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network, memory, and so on. These are necessary for running the kernel, and in order to achieve a specific target, the bootstrapper can set the kernel based on configuration parameters or input data.Android bootloader can be \bootable\bootloader\legacy\usbloader found in.The traditional loader contains a file that needs to be explained here:
Init.s Initialize the stack, clear 0 BBS segment, call MAIN.C's _main () function;
MAIN.C Initialize the hardware (alarm, motherboard, keyboar
I. Process)
1. by default, each application runs in an independent process, and all components run in the main thread of the process (the main thread is also called the UI thread because it mainly processes the UI)2. You can use the Android: process attribute of component in
The first activity launch process in the Android worldThe first activity launch process in the Android world
It feels good to use Markdown for the first time.How does the Android system go from pressing the enable key to launcher? What are the operations in the middle? Sta
Android is the first activity launch process in the world.The first activity launch process in the Android world
It feels good to use Markdown for the first time.How does the Android system go from pressing the enable key to launcher? What are the operations in the middle
Activitymanager Activitymanager = (activitymanager) context.getsystemservice (ACTIVITY_
SERVICE);
Memoryinfo memoryinfo = new Activitymanager.memoryinfo ();
Activitymanager.getmemoryinfo (Memoryinfo);
LOG.I (TAG, "Memoryinfo.availmem" + Memoryinfo.availmem + "n");
LOG.I (TAG, "memoryinfo.lowmemory" + memoryinfo.lowmemory + "n");
LOG.I (TAG, "memoryinfo.threshold" + Memoryinfo.threshold + "n");
list
Before you see the above code, you have written similar code according to the API instruction
3 from Import Monkeyrunner, Monkeydevice 4 device = monkeyrunner.waitforconnection ()5 Device.shell ("monkey-p Com.qihoo.linker-v")Like the above, but(1) There is a problem is a lot of pages, there will be a jump between the interface, this situation how to do monkey stress test it?Because I am in the process of testing, some randomly generated events should be able to click the Home button or the return key, which may cause the application to quit,
Scroroller for Android (5)-detailed explanation of scroroller call process and View re-painting, androidscrorollerMainActivity is as follows:
package cc.ww;import android.os.Bundle;import android.widget.ImageView;import android.widget.ImageView.ScaleType;import android.widget.RelativeLayout;import android.widget.RelativeLayout.LayoutParams;import android.app.Activity;import android.content.Context;public cl
1、music.apk to Java mediaplayer to libmedia mediaplayer (JNI)
Start is a Java Space Code. In frameworks/base/Media/Java/Android/Media/mediaplayer. Java at the framework layer,
The JNI and Android binder mechanisms are used to call the implementation to the C ++ space, and the mediaplayer library is packaged up for application development and use.
/** Description: * starts or resumes playback. if playback h
Android binder inter-process communication mechanism 1-binder driver, android1-binder
The following content is only an outline. To understand the details, see the source code:
Statement: I am a cainiao. I hope I can get some advice from the experts.
Binder device:/dev/binder
The binder process communication involves four roles:
Client Service ServiceManager Binde
Android 5.0 kernel and source code learning (2)-source code download and system startup process analysis, android5.0
I,AndroidSource code download
The last time I briefly introduced the hierarchical structure of the Android system, I started to figure it out-download the source code and analyze the source code!
So where is the
What happened when I press the power key of the Android device?
What is the Startup Process of Android?
What is Linux kernel?
What is the difference between the Desktop Linux kernel and the Android Linux kernel?
What is a bootstrap loader?
What is Zygote?
What are X86 and ARM linux?
What is init. rc?
Wh
Android uses AIDL for inter-process communication
To enable applications to communicate with each other, Android provides an unique implementation of IPC (Inter Process Communication): AIDL (Android Interface Definition Language, android
In most operating systems, an independent one-to-one executable file (such as an exe file in Windows) exists, which can generate processes, it can also interact with interface icons and applications. But in Android, This is not fixed. It is very important to understand how to combine these scattered parts.
Because Android is flexible and flexible, you need to understand some basic technologies when impleme
, starting to execute the process, and so forth. 2, independent of each other, the memory is isolated using virtual memory, each process has a private address space, as if our program exclusive and use of memory.V. Process life cycle for a program, the process has three states: run, Hang, die. 1, set up a task (create
. The library is then generated and, as long as the specification operates, it can generate a library file that can make the Java layer successfully invoke.
Using NDK to compile the local language can refer to this blog post: http://blog.csdn.net/conowen/article/details/7522667
3. JNI Call Process
As we all know, Android application layer classes are written in Java, these Java classes are compiled into a
Measure calculation process of View in Android
In Android, Veiw goes through three phases in sequence from memory to display on the UI: Traffic calculation-> Layout-> drawing, for details about the overall mechanism of View calculation, layout, and drawing, see the layout and Drawing Mechanism of View in Android. Volu
Binder: a paper clip or paper clip. We often use pins to separate two sheets of paper. In the Android system, binder is the basic framework used to complete inter-process communication IPC, that is to say, different processes are separated so that each process can transmit messages to each other. If you have developed a Java server, you can also think of it as an
People who have done Android development should know that the application will be killed by the system in the absence of system resources! How do I restore a background app after it's been reclaimed by the system? There is a lot of discussion on this issue online. Here is a summary of the online spread of the various solutions to see if these methods are really feasible.1. Increase the priority levelThis approach for normal applications should only re
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