所以，这里是来自主活动（主屏幕）的代码，如果你点击播放随机活动（一个测验问题）就会出现。问题是，我试图将一个整数默认分数传递给问题#1，其中分数将为 5（这是默认值）。
如果用户点击了错误的按钮，它会将用户导航到问题#2，而对于问题#2，分数将为负2，小于2。
int defaultScore = 51;
// start Play Intent
public void onPlay(View view){
Random r = new Random();
int XML_random = r.nextInt(5)+1; // 5 different Quiz XML files
Intent startQuiz = new Intent();
switch(XML_random){
case 1:
startQuiz.setClass(view.getContext(), Quiz_1.class);
break;
case 2:
startQuiz.setClass(view.getContext(), Quiz_2.class);
break;
case 3:
startQuiz.setClass(view.getContext(), Quiz_3.class);
break;
case 4:
startQuiz.setClass(view.getContext(), Quiz_4.class);
break;
case 5:
startQuiz.setClass(view.getContext(), Quiz_5.class);
break;
} // end of the Random switch
startQuiz.putExtra("passScore", defaultScore);
startActivity(startQuiz);
}
所以，接下来如果选择一个随机活动，那么它的分数将为 5，因为对于第一个问题，我希望用户从 5 作为开始。所以，这里是一个活动（问题#1），如果用户点击了错误的按钮，那么问题#2 就会出现。而对于这个活动，分数将是负2。因为用户选择了错误的答案。
问题 1 - 用户点击了错误的按钮：
public class Quiz_1 extends Activity {
TextView textviewScore;
int current_score = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.quiz_1);
textviewScore = (TextView) findViewById(R.id.q_result); // declaring the TextView
Bundle extras = getIntent().getExtras();
if (extras != null)
{
current_score = extras.getInt("passScore");
}
textviewScore.setText(String.valueOf(current_score));
} // end of onCreate
public void on_quiz_1_wrong(View view){ // button clicked the wrong answer
current_score = current_score - 2;
Intent quiz1 = new Intent(this, Quiz_2.class);
startActivity(quiz1);
quiz1.putExtra("passNewScore", current_score);
}
这是问题 #2，对于这项活动，我希望分数为负 2。
public class Quiz_2 extends Activity {
TextView textviewScore;
int current_score = 0;
int getScore=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.quiz_2);
textviewScore = (TextView) findViewById(R.id.q_result); // declaring the TextView
Bundle extras = getIntent().getExtras();
if (extras != null)
{
current_score = extras.getInt("passScore");
getScore = extras.getInt("passNewScore");
}
current_score = current_score - getScore;
textviewScore.setText(String.valueOf(current_score));
} // end of onCreate