Text message registration countdown Function

Text message registration countdown Function

Android has the registration function. Currently, many registered users use mobile phone numbers. Because mobile phone numbers are used for registration, the app can push some data to the client based on the registered mobile phone number, in order to prevent some users from frequently obtaining verification codes, you can use time to do some operations to prevent this situation. For example, the user can only click in one minute; otherwise, the user is not allowed to click, the button cannot be clicked within one minute, and the user can click it after one minute. When the user enters the mobile phone number and obtains the verification code, there is a countdown function. Let's talk about this implementation today, in fact, this kind of convenient operation has been provided for us in android. OS. countDownTimer package,

Instance code:

Public class MainActivity extends Activity {private EditText et_phone; private Button btn_coder; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); et_phone = (EditText) findViewById (R. id. et_phone); btn_coder = (Button) findViewById (R. id. btn_coder); et_phone.addTextChangedListener (new TextWatcher () {@ Overridepublic void onTextChanged (CharSequence s, int start, int before, int count) {if (s. toString (). length () = 11) {// when the phone number entered by the user is not 11 characters, you cannot click the "btn_coder.setClickable (true)" button to obtain the verification code );} else {btn_coder.setClickable (false) ;}@ Overridepublic void beforeTextChanged (CharSequence s, int start, int count, int after) {}@ Overridepublic void afterTextChanged (Editable s) {}}); btn_coder.setOnClickListener (new OnClickListener () {public void onClick (View v) {startTimer () ;}});} protected void startTimer () {CountDownTimer countDownTimer = new CountDownTimer (60*1000) {@ Overridepublic void onTick (long millisUntilFinished) {interval (millisUntilFinished/+ ""); reset (false ); // prevent repeated Log clicks. e ("CountDownTimer", "millisUntilFinished =" + millisUntilFinished/1000);} @ Overridepublic void onFinish () {// you can perform some operations here, if no verification code is obtained, request the server btn_coder.setClickable (true); // prevent repeated btn_coder.setText ("Get Verification Code"); }}; countDownTimer. start ();}}

You can also use Handler

Public class MainActivity extends Activity {private EditText et_phone; private Button btn_coder; private int mCount = 60; private Handler mHandler = new Handler (); Runnable runnable = new Runnable () {@ Override public void run () {mCount --; if (mCount> 0) {btn_coder.setText ("" + mCount); mHandler. postDelayed (this, 1000);} else {btn_coder.setText ("Get Verification Code"); mHandler. removeCallbacks (this) ;}}; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); et_phone = (EditText) findViewById (R. id. et_phone); btn_coder = (Button) findViewById (R. id. btn_coder); et_phone.addTextChangedListener (new TextWatcher () {@ Overridepublic void onTextChanged (CharSequence s, int start, int before, int count) {if (s. toString (). length () = 11) {// when the phone number entered by the user is not 11 characters, you cannot click the "btn_coder.setClickable (true)" button to obtain the verification code );} else {btn_coder.setClickable (false) ;}@ Overridepublic void beforeTextChanged (CharSequence s, int start, int count, int after) {}@ Overridepublic void afterTextChanged (Editable s) {}}); btn_coder.setOnClickListener (new OnClickListener () {public void onClick (View v) {handlerDown () ;}});} protected void handlerDown () {mCount = 60; mHandler. postDelayed (runnable, 1000); // an API that calls a text message in one second ,}}

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