高通 Android 12 framework添加自定义按键上报应用层

Android下添加新的自定义键值和按键处理流程

首先分析下Android下怎么添加新的自定义键值。在Android的原生系统中键值默认情况下是92个，从0-91；一般情况下，这些键值是够用的，但是如果想扩充的话，还是需要添加新的键值的，那么如何将一个新的键值从驱动的设置映射到上层，使应用可以对我们自定义的键值进行相应的处理呢？

在介绍Android怎么添加新的键值以前先介绍下Android下INPUT子系统FLOW的流程，下面就是精简的流程图示意图：

1.添加按键及其映射

1)如果系统有新的按键需要添加，是怎么添加并上报到系统上层去的呢(这里的上层主要指的是Android应用层)，首先要确定的是我们的遥控设备是通过/dev/input目录下那个event调用那个kl文件，这里可以通过如下命令超看cat /proc/bus/input/devices,下面是在Window终端下的打印信息

getevent -p得到以下数据信息

3）命令查看如下通过getevent查看驱动调节的按键值是否上传ok。adb shell getevent 驱动上报O按键键值如下图所示 0259是16进制数对应10进制601 1，0: 是指按下和弹起的动作。

Kernel修改

LINUX/android/kernel/msm-4.19/include/uapi/linux/input-event-codes.h 增加二个宏定义

old mode 100644
new mode 100755
index 8876c98..7afdee6
--- kernel/msm-4.19/include/uapi/linux/input-event-codes.h
+++/kernel/msm-4.19/include/uapi/linux/input-event-codes.h
@@ -337,6 +337,11 @@
#define KEY_MICMUTE 248 /* Mute / unmute the microphone */
+#define KEY_EM_O 601
+//add end
+
/* Code 255 is reserved for special needs of AT keyboard driver */
#define BTN_MISC 0x100

2、在qssi11/LINUX/android/vendor/qcom/proprietary/devicetree-4.19/qcom/kona-pinctrl.dtsi 中增加相关内容[key]: 添加方向键（上、下、左、右）、X/O 键、确认键、主页键、菜单键

diff --git a/LINUX/android/vendor/qcom/proprietary/devicetree-4.19/qcom/kona-pinctrl.dtsi b/LINUX/android/vendor/qcom/proprietary/devicetree-4.19/qcom/kona-pinctrl.dtsi
index a6398b6..9de20ea 100755
--- a/LINUX/android/vendor/qcom/proprietary/devicetree-4.19/qcom/kona-pinctrl.dtsi
+++ b/LINUX/android/vendor/qcom/proprietary/devicetree-4.19/qcom/kona-pinctrl.dtsi
@@ -148,6 +148,31 @@
};
};
*/
+ tlmm_gpio_key {
+ gpio_key_em_active: gpio_key_em_active {
+ mux {
+ pins = "gpio160", "gpio161", "gpio164", "gpio165", "gpio166", "gpio167", "gpio168", "gpio169";
+ function = "gpio";
+ };
+ config {
+ pins = "gpio160", "gpio161", "gpio164", "gpio165", "gpio166", "gpio167", "gpio168", "gpio169";
+ drive-strength = <4>;
+ bias-pull-up;
+ };
+ };
+ gpio_key_em_suspend: gpio_key_em_suspend {
+ mux {
+ pins = "gpio160", "gpio161", "gpio164", "gpio165", "gpio166", "gpio167", "gpio168", "gpio169";
+ function = "gpio";
+ };
+ config {
+ pins = "gpio160", "gpio161", "gpio164", "gpio165", "gpio166", "gpio167", "gpio168", "gpio169";
+ drive-strength = <2>;
+ bias-pull-up;
+ };
+ };
+ };
+
trigout_a: trigout_a {
mux {
:

