在安卓系统中防止双击按钮的最佳方法是什么?


当前回答

我更喜欢使用信号量块。它是线程安全的,不仅可以用于按钮。

代码示例很简单:

private UtilsSemaphore buttonSemaphore = new UtilsSemaphore();

public void onClick(View view)
{

    boolean isAllowed = buttonSemaphore.lock();

    if(!isAllowed)
    {
        return;
    }

    final View clickedButton = view;

    clickedButton.setEnabled(false);

    /* some code */

    buttonSemaphore.unlock();
    clickedButton.setEnabled(true);
}


public class UtilsSemaphore {

    public int counter = 0;

    public boolean lock()
    {
        int counterValue = ++counter;
        boolean isAllowed = counterValue < 2;

        if(!isAllowed)
        {
            unlock();
        }

        return isAllowed;
    }

    public void unlock()
    {
        --counter;
    }

}

其他回答

将Clickable设置为false对第一次双击不起作用,但后续双击将被阻止。这就好像第一次加载点击委托比较慢,第二次点击在第一次完成之前就被捕获了。

        Button button = contentView.FindViewById<Button>(Resource.Id.buttonIssue);
        button.Clickable = false;
        IssueSelectedItems();
        button.Clickable = true;

这个问题的实际解决方案是使用setEnabled(false),灰色按钮,和setClickable(false),使它第二次点击不能接收,我已经测试过了,它似乎是非常有效的。

在kotlin

button.setOnClickListener { 
    it?.apply { isEnabled = false; postDelayed({ isEnabled = true }, 400) } //400 ms
    //do your work
}

Setting the button as clickable false upon clicking and true once it is desired to make the button clickable again is the right approach. For instance, consider the following scenario: you are making a service call upon click of a button and once the service is done you want to display a dialog. For this, once the button is clicked you can set setClickable(false) and once the service responds you will do setClicklable(true) through a reference you pass to your custom dialog. When dialog invokes isShowing() you can trigger the listener and setClicklable(true).

我们可以像这样使用按钮进行同步:

示例#1 (Java)

@Override
public void onClick(final View view) {
    synchronized (view) {

        view.setEnabled(false);

        switch (view.getId()) {
            case R.id.id1:
                ...
                break;
            case R.id.id2:
                ...
                break;
                ...
        }

        new Handler().postDelayed(new Runnable() {

            @Override
            public void run() {
                view.setEnabled(true);
            }
        }, 1000);
    }
}

示例#2 (kotlin)使用synchronized

myButton.setOnClickListener { view ->
            synchronized(view) {
                view.isEnabled = false

                // do something

                view.postDelayed({ view.isEnabled = true }, 500L)
            }
        }

祝你好运)