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When an app component starts and the app does not run any other components, the Android system launches a new Linux process for the app using a single thread of execution. By default, all components of the same app run in the same process and thread (called the "main" thread). If an app component starts and the app already has a
Http://wear.techbrood.com/guide/components/processes-and-threads.htmlEach Android app will start a process by default unless you use Android:process to implement multiple processes.Each process has a Dalvik virtual machine instance to execute the code.In the process, there is only one main thread (UI thread), and the 4
duration)Scroll, StartX, starty to start scrolling position, dx,dy for scrolling offset, duration for time to complete scrollingMscroller.computescrolloffset ()A return value of Boolean,true indicates that scrolling has not been completed and false indicates that scrolling is complete. This is a very important method, usually placed in View.computescroll (), to determine whether scrolling is over or not.The specific use of scroller has been useful in my previous blog post, please go to the
Android: inter-process communication
Intent ComponentName broadcast-BroadcastReceiver ContentProvider AIDLComponentName of Intent
Intent is our most commonly used data transmission channel, especially opening an Activity through Intent, so everyone will be familiar with it. We usually use Intent to open the internal Activity of the same process (App). To achieve
In the previous article, we analyzed the connection process between Android applications and SurfaceFlinger services. After the Android Application successfully connects to the SurfaceFlinger service, an anonymous shared memory is required to share its UI metadata with the SurfaceFlinger service so that the SurfaceFlinger service can correctly create and render t
This issue is answered on stack over flow.Original link Address: http://stackoverflow.com/questions/27589844/android-studio-1-0-2-not-building-appmergedebugresources-errorWorkaround:// Run the following two instructions on the terminal respectively, install lib32stdc++6 and lib32z1sudo apt-get install lib32stdc++6sudo apt-get install Lib32z1Problem reason: Ubuntu can ' t run the AAPT on + bit before installing this packagesUbuntu under
Android mobile guard-md5 encryption process, android-md5
In the previous article, we stored the user's password using SharedPreferences, and opened/data/com. wuyudong. the config. import the xml file to the local device to view the content:
The password is in plain text, which is very insecure. Md5 encryption is used here
For more information, see http://www.cnb
We need start a new process when we tap application launcher or start a new service which is in a different process. this artical will describe how a new process is created but no matter whoever the caller is.
1. startprocesslocked in activitymanagerservice. JavaIgnore rest of the function and focus on below code.
Int pid = p
In the previous section, we explained the local service. This section mainly describes remote service, which involves aidl. Okay, old rules. Let's start with the basic knowledge:
I. Basic Knowledge
Role of aidl On the Android platform, each application
Program All apps are running in their own process space. Generally, one process cannot access the memory
access to the system services, there is no context is not possible. So call Activitythread through reflection. Get application.My initial idea was to inject Inj_dalvik into the system_server process and then access all of the Android system services, but then found that there were two problems with Dex in System_ The server process cannot run with the remote ser
It's not too difficult to look at the original text. I just want to repost it here. Let's take a look!
Conversion from: http://www.androidenea.com/2009/06/android-boot-process-from-power-on.html (Wall flip required)
Since mobile platforms and embedded systems has some differences compared to desktop systems in how they initially start up and boot. this post will discuss the initial boot stages of an
can only reboot, can not be shutdown operation, you will be able to track the process in the course of the discovery, It is true that there is an associated interface with a shutdown. So what's the use of shutting down the machine?Frameworks/base/services/java/com/android/serverbatteryservice.java
Private final void Shutdownifnopower () {
//Shut down gracefully if we battery are critically low and
Android compilation process (I): http://www.cnblogs.com/mr-raptor/archive/2012/06/07/2540359.html
Android compilation process (2): http://www.cnblogs.com/mr-raptor/archive/2012/06/08/2541571.html
Android compilation process (3): h
It is almost impossible for an Android system to keep an application process permanently, so the system needs to constantly release old or less important processes to free up enough memory to run new or more important processes, so how does the system decide which process should keep what should be killed? Originally the system will be based on the running compon
ositingdescendantsCompositingreasonperspectiveCompositingreasonpreserve3dCompositingreasonreflectionofcompositedparentCompositingreasonrootCompositingreasonlayerforclipCompositingreasonlayerforscrollbarCompositingreasonlayerforscrollingcontainerCompositingreasonlayerforforegroundCompositingreasonlayerforbackgroundCompositingreasonlayerformaskRenderlayer that are considered to be synthetic layers will create renderlayerbacking,renderlayerbackingThe relationship with the composited layer is one by
android-process life cycle A process level is prioritized as follows: 1 active Processes: Active process The existence period is in the activity Resume () [Activity restart] State is in the state that is interacting with the bound service is in a state where the service is running in the foreground (Setforegroun
The input event process of android2.3 is significantly different from that of previous versions. Here we will perform a detailed analysis and finally put the Demo code used for analysis here:
Http://code.google.com/p/flying-on-android/
The following analysis is based on these source code. You can download the source code and view the document. In the source code, you only need to pay attention to the flying
In Android Application Development, cross-process communication is used, such as calling dialing, text messages, and emails in third-party applications, when data is transmitted in this process, the current application (one process) calls another application (the second process
Process processes in the 1:androidWhen an Android app starts, the system starts a process and a main thread to run the app.The Android system will do its best to keep the process stable and secure.However, in some special cases, the old
1, foreground process is in activity resume status is in the state of bound service interaction The state in which the service is running in the foreground (Startforeground () is called) service life cycle is being executed (onCreate (), OnStart (), OnDestroy ()) Broadcastreceiver is executing the onreceive () method killing foreground requires a user response because this security priority is the highest is required for user action, at a
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