验证码定时器

CountDownTimerUtils

public class CountDownTimerUtils extends CountDownTimer {

    private TextView mTextView;

    public CountDownTimerUtils(TextView textView, long millisInFuture, long countDownInterval) {
        super(millisInFuture, countDownInterval);
        this.mTextView = textView;
    }

    @Override
    public void onTick(long millisUntilFinished) {
        mTextView.setClickable(false);
        mTextView.setText(millisUntilFinished / 1000 + "秒");
        mTextView.setBackgroundColor(Color.parseColor("#cccccc"));

        SpannableString spannableString = new SpannableString(mTextView.getText().toString());
        ForegroundColorSpan span = new ForegroundColorSpan(Color.RED);
        spannableString.setSpan(span, 0, 2, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        mTextView.setText(spannableString);
    }

    @Override
    public void onFinish() {
        mTextView.setText("获取验证码");
        mTextView.setClickable(true);
        mTextView.setBackgroundColor(Color.parseColor("#FF4081"));
    }

使用

CountDownTimerUtils mCountDownTimerUtils = new CountDownTimerUtils(tvCode, 60000, 1000);
                mCountDownTimerUtils.start();