Set up hardware device (Samsung Nexus S) for developping on Ubuntu 10.04+

The most of the steps are from official android develop link.

The time I tried my first Hello World Android application on emulator is Mar 2010, which is totally one year ago, but now I am still wandering around, even my heart beats always show me how I love android, and how deep I believe it's the trend of the future. However, I didn't make any progress, or make any individual application for the last year. There are so many reasons for this embarrassing result, but one of them, the very important one is I can't connect android phone with my Ubuntu system under debugging mode, even I tried a lot of ways.

Today, I finally solved this problem, here are the steps you should follow:

1. Make your project as "debuggable". In the AndroidManifest.xml file, add android:debuggable="true" to the  element.
2. Turn on "USB Debugging" on your android phone.
3. Setup the system to detect your device.
   
   • Create new file as root: /etc/udev/rules.d/51-android.rules
   • Edit the new file: SUBSYSTEM=="usb", SYSFS{idVendor}=="18d1", MODE="0666"; #Here I tried to use Samsung's idVendor, but it's totally wrong.
   • Don't forget to save it.
   • Change the permission: sudo chmod a+r /etc/udev/rules.d/51-android.rules
4. Here, I tried to restart the server by
   • adb kill-server
     
   • adb start-server
   But it doesn't work.Thus, I just restart my computer, and it works now.
5. Break;
6. Test your connection: adb devices, which is from SDK platform-tools/ directory.

   List of devices attached
   ##########       device

   The sequence of # is the serial number of your device.
7. END;
8. You could also check your USB connection:

   sudo lsusb -v | grep -C5 4e22
   Bus 002 Device 003: ID 18d1:4e22 
   Device Descriptor:
     bLength                18
     bDescriptorType         1
     bcdUSB               2.00
     bDeviceClass            0 (Defined at Interface level)
     bDeviceSubClass         0
     bDeviceProtocol         0
     bMaxPacketSize0        64
     idVendor           0x18d1
     idProduct          0x4e22
     bcdDevice            2.27
     iManufacturer           1 Samsung
     iProduct                2 Nexus S
     iSerial                 3 30308909D7B600EC
     bNumConfigurations      1

You could run your program, even Hello World on your Samsung Nexus S. now.
Hope this will be useful for other developer who is struggling with this problem.