在安卓系统中防止双击按钮的最佳方法是什么?


当前回答

在kotlin

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

其他回答

我的解决方案是

package com.shuai.view;

import android.os.SystemClock;
import android.view.View;

/**
 * 处理快速在某个控件上双击2次(或多次)会导致onClick被触发2次(或多次)的问题
 * 通过判断2次click事件的时间间隔进行过滤
 * 
 * 子类通过实现{@link #onSingleClick}响应click事件
 */
public abstract class OnSingleClickListener implements View.OnClickListener {
    /**
     * 最短click事件的时间间隔
     */
    private static final long MIN_CLICK_INTERVAL=600;
    /**
     * 上次click的时间
     */
    private long mLastClickTime;

    /**
     * click响应函数
     * @param v The view that was clicked.
     */
    public abstract void onSingleClick(View v);

    @Override
    public final void onClick(View v) {
        long currentClickTime=SystemClock.uptimeMillis();
        long elapsedTime=currentClickTime-mLastClickTime;
        //有可能2次连击,也有可能3连击,保证mLastClickTime记录的总是上次click的时间
        mLastClickTime=currentClickTime;

        if(elapsedTime<=MIN_CLICK_INTERVAL)
            return;

        onSingleClick(v);        
    }

}

用法类似于OnClickListener,但重写onSingleClick()代替:

mTextView.setOnClickListener(new OnSingleClickListener() {
            @Override
            public void onSingleClick(View v) {
                if (DEBUG)
                    Log.i("TAG", "onclick!");
            }
     };

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).

setEnabled(false)非常适合我。

我写{setEnabled(true);},并在第一次点击按钮时将其设为false。

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;
    }

}

扩展的Kotlin方法:

fun View.setOneTimeClickListener(delayMillis: Long = 1000, block: () -> Unit) {
    setOnClickListener {
        this.isEnabled = false
        block()
        postDelayed({ isEnabled = true }, delayMillis)
    }

在代码中的用法:

someView.setOneTimeClickListener { someFun() }

delayMillis参数可用于设置按钮将被禁用的时间。

someView.setOneTimeClickListener(500) { someFun() }