framework修改

注意：需要注意 gpio 在其他地方的引用，这个会引起冲突。

3、QSSI12/device/qcom/qssi/gpio-keys.kl中增加键盘扫描码对应的键盘码key值X/O,600/601

4、在QSSI12/frameworks/base/data/keyboards/Generic.kl中增加X/O按键如下所示

git diff frameworks/base/data/keyboards/Generic.kl
diff --git a/QSSI12/frameworks/base/data/keyboards/Generic.kl b/QSSI12/frameworks/base/data/keyboards/Generic.kl
index bd0e56a..e4eb2ae 100644
--- a/QSSI12/frameworks/base/data/keyboards/Generic.kl
+++ b/QSSI12/frameworks/base/data/keyboards/Generic.kl
@@ -410,6 +410,9 @@ key 580 APP_SWITCH
key 582 VOICE_ASSIST
# Linux KEY_ASSISTANT
key 583 ASSIST
+# ZM ADD KEY X O
+key 158 KEY_BACK(X键目前BACK键替换）
+key 601 KEY_EM_O

5、在 QSSI12/frameworks/native/include/android/keycodes.h路径中增加内容如下

--- a/QSSI12/frameworks/native/include/android/keycodes.h
+++ b/QSSI12/frameworks/native/include/android/keycodes.h
@@ -776,7 +776,11 @@ enum {
AKEYCODE_THUMBS_DOWN = 287,
/** Used to switch current account that is consuming content.
* May be consumed by system to switch current viewer profile. */
- AKEYCODE_PROFILE_SWITCH = 288
+ AKEYCODE_PROFILE_SWITCH = 288,
+ /** add custom key X */
+ AKEYCODE_KEY_EM_O = 289,
// NOTE: If you add a new keycode here you must also add it to several other files.
// Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.

6、在Android 12目录下 QSSI12/frameworks/native/libs/input/InputEventLabels.cpp 将上面的宏展开就是 {KEY_EM_O， AKEYCODE_KEY_EM_O }

其中KEY_EM_O对应上面定制的字符串

QSSI12/frameworks/native/libs/input/InputEventLabels.cpp

@@ -314,7 +314,10 @@ namespace android {
DEFINE_KEYCODE(REFRESH), \
DEFINE_KEYCODE(THUMBS_UP), \
DEFINE_KEYCODE(THUMBS_DOWN), \
- DEFINE_KEYCODE(PROFILE_SWITCH)
+ DEFINE_KEYCODE(PROFILE_SWITCH), \
+ DEFINE_KEYCODE(KEY_EM_O)
// NOTE: If you add a new axis here you must also add it to several other files.
// Refer to frameworks/base/core/java/android/view/MotionEvent.java for the full list.

7、

高通Android 10/11目录 LINUX/android/frameworks/native/include/input/InputEventLabels.h添加DEFINE_KEYCODE 增加X/O按键映射

static const InputEventLabel KEYCODES[] = {

// NOTE: If you add a new keycode here you must also add it to several other files.

// Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.

DEFINE_KEYCODE(UNKNOWN),

DEFINE_KEYCODE(SOFT_LEFT),

......

DEFINE_KEYCODE(PROFILE_SWITCH),

DEFINE_KEYCODE(KEY_EM_O),

{ nullptr, 0 }

};

8、在QSSI12/frameworks/base/core/java/android/view/KeyEvent.java 增加X/O按键经过如上的步骤就将"123"按键和Android系统中的KEYCODE_KEY_EM_X就对应起来，注意这里的"600键值并不是真正意义上的600键值，他只是linux驱动向上层抛出的键值。

--- a/QSSI12/frameworks/base/core/java/android/view/KeyEvent.java
+++ b/QSSI12/frameworks/base/core/java/android/view/KeyEvent.java
@@ -831,6 +831,9 @@ public class KeyEvent extends InputEvent implements Parcelable {
*/
public static final int KEYCODE_PROFILE_SWITCH = 288;
+ /** add by zm 2023/04/11*/
+ public static final int KEYCODE_KEY_EM_O = 289; /**
* Integer value of the last KEYCODE. Increases as new keycodes are added to KeyEvent.
* @hide
@@ -1977,6 +1980,9 @@ public class KeyEvent extends InputEvent implements Parcelable {
case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_DOWN:
case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_LEFT:
case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_RIGHT:
+ case KeyEvent.KEYCODE_KEY_EM_O:
+
return true;
}

