在安卓系统中防止双击按钮的最佳方法是什么?
当前回答
我需要与片段一起工作,只是放一个标志来控制点击:我只想要第一个,其他的不能访问监听器
private boolean flag = true;
...
@Override
public void onClick(View view) {
...
if (flag) {
...
listener.onFragmentInteraction(Constants.MY_FRAGMENT, bundle);
flag = false;
}
...
}
希望对大家有用,有不正确的地方请指正
其他回答
下面是kotlin扩展函数的方式,将工作于所有视图,保持以下函数在您的Utils或任何文件
fun View.preventDoubleClick() {
this.isEnabled = false
this.postDelayed( { this.isEnabled = true }, 1000)
}
下面是如何从片段或活动中使用它
anyIdOfView?.setOnClickListener {
it.preventDoubleClick()
YourAction()
}
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;
}
}
如果你不想(或不能)使用布尔标志或覆盖onClickListener,你也可以尝试用android:launchMode="singleTop"在AndroidManifest.xml声明你的活动。
它是如何工作的?
如果活动的实例位于堆栈顶部- new activity不会被创建,相反- onNewIntent()将被调用。 活动可以有多个实例 实例可以驻留在不同的任务中 一个任务可以有多个实例
I found none of these suggestions works if the onClick method doesn't return immediately. The touch event is queued by Android and the next onClick is called only after the first one is finished. (Since this is done on the one UI thread this is really normal.) I needed to use the time when the the onClick function is finished + one boolean variable to mark whether the given onClick is running. Both these marker attributes are static to avoid any onClickListener to run at the same time. (If user clicks on another button) You can simple replace your OnClickListener to this class and instead of implementing the onClick method you need to implement the abstract oneClick() method.
abstract public class OneClickListener implements OnClickListener {
private static boolean started = false;
private static long lastClickEndTime = 0;
/* (non-Javadoc)
* @see android.view.View.OnClickListener#onClick(android.view.View)
*/
@Override
final public void onClick(final View v) {
if(started || SystemClock.elapsedRealtime()-lastClickEndTime <1000 ){
Log.d(OneClickListener.class.toString(), "Rejected double click, " + new Date().toString() );
return;
}
Log.d(OneClickListener.class.toString(), "One click, start: " + new Date().toString() );
try{
started = true;
oneClick(v);
}finally{
started = false;
lastClickEndTime = SystemClock.elapsedRealtime();
Log.d(OneClickListener.class.toString(), "One click, end: " + new Date().toString() );
}
}
abstract protected void oneClick(View v);
}
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;
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