Leakcanary总结

2.7版本监控对象:
activity
fragment
viewmodel（自己创建一个viewmodle，在clear的时候hook获取ViewModelStore里面的mMap，就可以获取viewmodel进行检测。
view（hook windowmanagerglobal的mviews，替换为自己的arraylist，在add函数在addOnAttachStateChangeListener，触发onViewDetachedFromWindow的时候检测。
sevice（hook activitythread的mcallback）

 fun appDefaultWatchers(
    application: Application,
    reachabilityWatcher: ReachabilityWatcher = objectWatcher
  ): List<InstallableWatcher> {
    return listOf(
      ActivityWatcher(application, reachabilityWatcher),
      FragmentAndViewModelWatcher(application, reachabilityWatcher),
      RootViewWatcher(reachabilityWatcher),
      ServiceWatcher(reachabilityWatcher)
    )
  }

触发gc

override fun runGc() {
      // Code taken from AOSP FinalizationTest:
      // https://android.googlesource.com/platform/libcore/+/master/support/src/test/java/libcore/
      // java/lang/ref/FinalizationTester.java
      // System.gc() does not garbage collect every time. Runtime.gc() is
      // more likely to perform a gc.
      Runtime.getRuntime().gc()
      enqueueReferences()
      System.runFinalization()
}

dump

Debug.dumpHprofData(heapDumpFile.absolutePath)

Analysis,采用shake

heapAnalyzer.analyze()