如何从Android中的日历中提取日期？

Question

我正在尝试在Android 中制作活动策划者应用程序。我已经添加了日历widget 现在我想要的是，每当用户单击添加事件按钮时，它将转到一个新的Activity 屏幕，并且用户在之前的Activity 的日历中选择的日期被准确地复制到文本字段。谁能帮我处理这段代码？
P.S.-我在主屏幕上添加了两个Fragments，一个用于日历，一个用于Buttons。

提前致谢。

Answer 1

如果您的意思是DatePicker，那么这就是您通过注册日期选择侦听器获得选定日期的方式

datePicker.init(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), new DatePicker.OnDateChangedListener() {

    @Override
    public void onDateChanged(DatePicker datePicker, int year, int month, int dayOfMonth) {
                    Log.d("Date", "Year=" + year + " Month=" + (month + 1) + " day=" + dayOfMonth);

                }
            });

或者您可以随时通过以下方式获取所选日期：

 DatePicker datePicker = (DatePicker) findViewById(R.id.datePicker1);
 int day = datePicker.getDayOfMonth();
 int month = datePicker.getMonth() + 1;
 int year = datePicker.getYear();

或者如果您使用的是CalendarView，那么一个简单的getDate() 调用就可以解决问题。现在从中提取日、月、年，并通过Intent 将其传递给下一个活动

如果您正在使用其他东西，请告诉我们。

Answer 2

// Declaration

 private int mDay;
 private int mMonth;
 private int mYear;


// Creating click listener of button

button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

     // Getting values from DatePicker

     DatePicker datePicker = (DatePicker) findViewById(R.id.datePicker1);
     mDay = datePicker.getDayOfMonth();
     mMonth = datePicker.getMonth() + 1;
     mYear = datePicker.getYear();

    // Here you have to write the code to start new Activity
    // If your second activity name is "SecondActivity" then use below code

    Intent intent = new Intent(FirstActivity.this,SecondActivity.class);

    // Put the date values to the intent
    intent.putExtra("Day",mDay);
    intent.putExtra("Month",mMonth);
    intent.putExtra("Year",mYear);

    startActivity(intent);

}
});

第二次Activity

int day;
int month;
int year;

EditText dateEditText;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);

    dateEditText = (EditText)findViewById(R.id.dateEditText);

    Intent intent = getIntent();

    if(intent != null){
         day = intent.getIntExtra("Day",0);
         month = intent.getIntExtra("Month",0);
         year = intent.getIntExtra("Year",0);

         Calendar calendar = Calendar.getInstance();
         calendar.set(2013,5,23);


         SimpleDateFormat format = new SimpleDateFormat("EEEE, MMMM d, yyyy 'at' h:mm a");
        dateEditText.setText(format.format(calendar.getTime()));

    }

}

编辑

// If you are using Calendar View

calendarView.setOnDateChangeListener(new OnDateChangeListener() {

@Override
public void onSelectedDayChange(CalendarView arg0, int year, int month,
    int date) {

     mDay = date;
     mYear = year;
     mMonth = month;
     // Now you can uses year, month date to sent 
}

});

 // Click Listener of Button in case of CalenderView

button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

    // Here you have to write the code to start new Activity
    // If your second activity name is "SecondActivity" then use below code

    Intent intent = new Intent(FirstActivity.this,SecondActivity.class);

    // Put the date values to the intent
    intent.putExtra("Day",mDay);
    intent.putExtra("Month",mMonth);
    intent.putExtra("Year",mYear);

    startActivity(intent);

}
});