Android系統

Environment

• Ubuntu 10.04
• Android source code
• Compiler: JDK
• Utilities: Source Insight, BusyBox

Java programming with JNI

Six steps to call C/C++ from Java code
The process of calling C or C ++ from Java programs consists of six steps. We'll go over each step in depth in the sections that follow, but let's start with a quick look at each one.

1. Write the Java code. We'll start by writing Java classes to perform three tasks: declare the native method we'll be calling; load the shared library containing the native code; and call the native method.
2. Compile the Java code. We must successfully compile the Java class or classes to bytecode before we can use them.
3. Create the C/C++ header file. The C/C++ header file will declare the native function signature that we want to call. This header will then be used with the C/C++ function implementation (see Step 4) to create the shared library (see Step 5).
4. Write the C/C++ code. This step consists of implementing the function in a C or C++ source code file. The C/C++ source file must include the header file we created in Step 3.
5. Create the shared library file. We'll create a shared library file from the C source code file we created in Step 4.
6. Run the Java program. We'll run the code and see if it works. We'll also go over some tips for dealing with the more commonly occurring errors.

View Code

• init
• zygote: app_process, 透過fork和execv來新增
• Audio
• AudioTrack.java
• AudioFlinger.cpp

Blog

• http://blog.csdn.net/u013491946/article/details/62036601
• 深入理解 Android 卷I
• Android Boot Sequence