[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] kenny313:
This is a little example for how to use walkman key as search key so with this u can use any app u want with that kay by just using an app that changes search key behavior

1.Using any file explorer with root go to /system/usr/keylayout/

2. Edit with texteditor file: pm8058-keypad.kl

It should look like this:

# this corresponds to kernel/arch/arm/mach-msm/keypad-coconut.c
#
# defines for values are in frameworks/base/include/ui/KeycodeLabels.h

key 115 VOLUME_UP WAKE
key 114 VOLUME_DOWN WAKE

# KEY_HOME
key 102 HOME WAKE_DROPPED

# CAMERA Related Key
key 212 CAMERA
key 528 FOCUS

# WALKMAN key
key 200 VENDOR_1

At the bottom of the file u can see:

# WALKMAN key
key 200 VENDOR_1

VENDOR_1 is used to tell android which action the key will take

so if we change VENDOR_1 to SEARCH wolkman key will be recognized as a SEARCH key.

So the file after changing it should look like this:

# this corresponds to kernel/arch/arm/mach-msm/keypad-coconut.c
#
# defines for values are in frameworks/base/include/ui/KeycodeLabels.h

key 115 VOLUME_UP WAKE
key 114 VOLUME_DOWN WAKE

# KEY_HOME
key 102 HOME WAKE_DROPPED

# CAMERA Related Key
key 212 CAMERA
key 528 FOCUS

# WALKMAN key
key 200 SEARCH

After editing the file save it and reboot device.

U can map any action to this kay that android will recognize for the rest of actions availdable u can use qwerty.kl as refrance:

key 399 GRAVE
key 2 1
key 3 2
key 4 3
key 5 4
key 6 5
key 7 6
key 8 7
key 9 8
key 10 9
key 11 0
key 158 BACK WAKE_DROPPED
key 230 SOFT_RIGHT WAKE
key 60 SOFT_RIGHT WAKE
key 107 ENDCALL WAKE_DROPPED
key 62 ENDCALL WAKE_DROPPED
key 229 MENU WAKE_DROPPED
key 139 MENU WAKE_DROPPED
key 59 MENU WAKE_DROPPED
key 127 SEARCH WAKE_DROPPED
key 217 SEARCH WAKE_DROPPED
key 228 POUND
key 227 STAR
key 231 CALL WAKE_DROPPED
key 61 CALL WAKE_DROPPED
key 232 DPAD_CENTER WAKE_DROPPED
key 108 DPAD_DOWN WAKE_DROPPED
key 103 DPAD_UP WAKE_DROPPED
key 102 HOME WAKE
key 105 DPAD_LEFT WAKE_DROPPED
key 106 DPAD_RIGHT WAKE_DROPPED
key 115 VOLUME_UP WAKE
key 114 VOLUME_DOWN WAKE
key 116 POWER WAKE
key 212 CAMERA

key 16 Q
key 17 W
key 18 E
key 19 R
key 20 T
key 21 Y
key 22 U
key 23 I
key 24 O
key 25 P
key 26 LEFT_BRACKET
key 27 RIGHT_BRACKET
key 43 BACKSLASH

key 30 A
key 31 S
key 32 D
key 33 F
key 34 G
key 35 H
key 36 J
key 37 K
key 38 L
key 39 SEMICOLON
key 40 APOSTROPHE
key 14 DEL

key 44 Z
key 45 X
key 46 C
key 47 V
key 48 B
key 49 N
key 50 M
key 51 COMMA
key 52 PERIOD
key 53 SLASH
key 28 ENTER

key 56 ALT_LEFT
key 100 ALT_RIGHT
key 42 SHIFT_LEFT
key 54 SHIFT_RIGHT
key 15 TAB
key 57 SPACE
key 150 EXPLORER
key 155 ENVELOPE

key 12 MINUS
key 13 EQUALS
key 215 AT

# On an AT keyboard: ESC, F10
key 1 BACK WAKE_DROPPED
key 68 MENU WAKE_DROPPED

And the most useful with Walkman:

key 200 MEDIA_PLAY_PAUSE WAKE
key 201 MEDIA_PLAY_PAUSE WAKE
key 166 MEDIA_STOP WAKE
key 163 MEDIA_NEXT WAKE
key 165 MEDIA_PREVIOUS WAKE
key 168 MEDIA_REWIND WAKE
key 208 MEDIA_FAST_FORWARD WAKE

When changing action taken by walkman key to one of the above like MEDIA_PLAY_PAUSE its advised to add this WAKE too if u want to use this button when phone is sleeping

So it should look like this:

# WALKMAN key
key 200 MEDIA_PLAY_PAUSE WAKE

Hope this helps:)