升级到ADK1.5后，启动模拟器会报错：
Failed to find an AVD compatible with target 'Android 1.5'. Launch aborted.
原来是需要安装Android Virtual Devices (AVDs)
命令如下：
android create avd -n <name> -t <targetID> [-<option> <value>] ...
其中targetID选择有
Available Android targets:id:1 Name: Android 1.1 Type: platform API level: 2 Skins: HVGA (default), HVGA-L, HVGA-P, QVGA-L, QVGA-Pid:2 Name: Android 1.5 Type: platform API level: 3 Skins: HVGA (default), HVGA-L, HVGA-P, QVGA-L, QVGA-Pid:3 Name: Google APIs Type: add-on Vendor: Google Inc. Description: Android + Google APIs Based on Android 1.5 (API level 3) Libraries: * com.google.android.maps (maps.jar) API for Google Maps Skins: HVGA (default), HVGA-L, QVGA-P, HVGA-P, QVGA-L
详情可参考：http://developer.android.com/guide/developing/tools/avd.html
