Question

我之前发布过有关此项目的信息，我尝试从Home Activity创建一项服务，不断检查屏幕是否已锁定（{ {1}}是ScreenLockService名称。如果是这样，它会创建另一个服务来＆＃34; listen＆＃34; （IntentService's是声音的Listener名称）。如果没有，它将停止现有的IntentService's服务（如果正在运行）。

为此，我在Listener Thread方法中创建了onHandleIntent，该方法应始终检查屏幕是否已锁定。到目前为止，这是如何实现的：

（对不起代码墙，我试着让它看起来很漂亮）

SLS

现在，我有Thread checkScreen = new Thread( new Runnable() { @Override public void run() { Boolean lockInput = false; while(!Thread.interrupted()) { //The first time the screen becomes locked is special, it should start the whole process from there KeyguardManager firstKeyManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE); if (firstKeyManager.inKeyguardRestrictedInputMode()) { lockInput = true; } //If the screen has been locked for the first time: while(lockInput) { //Put a timer here do slow the app down and figure out what's going wrong new Timer().schedule( new TimerTask() { @Override public void run() { //if the screen is locked start listener service else stop listener service (METHODS WITHIN THIS SERVICE HANDLE THIS) KeyguardManager secondKeyManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE); if (secondKeyManager.inKeyguardRestrictedInputMode()) { startListener(); } else if (!secondKeyManager.inKeyguardRestrictedInputMode()) { stopListener(); } } }, 10000 //10 seconds ); } } } } ); //Might be relevant to the problem, if the thread dies I need it to start back up again. //This is part of the onHandleIntent method, at the very bottom, and not inside the thread. checkScreen.setName("checkScreen"); Log.d(TAG, "Starting SLS thread"); checkScreen.start(); checkScreenAlive = true; while(checkScreenAlive){ if(!checkScreen.isAlive()){ Log.d(TAG, "Restarting check screen!"); checkScreen.start(); } }个消息，所以我可以看到应用程序处于什么状态（启动服务，停止服务，检查屏幕，监听等）。当我第一次调试它并锁定屏幕时，直到10秒后它才会记录任何内容，它会使Log大约20次，然后服务就会死掉。

也许我不完全理解计时器在java中是如何工作的，但我不知道服务为什么会死亡。我可能甚至不需要在一个主题中执行此操作，或者甚至不使用Listener Service already running并使用常规IntentService代替。我已经了解了这些差异，我认为我所拥有的是正确的。

如果我应该发布更多代码，请不要犹豫。我试图尽可能简单明了，这是我的第一个应用程序，我仍然很容易被这些东西搞糊涂。

Answer 1

您的while(lockInput) {永远不会设置为false，并会生成大量Timer().schedule个事件。

此schedule将在10秒后启动，这是您看到延迟的地方。

我首先要改变

while(lockInput) { 
...
}

到

if(lockInput) {
    lockInput = false; //Only want this called once per check

    //Put a timer here do slow the app down and figure out what's going wrong
    new Timer().schedule(
        new TimerTask() {

            @Override
            public void run() {

                //if the screen is locked start listener service else stop listener service (METHODS WITHIN THIS SERVICE HANDLE THIS)
                KeyguardManager secondKeyManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);

                if (secondKeyManager.inKeyguardRestrictedInputMode()) {
                    startListener(); 
                } 
                else if (!secondKeyManager.inKeyguardRestrictedInputMode()) {
                    stopListener();
                }
            }
        }, 100 //Fire of the check almost instantly
    );
}

Thread.sleep(10000); //So we are yeilding to the system, don't want an essential while(true) loop

服务中的线程由于某种原因而死亡*

1 个答案: