注冊驗證碼倒計時（含源碼）

賬号注冊是一個APP的首要任務，賬号注冊一般都要用到短信驗證，而短信驗證一般都需要一個60S倒計時，下面為大家分享一個倒計時服務！
首先自定義一個CountDownTimer，控制時長；
直接上代碼：
public class RegisterCodeTimer extends CountDownTimer {

    private static Handler mHandler;
    public static final int IN_RUNNING = 1001;
    public static int END_RUNNING = 1002;
    public long mMillisUntilFinished = 0;

    /**
     * @param millisInFuture    // 倒計時的時長
     * @param countDownInterval // 間隔時間
     * @param handler           // 通知進度的Handler
     */
    public RegisterCodeTimer(long millisInFuture, long countDownInterval,
                             Handler handler) {
        super(millisInFuture, countDownInterval);
        mMillisUntilFinished = millisInFuture;
        mHandler = handler;
    }

    // 結束
    @Override
    public void onFinish() {
        mMillisUntilFinished = -1;
        // TODO Auto-generated method stub
        if (mHandler != null)
            mHandler.obtainMessage(END_RUNNING, "重新發送").sendToTarget();
    }

    @Override
    public void onTick(long millisUntilFinished) {
        // TODO Auto-generated method stub
        mMillisUntilFinished = millisUntilFinished;
        if (mHandler != null)
            mHandler.obtainMessage(IN_RUNNING,
                    (millisUntilFinished / 1000) + "s 後重新發送").sendToTarget();
    }

}
接下來倒計時即便界面關閉了，倒計時依然要進行，是以需要通過Service來實作，自定義RegisterCodeTimerService，繼承Service；
代碼如下:
public class RegisterCodeTimerService extends Service {

    private static int DEFAULT_TIME = 30000;
    private static Intent mIntent;

    private static Handler mHandler;
    private static RegisterCodeTimer mCodeTimer;

    private static View mSendCodeView;

    /**
     * 擷取用來倒計時的具體執行個體
     * 就是一個線程
     *
     * @return
     */
    public static RegisterCodeTimer getRegisterCodeTimer() {
        return mCodeTimer;
    }

    public static void startService(Activity activity, int beginBackgroundRes) {
        getIntent(activity);
        mSendCodeView.setEnabled(false);
        mSendCodeView.setBackgroundResource(beginBackgroundRes);
        activity.startService(mIntent);
    }

    /**
     * 擷取這個服務中的Intent
     *
     * @param context
     * @return
     */
    private static Intent getIntent(Context context) {
        if (mIntent == null) {
            mIntent = new Intent(context, RegisterCodeTimerService.class);
        }
        return mIntent;
    }

    /**
     * 設定停止倒計時
     */
    public static void onActivityFinish() {
        if (mCodeTimer != null) {
            mCodeTimer.cancel();
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub

        return null;
    }

    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
    }

    @SuppressWarnings("deprecation")
    @Override
    public void onStart(Intent intent, int startId) {
        // TODO Auto-generated method stub
        super.onStart(intent, startId);
        mCodeTimer = new RegisterCodeTimer(DEFAULT_TIME, 1000, mHandler);
        mCodeTimer.start();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO Auto-generated method stub
        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub
        mCodeTimer.onFinish();
        super.onDestroy();
    }


    /**
     * 設定要進行倒計時的控件
     *
     * @param view                 具體倒計時的控件
     * @param endTimeBackgroundRes 結束倒計時後的背景資源
     */
    public static void setCountDownView(View view, final int endTimeBackgroundRes) {

        if (view instanceof TextView) {

            final TextView textView = (TextView) view;
            mSendCodeView = textView;
            /**
             * 倒計時Handler
             */
            mHandler = new Handler() {
                public void handleMessage(Message msg) {
                    if (msg.what == RegisterCodeTimer.IN_RUNNING) {// 正在倒計時
                        textView.setText(msg.obj.toString());
                        textView.setBackgroundResource(R.drawable.bg_blue_fillet);
                    } else if (msg.what == RegisterCodeTimer.END_RUNNING) {// 完成倒計時
                        textView.setEnabled(true);
                        textView.setText(msg.obj.toString());
                        textView.setBackgroundResource(endTimeBackgroundRes);
                    }
                }
            };
        }

    }

    /**
     * 設定要倒計時的時間
     *
     * @param time
     */
    public static void setCountDownTime(int time) {
        DEFAULT_TIME = time;
    }

}

然後就是使用了：
第一步：去清單檔案注冊Service；
<!-- 倒計時的Service -->
 <service
        android:name=".service.RegisterCodeTimerService"
        android:enabled="true" />
   第二步：設定要倒計時的控件，控件的背景色，倒計時時長;
   RegisterCodeTimerService.setCountDownTime(60000);
        RegisterCodeTimerService.setCountDownView(mDataBinding.registerBtnCode, R.drawable.bg_blue_fillet);
  第三步：在需要開啟倒計時的地方，調用RegisterCodeTimerService中的startService方法，并設定倒計時開始控件的背景色；
  RegisterCodeTimerService.startService(RegisterActivity.this, R.drawable.bg_blue_fillet);
  第四步：當頁面消失的時候需要調用onActivityFinish();
    @Override
    protected void onDestroy() {
        super.onDestroy();
        RegisterCodeTimerService.onActivityFinish();
    }
    PS：一定不能忘了注冊Service哦；
    [源碼下載下傳位址](https://github.com/lvqingfeng/Lightning/blob/master/app/src/main/java/com/lightningfast/service/RegisterCodeTimerService.java "源碼")