Android 0 Basics Section 57th: Date picker DatePicker and time picker Timepicker

In the actual development, often meet some time selector, date selector, digital selector and other requirements, then from the beginning of this period to learn about Android Common selectors, today is learning DatePicker and timepicker.

First, DatePicker

DatePicker is a relatively simple component, derived from Framelayout, for the user to select a date. It provides some methods based on framelayout to get the date selected by the current user, and if the program needs to get the date selected by the user, it can be implemented by listening for DatePicker add Ondatechangedlistener.

Common XML attributes that use DatePicker are as follows:

• Android:calendarviewshown: Sets the date to select whether to display the CalendarView component.

• Android:endyear: Sets the date selector to allow selection of the last year.

• Android:maxdate: Sets the maximum date for the date selector. Specifies the maximum date in mm/dd/yyyy format.

• Android:mindate: Sets the minimum date for the date selector. Specifies the minimum date in mm/dd/yyyy format.

• Android:spinnersshown: Sets whether the date selector displays the spinner Date selection component.

• Android:startyear: Sets the date selector to allow the first year of selection.

  
  

Next, a simple example program is used to learn the use of DatePicker.

Continue to use the Advancedviewsample module of the Widgetsample project to create a datepicker_layout.xml file in the app/main/res/layout/directory populated with the following code snippet:

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

    <DatePicker
        android:id="@+id/datePicker"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:startYear="2015"
        android:endYear="2020"
        android:calendarViewShown="true"
        android:spinnersShown="true" />
</RelativeLayout>

Create a new Datepickeractivity.java file, load the new layout file above, initialize the DatePicker and get the user's choice, with the following code:

package com.jinyu.cqkxzsxy.android.advancedviewsample;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.DatePicker;
import android.widget.Toast;

import java.util.Calendar;

/ **
 * @Creator 鑫 鱻
 * @Description Android zero-based entry to the proficient tutorial series, welcome to follow the public account ShareExpert
 * /
public class DatePickerActivity extends AppCompatActivity {
    private DatePicker mDatePicker = null; // date picker
    private Calendar mCalendar = null; // calendar
    private int mYear; // year
    private int mMonth; // month
    private int mDay; // day

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

        // Get the calendar object
        mCalendar = Calendar.getInstance ();
        // Get the current year, month, and day information
        mYear = mCalendar.get (Calendar.YEAR);
        mMonth = mCalendar.get (Calendar.MONTH);
        mDay = mCalendar.get (Calendar.DAY_OF_MONTH);

        // Get DatePicker component
        mDatePicker = (DatePicker) findViewById (R.id.datePicker);
        // DatePicker initialization
        mDatePicker.init (mYear, mMonth, mDay, new DatePicker.OnDateChangedListener () {
            @Override
            public void onDateChanged (DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                Toast.makeText (DatePickerActivity.this,
                        year + "year" + (monthOfYear + 1) + "month" + dayOfMonth + "day",
                        Toast.LENGTH_SHORT) .show ();
            }
        });
    }
} 

The above program code is the code that DatePicker binds the event listener, and the listener is triggered when the user chooses the date through this component.

Running the program, you can see the interface effect shown.

Second, Timepicker

Timepicker and DatePicker are very similar, mainly for the user to choose the time. Also on the basis of Framelayout provides a number of methods to obtain the current user selected time, if the program needs to get the user's choice of time can be achieved by adding ontimechangedlistener for Timepicker to listen.

Next, a simple example program is used to learn the use of Timepicker.

Continue to use the Advancedviewsample module of the Widgetsample project to create a timepicker_layout.xml file in the app/main/res/layout/directory populated with the following code snippet:

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

    <TimePicker
        android:id="@+id/timePicker"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal" />
</RelativeLayout>

Create a new Timepickeractivity.java file, load the new layout file above, initialize the Timepicker and get the user's choice, with the following code:

package com.jinyu.cqkxzsxy.android.advancedviewsample;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TimePicker;
import android.widget.Toast;

import java.util.Calendar;

/ **
 * @Creator 鑫 鱻
 * @Description Android zero-based entry to the proficient tutorial series, welcome to follow the public account ShareExpert
 * /
public class TimePickerActivity extends AppCompatActivity {
    private TimePicker mTimePicker = null; // time picker
    private Calendar mCalendar = null; // calendar
    private int mHour; // hour
    private int mMinute; // min

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

        // Get the calendar object
        mCalendar = Calendar.getInstance ();
        // Get the corresponding hour and minute information
        mHour = mCalendar.get (Calendar.HOUR_OF_DAY);
        mMinute = mCalendar.get (Calendar.MINUTE);

        // Get TimePicker component
        mTimePicker = (TimePicker) findViewById (R.id.timePicker);
        // Specify a listener for TimePicker
        mTimePicker.setOnTimeChangedListener (new TimePicker.OnTimeChangedListener () {
            @Override
            public void onTimeChanged (TimePicker view, int hourOfDay, int minute) {
                Toast.makeText (TimePickerActivity.this, hourOfDay + ":" + minute,
                        Toast.LENGTH_SHORT) .show ();
            }
        });
    }
} 

The above program code is the code that Timepicker binds the event listener, and the listener is triggered when the user chooses the time through this component.

