Android Development: Verification Code Countdown function implementation

Objective

Now there are a lot of apps with verification Code Countdown button, the implementation of the way there are some of the following:

• 1. Using threads and handler to periodically refresh the countdown numbers, which can easily lead to memory leaks, so generally use weak references to control the number of refreshes.
• 2. Custom Countdown button
• 3, using Android provides Countdowntimer combined with TextView to achieve the countdown function

This article is basically the third way to achieve, easy to use

Realize

Here's the core code:

/** * Created by HFS on 2017/5/9. */PublicClassTimecountExtendsCountdowntimer {Private button button;Private String Ticktext;Private String Finishtext;/** *@param millisinfuture Countdown Total Duration *@param countdowninterval Countdown unit milliseconds. */PublicTimecount (Long Millisinfuture,Long Countdowninterval, Button button,string ticktext,string finishtext) {super (Millisinfuture, countdowninterval); this.button = button; this.ticktext=ticktext; this.finishtext=finishtext;}  @Override public void ontick (long millisuntilfinished) {Button.settext ( millisuntilfinished/1000 + ticktext); button.setenabled (false);}  @Override public void onfinish () {button.setenabled (true); Button.settext (FinishText);}}  

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I simply encapsulated myself as a custom button, and then I used a custom button directly

/** * Created by HFS on 2017/5/9. */PublicClassCountdownbuttonExtendsButton {Private Timecount Mtimecount;PrivateLong millisinfuture =60000;PrivateLong Countdowninterval =1000;Private String Mticktext ="s after re-acquisition";Private String Mfinishtext ="Re-acquisition";PublicCountdownbutton (Context context) {Super (context); Init (context); }PublicCountdownbutton (context context, AttributeSet Attrs) {Super (context, attrs); Init (context); }PublicCountdownbutton (context context, AttributeSet attrs,int defstyleattr) {Super (context, attrs, defstyleattr); Init (context); }PrivatevoidInit (Context context) {}/** * Set Countdown to how many milliseconds end * Default 60 seconds * *@param millisinfuture milliseconds */PublicvoidSetmillisinfuture (Long Millisinfuture) {This.millisinfuture = millisinfuture; }/** * Set Countdown interval * Default 1 seconds * *@param countdowninterval Countdown Interval */PublicvoidSetcountdowninterval (Long Countdowninterval) {This.countdowninterval = Countdowninterval; }/** * Set the countdown process button to display the content * @param text default s after retrieving */public void setonticktext (String text) {this.mticktext=text; } /** * Set countdown End button display content * @param finishtext Default regain */public void setonfinishtext (String Finishtext) {this.mfinishtext=finishtext;} public void startCount () { Mtimecount = new timecount (Millisinfuture, Countdowninterval, this, Mticktext, Mfinishtext); Mtimecount.start (); }} 

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Using the method is simple, just a few lines of code:

Publicclass mainactivity extends appcompatactivity {private Countdownbutton Mcountdownbutton;  @Override protected void Span class= "Hljs-title" >oncreate (Bundle savedinstancestate) {super.oncreate ( Savedinstancestate); Setcontentview (R.layout.activity_main); Mcountdownbutton = (Countdownbutton) Findviewbyid (R.id.btn_count_down); Mcountdownbutton.setonclicklistener (new View.onclicklistener () { @Override public void onclick (View v) {mcountdownbutton.startcount ();}); }}

Android Development: Verification Code Countdown function implementation