在安卓系统中防止双击按钮的最佳方法是什么?
当前回答
这个解决方案(Kotlin)对我很有效:
abstract class SingleClickListener : View.OnClickListener {
private val MIN_CLICK_INTERVAL: Long = 1000
private var mLastClickTime: Long = 0
abstract fun onSingleClick(v: View?)
override fun onClick(v: View?) {
if (mLastClickTime <= 0) {
mLastClickTime = SystemClock.uptimeMillis()
onSingleClick(v)
return
}
if (SystemClock.uptimeMillis() - mLastClickTime <= MIN_CLICK_INTERVAL) {
return
}
mLastClickTime = SystemClock.uptimeMillis()
onSingleClick(v)
}
}
用法:
someView.setOnClickListener(object : SingleClickListener() {
override fun onSingleClick(v: View?) {
v?.also { klik(it) }
}
})
或者也可以创建扩展函数,在视图上轻松添加ClickListener:
fun View.click(klik: (View) -> Unit) {
this.setOnClickListener(object : SingleClickListener() {
override fun onSingleClick(v: View?) {
v?.also { klik(it) }
}
})
}
// Usage
class XPerimentActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_xperiment_layout)
submit_button.click {
// do your magic
}
}
}
其他回答
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。
KLEANEST Kotlin惯用方式:
class OnSingleClickListener(private val block: () -> Unit) : View.OnClickListener {
private var lastClickTime = 0L
override fun onClick(view: View) {
if (SystemClock.elapsedRealtime() - lastClickTime < 1000) {
return
}
lastClickTime = SystemClock.elapsedRealtime()
block()
}
}
fun View.setOnSingleClickListener(block: () -> Unit) {
setOnClickListener(OnSingleClickListener(block))
}
用法:
button.setOnSingleClickListener { ... }
或者加上一个控制油门的附加参数
class OnClickListenerThrottled(private val block: () -> Unit, private val wait: Long) : View.OnClickListener {
private var lastClickTime = 0L
override fun onClick(view: View) {
if (SystemClock.elapsedRealtime() - lastClickTime < wait) {
return
}
lastClickTime = SystemClock.elapsedRealtime()
block()
}
}
/**
* A throttled click listener that only invokes [block] at most once per every [wait] milliseconds.
*/
fun View.setOnClickListenerThrottled(wait: Long = 1000L, block: () -> Unit) {
setOnClickListener(OnClickListenerThrottled(block, wait))
}
Usages:
button.setOnClickListenerThrottled(2000L) { /** some action */}
or
button.setOnClickListenerThrottled { /** some action */}
这是我的解决方案:
if (waitDouble) {
waitDouble = false;
Thread thread = new Thread() {
@Override
public void run() {
try {
sleep(300);
if (waitDouble == false) {
waitDouble = true;
singleClick(); //singleClick
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
thread.start();
} else {//DoubleClick
DoubleClick();
waitDouble = true;
}
或者另一种解决方案:
public class NoDoubleClickUtils {
private static long lastClickTime;
private final static int SPACE_TIME = 500;
public static void initLastClickTime() {
lastClickTime = 0;
}
public synchronized static boolean isDoubleClick() {
long currentTime = System.currentTimeMillis();
boolean isClick2;
if (currentTime - lastClickTime > SPACE_TIME) {
isClick2 = false;
} else {
isClick2 = true;
}
lastClickTime = currentTime;
return isClick2;
}
}
如果你在onClick()中进行计算密集型工作,则禁用按钮或设置不可点击是不够的,因为单击事件可以在禁用按钮之前排队。我写了一个实现OnClickListener的抽象基类,你可以重写,通过忽略任何排队点击来修复这个问题:
/**
* This class allows a single click and prevents multiple clicks on
* the same button in rapid succession. Setting unclickable is not enough
* because click events may still be queued up.
*
* Override onOneClick() to handle single clicks. Call reset() when you want to
* accept another click.
*/
public abstract class OnOneOffClickListener implements OnClickListener {
private boolean clickable = true;
/**
* Override onOneClick() instead.
*/
@Override
public final void onClick(View v) {
if (clickable) {
clickable = false;
onOneClick(v);
//reset(); // uncomment this line to reset automatically
}
}
/**
* Override this function to handle clicks.
* reset() must be called after each click for this function to be called
* again.
* @param v
*/
public abstract void onOneClick(View v);
/**
* Allows another click.
*/
public void reset() {
clickable = true;
}
}
用法与OnClickListener相同,但重写OnOneClick()代替:
OnOneOffClickListener clickListener = new OnOneOffClickListener() {
@Override
public void onOneClick(View v) {
// Do stuff
this.reset(); // or you can reset somewhere else with clickListener.reset();
}
};
myButton.setOnClickListener(clickListener);
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;
}
}
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