Android key event ing table and escape character comparison

Many developers do not know how to input a symbol similar to "&" in the layout file of Android. android123 below lists some case event ing and escape character comparison tables, for example, & in layout. at the same time as/uff06 in XML, we can see from the table below that & and 7 are in the same position on the keyboard.

Keyevent. keycode_unknown,
Keyevent. keycode_soft_left,
Keyevent. keycode_soft_right,
Keyevent. keycode_home,
Keyevent. keycode_back,
Keyevent. keycode_call,
Keyevent. keycode_endcall,
Keyevent. keycode_0 | ('/uff09' <shift_fwch ),//)
Keyevent. keycode_1 | ('/uff01' <shift_fwch ),//!
Keyevent. keycode_2 | ('/uff20' <shift_fwch ),//@
Keyevent. keycode_3 | ('/uff03' <shift_fwch ),//#
Keyevent. keycode_4 | ('/uffe5' <shift_fwch), // $-fullwidth yuan
Keyevent. keycode_5 | ('/uff05' <shift_fwch), // %
Keyevent. keycode_6 | ('/u2026' <shift_fwch), // ^-apostrophe
Keyevent. keycode_7 | ('/uff06' <shift_fwch ),//&
Keyevent. keycode_8 | ('/uff0a' <shift_fwch ),//*
Keyevent. keycode_9 | ('/uff08' <shift_fwch ),//(
Keyevent. keycode_star,
Keyevent. keycode_pound,
Keyevent. keycode_dpad_up,
Keyevent. keycode_dpad_down,
Keyevent. keycode_dpad_left,
Keyevent. keycode_dpad_right,
Keyevent. keycode_dpad_center,
Keyevent. keycode_volume_up,
Keyevent. keycode_volume_down,
Keyevent. keycode_power,
Keyevent. keycode_camera,
Keyevent. keycode_clear,
Keyevent. keycode_a,
Keyevent. keycode_ B | ('/uff3d' <shift_fwch), //]
Keyevent. keycode_c | ('/u00a9' <shift_fwch), // Copyright
Keyevent. keycode_d | ('/u3001' <shift_fwch ),////
Keyevent. keycode_e | ('_' <shift_fwch ),//_
Keyevent. keycode_f | ('/uff5b' <shift_fwch ),//{
Keyevent. keycode_g | ('/uff5d' <shift_fwch ),//}
Keyevent. keycode_h | ('/uff1a' <shift_fwch ),//:
Keyevent. keycode_ I | ('/uff0d' <shift_fwch ),//-
Keyevent. keycode_j | ('/uff1b' <shift_fwch ),//;
Keyevent. keycode_k | ('/u201c' <shift_fwch ),//"
Keyevent. keycode_l | ('/u2019' <shift_fwch ),//'
Keyevent. keycode_m | ('/u300b' <shift_fwch), //>-French quotes
Keyevent. keycode_n | ('/u300a' <shift_fwch), // <-French quotes
Keyevent. keycode_o | ('/uff0b' <shift_fwch), // +
Keyevent. keycode_p | ('/uff1d' <shift_fwch), // =
Keyevent. keycode_q | ('/t' <shift_fwch), // t
Keyevent. keycode_r | ('/u00ae' <shift_fwch), // Trademark
Keyevent. keycode_s | ('/uff5c' <shift_fwch), // |
Keyevent. keycode_t | ('/u20ac' <shift_fwch ),//
Keyevent. keycode_u | ('/u00d7' <shift_fwch), // Multiplier
Keyevent. keycode_v | ('/uff3b' <shift_fwch ),//[
Keyevent. keycode_w | ('/uff40' <shift_fwch ),//'
Keyevent. keycode_x, keyevent. keycode_y | ('/u00f7' <shift_fwch ),
Keyevent. keycode_z,
Keyevent. keycode_comma | ('/uff1f' <shift_fwch ),
Keyevent. keycode_period | ('/uff0f' <shift_fwch ),
Keyevent. keycode_alt_left, keyevent. keycode_alt_right,
Keyevent. keycode_shift_left, keyevent. keycode_shift_right,
Keyevent. keycode_tab, keyevent. keycode_space, keyevent. keycode_sym,
Keyevent. keycode_explorer, keyevent. keycode_envelope,
Keyevent. keycode_enter, keyevent. keycode_del,
Keyevent. keycode_grave, keyevent. keycode_minus,
Keyevent. keycode_equals, keyevent. keycode_left_bracket,
Keyevent. keycode_right_bracket, keyevent. keycode_backslash,
Keyevent. keycode_semicolon, keyevent. keycode_apostrophe,
Keyevent. keycode_slash,
Keyevent. keycode_at | ('/uff5e' <shift_fwch ),
Keyevent. keycode_num, keyevent. keycode_headsethook,
Keyevent. keycode_focus, keyevent. keycode_plus,
Keyevent. keycode_menu, keyevent. keycode_notification,
Keyevent. keycode_search