在安卓系统中防止双击按钮的最佳方法是什么?


当前回答

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);
}

其他回答

这个解决方案既快速又简洁。

基本上你只是在应用程序的基本样式中防止双击,并在点击监听器上实现标准。这就像一种魔力,在不同的观点的同时进行触摸。

<style name="AppTheme" parent="Theme.AppCompat.NoActionBar">
...
<item name="android:splitMotionEvents">false</item>
<item name="android:windowEnableSplitTouch">false</item>
</style>

如果你的应用程序使用某种手势事件,这不是正确的答案。

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);

如果按钮做的唯一一件事是启动一个新活动,这个问题可以通过“singleTop”活动启动模式和在意图上设置FLAG_ACTIVITY_CLEAR_TOP来解决。这种方法不适用于复杂活动的层次结构,但适用于简单的树状应用程序结构。

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()
}

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 */}