android 4 1 system update

byteswritten = (INT) moutput-> write (mmixbuffer, mixbuffersize );Default sampling rate for Android As mentioned above, the android system uses the audiostreamin: samplerate () and audiostreamout: samplerate () methods to obtain the audio recording sampling rate at 44.1 kHz and 8 kHz by default. Step by step, we will find that alsa_default.cpp is fixed:[CPP] Vie

libandroidfw libcutils libhardware libhardware _legacy libnativehelper libsystem_server libutils libui libinput Libskia Libgui libusbhost LibsuspendSystem_server and Android_runtime are a key.System_server can be found in /androidsource/android41/frameworks/base/cmds/system_server , You can look at the Android.mk file and know that the module compiles those files.See System_init.cpp Code methodextern "C" status_t system_init () {Alogi ("entere

Android system development (1) -- GCC compiler compilation and installation process, androidgccIntroduction to GCC compiler The GCC Compiler (gng c Compiler) is a compilation system that complies with the ansi c standard in the GNU project. It can compile programs written in C ++ Object C and other languages. At the sa

　　Recently has been worrying about Android system-level development, a lot of things foggy, or feel that the basic knowledge is not solid, so, thinking repeatedly, or decided to seriously read the "in-depth understanding of Android Volume I, II", recently deep in hand a "deep understanding of Android Volume III" , I ho

= generateLayout (mDecor); // 4. Get the ContentView container, that is, the region where the content is displayed, mTitleView = (TextView) findViewById (com. android. internal. R. id. title); 5. Set if (mTitleView! = Null) {if (getLocalFeatures () (1 We can see that the basic process of setContentView is simply summarized as follows:

There are many ways to extract the Android file system. Today I will explain how to extract the file system from the source code completed by make. In the compiled android source code directory, the file system is stored in the source/out/target/product/generic/directory/

execute the. Dex executable file, and when the Java program is compiled, it needs to be converted to. dex format by the DX tool in the SDK to perform properly on the virtual machine, the Java Virtual machine runs Java bytecode, and the Dalvik virtual machine runs its proprietary file format, Dex (Dalvik exceutable) files.Dalvik virtual machines have the following key features:1. Proprietary DEX file format.2.dex optimization, the structure of the Dex

Android system development (1) -- GCC compiler compilation and Installation ProcessIntroduction to GCC compiler The GCC Compiler (gng c Compiler) is a compilation system that complies with the ansi c standard in the GNU project. It can compile programs written in C ++ Object C and other languages. At the same time, GCC

The notification system on the mobile phone can send important messages to users. A well-designed message reminder mechanism is required for smooth, comfortable, and friendly applications. However, not all notifications are intended to be viewed by users. Otherwise, they will only cause harassment to users. Therefore, use the notifications with caution. During the translation of Android Design, we found tha

indicates that you want your View to be drawn. Therefore, Android will call your onDraw () method (although this cannot guarantee that the callback method will be executed immediately ). In onDraw () of your View component, use your Canvas for all painting work: Use a variety of Canvas. draw... () method, or use your Canvas as a parameter to call the draw () method of other classes. once your onDraw () ends, the