我想得到两个日期之间的月数。日期是某人的生日和当前日期。所以我得到的是两个日期之间的年数,而不是月数..
假设我的日期是 06/09/2011 和 06/11/2012。所以我希望答案是 1yr 2mths。我得到的是年份,但不是月份。请帮助。下面是获取年数的代码
public int getAge(Date dateOfBirth) {
today = Calendar.getInstance();
Calendar birthDate = Calendar.getInstance();
birthDate.setTime(dateOfBirth);
if (birthDate.after(today)) {
throw new IllegalArgumentException("Can't be born in the future");
}
age = today.get(Calendar.YEAR) - birthDate.get(Calendar.YEAR);
month = today.get(Calendar.MONTH) - birthDate.get(Calendar.MONTH);
if ( (birthDate.get(Calendar.DAY_OF_YEAR) - today.get(Calendar.DAY_OF_YEAR) > 3) ||
(birthDate.get(Calendar.MONTH) > today.get(Calendar.MONTH ))){
days = birthDate.get(Calendar.DAY_OF_MONTH) - today.get(Calendar.DAY_OF_MONTH);
age--;
Toast.makeText(getApplicationContext(), "inside if", Toast.LENGTH_SHORT).show();
Log.e("month is",month+"");
Log.e("Days",days+ " left");
}else if ((birthDate.get(Calendar.MONTH) == today.get(Calendar.MONTH )) &&
(birthDate.get(Calendar.DAY_OF_MONTH) > today.get(Calendar.DAY_OF_MONTH ))){
Toast.makeText(getApplicationContext(), "inside else if", Toast.LENGTH_SHORT).show();
age--;
}
return age;
最佳答案
我最近创建了一个演示并上传了 here .
它正在使用 JodaTime
高效结果的库。
希望有用。
截图:
代码:
主 Activity .java
public class MainActivity extends Activity {
private SimpleDateFormat mSimpleDateFormat;
private PeriodFormatter mPeriodFormat;
private Date startDate;
private Date endDate;
private Date birthDate;
private TextView tvStartDate,tvEndDate,tvDifferenceStandard,tvDifferenceCustom,tvBirthDate,tvAgeStandard,tvAgeCustom;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
//determine dateDiff
Period dateDiff = calcDiff(startDate,endDate);
tvDifferenceStandard.setText(PeriodFormat.wordBased().print(dateDiff));
tvDifferenceCustom.setText( mPeriodFormat.print(dateDiff));
//determine age
Period age = calcDiff(birthDate,new Date());
tvAgeStandard.setText(PeriodFormat.wordBased().print(age));
tvAgeCustom.setText( mPeriodFormat.print(age));
}
private void init() {
//ui
tvStartDate = (TextView)findViewById(R.id.tvStartDate);
tvEndDate = (TextView)findViewById(R.id.tvEndDate);
tvDifferenceStandard = (TextView)findViewById(R.id.tvDifferenceStandard);
tvDifferenceCustom = (TextView)findViewById(R.id.tvDifferenceCustom);
tvBirthDate = (TextView)findViewById(R.id.tvBirthDate);
tvAgeStandard = (TextView)findViewById(R.id.tvAgeStandard);
tvAgeCustom = (TextView)findViewById(R.id.tvAgeCustom);
//components
mSimpleDateFormat = new SimpleDateFormat("dd/MM/yy");
mPeriodFormat = new PeriodFormatterBuilder().appendYears().appendSuffix(" year(s) ").appendMonths().appendSuffix(" month(s) ").appendDays().appendSuffix(" day(s) ").printZeroNever().toFormatter();
try {
startDate = mSimpleDateFormat.parse(tvStartDate.getText().toString());
endDate = mSimpleDateFormat.parse(tvEndDate.getText().toString());
birthDate = mSimpleDateFormat.parse(tvBirthDate.getText().toString());
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private Period calcDiff(Date startDate,Date endDate)
{
DateTime START_DT = (startDate==null)?null:new DateTime(startDate);
DateTime END_DT = (endDate==null)?null:new DateTime(endDate);
Period period = new Period(START_DT, END_DT);
return period;
}
}
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Date Diff Calculator"
android:textStyle="bold"
android:gravity="center"
android:background="@android:color/darker_gray"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Start Date:" />
<TextView
android:id="@+id/tvStartDate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="06/09/2011" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="End Date:" />
<TextView
android:id="@+id/tvEndDate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="29/10/2013" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Difference (Standard)" />
<TextView
android:id="@+id/tvDifferenceStandard"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="result" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Difference (Custom)" />
<TextView
android:id="@+id/tvDifferenceCustom"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="result" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Age Calculator"
android:textStyle="bold"
android:gravity="center"
android:background="@android:color/darker_gray"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Birth Date:" />
<TextView
android:id="@+id/tvBirthDate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="01/09/1989" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Age (Standard)" />
<TextView
android:id="@+id/tvAgeStandard"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="result" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Age (Custom)" />
<TextView
android:id="@+id/tvAgeCustom"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="result" />
注意:
1)
不要忘记添加 JodaTime 库
到你的项目
2)
正如您在布局文件中看到的那样,我使用固定值 "Start Date","End Date"来计算日期差异
和固定值 "Birth Date"来计算年龄
。您可以用您的动态值替换它
。
关于java - 如何计算年龄或java中两个日期之间的差异,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20421841/