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POHow to create a back button in a quiz app
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  1. POHow to create a back button in a quiz app
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    copied!<p>so I want to create a back button in my quiz app. The questions all come from a SQ database. I want the button to go to the previous question with out messing up the counter. Any idea how I'd do this??? :-) Thanks for looking. My code is </p> <pre><code>import java.util.List; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.RadioButton; import android.widget.TextView; import com.tmm.android.chuck.quiz.GamePlay; import com.tmm.android.chuck.quiz.Question; import com.tmm.android.chuck.util.Utility; /** * @author Derek McAuley * */ public class QuestionActivity extends Activity implements OnClickListener{ private Question currentQ; private GamePlay currentGame; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.question); /** * Configure current game and get question */ currentGame = ((ChuckApplication)getApplication()).getCurrentGame(); currentQ = currentGame.getNextQuestion(); Button nextBtn = (Button) findViewById(R.id.nextBtn); nextBtn.setOnClickListener(this); /** * Update the question and answer options.. */ setQuestions(); } /** * Method to set the text for the question and answers from the current games * current question */ private void setQuestions() { //set the question text from current question String question = Utility.capitalise(currentQ.getQuestion()); TextView qText = (TextView) findViewById(R.id.question); qText.setText(question); //set the available options List&lt;String&gt; answers = currentQ.getQuestionOptions(); TextView option1 = (TextView) findViewById(R.id.answer1); option1.setText(Utility.capitalise(answers.get(0))); TextView option2 = (TextView) findViewById(R.id.answer2); option2.setText(Utility.capitalise(answers.get(1))); TextView option3 = (TextView) findViewById(R.id.answer3); option3.setText(Utility.capitalise(answers.get(2))); TextView option4 = (TextView) findViewById(R.id.answer4); option4.setText(Utility.capitalise(answers.get(3))); // below is the question counter which displays the current question number is the left corner. // it also displays the number of questions in the test. int total =currentGame.getNumRounds(); int to = currentGame.getRound(); TextView questionNum = (TextView) findViewById(R.id.textView1); questionNum.setText("Question " + to +"/" + total); } @Override public void onClick(View arg0) { //Log.d("Questions", "Moving to next question"); /** * validate a checkbox has been selected */ if (!checkAnswer()) return; /** * check if end of game */ if (currentGame.isGameOver()){ //Log.d("Questions", "End of game! lets add up the scores.."); //Log.d("Questions", "Questions Correct: " + currentGame.getRight()); //Log.d("Questions", "Questions Wrong: " + currentGame.getWrong()); Intent i = new Intent(this, EndgameActivity.class); startActivity(i); finish(); } else{ Intent i = new Intent(this, QuestionActivity.class); startActivity(i); finish(); } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_BACK : return true; } return super.onKeyDown(keyCode, event); } /** * Check if a checkbox has been selected, and if it * has then check if its correct and update gamescore */ private boolean checkAnswer() { String answer = getSelectedAnswer(); if (answer==null){ //Log.d("Questions", "No Checkbox selection made - returning"); return false; } else { //Log.d("Questions", "Valid Checkbox selection made - check if correct"); if (currentQ.getAnswer().equalsIgnoreCase(answer)) { //Log.d("Questions", "Correct Answer!"); currentGame.incrementRightAnswers(); } else{ //Log.d("Questions", "Incorrect Answer!"); currentGame.incrementWrongAnswers(); } return true; } } /** * */ private String getSelectedAnswer() { RadioButton c1 = (RadioButton)findViewById(R.id.answer1); RadioButton c2 = (RadioButton)findViewById(R.id.answer2); RadioButton c3 = (RadioButton)findViewById(R.id.answer3); RadioButton c4 = (RadioButton)findViewById(R.id.answer4); if (c1.isChecked()) { return c1.getText().toString(); } if (c2.isChecked()) { return c2.getText().toString(); } if (c3.isChecked()) { return c3.getText().toString(); } if (c4.isChecked()) { return c4.getText().toString(); } return null; } } </code></pre>
 

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