关于CountDownButton倒计时控件的一些问题 about xui HOT 2 CLOSED

package com.wsy.companypassword.view;

import android.content.Context;
import android.os.Handler;
import android.support.v7.widget.AppCompatButton;
import android.util.AttributeSet;
/**
* @author cll
* @Time 2019/5/13 16:12
* @Description 倒计时button
*/
public class CountDownButton extends AppCompatButton {

    private long totalTime = 60 * 1000;// 默认60秒
    private String label = "s";
    private long time;
    private long step = 1000;
    private int interval = 1000;

    private Handler mHandler = new Handler() {
        public void handleMessage(android.os.Message msg) {
            time -= step;
            if (time <= 0) {
                reset();
            }
            else {
                refreshText();
                mHandler.sendEmptyMessageDelayed(0, step);
            }
        }
    };

    public CountDownButton(Context context) {
        this(context, null);
    }

    public CountDownButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    private void init(Context context, AttributeSet attrs) {
        setHintTextColor(getTextColors());
    }

    public void start() {
        this.setEnabled(false);
        this.time = totalTime;
        refreshText();
        mHandler.sendEmptyMessageDelayed(0, step);
    }

    private void refreshText() {
        long t = (time / interval);
        if (t > 0) {
            this.setText(t + label);
        }
    }

    public void reset() {
        setText("获取验证码");
        setEnabled(true);
    }

    /**
     * Set count down total time
     * <p>
     * <code> setTotalTime(30000);// 30s</code>
     * </p>
     *
     * @param totalTime
     *
     * @return CountDownButton self
     */
    public CountDownButton setTotalTime(long totalTime) {
        this.totalTime = totalTime;
        return this;
    }

    /**
     * Set count down step
     * <p>
     * <code> setStep(1000);// 1s</code>
     * </p>
     *
     * @param step count down step, micro seconds
     *
     * @return CountDownButton self
     */
    public CountDownButton setStep(long step) {
        if (step > 0) {
            this.step = step;
        }
        return this;
    }

    /**
     * Set count down text refresh interval.
     * <p>
     * <code> setInterval(1000);//1s, text display: (getRemainingTime() / interval) + label</code>
     * </p>
     *
     * @param interval count down text refresh interval, micro seconds
     *
     * @return CountDownButton self
     */
    public CountDownButton setInterval(int interval) {
        if (interval > 0) {
            this.interval = interval;
        }
        return this;
    }

    public long getRemainingTime() {
        return time;
    }

    public long getStep() {
        return step;
    }
}