Question

由于某种原因，计时器开始正常，但从未停止。

我创建了一个新类：

package com.test.webservertest;

import android.os.Handler;
import android.os.SystemClock;
import android.widget.TextView;

/**
 * Created by me on 11/18/2015.
 */

public class Timers
{
    private long startTime = 0L;
    private Handler customHandler = new Handler();
    private long timeInMilliseconds = 0L;
    private long timeSwapBuff = 0L;
    private long updatedTime = 0L;
    private String recordtimer;
    private Runnable updateTimerThread;

    public void StartTimer(TextView timerValue) {
        startTime = SystemClock.uptimeMillis();
        customHandler.postDelayed(updateTimerThread = new UpdateTimerThread(timerValue), 0);
    }

    public void StopTimer(TextView timerValue) {
        timeSwapBuff += timeInMilliseconds;
        customHandler.removeCallbacks(updateTimerThread = new UpdateTimerThread(timerValue));
    }


    public class UpdateTimerThread implements Runnable {
        protected TextView timerValue;

        public UpdateTimerThread(TextView timerValue) {
            this.timerValue= timerValue;
        }

        public void run() {

            timeInMilliseconds = SystemClock.uptimeMillis() - startTime;

            updatedTime = timeSwapBuff + timeInMilliseconds;

            int secs = (int) (timeInMilliseconds / 1000);
            int mins = secs / 60;
            secs = secs % 60;
            int hours = mins / 60;
            mins = mins % 60;
            recordtimer = "Recording Time: " + String.format("%02d", hours) + ":" + String.format("%02d", mins) + ":" + String.format("%02d", secs);
            timerValue.post(new Runnable()
            {
                public void run()
                {
                    timerValue.setText(recordtimer);
                }
            });
            //set yout textview to the String timer here
            customHandler.postDelayed(this, 1000);
        }
    }


}

然后在MainActivity中我做了：

if (is_start == true)
                                {
                                    timers.StartTimer(timerValueRecord);  
                                    response = Get(iptouse + "start");
                                    is_start = false;
                                } else
                                {
                                    timers.StopTimer(timerValueRecord);
                                    textforthespeacch = "Recording stopped and preparing the file to be shared on youtube";
                                    MainActivity.this.initTTS();
                                    response = Get(iptouse + "stop");
                                    is_start = true;
                                    startuploadstatusthread = true;
                                    servercheckCounter = 0;
                                }

计时器然后启动，但它在执行

时没有停止

timers.StopTimer(timerValueRecord);

我检查了一个断点它到了那里，但计时器永远不会停止并继续。

Answer 1

customHandler.removeCallbacks(updateTimerThread);

而不是

customHandler.removeCallbacks(updateTimerThread = new UpdateTimerThread(timerValue));

你不能指望处理程序找到一个对象，如果你销毁它来代替它。

为什么在新课程中启动计时器时它正在工作但是当试图停止计时器时它不是？

1 个答案: