倒计时效果实现

倒计时效果实现

1、倒计时工具类的实现

public class CountDownTimerUtils extends CountDownTimer implements View.OnClickListener {
    private static final String TAG = CountDownTimerUtils.class.getSimpleName();
    //普通倒计时
    public static int NORMAL = 1;
    //首页登陆获取验证码
    public static int VERIFICODE = 2;
    //倒计时类型
    private static int type = NORMAL;
    private TextView mTextView;//用于显示倒计时数字，也可作为按钮使用
    private boolean isCounting=false;
    private IReacquireListener iReacquireListener;

    public CountDownTimerUtils(TextView textView, long millisInFuture, long countDownInterval, int setType) {
        super(millisInFuture, countDownInterval);//倒计时长，回调#onTick方法间隔时间
        type = setType;
        mTextView = textView;
        mTextView.setOnClickListener(this);
    }

    @Override
    public void onTick(long millisUntilFinished) {
        isCounting=true;
        mTextView.setClickable(false);
        int second= (int) (millisUntilFinished / 1000);
        Log.i(TAG, "onTick: second= "+second);
        mTextView.setText(String.format(mTextView.getResources().getString(R.string.unit_second), second + ""));
        //如果设置验证码倒计时
        if (type == VERIFICODE){
            mTextView.setBackgroundResource(R.drawable.btn_pressed_background);

            SpannableString spannableString = new SpannableString(mTextView.getText().toString());
            ForegroundColorSpan span = new ForegroundColorSpan(Color.parseColor("#F0752B"));
            spannableString.setSpan(span, 0, 2, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);//将倒计时的时间设置为红色
            mTextView.setText(spannableString);
        }

        Log.i(TAG, "onTick: isCounting= "+isCounting());
    }

    @Override
    public void onFinish() {
        isCounting = false;
        //如果设置验证码倒计时
        if (type == VERIFICODE){
            mTextView.setText(R.string.reacquire_verify_code);
            mTextView.setClickable(true);
            mTextView.setBackgroundResource(R.drawable.btn_background_selector);
        }else if (type == NORMAL){
            mTextView.setText("");
        }
        Log.i(TAG, "onFinish: isCounting= "+isCounting());
    }

    @Override
    public void onClick(View v) {
        iReacquireListener.reacquire();
    }

    //重新获取验证码回调接口
    public interface IReacquireListener{
        void reacquire();
    }

    public void setReacquireListener(IReacquireListener listener){
        iReacquireListener=listener;
    }

    public boolean isCounting(){
        return isCounting;
    }

}

2、在代码中的使用

CountDownTimerUtils countDownTimerUtils = new CountDownTimerUtils(tvCounter, 60000, 1000, VERIFICODE);
//开始倒计时
countDownTimerUtils.start();
//结束倒计时
countDownTimerUtils.cancel();