Allow keycode lookup without KEYCODE_ prefix

Currently, KeyEvent.keyCodeFromString(String name) requires the string
to either start with "KEYCODE_", or be directly convertible to an int.
However, the string representation of every keycode starts with
"KEYCODE_", so this requirement is redundant. Relax this requirement to
alllow both of the following usages:
1) keyCodeFromString("KEYCODE_BUTTON_A")
2) keyCodeFromString("BUTTON_A")

Currently, only 1) is supported.

The other usage,
3) keyCodeFromString("29")
is unchanged.

The input is no longer case-sensitive.
Improved the example of usage in the documentation: the input
"1001" suggests that the string must contain binary representation for
usage 3), while in fact it is supposed to be a base 10 number.

Test: atest cts.KeyEventTest#testKeyCodeFromString
Bug: 36069459

Change-Id: I54d7f9d1270748854143cc9d1e8af48c9ec0cd0f

1 files changed, 0 insertions, 3 deletions

diff --git a/cmds/input/src/com/android/commands/input/Input.java b/cmds/input/src/com/android/commands/input/Input.java
index d3ec32076292..74edffb4738d 100644
--- a/cmds/input/src/com/android/commands/input/Input.java
+++ b/cmds/input/src/com/android/commands/input/Input.java
@@ -91,9 +91,6 @@ public class Input {
                     if (args.length > start) {
                         for (int i = start; i < args.length; i++) {
                             int keyCode = KeyEvent.keyCodeFromString(args[i]);
-                            if (keyCode == KeyEvent.KEYCODE_UNKNOWN) {
-                                keyCode = KeyEvent.keyCodeFromString("KEYCODE_" + args[i]);
-                            }
                             sendKeyEvent(inputSource, keyCode, longpress);
                         }
                         return;