9、对应上层KeyEvent.java里面映射KEYCODE值

--- a/QSSI12/frameworks/base/core/res/res/values/attrs.xml
+++ b/QSSI12/frameworks/base/core/res/res/values/attrs.xml
@@ -1984,6 +1984,9 @@
<enum name="KEYCODE_THUMBS_UP" value="286" />
<enum name="KEYCODE_THUMBS_DOWN" value="287" />
<enum name="KEYCODE_PROFILE_SWITCH" value="288" />
+ <enum name="KEYCODE_KEY_EM_O" value="289" />
</attr>
<!-- ***************************************************************** -->

10、最后在PhoneWindowManager增打开DEBUG_INPUT日志开关如下代码所示

--- a/QSSI12/frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/QSSI12/frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -240,7 +240,7 @@ import java.util.HashSet;
public class PhoneWindowManager implements WindowManagerPolicy {
static final String TAG = "WindowManager";
static final boolean localLOGV = false;
- static final boolean DEBUG_INPUT = false;
+ static final boolean DEBUG_INPUT = true;
static final boolean DEBUG_KEYGUARD = false;
static final boolean DEBUG_SPLASH_SCREEN = false;
static final boolean DEBUG_WAKEUP = false;
@@ -2604,6 +2604,8 @@ public class PhoneWindowManager implements WindowManagerPolicy {
if (DEBUG_INPUT) {
Log.d(TAG, "interceptKeyTi keyCode=" + keyCode + " down=" + down + " repeatCount="
+ repeatCount + " keyguardOn=" + keyguardOn + " canceled=" + canceled);
+ Log.d("ZM", "interceptKeyBeforeDispatching KeyEvent="+event.toString());
+
}
if (mKeyCombinationManager.isKeyConsumed(event)) {
@@ -3448,6 +3450,7 @@ public class PhoneWindowManager implements WindowManagerPolicy {
Log.d(TAG, "interceptKeyTq keycode=" + keyCode
+ " interactive=" + interactive + " keyguardActive=" + keyguardActive
+ " policyFlags=" + Integer.toHexString(policyFlags));
+ Log.d("ZM", "interceptKeyBeforeQueueing KeyEvent="+event.toString());
}

Log.d("ZM", "interceptKeyBeforeQueueing KeyEvent="+event.toString())

Log.d("ZM", "interceptKeyBeforeDispatching KeyEvent="+event.toString())

11、编译之前执行最后执行指令更新下api，再触发编译

make update-api

/frameworks/base/api/current.txt（qssi11路径）QSSI12 frameworks/base/core/api/current.txt

git diff frameworks/base/core/api/current.txt
diff --git a/QSSI12/frameworks/base/core/api/current.txt b/QSSI12/frameworks/base/core/api/current.txt
index 1dd401d..c8ad206 100644
--- a/QSSI12/frameworks/base/core/api/current.txt
+++ b/QSSI12/frameworks/base/core/api/current.txt
@@ -47609,6 +47609,8 @@ package android.view {
field public static final int KEYCODE_K = 39; // 0x27
field public static final int KEYCODE_KANA = 218; // 0xda
field public static final int KEYCODE_KATAKANA_HIRAGANA = 215; // 0xd7
+ field public static final int KEYCODE_KEY_EM_O = 289; // 0x121
field public static final int KEYCODE_L = 40; // 0x28
field public static final int KEYCODE_LANGUAGE_SWITCH = 204; // 0xcc
field public static final int KEYCODE_LAST_CHANNEL = 229; // 0xe5