspi.chatapp.ui.password.PinFragment.java

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/*
 * Copyright 2016 Niklas Schelten
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.raspi.chatapp.ui.password;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

import com.raspi.chatapp.R;

/**
 * A simple {@link Fragment} subclass.
 * Activities that contain this fragment must implement the
 * {@link PinFragment.OnFragmentInteractionListener} interface
 * to handle interaction events.
 * Use the {@link PinFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class PinFragment extends Fragment {
    private OnFragmentInteractionListener mListener;

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

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @return A new instance of fragment PinFragment.
     */
    public static PinFragment newInstance() {
        PinFragment fragment = new PinFragment();
        fragment.setArguments(new Bundle());
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public void onResume() {
        super.onResume();

        EditText pin = (EditText) getView().findViewById(R.id.pin);
        // always focus the pinEditText
        pin.setFocusableInTouchMode(true);
        pin.requestFocus();
        InputMethodManager inputMethodManager = (InputMethodManager) getActivity()
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        inputMethodManager.showSoftInput(pin, InputMethodManager.SHOW_IMPLICIT);
        pin.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                // if the text reached a length of 4 chars check the password and
                // clear the editText
                if (s.length() == 4) {
                    char[] pwd = new char[4];
                    s.getChars(0, 4, pwd, 0);
                    mListener.onPasswordEntered(pwd);
                    s.clear();
                    // otherwise make sure that the invalid pwd textView is gone
                } else
                    getView().findViewById(R.id.password_invalid).setVisibility(View.GONE);
            }
        });
    }

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

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString() + " must implement OnChatFragmentInteractionListener");
        }
    }

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

    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p/>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        void onPasswordEntered(char[] pwd);
    }
}