How to build and run a native c application on android emulator

* to start emulator
./emulator -console

* to transfer a file to emulator; this is stored in emulator's
userdata.img file
adb push <file> <dst file>

* to copy a file or a directory recursively to emulator
adb push <source> <destination>

* to copy a file or a directory recursively from emulator
adb pull <source> <destination>

* emulator can run native ARM Linux code.
build your apps using GNU/ARM Linux toolchain and then run in
emulator.

* to get a shell on the emulator
adb shell

* to run a console app on Android emulator
adb shell <Linux command>

* to connect to emulator console for specific commands
telnet localhost 5554/6/8

BUILDING AND RUNNING A NATIVE C APP ON ANDROID EMULATOR

References

Native C Applications for Android
http://benno.id.au/blog/2007/11/13/android-native-apps

Steps
* download and install GNU/ARM Linux tool chain
http://www.codesourcery.com/gnu_toolchains/arm/download.html

* create C/C++ code. see below for sample code.

* build app without dynamic libraries using GNU/ARM Linux toolchain
ex. arm-none-linux-gnueabi-g++.exe -static -o hello HelloAndroid.cpp

* start emulator in Windows by double clicking on $SDK_ROOT/tools/
emulator.exe

* in a Windows Command window, use "adb" to xfer executable to
emulator disk
adb push hello /system/sbin/hello

* make your app executable; do not use chmod ugo+x
adb shell chmod 777 /system/sbin/hello

* run your app in a console on the emulator
adb shell
cd /system/sbin/
hello

EXAMPLE HELLO WORLD CODE
//
// HelloAndroid.cpp
//
//

#include <iostream>
using std::cin;
using std::cout;
using std::endl;

class MyName
{
public:
void getname( void );
void sayhello( void );

private:
char name[ 255 ];

};

void MyName::getname( void )
{
cout << "What is your name? ";
cin >> name;

}

void MyName::sayhello( void )
{
cout << "Welcome " << name << " to the world of Android" << endl;

}

MyName name;

int main( int argc, char *argv[] )
{
name.getname();
name.sayhello();
return 0;

}

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