什麼是 DDMS ?

Using the Dalvik Debug Monitor Service (DDMS) Tool

Android ships with a debugging tool called the Dalvik Debug Monitor Service (DDMS), which provides port-forwarding services, screen capture on the device, thread and heap information on the device, logcat, process, and radio state information, incoming call and SMS spoofing, location data spoofing, and more. This page provides a modest discussion of DDMS features; it is not an exhaustive exploration of all the features and capabilities.

算是一個可以提供目前emulator上的狀況：

1. 有檔案總管的功能。
2. 可列出目前在跑的process。

也可以提供一些環境模擬：

1. 撥電話到emulator
2. 發簡訊
3. 提供GPS位置

以上是目前我有用到的部份，應該還有些沒有提及的強大功能就請參考以下連結。

參考連結：

google原文說明 DDMS