android - Android：点击了哪个日期选择器

Question

我在同一个活动中有两个日期选择器

当用户单击设备上的返回按钮时，系统假设知道用户更改了哪个日期选择器日期

并注意：

两个日期选择器已连接，当用户更改一个选择器日期时，另一个选择器日期也会以特定方式更改，具体取决于第一个选择器

有什么办法吗？

Answer 1

我没有对此进行测试，但我认为这应该可行：

private DatePicker datePicker1;
private DatePicker datePicker2;
//...
OnDateChangedListener listener = new OnDateChangedListener() {
    @Override
    public void onDateChanged(DatePicker view, int year, int monthOfYear,int dayOfMonth) {

          if (datePicker1.equals(view)) {
               // Date of datePicker1 is changed
               // ...
          }
          else if (datePicker2.equals(view)) {
               // Date of datePicker2 is changed
               // ...
          }
}

datePicker1.init(2012, 11, 27, listener);
datePicker2.init(2012, 11, 27, listener);

Answer 2

您需要做的是获取对 EditText 和 DatePicker 的引用：

EditText editText = (EditText) findViewById( R.id.dateSelectionEditText );
DatePicker datePicker = (DatePicker) findViewById( R.id.datePicker );
Then you need to create an OnDateChangedListener:

private class MyOnDateChangedListener implements OnDateChangedListener {
  @Override
  public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
     editText.setText( "" + dayOfMonth + "-" + (monthOfYear + 1) + "-" + year );
  }
};

剩下要做的就是初始化 DatePicker：

datePicker.init( year, monthOfYear, dayOfMonth, new MyOnDateChangedListener() ).

http://developer.android.com/guide/topics/ui/controls/pickers.html

在您的活动中全局初始化这些变量，

private EditText zopenDate;
        Button calendar;

        private int mYear;
        private int mMonth;
        private int mDay;
        private DatePickerDialog.OnDateSetListener mDateSetListener;

在您的实例内部

calendar=(Button)findViewById(R.id.datePicker);
zopenDate=(EditText)findViewById(R.id.dateSelectionEditText);
inside your instance use this listeners,

mDateSetListener =
            new DatePickerDialog.OnDateSetListener() {

                public void onDateSet(DatePicker view, int year, 
                                      int monthOfYear, int dayOfMonth) {
                    mYear = year;
                    mMonth = monthOfYear;
                    mDay = dayOfMonth;
                    updateDisplay();
                }
            };



calendar.setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) {
                    showDialog(DATE_DIALOG_ID);
                }
            });




final Calendar c = Calendar.getInstance();
            mYear = c.get(Calendar.YEAR);
            mMonth = c.get(Calendar.MONTH);
            mDay = c.get(Calendar.DAY_OF_MONTH);

            // display the current date (this method is below)
            updateDisplay();
the funtion updatedisplay() outside createInstance(),

private void updateDisplay() {
        zopenDate.setText(
            new StringBuilder()
                    // Month is 0 based so add 1
                    .append(mMonth + 1).append("-")
                    .append(mDay).append("-")
                    .append(mYear).append(" "));
    }