我是Android中的新手从播放类我想在一个Txt文件中存储Question ArrayList和AnswerArrayList，但我之前没有这样做，并且不确定如何做到这里..这里是下面的java代码：< br />
爪哇
public class play extends Activity {
private Question currentQuestion;
private int currentQuestionIndex;
private ArrayList<Button> questionButton;
private TextView questionstextview;
private TextView questionnumber;
private TextView playerfeedback;
public static TextView displayscore;
public static int score;
private List<Question> QuestionList;
private int answerchoice;
public static int totalanswer;
public static int correctanswer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.play);
Log.i("playclass", "this is play class running");
questionButton = new ArrayList<Button>();
questionButton.add((Button) findViewById (R.id.answerbutton1));
questionButton.add((Button) findViewById (R.id.answerbutton2));
questionButton.add((Button) findViewById (R.id.answerbutton3));
questionButton.add((Button) findViewById (R.id.answerbutton4));
currentQuestion = null;
currentQuestionIndex = 0;
QuestionList = new ArrayList<Question>();
ArrayList <String> answer = new ArrayList<String>();
answer.add("8");
answer.add("9");
answer.add("3");
answer.add("1");
QuestionList.add(new Question("what is 4+4", answer, 0));
ArrayList <String> answer1 = new ArrayList<String>();
answer1.add("17");
answer1.add("20");
answer1.add("15");
answer1.add("14");
QuestionList.add(new Question("what is 7+8?", answer1, 3));
ArrayList <String> answer2 = new ArrayList<String>();
answer2.add("20");
answer2.add("30");
answer2.add("19");
answer2.add("34");
QuestionList.add(new Question("what is 10+10?", answer2, 0));
ArrayList <String> answer3 = new ArrayList<String>();
answer3.add("12");
answer3.add("11");
answer3.add("13");
answer3.add("14");
QuestionList.add(new Question("what is 6+6?", answer3, 0));
ArrayList <String> answer4 = new ArrayList<String>();
answer4.add("6");
answer4.add("5");
answer4.add("4");
answer4.add("7");
QuestionList.add(new Question("what is 4+3?", answer4, 3));
ArrayList <String> answer5 = new ArrayList<String>();
answer5.add("7");
answer5.add("9");
answer5.add("10");
answer5.add("11");
QuestionList.add(new Question("what is 3+7?", answer5, 2));
questionstextview = (TextView) findViewById (R.id.questionstextview);
questionnumber = (TextView) findViewById (R.id.questionnumber);
displayscore = (TextView) findViewById (R.id.displayscore);
displayscore.setText(Integer.toString(score));
StartTrivia();
}
public void ButtonPress (View answerButton){
MediaPlayer soundfx = MediaPlayer.create(getApplicationContext(), R.raw.click);
soundfx.start();
for (int i=0; i< questionButton.size(); i++)
{
if (questionButton.get(i) ==answerButton)
{
if (i==currentQuestion.getAnswerIndex())
{
score+=5;
displayscore.setText(Integer.toString(score));
correctanswer++;
totalanswer++;
Toast.makeText(getApplicationContext(), "Correct!", Toast.LENGTH_SHORT).show();
}
else{
totalanswer++;
Toast.makeText(getApplicationContext(), "Incorrect!", Toast.LENGTH_SHORT).show();
Log.i("playclass", "after incorrect toast");
}
currentQuestionIndex++;
Log.i("playclass", "after currentQuestionIndex++; ");
if (currentQuestionIndex < QuestionList.size()){
Log.i("playclass", "after currentQuestionIndex < QuestionList.size() ");
StartTrivia();
Log.i("playclass", "after StartTrivia in if statement ");
}
else{
Intent result = new Intent (this, finalscreen.class);
startActivity(result);
Log.i("playclass", "after IntentResult ");
}
break;
}
}
}
public void StartTrivia(){
Log.i("playclass", "running StartTrivia() " + currentQuestionIndex);
currentQuestion = QuestionList.get(currentQuestionIndex);
questionstextview.setText(currentQuestion.getquestion());
questionnumber.setText(Integer.toString(currentQuestionIndex+0));
for (int i = 0; i < questionButton.size(); i++)
{
String ans = currentQuestion.getanswer().get(i);
questionButton.get(i).setText(ans);
}
}
}