android app activitythread performlaunchactivity

Thread communication, Activitythread, and thread classes are key to understanding Android threading management.threads, as the basic unit of CPU scheduling resources, have a very important and fundamental role in the operating system for embedded devices such as Android. This section is mainly from the following three aspects of analysis: "

. mcwill. mcwillsettings:Make sure class name exists, is public, and has an empty constructor that is public E/androidruntime (3253): at Android. App. activitythread. initialize mlaunchactivity (activitythread. Java: 1964)E/androidruntime (3253): at Android.

method call is ultimately called the context object to complete, as for Contextthremewrapper, obviously and theme, So the activity inherits from the Contextthemmwrapper, and the service inherits from Contextwrapper, Contextimpl is the only class that truly implements the method in the context.From the above inheritance relationship, each activity is a context, each service is a situation, which is why the use of the context of the place can be activity or service replacement. Create contextAcc

Create an app window one, create a Activity1. The application window must correspond to the ACTIVITY,AMS notification client Activitythread start activity. Reflection Create Activity ObjectSecond, create Window2. The Activity.attach () method sets the internal variable. 3. The Activity.attach () method creates a Window object. Policymanager.makenewwindow () Create (via Com.android.internal.policy.impl.Polic

Objective As Android developers, presumably more or less to touch the start speed optimization related things, when the user more and more, the product function with more and more iterations, the App gradually become bloated is a very common phenomenon, even can be said to be unavoidable phenomenon, followed by the work is to optimize the performance of the app,

Source: Android App Run processFirst, Activitythread starts execution from the main () function, and calls Preparemainlooper () to create a message queue (MessageQueue) for the UI thread.A Activitythread object is then created, and an H (Handler) object and a Applicationthread (Binder) object are created in the initial

. loop (lorule. java: 194) At android. app. ActivityThread. main (ActivityThread. java: 5392) At java. lang. reflect. Method. invokeNative (Native Method) At java. lang. reflect. Method. invoke (Method. java: 525) At com. android. internal. OS. ZygoteInit $ MethodAndArgsCall

This article introduces some of the relevant knowledge of Android app startup, including app startup, app startup and App startup optimization! App application startup mode 1. Cold start When the application is started, the bac

is the meaning of persistent application? Simply put, this application will run stubbornly in the system, from the start of the system to the system shutdown.To ensure this persistence, the persistent application must be able to automatically restart when an exception occurs. This is achieved in Android. In each activitythread, there will be a binder entity--final Applicationthread Mappthread that speciali