Running the program, you can see the interface effect shown.

At this point, the simple use of DatePicker and Timepicker first, more multi-functional advice to explore more practice.

Come here today, if you have any questions welcome message to discuss together, also welcome to join the Android 0 Basic introductory Technical discussion group, grow together!

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Android 0 Basics Introduction 1th: Android's past life

Android 0 Basics Section 2nd: Android system Architecture and application components those things

Android 0 Basics Section 3rd: Bring you up to talk about Android development environment

Android 0 Basics 4th: Installing and configuring the JDK correctly Ko fu the first trick

Android 0 Basics 5th: Use ADT bundles to easily meet the goddess

Android 0 Basics 6th: Configuration Optimization SDK Manager, official dating goddess

Android 0 Basics 7th: Take care of Android simulator and start the Sweet journey

Android 0 Basics 8th: HelloWorld, the starting point for my first trip

Android 0 Basics 9th: Android app, no code can be developed

Android 0 Basics Section 10th: Development IDE Big upgrade, finally ushered in Android Studio

Android 0 Basics Introductory Section 11th: Simple steps to take you to fly, run Android Studio project

Android 0 Basics 12th: Get familiar with the Android studio interface and start selling

Android 0 Basics 13th: Android Studio Configuration optimization to create a development tool

Android 0 Basics 14th: Using high-speed genymotion, stepping into the rocket era

Android 0 Basics Section 15th: Mastering the Android Studio project structure, sailing

Android 0 Basics Section 16th: Android User Interface Development overview

Android 0 Basics Section 17th: text box TextView

Android 0 Basics Section 18th: Input box EditText

Android 0 Basics Get started section 19th: Buttons button

Android 0 Basics 20th: check box checkbox and radio button radiobutton

Android 0 Basics Section 21st: Switch Components ToggleButton and switch

Android 0 Basics Section 22nd: Image View ImageView

Android 0 Basics Section 23rd: Image button ImageButton and zoom button Zoombutton

Android 0 Basics Section 24th: Customize view simple to use to create your own controls

Android 0 Basics Section 25th: Simple and most commonly used linearlayout linear layouts

Android 0 Basics Section 26th: Two alignments, layout_gravity and gravity differ greatly

Android 0 Basics section 27th: Using padding and margin correctly

Android 0 Basics Section 28th: Easy to master relativelayout relative layout

Android 0 Basics 29th: Use tablelayout table layouts

Android 0 Basics 30th: Two minutes master Framelayout frame layout

Android 0 Basics Section 31st: absolutelayout absolute Layout with less

Android 0 Basics Section 32nd: New GridLayout Grid layout

Android 0 Basics section 33rd: Android Event Handling overview

Android 0 Basics Section 34th: Listening-based event handling in Android

Android 0 Basics Section 35th: Callback-based event handling in Android

Android 0 Basics Section 36th: Handling of Android system events

Android 0 Basics 37th: First Knowledge ListView

Android 0 Basics 38th: First Knowledge Adapter

Android 0 Basics section 39th: listactivity and custom list items

Android 0 Basics Section 40th: Customizing Arrayadapter

Android 0 Basics Section 41st: Using Simpleadapter

Android 0 Basics Section 42nd: Customizing Baseadapter

Android 0 Basics section 43rd: ListView Optimization and List End-to-end use

Android 0 Basics Section 44th: ListView Data Dynamic Update

Android 0 Basic Getting Started section 45th: Grid view GridView

Android 0 Basics section 46th: List Options Box spinner

Android 0 Basic Getting Started section 47th: AutoComplete text Box Autocompletetextview

Android 0 Basics Section 48th: Collapsible list Expandablelistview

Android 0 Basics section 49th: Adapterviewflipper picture Carousel

Android 0 Basics Section 50th: StackView card Stacking

Android 0 Basics Section 51st: progress bar ProgressBar

Android 0 Basics section 52nd: Customizing ProgressBar Cool progress bar

Android 0 Basics 53rd: Drag bar Seekbar and star rating bar Ratingbar

Android 0 Basics section 54th: View switch Components Viewswitcher

Android 0 Basics Section 55th: Imageswitcher and Textswitcher

Android 0 Basics Section 56th: Flip View Viewflipper

Android 0 Basics Section 57th: Date picker DatePicker and time picker Timepicker