Java tutorial
/* Copyright 2014 Profesores y alumnos de la asignatura Informtica Mvil de la EPI de Gijn 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 es.uniovi.imovil.fcrtrainer; import java.util.Date; import org.json.JSONException; import es.uniovi.imovil.fcrtrainer.highscores.HighscoreManager; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.content.DialogInterface; import android.os.Bundle; import android.text.method.DigitsKeyListener; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; /** * Ejercicio a modo de prueba que no hace nada particular, solo mostrar una * etiqueta. TODO: -save instance (rotation) ; gamemode */ public class BinaryExerciseFragment extends BaseExerciseFragment implements OnClickListener { private static final int POINTS_FOR_QUESTION = 10; private static final int MAX_QUESTIONS = 5; private static final long GAME_DURATION_MS = 5 * 1000 * 60; // 5min private boolean won = false; private BinaryConverter binaryConverter = new BinaryConverter(); private View rootView; private String currentQuestion; private boolean gameMode = false; private int points; private int currentQuestionCounter = 1; private enum MODE_GAME { BINARY_TO_DECIMAL, DECIMAL_TO_BINARY } private MODE_GAME modeGame = MODE_GAME.DECIMAL_TO_BINARY; public static BinaryExerciseFragment newInstance() { BinaryExerciseFragment fragment = new BinaryExerciseFragment(); return fragment; } public BinaryExerciseFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { rootView = inflater.inflate(R.layout.fragment_binary, container, false); /** * Set Listener * **/ Button check = (Button) rootView.findViewById(R.id.checkbutton); check.setOnClickListener(this); Button solution = (Button) rootView.findViewById(R.id.seesolution); solution.setOnClickListener(this); Button change = (Button) rootView.findViewById(R.id.change); change.setOnClickListener(this); newQuestion(); return rootView; } private void clearUserInput() { EditText userInput = (EditText) rootView.findViewById(R.id.answer); userInput.setText(""); } private void newQuestion() { int questionNumber = binaryConverter.createRandomNumber(); TextView question = (TextView) this.rootView.findViewById(R.id.numbertoconvert); if (modeGame == MODE_GAME.BINARY_TO_DECIMAL) currentQuestion = binaryConverter.convertDecimalToBinary(questionNumber); // returns binary // as string else this.currentQuestion = String.valueOf(questionNumber); question.setText(this.currentQuestion); } @Override public void onClick(View view) { if (view.getId() == R.id.checkbutton) { checkAnswer(); } if (view.getId() == R.id.seesolution) { showSolution(); } if (view.getId() == R.id.change) { clearUserInput(); changeMode(); changeViews(); newQuestion(); } } private void changeMode() { if (modeGame == MODE_GAME.BINARY_TO_DECIMAL) { modeGame = MODE_GAME.DECIMAL_TO_BINARY; } else { modeGame = MODE_GAME.BINARY_TO_DECIMAL; } } private void changeViews() { EditText answer = (EditText) rootView.findViewById(R.id.answer); TextView title = (TextView) rootView.findViewById(R.id.exercisetitle); if (modeGame == MODE_GAME.BINARY_TO_DECIMAL) { title.setText(getResources().getString(R.string.convert_to_dec)); // User input: 0 to 9 answer.setKeyListener(DigitsKeyListener .getInstance(getResources().getString(R.string.digits_available_decimal_binary))); answer.setHint(getResources().getString(R.string.hint_2_binary)); } else { title.setText(getResources().getString(R.string.convert_to_bin)); // DECIMAL TO BINARY: User input: only 0 or 1 answer.setKeyListener( DigitsKeyListener.getInstance(getResources().getString(R.string.digits_available_01_binary))); answer.setHint(getResources().getString(R.string.hint_binary)); } } private void showSolution() { EditText solution = (EditText) rootView.findViewById(R.id.answer); if (modeGame == MODE_GAME.DECIMAL_TO_BINARY) { solution.setText(convertToBinary(this.currentQuestion)); } else { solution.setText(convertToDecimal(this.currentQuestion)); } } private String convertToDecimal(String textToDecimal) { return this.binaryConverter.convertBinaryToDecimal(textToDecimal); } private String convertToBinary(String textToBinary) { return this.binaryConverter.convertDecimalToBinary(textToBinary); } private