例如：
1. 按下 Return 鍵，Android系統就會返回上一頁。
2. 按下 Home 鍵，Android系統就會回到桌面。
用ADB輸入Command也可以達到相同的效果，Command格式如下：
adb shell intput keyevent KEYCODE
KEYCODE is specified to every key in the android keypad.
Eample:
adb shell intput keyevent 4 # for key return.KEYCODE Table:
00 -> "KEYCODE_UNKNOWN" 01 -> "KEYCODE_MENU" 02 -> "KEYCODE_SOFT_RIGHT" 03 -> "KEYCODE_HOME" 04 -> "KEYCODE_BACK" 05 -> "KEYCODE_CALL" 06 -> "KEYCODE_ENDCALL" 07 -> "KEYCODE_0" 08 -> "KEYCODE_1" 09 -> "KEYCODE_2" 10 -> "KEYCODE_3" 11 -> "KEYCODE_4" 12 -> "KEYCODE_5" 13 -> "KEYCODE_6" 14 -> "KEYCODE_7" 15 -> "KEYCODE_8" 16 -> "KEYCODE_9" 17 -> "KEYCODE_STAR" 18 -> "KEYCODE_POUND" 19 -> "KEYCODE_DPAD_UP" 20 -> "KEYCODE_DPAD_DOWN" 21 -> "KEYCODE_DPAD_LEFT" 22 -> "KEYCODE_DPAD_RIGHT" 23 -> "KEYCODE_DPAD_CENTER" 24 -> "KEYCODE_VOLUME_UP" 25 -> "KEYCODE_VOLUME_DOWN" 26 -> "KEYCODE_POWER" 27 -> "KEYCODE_CAMERA" 28 -> "KEYCODE_CLEAR" 29 -> "KEYCODE_A" 30 -> "KEYCODE_B" 31 -> "KEYCODE_C" 32 -> "KEYCODE_D" 33 -> "KEYCODE_E" 34 -> "KEYCODE_F" 35 -> "KEYCODE_G" 36 -> "KEYCODE_H" 37 -> "KEYCODE_I" 38 -> "KEYCODE_J" 39 -> "KEYCODE_K" 40 -> "KEYCODE_L" 41 -> "KEYCODE_M" 42 -> "KEYCODE_N" 43 -> "KEYCODE_O" 44 -> "KEYCODE_P" 45 -> "KEYCODE_Q" 46 -> "KEYCODE_R" 47 -> "KEYCODE_S" 48 -> "KEYCODE_T" 49 -> "KEYCODE_U" 50 -> "KEYCODE_V" 51 -> "KEYCODE_W" 52 -> "KEYCODE_X" 53 -> "KEYCODE_Y" 54 -> "KEYCODE_Z" 55 -> "KEYCODE_COMMA" 56 -> "KEYCODE_PERIOD" 57 -> "KEYCODE_ALT_LEFT" 58 -> "KEYCODE_ALT_RIGHT" 59 -> "KEYCODE_SHIFT_LEFT" 60 -> "KEYCODE_SHIFT_RIGHT" 61 -> "KEYCODE_TAB" 62 -> "KEYCODE_SPACE" 63 -> "KEYCODE_SYM" 64 -> "KEYCODE_EXPLORER" 65 -> "KEYCODE_ENVELOPE" 66 -> "KEYCODE_ENTER" 67 -> "KEYCODE_DEL" 68 -> "KEYCODE_GRAVE" 69 -> "KEYCODE_MINUS" 70 -> "KEYCODE_EQUALS" 71 -> "KEYCODE_LEFT_BRACKET" 72 -> "KEYCODE_RIGHT_BRACKET" 73 -> "KEYCODE_BACKSLASH" 74 -> "KEYCODE_SEMICOLON" 75 -> "KEYCODE_APOSTROPHE" 76 -> "KEYCODE_SLASH" 77 -> "KEYCODE_AT" 78 -> "KEYCODE_NUM" 79 -> "KEYCODE_HEADSETHOOK" 80 -> "KEYCODE_FOCUS" 81 -> "KEYCODE_PLUS" 82 -> "KEYCODE_MENU" 83 -> "KEYCODE_NOTIFICATION" 84 -> "KEYCODE_SEARCH" 85 -> "TAG_LAST_KEYCODE"
