这是AgeCalculation.java
package com.example.iqtest;
public class AgeCalculation extends Activity implements OnTouchListener
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_age_calculation);
mDate = (EditText) findViewById(R.id.edDate);
age = (EditText) findViewById(R.id.edAge);
calage = (Button) findViewById(R.id.btnCalculateAge);
go = (Button) findViewById(R.id.button1);
category=(EditText) findViewById(R.id.category);
final Calendar c = Calendar.getInstance();
Year = c.get(Calendar.YEAR);
Month = c.get(Calendar.MONTH);
Day = c.get(Calendar.DAY_OF_MONTH);
mDate.setOnTouchListener(this);
calage.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){
Intent i = new Intent(AgeCalculation.this,ResultActivity.class);
i.putExtra("ti",timetotake);
startActivity(i);
Calendar now= Calendar.getInstance();
Calendar calendar = Calendar.getInstance();
calendar.set(Year, Month, Day);
int years = now.get(Calendar.YEAR) - calendar.get(Calendar.YEAR);
int months = now.get(Calendar.MONTH) - calendar.get(Calendar.MONTH);
int days = now.get(Calendar.DAY_OF_MONTH) - calendar.get(Calendar.DAY_OF_MONTH);
if (days < 0){
months --;
days +=now.getActualMaximum(Calendar.DAY_OF_MONTH);
}
if (months < 0){
years --;
months +=12;
}
String yearsold = years+" YEARS "+months+ " MONTHS "+days+" DAYS"+" "+"OLD";
age.setText(yearsold);
if(years>=0 && years<=10)
{
opt=0;
}else if(years>=11 && years<=15)
{
opt=1;
}else if(years>=16 && years<=30)
{
opt=2;
}
else if(years>=31 && years<=50)
{
opt=3;
}else if(years>=51 && years<=120)
{
opt=4;
}else
{
opt=5;
}
switch (opt) {
case 0:
start=0;
temp=" KIDS";
timetotake=480;
break;
case 1:
start=20;
temp=" CHILDREN";
timetotake=480;
break;
case 2:
start=40;
temp="TEENAGERS";
timetotake=540;
break;
case 3:
start=60;
temp="ADULTS";
timetotake=540;
break;
case 4:
start=80;
temp="ELDERS";
timetotake=600;
break;
case 5:
temp="ALIENS!!";
break;
default:
temp="ALIENS!!";
break;
}
category.setText(temp);
go.setText("GO"+" "+"TO"+" "+temp+" "+"IQTEST");
}
});
go = (Button) findViewById(R.id.buttongo);
go.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
Intent intent = new /*Here Iam using two intents to send data to two different activities QuizActivity and result activity*/Intent(AgeCalculation.this,QuizActivity.class);
intent.putExtra("start", start);
startActivity(intent);
Intent i = new Intent(AgeCalculation.this,ResultActivity.class);
i.putExtra("ti",timetotake);
startActivity(i);
}
});
}
@Override
protected Dialog onCreateDialog(int id)
{
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(
this, DateSetListener, Year, Month, Day);
}
return null;
}
private DatePickerDialog.OnDateSetListener DateSetListener =
new DatePickerDialog.OnDateSetListener()
{
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
Year = year;
Month = monthOfYear;
Day = dayOfMonth;
String sdate = lp(Day + "", "0", 2)+ " " + montharray[Month] + " " + Year;
mDate.setText(sdate);
}
};
private String lp(String sc, String sp, int len) {
String sr = sc;
for (int i = sr.length(); i < len; i++) {
sr = sp + sr;
}
return new String(sr);
}
@Override
public boolean onTouch(View arg0, MotionEvent arg1) {
showDialog(DATE_DIALOG_ID);
return false;
}
}
这是QuizActivity.java
package com.example.iqtest;
public class QuizActivity extends Activity {
List<Question> quesList;
int score,qid,temp;
int secs;
Question currentQ;
TextView txtQuestion;
RadioButton rda, rdb, rdc,rdd,rde;
Button butNext,agecal;
private Button pause;
private TextView timerValue;
private long startTime = 0L;
private Handler customHandler = new Handler();
long timeInMilliseconds = 0L;
long timeSwapBuff = 0L;
long updatedTime = 0L;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quiz);
timerValue = (TextView) findViewById(R.id.textView2);
startTime = SystemClock.uptimeMillis();
customHandler.postDelayed(updateTimerThread, 0);
pause = (Button) findViewById(R.id.pause);
pause.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
timeSwapBuff += timeInMilliseconds;
customHandler.removeCallbacks(updateTimerThread);
// or View.INVISIBLE depending on what you want to do
pause.setVisibility(View.INVISIBLE);
