android view事件去抖动
2020-08-04 本文已影响0人
WLHere
用动态代理实现去抖动的工具类
使用方法
- 通过扩展使用
findViewById<View>(R.id.btn).setOnClickListener(View.OnClickListener { }.debounce())
- 直接通过方法调用使用
findViewById<View>(R.id.btn).setOnClickListener(DebounceUtil.debounce(View.OnClickListener { }))
源码如下:
https://github.com/WLHere/Snippet/blob/master/util/DebounceUtil.kt
package com.bwl.test
import android.os.SystemClock
import java.lang.reflect.InvocationHandler
import java.lang.reflect.Method
import java.lang.reflect.Proxy
/**
* Created by WLHere on 2020/8/4
*/
fun <R> Any?.debounce(): R {
return DebounceUtil.debounce(this)
}
fun <R> Any?.debounce(interval: Long): R {
return DebounceUtil.debounce(this, interval)
}
object DebounceUtil {
private const val DEFAULT_DURATION = 500L// 默认的时间
fun <R> debounce(listener: Any?): R {
return debounce(listener, DEFAULT_DURATION)
}
fun <R> debounce(listener: Any?, timeInterval: Long): R {
if (listener == null) {
return listener as R
}
val messages = listener.javaClass.interfaces
require(!messages.isNullOrEmpty()) { "必须实现一个接口" }
return Proxy.newProxyInstance(listener.javaClass.classLoader, messages, object :
InvocationHandler {
private val results = HashMap<Method, Pair<Long, Any?>>()
@Throws(Throwable::class)
override fun invoke(proxy: Any, method: Method, args: Array<Any>): Any? {
var result = results[method]
val curTime = SystemClock.elapsedRealtime()
if (result == null || curTime - result.first > timeInterval) {
result = Pair(curTime, method.invoke(listener, *args))
results[method] = result
}
return result.second
}
}) as R
}
}