Остановить пользователя от выбора прошлой даты и времени в datepickerdialog и timepickerdialog android

Question

Я разрабатываю свое первое приложение для напоминания о местоположении, где я добавляю задания с местоположениями и датой и временем, для которых, когда я достигаю, я должен быть уведомлен. В операции добавления задачи у меня есть имя задачи, местоположение, кнопки для даты и времени (при нажатии кнопки DatePickerDialog и TimePickerDialog) и кнопки AddTask. Я хочу, чтобы пользователь не выбирал прошлую дату и время из диалога. Как я могу это сделать... ?

public class AddTasks extends Activity { 

TaskForm activityForm = new TaskForm(); 

private Button pPickDate; 
private int pYear; 
private int pMonth; 
private int pDay; 
public String date; 
public String Loc; 
public double lat; 
public double lon; 

private Button pPickTime; 
private int mHour; 
private int mMinute; 
public String time; 

private TimePickerDialog timePickerDialog; 
private DatePickerDialog datePickerDialog; 

Date selectedDate; 


/** This integer will uniquely define the dialog to be used for displaying date picker.*/ 
static final int DATE_DIALOG_ID = 0; 
static final int TIME_DIALOG_ID = 1; 

/** Callback received when the user "picks" a date in the dialog */ 
private DatePickerDialog.OnDateSetListener pDateSetListener = 
     new DatePickerDialog.OnDateSetListener() { 

      public void onDateSet(DatePicker view, int year, 
            int monthOfYear, int dayOfMonth) { 
       pYear = year; 
       pMonth = monthOfYear; 
       pDay = dayOfMonth; 
       updateDate(); 
       displayDateToast(); 
      } 
     }; 

private TimePickerDialog.OnTimeSetListener mTimeListener = 
     new TimePickerDialog.OnTimeSetListener() { 
      public void onTimeSet(TimePicker view, int hour, int minute) { 
       mHour = hour; 
       mMinute = minute; 
       updateTime(); 
       displayTimeToast(); 
      } 
     }; 

/** Updates the date in the TextView */ 
private void updateDate() { 
    /** pDisplayDate.setText(*/ date = 
      new StringBuilder() 
        // Month is 0 based so add 1 
        .append(pDay).append("/") 
        .append(pMonth + 1).append("/") 
        .append(pYear).append(" ").toString(); 
    // date = pDisplayDate.getText().toString(); 

} 

private void updateTime() { 
    /** pDisplayTime.setText(*/ time = 
      new StringBuilder() 
        .append(mHour).append(":") 
        .append(mMinute).append("").toString(); 
} 

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

    /** Capture our View elements */ 
    //pDisplayDate = (TextView) findViewById(R.id.displayDate); 
    pPickDate = (Button) findViewById(R.id.pickDate); 

    /** Listener for click event of the button */ 
    pPickDate.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      showDialog(DATE_DIALOG_ID); 
     } 
    }); 

    /** Capture our View elements */ 
    //pDisplayTime = (TextView) findViewById(R.id.displayTime); 
    pPickTime = (Button) findViewById(R.id.pickTime); 


    /** Listener for click event of the button */ 
    pPickTime.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      showDialog(TIME_DIALOG_ID); 
     } 
    }); 

    /** Get the current date and time */ 
    final Calendar cal = Calendar.getInstance(); 
    pYear = cal.get(Calendar.YEAR); 
    pMonth = cal.get(Calendar.MONTH); 
    pDay = cal.get(Calendar.DAY_OF_MONTH); 

    mHour = cal.get(Calendar.HOUR_OF_DAY); 
    mMinute = cal.get(Calendar.MINUTE); 
} 

/** Create a new dialog for date and time picker */ 
@Override 
protected Dialog onCreateDialog(int id) { 
    switch (id) { 
     case DATE_DIALOG_ID: 
      datePickerDialog = new DatePickerDialog(this, 
        pDateSetListener, 
        pYear, pMonth, pDay); 
      return datePickerDialog; 

     case TIME_DIALOG_ID: 
      timePickerDialog = new TimePickerDialog(this, 
        mTimeListener, 
        mHour,mMinute,true) ; 
      return timePickerDialog; 
    } 
    return null; 
} 

public void add_task(View view) { 

    if(activityForm.getTaskNameInput().getText() != null && 
      activityForm.getTaskLocInput() != null && activityForm.getTaskDateInput() != null && 
      activityForm.getTaskTimeInput() != null) { 

     Task task = new Task(); 
     task.setTaskNameString(activityForm.getTaskNameInput().getText() 
       .toString()); 
     task.setTaskLocString(activityForm.getTaskLocInput()); 
     task.setTaskLat(activityForm.getTaskLat()); 
     task.setTaskLon(activityForm.getTaskLon()); 
     task.setDateString(activityForm.getTaskDateInput()); 
     task.setTimeString(activityForm.getTaskTimeInput()); 

     persistTask(task); 

     Toast.makeText(getApplicationContext(), "SAVED=" + task.hashCode(), 
       Toast.LENGTH_LONG).show(); 

     activityForm.getTaskNameInput().setText(" "); 

     Calendar c = Calendar.getInstance(); 
     if (timePickerDialog != null) { 
      timePickerDialog.updateTime(c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE)); 
     } 

     if (datePickerDialog != null) { 
      datePickerDialog.updateDate(c.get(Calendar.YEAR), c.get(Calendar.MONTH), 
        c.get(Calendar.DAY_OF_MONTH)); 
     } 
    } 

    else { 
     AlertDialog.Builder dialog = new AlertDialog.Builder(this); 
     dialog.setTitle("Attention"); 
     dialog.setMessage("Please ensure you are setting all the values"); 
     dialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog, int id) { 

      } 
     }); 
     dialog.show(); 
    } 
} 

class TaskForm { 
private EditText taskNameInput; 
private String taskLocInput; 
private Double taskLat; 
private Double taskLon; 
private String taskTimeInput; 
private String taskDateInput; 

/** 
* @return the taskNameInput 
*/ 
public EditText getTaskNameInput() { 
    return taskNameInput; 
} 

/** 
* @param taskNameInput 
*   the taskNameInput to set 
*/ 
public void setTaskNameInput(EditText taskNameInput) { 
    this.taskNameInput = taskNameInput; 
} 

/** 
* @return the taskLocInput 
*/ 
public String getTaskLocInput() { 
    return taskLocInput; 
} 
/** 
* @param taskLocInput 
*   the taskLocInput to set 
*/ 
public void setTaskLocInput(String taskLocInput) { 
    this.taskLocInput = taskLocInput; 
} 

public Double getTaskLat(){ 
    return taskLat; 
} 
public void setTaskLat(Double taskLat){ 
    this.taskLat = taskLat; 
} 
public Double getTaskLon(){ 
    return taskLon; 
} 
public void setTaskLon(Double taskLon){ 
    this.taskLon = taskLon; 
} 

/** 
* @return the taskDateInput 
*/ 

public String getTaskDateInput(){ 
    return taskDateInput; 
} 

/** 
* @param taskDateInput 
*   the taskDateInput to set 
*/ 

public void setTaskDateInput(String taskDateInput){ 
    this.taskDateInput = taskDateInput; 
} 

/** 
* @return the taskTimeInput 
*/ 
public String getTaskTimeInput() { 
    return taskTimeInput; 
} 

/** 
* @param taskTimeInput 
*   the taskTimeInput to set 
*/ 
public void setTaskTimeInput(String taskTimeInput) { 
    this.taskTimeInput = taskTimeInput; 
} 

}

Answer 1

вы можете установить MinDate в календаре по текущей дате.