很多开发者表示不知道如何在Android的layout布局文件中输入类似&这样的符号，下面Android123整理了下一些案件事件映射和转义符对照表，比如说?& 在layout.xml中应该\uff06同时，从下表可以看到&和7在键盘上是同一个位置。
??????????? 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