如果之前的密码没有解除锁定，为什么我的密码会进入锁定区域？

问题描述

我的项目有一个按钮。当按钮被按下时，它执行一个函数，SimulateDataUpload。 此 SimulateDataUpload 被 lock.lock() 锁定。 有一个 for 循环，打包在一个 runnable 中，它更新进度条。 runnable 的 onRun 也用 lock.lock() 锁定。 当我快速单击按钮两次时，很明显 for 循环尚未完成迭代，因此不应释放锁。为什么代码再次输入 SimulateDataUpload？

MainActivity 中的代码：

// defined before onCreate();
private Lock lock = new ReentrantLock();

// defined in onCreate();
simulateDataUploadButton.setOnClickListener(new View.OnClickListener()
{
    @Override
    public void onClick(View v)
    {
       SimulateDataUpload();
    }
});


public void SimulateDataUpload()
{
    lock.lock();
    try 
    {
        Log.i("myTag","Thread name: " + Thread.currentThread().getName()
           + ". Inside SimulateDataUpload. lock acquired.");
        Handler uiOperationsHandler = new Handler();
        setUiElements(true);

        Runnable simulateDataUploadRunnable = new Runnable() 
        {
            @Override
            public void run() 
            { 
                lock.lock();
                    try 
                    {
                         Log.i("myTag","Thread name: " 
                            + Thread.currentThread().getName() 
                            + ". Inside runnable threadLockObject. lock 
                            acquired.");
                        for (int i = 0; i < maxProgressBar + 1; i++) 
                        {
                            try 
                            {
                                Thread.sleep(500);
                            } 
                            catch (InterruptedException e) 
                            {
                                e.printStackTrace();
                            }

                            int finalI = i;
                            uiOperationsHandler.post(new Runnable() 
                            {
                                @Override
                                public void run() 
                                {
                                    Log.i("myTag","Thread name: " 
                                        + Thread.currentThread().getName() 
                                        + ". i: " + finalI 
                                        + ". Inside 
                                        uiOperationsHandler.post.");
                                    taskCompletedEventListener.
                                             getCallBackFunction().
                                             onTaskCompletedEvent(finalI == 
                                             maxProgressBar);
                                }
                            });
                        }
                    }
                    finally
                    {
                        lock.unlock();
                        Log.i("myTag","Thread name: " 
                            +Thread.currentThread().getName() 
                            +". lock released.");
                    }
            }
        };

        Thread simulateDataUploadThread = new 
            Thread(simulateDataUploadRunnable);
        simulateDataUploadThread.start();
    }
    finally
    {
        lock.unlock();
        Log.i("myTag","Thread name: " +Thread.currentThread().getName() 
           +". lock released.");
    }
}

这里是按钮只点击一次时的正常输出：

I/myTag: Thread name: main. Inside SimulateDataUpload. lock acquired.
I/myTag: Thread name: Thread-8. Inside runnable threadLockObject. lock acquired.
I/myTag: Thread name: main. lock released.
I/myTag: Thread name: main. i: 0. Inside uiOperationsHandler.post.
I/myTag: Thread name: main. i: 1. Inside uiOperationsHandler.post.
I/myTag: Thread name: main. i: 2. Inside uiOperationsHandler.post.
I/myTag: Thread name: main. i: 3. Inside uiOperationsHandler.post.
I/myTag: Thread name: Thread-8. lock released.

这是单击按钮两次时的输出。我不明白为什么我要第二次输入“Inside SimulateDataUpload...”，但很明显带有锁定对象的可运行对象尚未释放锁定（尚未完成其 for 循环迭代）：

I/myTag: Thread name: main. Inside SimulateDataUpload. lock acquired.
I/myTag: Thread name: main. lock released.
I/myTag: Thread name: Thread-11. Inside runnable threadLockObject. lock acquired.
I/myTag: Thread name: main. i: 0. Inside uiOperationsHandler.post.
I/myTag: Thread name: Thread-11. lock released.
I/myTag: Thread name: main. Inside SimulateDataUpload. lock acquired.
I/myTag: Thread name: main. lock released.
I/myTag: Thread name: Thread-12. Inside runnable threadLockObject. lock acquired.
I/myTag: Thread name: main. i: 1. Inside uiOperationsHandler.post.
I/myTag: Thread name: main. i: 2. Inside uiOperationsHandler.post.
I/myTag: Thread name: main. i: 3. Inside uiOperationsHandler.post.
I/myTag: Thread name: main. i: 0. Inside uiOperationsHandler.post.
I/myTag: Thread name: main. i: 1. Inside uiOperationsHandler.post.
I/myTag: Thread name: main. i: 2. Inside uiOperationsHandler.post.
I/myTag: Thread name: Thread-12. lock released.
I/myTag: Thread name: main. i: 3. Inside uiOperationsHandler.post.

解决方法

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