如何在android中为日期选择器设置最小和最大限制？

Question

我正在使用自定义日期和时间选择器的应用程序。 我创建了一个对话框，里面我分别显示日期和时间选择器现在我想为日期选择器设置最小和最大限制。 例如，不应该能够从今天选择前一个日期，并且不能超过一个月。 这是我的代码

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
      final DatePicker picker = new DatePicker(getActivity()); 
      try { 
       Field f[] = picker.getClass().getDeclaredFields(); 
       for (Field field : f) { 
        if (field.getName().equals("mYearPicker") || field.getName().equals("mYearSpinner")) { 
         field.setAccessible(true); 
         Object yearPicker = new Object(); 
         yearPicker = field.get(picker); 
         ((View) yearPicker).setVisibility(View.GONE); 
        } 
       } 
      } catch (Exception ex) { 
       ex.printStackTrace(); 
      } 
      picker.setCalendarViewShown(false); 
      picker.setMinDate(new Date().getTime()); 

      builder.setTitle("Please select date on which you would be leaving :") 
        .setView(picker) 
        .setPositiveButton("OK", 
          new DialogInterface.OnClickListener() { 
           public void onClick(DialogInterface dialog, int whichButton) { 
            SimpleDateFormat parseFormat = new SimpleDateFormat("EEE dd MMM"); 
            Date date1 = new Date(); 
            date1.setDate(picker.getDayOfMonth()); 
            date1.setMonth(picker.getMonth()); 
            final String s = parseFormat.format(date1); 
            Log.e("DATE", s); 
            SimpleDateFormat sdf=new SimpleDateFormat("MM-dd-yyyy"); 
            Date date2=new Date(); 
            date2.setDate(picker.getDayOfMonth()); 
            date2.setMonth(picker.getMonth()); 
            final String s2=sdf.format(date2); 


            //Time picker 
            AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
            final TimePicker picker = new TimePicker(getActivity()); 
            picker.setIs24HourView(true); 
            builder.setTitle("Please select time at which you would be leaving :") 
              .setView(picker) 
              .setPositiveButton("OK", 
                new DialogInterface.OnClickListener() { 
                 public void onClick(DialogInterface dialog, int whichButton) { 
                  int hour = picker.getCurrentHour(); 
                  int minute = picker.getCurrentMinute(); 
                  leaving.setTextSize(14); 

                  leaving.setText(s + " " + hour + ":" + minute); 
                  inTime=s2+" "+hour+":"+minute; 
                  Log.e("inTime ",inTime); 
                 } 
                }) 
              .setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
               public void onClick(DialogInterface dialog, int whichButton) { 
                leaving.setText(""); 
                inTime=""; 
                dialog.dismiss(); 
               } 
              }).create().show(); 
            //Time picker 
           } 
          } 
        ) 
        .setNegativeButton("Cancel", 
          new DialogInterface.OnClickListener() { 
           public void onClick(DialogInterface dialog, int whichButton) { 
            leaving.setText(""); 
            inTime=""; 
            dialog.dismiss(); 
           } 
          } 
        ) 
        .create().show(); 

请帮忙。谢谢

Answer 1

试试这个，从datepicker对话框中显示今天到下一个5年的日期。

public class MainActivity extends Activity { 

    TextView txtDatePicker; 
    Calendar cal,cal1; 
    long maxDate; 
    Date date; 

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

     cal = Calendar.getInstance(); 
     cal1 = Calendar.getInstance(); 

     txtDatePicker = (TextView) findViewById(R.id.txtDatePicker); 
     txtDatePicker.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 
       // TODO Auto-generated method stub 
       DatePickerDialog dialog = new DatePickerDialog(MainActivity.this, new OnDateSetListener() { 

        @Override 
        public void onDateSet(DatePicker arg0, int arg1, int arg2, int arg3) { 
         // TODO Auto-generated method stub 
         Toast.makeText(MainActivity.this, ""+arg1+"/"+(arg2+1)+"/"+arg3, Toast.LENGTH_SHORT).show(); 
        } 
      }, cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH)); 
      dialog.getDatePicker().setMinDate(System.currentTimeMillis()); 
      cal1.add(Calendar.YEAR, 5); 
      dialog.getDatePicker().setMaxDate(cal1.getTimeInMillis()); 
      dialog.show(); 
     } 
    }); 
    } 
} 

Answer 2

使用此代码。
我在我的应用程序中使用此代码。

// Global declaration 

    Calendar preferDate1 = new GregorianCalendar(); 
    Calendar preferDate2 = new GregorianCalendar(); 
    final Calendar c = Calendar.getInstance(); 
    year = c.get(Calendar.YEAR); 
    month = c.get(Calendar.MONTH); 
    day = c.get(Calendar.DAY_OF_MONTH); 
    private int year, month, day; 


    // here preferredDate1 and preferredDate2 are textview 
    preferredDate1.setOnClickListener(new OnClickListener() { 

       @SuppressLint("NewApi") 
       @Override 
       public void onClick(View v) { 
        DatePickerDialog dp = new DatePickerDialog(MainActivity.this, prefferedDate1Picker, preferDate1 
          .get(Calendar.YEAR), preferDate1.get(Calendar.MONTH), preferDate1.get(Calendar.DAY_OF_MONTH)); 
        dp.getDatePicker().setMinDate(c.getTimeInMillis()); 
        dp.show(); 
       } 
      }); 

    private final DatePickerDialog.OnDateSetListener prefferedDate1Picker = new DatePickerDialog.OnDateSetListener() { 

      @Override 
      public void onDateSet(DatePicker view, int selectedYear, int selectedMonth, int selectedDay) { 
       preferDate1 = new GregorianCalendar(selectedYear, selectedMonth, selectedDay); 
       preferredDate2.setText(""); 
       preferredDate1.setText((selectedDay < 10 ? "0" + String.valueOf(selectedDay) : String.valueOf(selectedDay)) + "/" 
         + (selectedMonth + 1 < 10 ? "0" + String.valueOf((selectedMonth + 1)) : String.valueOf((selectedMonth + 1))) 
         + "/" + selectedYear); 

      } 
     }; 


// This will set date based on preferredDate1 
// change here according to your need. If you want to add or remove one month then set based on data. In this I add one day in second data picker. 
preferredDate2.setOnClickListener(new OnClickListener() { 

      @SuppressLint("NewApi") 
      @Override 
      public void onClick(View v) { 
        DatePickerDialog dp2 = new DatePickerDialog(MainActivity.this, prefferedDate2Picker, preferDate2 
          .get(Calendar.YEAR), preferDate2.get(Calendar.MONTH), preferDate2.get(Calendar.DAY_OF_MONTH)); 

        long mili = preferDate1.getTimeInMillis() + 86400000L; 
        dp2.getDatePicker().setMinDate(mili); 
        dp2.show(); 

      } 
     }); 

     private final DatePickerDialog.OnDateSetListener prefferedDate2Picker = new DatePickerDialog.OnDateSetListener() { 

     @Override 
     public void onDateSet(DatePicker view, int selectedYear, int selectedMonth, int selectedDay) { 
      preferDate2 = new GregorianCalendar(selectedYear, selectedMonth, selectedDay+1); 
      preferredDate2.setText((selectedDay < 10 ? "0" + String.valueOf(selectedDay) : String.valueOf(selectedDay)) + "/" 
        + (selectedMonth + 1 < 10 ? "0" + String.valueOf((selectedMonth + 1)) : String.valueOf((selectedMonth + 1))) 
        + "/" + selectedYear); 

     } 
    };