在android 开发的过程中，用到的模拟器 avd 很可能是没有键盘的，因此就要了解与电脑键盘的对应键，在这里我查了一下资料，是官方文档的，连接地址是
http://developer.android.com/guide/developing/tools/emulator.html
在这里先贴出来分享一下：
Emulator Keyboard Mapping
The table below summarizes the mappings between the emulator keys and and the keys of your keyboard.
Table 2. Emulator keyboard mapping
| Emulated Device Key | Keyboard Key |
|---|---|
| Home | HOME |
| Menu (left softkey) | F2 or Page-up button |
| Star (right softkey) | Shift-F2 or Page Down |
| Back | ESC |
| Call/dial button | F3 |
| Hangup/end call button | F4 |
| Search | F5 |
| Power button | F7 |
| Audio volume up button | KEYPAD_PLUS, Ctrl-5 |
| Audio volume down button | KEYPAD_MINUS, Ctrl-F6 |
| Camera button | Ctrl-KEYPAD_5, Ctrl-F3 |
| Switch to previous layout orientation (for example, portrait, landscape) | KEYPAD_7, Ctrl-F11 |
| Switch to next layout orientation (for example, portrait, landscape) | KEYPAD_9, Ctrl-F12 |
| Toggle cell networking on/off | F8 |
| Toggle code profiling |
F9 (only with -trace startup option) |
| Toggle fullscreen mode | Alt-Enter |
| Toggle trackball mode | F6 |
| Enter trackball mode temporarily (while key is pressed) | Delete |
| DPad left/up/right/down | KEYPAD_4/8/6/2 |
| DPad center click | KEYPAD_5 |
| Onion alpha increase/decrease | KEYPAD_MULTIPLY(*) / KEYPAD_DIVIDE(/) |
Note that, to use keypad keys, you must first disable NumLock on your development computer.