Android

10.04 compile the android source code: When compiling the android source code with Ubuntu of a higher version, the most common problem is to install the GCC, G ++, and JDK of the earlier version. These are not provided for installation in the new

We know that ddms can be easily obtained. Android Mobile phone So how does it do it? In fact, there is a device called framebuffer on the Android mobile phone, and image information is written to the mobile phone screen through framebuffer.

  Turn: http://blog.csdn.net/jiajie961/archive/2010/11/10/5999519.aspx Because the Android system uses the Linux kernel, kernel transplantation is not much different from that of the embedded Linux kernel. The process is as follows: (1) port the

Bytes: Ts-> XP = (long) (A2 + (A0 * x) + (A1 * y)/a6); TS-> Yp = (long) (A5 + (A3 * x) + (A4 * y)/a6); // printk ("x = % d, y = % d/N ", (INT) ts-> XP, (INT) ts-> YP );   As mentioned earlier, the University has also learned a very simple way to

The MAKEFILE file Android. mk of the android compilation system is written as follows: (1) In the Android. mk file, you must specify the local_path variable to find the source file. GenerallyAndroid. mk is in the same directory as the source file to

The playback video of Android media files obtains the file metadata, which is mainly used on the mediaplayer service, What mediaplayer client needs to do is to create a playback instance, set the location of a media file, and send a Playback command

Unpack 1. view the file format: file ramdisk. img Ramdisk. IMG: gzip compressed data, from UNIX Ramdisk. IMG is a compressed package. Of course, ramdisk. IMG compression is not required 2. decompress the ramdisk. IMG package: gunzip-S. IMG ramdisk.

Time Measurement In the uboot of MX51 platform, get_timer can be used to obtain accurate timing. The use of get_timer runs through the entire uboot performance adjustment process. Performance Optimization Methods 1. reduce the size of the uboot

Original article: http://blog.csdn.net/zjujoe/article/details/6230575 Android OTA Update 3: generate recovery. img Author: Song Lixin Email: zjujoe@yahoo.comPreface After obtaining the OTA update package, we can use it to upgrade the system. After

The frameworks/base/Media/libmediaplayerservice/directory is the mediaplayer server code that enables media playback, metadata retrieval, and video recording. Mediaplayerservice is mainly implemented in mediaplayerservice. cpp and is the main

The question is a little big. In fact, the Startup Performance adjustment of kernel has nothing to do with Android. I think it should be applicable to all embedded devices using Linux. Time Measurement When it comes to performance adjustment, the

Recently, I was debugging the camera driver on s5pv210. Because I am not familiar with Samsung camera Hal of Android, I wrote a test program to facilitate debugging. Because the camera drivers comply with the v4l2 standard, the test program is

Frameworks/base/libmediaplayerservice/mediaplayerservice. cpp Because MX51 is the working platform, MX51 10.3 code is analyzed. This article mainly analyzes the code of the video play part and ignores the recorder and audio parts. Mediaplayer

On the 1.5 platform, codec is wm9714 (wm9713 can be used for drivers). Since Android is transplanted to ALSA and Android. mid, there has been no sound.   First confirm the hardware connection of ac97, whether the AC-LINK communication is normal,

  I thought it would be troublesome to support my own camera in Android. I didn't expect it to be really simple ~~~ Haha   Because there is a camera driver in wince, there is a list of directly available parameters and registers. The module is flbm26

Reprinted: http://www.2cto.com/kf/201110/106982.html In Android, cmpxchg performs atomic operations, such as auto-addition and auto-subtraction. Cmpxchg exists in 486 and more advanced CPUs. Other types of CPUs, such as arm, do not have this

From: http://blog.sina.com.cn/s/blog_6e15a6010100mafz.html   Android does not support the mouse by default, but the Android system will be applied to many other places, such as tablets and TVs, which often require the mouse support. Support

The bug about gsensor has not been solved recently. Instead, the android gsensor process has been gone through. I haven't written a blog for a long time, so I can't be lazy. I still have to summarize what I learned so that later people don't have to

1. Overview 1.1 Physical Architecture 1.2 Android Architecture 2. cameraservice 3. Hal 4. Overlay 5. Video for Linux 1. Overview This article uses Freescale IMX as an example to analyze the system architecture of the camera.   1.1 Physical

In Android, if we write a JNI program, the following crash log may often appear: 20:47:24 from 10 to 11. 527: INFO/debug (61 ): **************************************** ********10-11 20:47:24. 527: INFO/debug (61): Build fingerprint: