短信发送倒计时按钮封装，退出再进入可继续倒计时，绝对时间倒计时

た入场券 2024-02-18 16:15 12阅读 0赞

先上图：

![SouthEast][]

主要类的代码：

/**
     * 用在获取短信验证码倒计时使用
     */
    public class SMSCodeUtil{
    	private TimerUtil tUtil;
    	private int time;//倒计时时间
    	private int past_time;//已经过去了的时间
    	private int leave_time;//剩余的时间
    	private String tag;
    	private TextView view;
    	/**
    	 * 剩余时间的key
    	 */
    	private final static String LEAVE_KEY="leave_time";
    	/**
    	 * 当前时间的key
    	 */
    	private final static String NOW_KEY="now_time";
    	
    	public SMSCodeUtil(TextView view,String tag,int time){
    		this.tag=tag;
    		this.past_time=Integer.parseInt((System.currentTimeMillis()-(Long)SharedPreferencesHelper.get(NOW_KEY+this.tag, 0L))/1000+"");
    		if(this.past_time<0){
    			this.past_time=0;
    		}
    		this.leave_time=(Integer)SharedPreferencesHelper.get(LEAVE_KEY+this.tag, 0)-past_time;
    		System.out.println("past_time="+past_time);
    		System.out.println("leave_time="+leave_time);
    		this.view=view;
    		this.time=time;
    	}
    	
    	private void setTimeStart(int start){
    		if(tUtil==null){
    			tUtil=new TimerUtil(start, 0, new TimerCallBack() {
    				@Override
    				public void timerCallBack(int now, boolean alive) {
    					System.out.println(now);
    					if(alive){
    						SMSCodeUtilHandler.sendEmptyMessage(now);
    					}else{
    						SMSCodeUtilHandler.sendEmptyMessage(0);
    					}
    
    					SharedPreferencesHelper.put(LEAVE_KEY+tag, now);
    					SharedPreferencesHelper.put(NOW_KEY+tag, System.currentTimeMillis());
    				}
    			});
    			tUtil.startTimer();
    		}else{
    			tUtil.stopTimer();
    			tUtil=null;
    			setTimeStart(start);
    		}
    	}
    	
    	@SuppressLint("HandlerLeak") 
    	private Handler SMSCodeUtilHandler=new Handler(){
    		@Override
    		public void handleMessage(Message msg) {
    			if(msg.what==0){
    				view.setText("重新发送");
    				view.setEnabled(true);
    			}else{
    				view.setText("重新发送"+"("+msg.what+"s)");
    			}
    		}
    	};
    	
    	public void restartTimer(){
    		if(leave_time>0){
    			if(leave_time>time){
    				leave_time=(Integer)SharedPreferencesHelper.get(LEAVE_KEY+this.tag, 0);
    			}
    			view.setEnabled(false);
    			setTimeStart(leave_time);
    		}
    	}
    	
    	public void startTimer(){
    		view.setEnabled(false);
    		setTimeStart(time);
    	}
    	
    	public void stopTimer(){
    		if(tUtil!=null)
    			tUtil.stopTimer();
    	}
    }

倒计时封装类：

public class TimerUtil {
    	private Timer timer=null;
    	/**
    	 * 递增还是递减的标识，0表示递减，1表示递增，默认递减
    	 */
    	private int order=0;
    	
    	private int start,end;
    	private TimerCallBack timerCallBack;
    	public TimerUtil(int start,int end,TimerCallBack timerCallBack) {
    		this.start=start;
    		this.end=end;
    		this.timerCallBack=timerCallBack;
    	}
    	
    	public TimerUtil(int start,int end,int order,TimerCallBack timerCallBack){
    		this.start=start;
    		this.end=end;
    		this.timerCallBack=timerCallBack;
    		this.order=order;
    	}
    	
    	public void startTimer(){
    		if(timer==null){
    			timer=new Timer();
    		}
    		timer.schedule(new TimerTask() {
    			@Override
    			public void run() {
    				if(order==0){
    					start--;
    					if(start<=end){
    						timerCallBack.timerCallBack(start,false);
    						stopTimer();
    					}else{
    						timerCallBack.timerCallBack(start,true);
    					}
    				}else if(order==1){
    					start++;
    					if(start>=end){
    						timerCallBack.timerCallBack(start,false);
    						stopTimer();
    					}else{
    						timerCallBack.timerCallBack(start,true);
    					}
    				}
    			}
    		}, 0,1000);
    	}
    	
    	public void stopTimer(){
    		if(timer!=null)
    			timer.cancel();
    	}
    	
    	public interface TimerCallBack{
    		public void timerCallBack(int now,boolean alive);
    	}
    }

调用代码：

SMSCodeUtil sUtil=new SMSCodeUtil(button, "register", REGET_SMS_CODE_TIME);
    sUtil.restartTimer();

代码下载： [http://download.csdn.net/download/u012800952/10050762][http_download.csdn.net_download_u012800952_10050762]

[SouthEast]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/fb91daac5a464c41b62ad7ef6a1c6551.png
[http_download.csdn.net_download_u012800952_10050762]: http://download.csdn.net/download/u012800952/10050762