how to emulate pressing home button in android emulator
Did you try the Home key on your keyboard?
http://developer.android.com/guide/developing/tools/emulator.html
From developer android:
----------------------------------------------------------------------------------| Emulated Device Key | Keyboard Key |----------------------------------------------------------------------------------| Home | HOME (FN + left_arrow on Macbooks)| ----------------------------------------------------------------------------------| 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-F5 |----------------------------------------------------------------------------------| Audio volume down button | KEYPAD_MINUS, Ctrl-F6 |----------------------------------------------------------------------------------| Camera button | Ctrl-KEYPAD_5, Ctrl-F3 |----------------------------------------------------------------------------------| Switch to previous layout orientation | KEYPAD_7, Ctrl-F11 ||(for example,portrait,landscape) | | ----------------------------------------------------------------------------------| Switch to next layout orientation | KEYPAD_9, Ctrl-F12 ||(for example,portrait,landscape) | | ----------------------------------------------------------------------------------|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 | Delete ||(while key is pressed) | |----------------------------------------------------------------------------------| DPad left/up/right/down | KEYPAD_4/8/6/2 |----------------------------------------------------------------------------------| DPad center click | KEYPAD_5 | ----------------------------------------------------------------------------------| Onion alpha increase/decrease |KEYPAD_MULTIPLY(*) / KEYPAD_DIVIDE(/)|----------------------------------------------------------------------------------