如何在 DatePickerDialog Android 中禁用今天日期之前的日期? [英] How to disable dates before today date in DatePickerDialog Android?

问题描述

我想在 DatePickerDialog 中禁用今天日期之前的日期.我是 android 新手，请建议我怎么做.这是我为 DatePickerDialog 编写的代码

I want to disable the dates before today date in the DatePickerDialog .I am new in android please suggest me how could i do this .Here is my code that i have written for DatePickerDialog

 final DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {

            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear,
                    int dayOfMonth) {
                // TODO Auto-generated method stub
                    myCalendar.set(Calendar.YEAR, year);
                    myCalendar.set(Calendar.MONTH, monthOfYear);
                    myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
                    updateLabel(val);
            }
        };
        depart.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    new DatePickerDialog(this, date, myCalendar
                            .get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),
                            myCalendar.get(Calendar.DAY_OF_MONTH)).show();
                    val=1;
                }
            });

        returnDate.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    new DatePickerDialog(this, date, myCalendar
                            .get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),
                            myCalendar.get(Calendar.DAY_OF_MONTH)).show();
                            val=2;
                }
            });


private void updateLabel(int val) {

        String myFormat = "dd/MM/yy"; //In which you need put here
        SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.US);
        Log.d("Date vlue ", "==="+sdf.format(myCalendar.getTime()));
        if(val==1)
            depart.setText(sdf.format(myCalendar.getTime()));
        else
            returnDate.setText(sdf.format(myCalendar.getTime()));

        }

请建议我必须做什么

推荐答案

看这个例子..！

import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;

public class MyAndroidAppActivity extends Activity {

    private TextView tvDisplayDate;

    private Button btnChangeDate;

    private int myear;
    private int mmonth;
    private int mday;

    static final int DATE_DIALOG_ID = 999;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        setCurrentDateOnView();
        addListenerOnButton();

    }

    // display current date
    public void setCurrentDateOnView() {

        tvDisplayDate = (TextView) findViewById(R.id.tvDate);       

        final Calendar c = Calendar.getInstance();
        myear = c.get(Calendar.YEAR);
        mmonth = c.get(Calendar.MONTH);
        mday = c.get(Calendar.DAY_OF_MONTH);

        // set current date into textview
        tvDisplayDate.setText(new StringBuilder()
                // Month is 0 based, just add 1
                .append(mmonth + 1).append("-").append(mday).append("-")
                .append(myear).append(" "));
    }

    public void addListenerOnButton() {

        btnChangeDate = (Button) findViewById(R.id.btnChangeDate);

        btnChangeDate.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                showDialog(DATE_DIALOG_ID);

            }

        });

    }

    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case DATE_DIALOG_ID:
            // set date picker as current date
            DatePickerDialog _date =   new DatePickerDialog(this, datePickerListener, myear,mmonth,
                    mday){
                @Override
                public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth)
                {   
                    if (year < myear)
                        view.updateDate(myear, mmonth, mday);

                    if (monthOfYear < mmonth && year == myear)
                        view.updateDate(myear, mmonth, mday);

                    if (dayOfMonth < mday && year == myear && monthOfYear == mmonth)
                        view.updateDate(myear, mmonth, mday);

                }
            };
            return _date;
        }
        return null;
    }

    private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {

        // when dialog box is closed, below method will be called.
        public void onDateSet(DatePicker view, int selectedYear,
                int selectedMonth, int selectedDay) {
            myear = selectedYear;
            mmonth = selectedMonth;
            mday = selectedDay;

            // set selected date into textview
            tvDisplayDate.setText(new StringBuilder().append(mmonth + 1)
                    .append("-").append(mday).append("-").append(myear)
                    .append(" "));    

        }
    };

}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btnChangeDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Change Date" />

    <TextView
        android:id="@+id/lblDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Current Date (M-D-YYYY): "
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/tvDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>

这篇关于如何在 DatePickerDialog Android 中禁用今天日期之前的日期?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！