Question

我正在尝试使用倒数计时器创建一个Android应用程序小部件。我有一个发出HTTP请求的服务，然后是倒数计时器，它更新了app小部件的UI（来自HTTP请求的数据）。无论出于何种原因，倒计时器onTick都不会在服务内部打勾。我没有收到任何错误..

这是我的代码：

override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {

    val request = Request.Builder()
            .url("URL_TO_CALL")
            .build()

    //Make API call
    client.newCall(request).enqueue(object : Callback {
        override fun onFailure(call: Call, e: IOException) {}
        override fun onResponse(call: Call, response: Response) {

            if (Looper.myLooper() == null) {
                Looper.prepare()
                Looper.loop()
            }


            //Create countdown timer object
            var ctd = object : CountDownTimer(countdownTime, 5000) {

                override fun onTick(millisUntilFinished: Long) {
                    //Nothing in here is being called

                }

            }

            Handler().postDelayed({
                ctd.start()
            }, 500)

        }
})

return Service.START_STICKY

}

Answer 1

您输入了WAKE_LOCK吗？

private PowerManager.WakeLock mWakeLock = null;
PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
        mWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
        mWakeLock.acquire();

和onDestroy

if (mWakeLock != null && mWakeLock.isHeld()) {
            mWakeLock.release();
        }

现在，这是当您关闭屏幕时您的应用程序即将关闭

CountDownTimer onTick在服务中不起作用

1 个答案: