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start will not go application this step, but directly go mainactivity (including a series of measurement, Layout, drawing), So the hot-start process simply needs to create and initialize a mainactivity, without having to create and initialize the application,Because an application is created from the new process to the destruction of the process, application is
the image so that the image is long (wide) equal to or greater than the length (width) of the viewCenter_inside/centerinside Displays the contents of the picture in full, by scaling it down or the original size to make the picture long/wide equal to or less than the length/width of the viewFit_center/fitcenter enlarge/Shrink the picture to the width of the view, centered on the displayFit_end/fitend Zoom in/out to the width of the view, displayed in the lower part of the viewFit_start/fitstart
Basic Concepts:
Process: The basic unit of the resource allocation and height of a computer, the entity that the program runs, and the container of the thread.
Threads: The unit that is actually executing in a process, the smallest unit of program execution, and belongs to a process.
A process can have more than one th
For Android Developers, ANR (Application Not Responding) is a common problem. Generally, if an ANR occurs, the system generates a trace file in the/data/anr/directory. By analyzing the trace file, you can locate the cause of the ANR. There are many reasons for the generation of ANR, such as CPU usage is too high, events are not responded to in a timely manner, deadlocks, etc. Next we will solve the ANR problem caused by deadlocks, to describe how to a
First take a look at the entire process of using the Java language for Android applications from the source code to the installation package, which includes compilations, links, and signatures, as follows:
(1) using the AAPT tool to generate R.java files
You can create an automatically android project first by building an eclipse development environment, and
process: The process that the component is running is controlled by manifest file. Component Nodes
All components are instantiated in the main thread of the process, and the system calls the components apart from the main thread. Not every object will be detached from the main thread. In general, methods and notifications for responses such as View.onkeydown
In Android, all components of the same app run in the same process by default, but you can also specify which process the component will run by modifying the Android:process property in the manifest file, or let the components of different applications run in the same process. Of course, these apps share a user ID and
Nowadays, many people want to automate the compilation and packaging of Android projects, such as building a daily system and generating release files automatically. We need to have an in-depth understanding of the compilation and packaging of the android project. At least we need to know what each step of the android project has done and what environment and too
Previously, I briefly described the android startup process at http://blog.csdn.net/codectq/article/details/7383231,but it is not perfect.
Now I have encountered some practical problems in the project. In turn, I will read the code and review the android startup process after the kernel is started.
The systemserver. cp
Android ends the process and closes the program. After several days of research, we found that Android ends the process.
The following class is used:
Void android. app. ActivityManager. restartPackage (String packageName)
Public void restartPackage (String packageName)
Since
Nowadays, many people want to automate the compilation and packaging of Android projects, such as building a daily system and generating release files automatically. We need to have an in-depth understanding of the compilation and packaging of the android project. At least we need to know what each step of the android project has done and what environment and too
Thread
When an application starts, the android system will create an execution thread called "Main" for the application. This thread is very important because it is responsible for scheduling events for the appropriate user interface window, including plotting events. It is also the thread in which your application interacts with components in the android UI tool (these components are from
principals. In general, these trusted organizations have installed their root certificates on your device before the device leaves the factory. Therefore, the digital certificate can ensure that the public key in the digital certificate is indeed the owner of the certificate, or the certificate can be used to confirm the identity of the other party. Digital Certificates are mainly used to solve the security issue of public keys.To sum up, the general proces
objects in the server process to the client process. In this way the client process has got what it wants. Cross-process communication complete!This article is written mainly I learn binder when the pain point, I read a lot of articles about binder, found that many are not the binder drive, I am very confused to force
This article mainly introduces the Linux kernel startup process and the process of mounting the android root file system, as well as the analysis of the file system in the android source code.
1. Introduction to the main source code directoryMakefile (Global makefile)Bionic)Bootable)Build (the content in the build dire
@ bixiaopengtekimacbook-pro ~ $ ADB Shell
Shell @ Android:/$ su
Shell @ Android :/#
7. Run tcpdump
Perform packet capture analysis on the mobile phone
#/Data/local/tcpdump-p-VV-S 0-W/sdcard/capture. pcap
The value following got is increasing, indicating that the data packet is being captured.
8. packet capture interrupted
After the command is executed, run Ctrl + C in the Command Prompt window to interru
you can expose the AIDL interface (MyBinder) to the client through RemoteService ). Now, if the client (such as an Activity) calls bindService () to connect to this server (RemoteService), The onServiceConnected () callback function of the client will obtain the onBind () from the server (RemoteService () the returned MyBinder object.
Here we will summarize the writing process of the server:
1. Create a. aidl file:
This file (YourInterface. aidl) def
Android Development Environment article
I. Installation: Required Packages
Android requires the following system Packages:flex:This Lexical Analyzer generator is used to read a given input file F Or a description of a scanner to generate. Bison:this is a general-purpose parser generator. Gperf:this is a perfect hash function generator. Libesd0-dev:this Enlightened sound daemon (dev files) are used to mixes
Reprint: http://www.51testing.com/html/34/n-3725434.html? Once you have a basic understanding of the whole, then look at the details and talk aboutAndroidApplication Start-upProcessA lotarticleAre all kinds of source code classes and methods of a bunch of call relationships, such an article even look 100 times, but also just foggy. Source to see, but it is best not to fall into the details of the source code, can not extricate themselves. Here stand on the basis of predecessors to do a summary.
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