libc：pthread_create 失败：无法分配 1040384 字节堆栈：内存不足

Question

我有一个 EventBus() 运行并循环，直到我的应用程序启动时它转到我的另一个 Fragment。当我将应用程序闲置至少 30++ 分钟时，我得到了这个堆栈跟踪：

10-11 10:23:46.315 3790-4797/com.jti.mikee.jti_pos W/libc: pthread_create failed: couldn't allocate 1040384-byte stack: Out of memory
10-11 10:23:46.315 3790-4797/com.jti.mikee.jti_pos E/dalvikvm: pthread_create (stack size 16384 bytes) failed: Try again

我也在onCreateView()上使用ScheduleExecutorService()

scheduledExecutorService = Executors.newScheduledThreadPool(4);

这是我EventBus()的声明

 public static final Runnable mRunnable = new Runnable() {
    @Override
    public void run() {
        EventBus.getDefault().post(new EB_TapCard());
    }
};

在我的onResume() 这是代码

 @Override
public void onResume() {
    Log.e("current_module",current_module);

    super.onResume();
    try {
        EventBus.getDefault().register(this);
        rfscanner = scheduledExecutorService.scheduleAtFixedRate(mRunnable, 0, 2, TimeUnit.SECONDS);
    } catch (Throwable e) {
        e.printStackTrace();
    }
}

最后，这是我的onPause() 方法

 @Override
public void onPause() {
    try {
        getContext().unregisterReceiver(broadcastReceiver);
    } catch (Throwable e) {
        e.printStackTrace();
    }
    rfscanner.cancel(true);
    EventBus.getDefault().unregister(this);
    super.onPause();
}

我想知道当我闲置设备时，可运行对象仍在运行。如何暂停/恢复它？非常感谢。

编辑

到目前为止，我已经尝试添加一个函数Callback()。它运行良好，但在我点击卡片后，读卡器没有读取第二张卡片。我怎样才能让它循环而不使内存满？？

class CallBackThread extends Thread {

    @Override
    public void run() {

        try {
            RFCardInterface.waitForCardPresent(RFCardInterface.CONTACTLESS_CARD_MODE_AUTO, 1, -1);
            if (RFCardInterface.isCallBackCalled &&
                    RFCardInterface.notifyEvent.eventID == RFCardInterface.CONTACTLESS_CARD_EVENT_FOUND_CARD) {

                IDCatcher = StringUtility.ByteArrayToString(RFCardInterface.notifyEvent.eventData,
                        RFCardInterface.notifyEvent.eventData.length);

                IDCatcher = IDCatcher.substring(9, 21).replace(" ", "");
                Log.e("IDCatcher", IDCatcher);


                EventBus.getDefault().post(new EBTest2());
            }

        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

Answer 1

尝试以下方法：

private Handler mHandler;                           // the handler to this activity
private Runnable mCallback;        // the callback to 2s loop

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // ...
    mHandler = new Handler();
    mCallback = new Runnable() {
        @Override
        public void run() {
            EventBus.getDefault().post(new EB_TapCard());
            // schedule next run here
            scheduleNextRun();            
        }
    };
}

@Override
public void onResume() {
    scheduleNextRun();
} 

@Override
public void onPause() {
    cleanUpRun();
} 

@Override
public void onDestroy() {
    // needed in case the system will force-kill your process
    cleanUpRun();
} 

private void cleanUpRun() {
    if (mHandler != null) {
        mHandler.removeCallbacks(mCallback);
    }
}

private void scheduleNextRun() {
    // clean up beforehand
    cleanUpRun();
    if (mHandler != null) {
        mHandler.postDelayed(mCallback, 2000L);
    }
}

想法是每次进入页面时，都会对runnable进行post-delay，外出时将其移除；一旦你运行它，它就会执行回调，你安排下一次运行，等等。