void checkAnswer() { String answer = answerFromUserInput(); // respond on empty inputs with error. if (answer.isEmpty()) { super.showAnimationAnswer(false); return; } boolean response = false; if (modeGame == MODE_GAME.DECIMAL_TO_BINARY) { response = checkBinaryAnswer(answer); } else { response = checkDecimalAnswer(answer); } super.showAnimationAnswer(response); // only create new Question if user has right input if (response) { if (this.gameMode) { gameModeControl(); } newQuestion(); clearUserInput(); } } private void gameModeControl() { increasePoints(POINTS_FOR_QUESTION); if (currentQuestionCounter >= MAX_QUESTIONS) { // won this.won = true; this.endGame(); } if (currentQuestionCounter < MAX_QUESTIONS && getRemainingTimeMs() <= 0) { // lost --> no time left... this.won = false; this.endGame(); } currentQuestionCounter++; } private void increasePoints(int val) { this.points = this.points + val; updatePointsTextView(this.points); } private void updatePointsTextView(int p) { TextView tvPoints = (TextView) rootView.findViewById(R.id.points); tvPoints.setText(getResources().getString(R.string.points) + " " + String.valueOf(p)); } private String answerFromUserInput() { EditText answerEditText = (EditText) rootView.findViewById(R.id.answer); String answer = answerEditText.getText().toString(); // System.out.println("answer: " + answer); return answer; } private boolean checkDecimalAnswer(String answer) { String answerConverted = convertToBinary(answer); if (answerConverted.equals(currentQuestion)) { return true; } return false; } private boolean checkBinaryAnswer(String answer) { // get answer without zeros in front to compare it easy. answer = binaryConverter.deleteStartingZeroesFromBinaryInput(answer); // Convert Question to binary String questionConverted = convertToBinary(this.currentQuestion); if (answer.equals(questionConverted)) { return true; } return false; } @Override public void startGame() { setGameDuration(GAME_DURATION_MS); // set starting points of textview updatePointsTextView(0); super.startGame(); updateToGameMode(); } private void updateToGameMode() { gameMode = true; newQuestion(); Button solution = (Button) rootView.findViewById(R.id.seesolution); solution.setVisibility(View.INVISIBLE); Button change = (Button) rootView.findViewById(R.id.change); change.setVisibility(View.INVISIBLE); TextView points = (TextView) rootView.findViewById(R.id.points); points.setVisibility(View.VISIBLE); } private void updateToTrainMode() { gameMode = false; Button solution = (Button) rootView.findViewById(R.id.seesolution); solution.setVisibility(View.VISIBLE); Button change = (Button) rootView.findViewById(R.id.change); change.setVisibility(View.VISIBLE); TextView points = (TextView) rootView.findViewById(R.id.points); points.setVisibility(View.INVISIBLE); } @Override public void cancelGame() { super.cancelGame(); updateToTrainMode(); } @Override void endGame() { //convert to seconds int remainingTimeInSeconds = (int) super.getRemainingTimeMs() / 1000; //every remaining second gives one extra point. this.points = (int) (this.points + remainingTimeInSeconds); if (this.won) savePoints(); dialogGameOver(); super.endGame(); updateToTrainMode(); reset(); } private void reset() { this.points = 0; this.currentQuestionCounter = 0; this.won = false; updatePointsTextView(0); } private void savePoints() { String username = getResources().getString(R.string.default_user_name); try { HighscoreManager.addScore(getActivity().getApplicationContext(), this.points, R.string.binary, new Date(), username); } catch (JSONException e) { e.printStackTrace(); } } // Simple GameOver Dialog private void dialogGameOver() { String message = getResources().getString(R.string.lost); if (this.won) { message = getResources().getString(R.string.won) + " " + getResources().getString(R.string.points) + " " + this.points; } Builder alert = new AlertDialog.Builder(getActivity()); alert.setTitle(getResources().getString(R.string.game_over)); alert.setMessage(message); alert.setPositiveButton("OK", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.cancel(); // nothing to do... } }); alert.show(); } }