我创建了一个带有一些简单问题的数学问答游戏，问题是问题一遍又一遍地重复，是否有可能检查一个问题是否重复，是否重复一次然后问另一个问题，然后结束回答所有问题后进行游戏。我不希望重复任何问题。如何实现？请帮助。这是我的代码。
public class MathsEasy extends Activity {
Button answer1,answer2,answer3,answer4;
TextView score,question;
private MathsEasyQuestions mQuestions = new MathsEasyQuestions();
private String mAnswer;
private int mScore = 0;
private int mQuestionsLength = mQuestions.mQuestions.length;
Random r;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setContentView(R.layout.maths_easy);
r = new Random();
answer1 = (Button)findViewById(R.id.answer1);
answer2 = (Button)findViewById(R.id.answer2);
answer3 = (Button)findViewById(R.id.answer3);
answer4 = (Button)findViewById(R.id.answer4);
score = (TextView)findViewById(R.id.score);
question = (TextView)findViewById(R.id.question);
score.setText("Score: " + mScore);
updateQuestion(r.nextInt(mQuestionsLength));
answer1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (answer1.getText() == mAnswer){
mScore++;
score.setText("Score: " + mScore);
updateQuestion(r.nextInt(mQuestionsLength));
updateQuestion(r.nextInt(mQuestionsLength));
} else {
gameOver();
}
}
});
answer2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (answer2.getText() == mAnswer){
mScore++;
score.setText("Score: " + mScore);
updateQuestion(r.nextInt(mQuestionsLength));
updateQuestion(r.nextInt(mQuestionsLength));
} else {
gameOver();
}
}
});
answer3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (answer3.getText() == mAnswer){
mScore++;
score.setText("Score: " + mScore);
updateQuestion(r.nextInt(mQuestionsLength));
updateQuestion(r.nextInt(mQuestionsLength));
} else {
gameOver();
}
}
});
answer4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (answer4.getText() == mAnswer){
mScore++;
score.setText("Score: " + mScore);
updateQuestion(r.nextInt(mQuestionsLength));
updateQuestion(r.nextInt(mQuestionsLength));
} else {
gameOver();
}
}
});
}
private void updateQuestion(int num){
question.setText(mQuestions.getQuestion(num));
answer1.setText(mQuestions.getChoice1(num));
answer2.setText(mQuestions.getChoice2(num));
answer3.setText(mQuestions.getChoice3(num));
answer4.setText(mQuestions.getChoice4(num));
mAnswer = mQuestions.getCorrectAnswer(num);
}
private void gameOver(){
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(MathsEasy.this);
alertDialogBuilder
.setMessage("Game Over! Your Score Is " + mScore + " points")
.setCancelable(false)
.setPositiveButton("New Game", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
startActivity(new Intent(getApplicationContext(),MathsEasy.class));
}
})
.setNegativeButton("Exit", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
startActivity(new Intent(getApplicationContext(),Mathematics.class));
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
@Override
public void onBackPressed() {
Intent intent = new Intent(this,Mathematics.class);
startActivity(intent);
}
}
public class MathsEasyQuestions {
public String mQuestions[]={
"2+2 = ?",
"3+2 = ?",
"4+2 = ?",
"9 x 2 = ?",
"56-22 = ?",
"100 ÷ 5 = ?",
"I have 300 stickes I gave 199 to my friend. how many do I have now ?",
"1+2+3+4+5+6+7+8+9 = ?",
"I am 5 years older than my brother.My brother is 14 years old.How old am I?",
"64 turtles. A quarter of them swim away. How many are left?",
"7 birds are on a fence. 3 fly away. How many are left?",
"What is 10 multiplied by 10?",
"Four times five is?"
};
public String mChoices[][] = {
{"1","6","4","9"},
{"3","8","2","5"},
{"6","2","7","1"},
{"12","18","16","15"},
{"27","42","34","39"},
{"20","10","50","25"},
{"203","114","122","101"},
{"29","45","35","56"},
{"18","20","19","22"},
{"32","34","40","48"},
{"4","10","5","2"},
{"110","100","10","90"},
{"20","25","15","24"},
};
public String mCorrectAnswer[]={"4","5","6","18","34","20","101","45","19","48","4","100","20"};
public String getQuestion(int a){
String question = mQuestions[a];
return question;
}
public String getChoice1(int a){
String choice = mChoices[a][0];
return choice;
}
public String getChoice2(int a){
String choice = mChoices[a][1];
return choice;
}
public String getChoice3(int a){
String choice = mChoices[a][2];
return choice;
}
public String getChoice4(int a){
String choice = mChoices[a][3];
return choice;
}
public String getCorrectAnswer(int a){
String answer = mCorrectAnswer[a];
return answer;
}
}