Intent i = new Intent(QuizActivity.this,Timeplease.class);
startActivity(i);
finish();
}
});
Bundle b = getIntent().getExtras();
qid=b.getInt("start");
temp=qid;
agecal = (Button) findViewById(R.id.buttoncalage);
agecal.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
Intent i = new Intent(QuizActivity.this,AgeCalculation.class);
startActivity(i);
finish();
}
});
DbHelper db=new DbHelper(this);
quesList=db.getAllQuestions();
currentQ=quesList.get(qid);
txtQuestion=(TextView)findViewById(R.id.textView1);
rda=(RadioButton)findViewById(R.id.radio0);
rdb=(RadioButton)findViewById(R.id.radio1);
rdc=(RadioButton)findViewById(R.id.radio2);
rdd=(RadioButton)findViewById(R.id.radio3);
rde=(RadioButton)findViewById(R.id.radio4);
butNext=(Button)findViewById(R.id.button1);
setQuestionView();
butNext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
RadioGroup grp=(RadioGroup)findViewById(R.id.radioGroup1);
RadioButton answer=(RadioButton)findViewById(grp.getCheckedRadioButtonId());
if(currentQ.getanswer().equals(answer.getText()))
{
score++;
}
if(qid<(temp+20)){
currentQ=quesList.get(qid);
setQuestionView();
}else{
Intent intent = new Intent(QuizActivity.this, ResultActivity.class);
Bundle b = new Bundle();
b.putInt("score", score);
b.putInt("time",secs);
//Your score
intent.putExtras(b); //Put your score to your next Intent
startActivity(intent);
finish();
}
}
});
}
private void setQuestionView()
{
txtQuestion.setText(currentQ.getquestion());
rda.setText(currentQ.getopta());
rdb.setText(currentQ.getoptb());
rdc.setText(currentQ.getoptc());
rdd.setText(currentQ.getoptd());
rde.setText(currentQ.getopte());
qid++;
}
private Runnable updateTimerThread = new Runnable() {
public void run() {
timeInMilliseconds = SystemClock.uptimeMillis() - startTime;
updatedTime = timeSwapBuff + timeInMilliseconds;
secs = (int) (updatedTime / 1000);
int mins = secs / 60;
secs = secs % 60;
int milliseconds = (int) (updatedTime % 1000);
timerValue.setText("" + mins + ":" + String.format("%02d", secs) + ":"+ String.format("%03d", milliseconds));customHandler.postDelayed(this, 0);
}
};
}
这是ResultActivity.java
package com.example.iqtest;
public class ResultActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_result);
//get rating bar object
//get text view
TextView t=(TextView)findViewById(R.id.textResult);
//get score
Bundle b = getIntent().getExtras();
int score= b.getInt("score");
int timetaken= b.getInt("time");
Bundle a = getIntent().getExtras();
int timetobetaken= a.getInt("ti");
int iqscore=score*160/20*timetobetaken/timetaken;
//display score
t.setText("YOUR SCORE IS"+ " "+ iqscore);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.result, menu);
return true;
}
}
这是Timeplease.java
package com.example.iqtest;
public class Timeplease extends Activity {
Button back;
Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context=this;
setContentView(R.layout.activity_timeplease);
addListenerOnButton();
}
public void addListenerOnButton()
{
back = (Button) findViewById(R.id.buttonback);
back.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
Intent i = new Intent(context,QuizActivity.class);
startActivity(i);
finish();
}
});
}
}
答案 0 :(得分：0)
执行此行代码后，
Intent i = new Intent(AgeCalculation.this,ResultActivity.class);
i.putExtra("ti",timetotake);
startActivity(i);
ResultActivity得到渲染。您的AgeCalculation中的其他代码行不会被执行。因此，您在ResultActivity类中期望的值将为null。
这可能是崩溃的原因。
另外，检查logcat，它会告诉你导致崩溃的代码行。
答案 1 :(得分：0)
在AgeCalculation活动中，您只传递Intent中的值，因此您只能获得使用Intent intent = getIntent();的值。您无法从Bundle获取值，因为您尚未在Bundle中添加值。
要获取Bundle的值，您可以使用Bundle b = getIntent().getExtras();从捆绑中获取值。
试试如下：
Bundle b = getIntent().getExtras();
if(b.containsKey("score") || b.containsKey("time"))
{
int score= b.getInt("score");
int timetaken= b.getInt("time");
}
Intent intent = getIntent();
int timetobetaken=intent.getIntExtra("ti",0);
在您的AgeCalculation课程中，您同时开始按下go按钮上的两项活动，这可能会导致问题，因为您将结果传递给两项活动。
同样在你的QuizActivity课程中，从意图中获取的值不是来自Bundle，如下所示：
Intent b = getIntent();
qid=b.getIntExtra("start",0);
<强>编辑：
在timetotake活动中将public static变量设为AgeCalculation
public static int timetotake;
然后在ResultActivity中访问它，如下所示：
int timetobetaken= AgeCalculation.timetotake;