Android 0 Basics Section 60th: Calendar view CalendarView and timer chronometer

The previous issue studied the AnalogClock, DigitalClock, and Textclock clock components, and this issue continues to learn the Calendar view CalendarView and timer chronometer.

First, CalendarView

The Calendar view (CalendarView) can be used to display and select dates, and users can select either a date or touch to scroll through the calendar. If you want to monitor the date change for that component, you can call CalendarView's Setondatechangelistener () method to add an event listener for this component's Click events.

You can specify common XML attributes and related methods as shown in the following table when using CalendarView.

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

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

<?XML version= "1.0" encoding= "Utf-8"?><Relativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent" >    <CalendarViewAndroid:id= "@+id/calendarview"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"Android:firstdayofweek= "3"Android:shownweekcount= "4"  /></Relativelayout>

Modify the code inside the mainactivity, load the above defined layout file, and then run the program, you can see the interface effect shown.

Second, chronometer

The chronometer is a simple timer that can be used by setbase () to give it a base time and count from that time, if not given the base time, the time when the start () method is called. The default is to display the current time in "Mm:ss" or "H:MM:SS" format, and of course you can customize the string to format the display.

One of the more important XML attributes of chronometer is as follows:

• Android:format: Set the time format such as: Hh:mm:ss.

Some common methods of chronometer are as follows:

• SetBase (long Base): Sets the countdown timer.

• SetFormat (String format): Sets the format of the display time.

• Start (): Start timing.

• Stop (): Stop timing.

When using chronometer, if you want to monitor the component's time, you can call Chronometer's Setonchronometerticklistener () method to add an event listener for this component's Click events.

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

Still using the Advancedviewsample module of the Widgetsample project, create the Chronnmeter_layout.xml file in the app/main/res/layout/directory, populated with the following code snippet:

<?XML version= "1.0" encoding= "Utf-8"?><LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"android:orientation= "vertical"android:gravity= "Center_horizontal">    <LinearLayoutAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"android:orientation= "Horizontal" >        <ButtonAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:onclick= "OnStart"Android:text= "Start timing" />        <ButtonAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:onclick= "OnStop"Android:text= "Stop Timing" />        <ButtonAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:onclick= "OnReset"Android:text= "Reset" />    </LinearLayout>    <chronometerAndroid:id= "@+id/chronometer"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"android:padding= "15DP"/></LinearLayout>

Next, complete the chronometer formatting in the activity and respond to the user's actions. Create a new Chronometeractivity.java file, load the new layout file above, initialize the DatePicker and get the user's choice, with the following code:

 Packagecom.jinyu.cqkxzsxy.android.advancedviewsample;ImportAndroid.os.Bundle;ImportAndroid.os.SystemClock;Importandroid.support.v7.app.AppCompatActivity;ImportAndroid.view.View;ImportAndroid.widget.Chronometer;/*** @ Creator Xin 鱻 * @ description Android 0 Basic primer to Master Series tutorials, welcome to the public number Shareexpert*/ Public classChronometeractivityextendsappcompatactivity {PrivateChronometer Mchronometer =NULL; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (r.layout.chronnmeter_layout); Mchronometer=(chronometer) Findviewbyid (r.id.chronometer); //SetFormat sets the formatted string for display. //The first "%s" in the replacement string is displayed for the current "Mm:ss" or "H:MM:SS" format. Mchronometer.setformat ("Timing:%s"); }    //Start Timing     Public voidOnStart (view view) {Mchronometer.start (); }    //Stop Timing     Public voidonStop (view view) {mchronometer.stop (); }    // Reset     Public voidonreset (view view) {//setbase Setting the base time//setting the parameter base to Systemclock.elapsedrealtime () indicates a re-timing starting from the current time. mchronometer.setbase (Systemclock.elapsedrealtime ()); }}

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

At this point, the components of the time and date classes are almost the same, how do you know?

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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Past period Summary share:

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: DatePicker and Timepicker selectors

Android 0 Basics Section 58th: Value selector numberpicker

Android 0 Basics Section 59th: Common Three clock clocks components

Android 0 Basics Section 60th: Calendar view CalendarView and timer chronometer