I use ADT to try to make android apps, and use AVD. I know there is another tool called adb. I know it has been installed, and I want try to use it to send comm
adb
The adb tool can be found in sdk/platform-tools/
If you don't see this directory in your SDK, launch the SDK Manager and install "Android SDK Platform-tools"
Also update your PATH environment variable to include the platform-tools/ directory, so you can execute adb from any location.