Android内存泄漏分析及检测工具LeakCanary简介
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View
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Service
fun appDefaultWatchers(
application: Application,
reachabilityWatcher: ReachabilityWatcher = objectWatcher
): List {
return listOf(
ActivityWatcher(application, reachabilityWatcher),
FragmentAndViewModelWatcher(application, reachabilityWatcher),
RootViewWatcher(reachabilityWatcher),
ServiceWatcher(reachabilityWatcher)
)
}
首先我们来看一下ObjectWatcher ，它的关键代码如下：
@Synchronized fun watch(
watchedObject: Any,
description: String
) {
if (!isEnabled()) {
return
}
removeWeaklyReachableObjects()
val key = UUID.randomUUID()
.toString()
val watchUptimeMillis = clock.uptimeMillis()
val reference =
KeyedWeakReference(watchedObject, key, description, watchUptimeMillis, queue)
SharkLog.d {
"Watching " +
(if (watchedObject is Class<*>) watchedObject.toString() else “instance of ${watchedObject.javaClass.name}”) +
(if (description.isNotEmpty()) " ($description)" else “”) +
" with key $key"
}
watchedObjects[key] = reference
checkRetainedExecutor.execute {
moveToRetained(key)
}
}
主要是对watchedObject使用了弱引用，同时注意到里面使用了ReferenceQueue，这两者结合使用可以实现如果弱引用关联的对象被回收，就会把这个弱引用加入到queue中，以此来判断该对象是否被回收。
LeakCanary主要的检测对象是以上4种，以Activity为例进行分析，其他检测类型也是类似原理，不再赘述。
class ActivityWatcher(
private val application: Application,
private val reachabilityWatcher: ReachabilityWatcher
) : Ins