莱州免费发布信息的网站平台,口碑好的网页设计服务,网站建设有什么岗位职责,国外购物平台排行榜Android Input子系统-含实例源码 1 Input子系统作用 Android很多外设都是用到输入输出设备#xff0c;比如touchscreen#xff0c;键盘#xff0c;音量键等#xff0c;输入 设备对应Android 框架是Android input子系统#xff0c;像我们定制类比较多的#xff0c;很多 需… Android Input子系统-含实例源码 1 Input子系统作用 Android很多外设都是用到输入输出设备比如touchscreen键盘音量键等输入 设备对应Android 框架是Android input子系统像我们定制类比较多的很多 需要用到输入子系统比如一键打开相机一键唤醒实体按键等。 2 Android input子系统框架 Android Input框架讲解最好的一篇文章 https://blog.csdn.net/mmmccc000/article/details/49756059 Android input框架主要分为三个部分一个是kernel一个是kl文件kl也可 以划分为框架层Framework层主要做监听、过滤、分发的工作Android App部 分主要是接收Input子系统发上来的键值做对应的操作。 3 kernel input框架 Kernel主要是涉及Input设备节点的生成proc文件系统的生成 有一个文章写Kernel框架非常好的我就不再讲了给几个链接 https://blog.csdn.net/u013604527/article/details/53432623/ https://blog.csdn.net/jscese/article/details/42123673 https://blog.csdn.net/xubin341719/article/details/7881735 4 如何在kernel添加一个新的键值 4.1 先在头文件里面添加 找个共用的头文件添加要的key值正常是在include下面的我的代码是在这个位 置 diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 87cf351..45a33ab 100644
--- a/include/uapi/linux/input-event-codes.hb/include/uapi/linux/input-event-codes.h-335,7 335,7 #define KEY_RFKILL 247 /* Key that controls all radios */#define KEY_MICMUTE 248 /* Mute / unmute the microphone */
-
#define KEY_WEIQIFA_TEST 249 /* Code 255 is reserved for special needs of AT keyboard driver */ 4.2 在kernel对应的位置注册和发送键值 注册的位置 /*包含头文件*/#include linux/input.h/*声明input设备*/struct input_dev *button_dev;/*注册input 子设备*/ printk(KERN_ERR xxxx_wake_init\n); if (!(button_dev input_allocate_device())) { printk(KERN_ERR input_dev: not enough memory\n); return -ENOMEM; } button_dev-name xxxx; button_dev-phys xxxx/event0; button_dev-id.bustype BUS_HOST; button_dev-id.vendor 0x0001; button_dev-id.product 0x0002; button_dev-id.version 0x0100; button_dev-evbit[0] BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_SYN); set_bit(KEY_WEIQIFA_TEST,button_dev-keybit); err input_register_device(button_dev); if (err) { printk(KERN_ERR fail to input_register_device\n); input_free_device(button_dev); return err; } printk(KERN_ERR xxxx_wake_init success!!!\n); return 0; 发送键值的位置 input_report_key(button_dev, KEY_WEIQIFA_TEST, 1);input_sync(button_dev);input_report_key(button_dev, KEY_WEIQIFA_TEST, 0); input_sync(button_dev); 4.3 写一个对应这个kl文件 kl文件简单介绍 Kl文件主要是起到了承上启下的作用kernel发过来的键值主要通过kl文件来映 射我们来看看kl文件里面的内容把。左边的是对应kernel上报上来的键值后 面是对应Android Framework上的键值。 22 key 399 GRAVE23 key 2 1 ... 49 key 103 DPAD_UP 50 key 102 HOME 51 key 105 DPAD_LEFT 52 key 106 DPAD_RIGHT 53 key 115 VOLUME_UP kl文件哪里来的呢 我们看项目配置下面有很多kl文件那么是每个input子系统对应一个kl文件 还是所有的项目共用一个kl文件 kl源码位置在 ./frameworks/base/data/keyboards/AVRCP.kl
./frameworks/base/data/keyboards/G
./frameworks/base/data/keyboards/Vendor_0079_Product_0011.kl
./frameworks/base/data/keyboards/Vendor_045e_Product_028e.kl
... 在运行的设备里它的位置如下 rk3399_mid:/ # busybox find / -iname *.kl
/system/usr/keylayout/Generic.kl
/system/usr/keylayout/Vendor_0079_Product_0011.kl
/system/usr/keylayout/qwerty.kl
/system/usr/keylayout/rk29-keypad.kl
/system/usr/keylayout/rtkbt_virtual_hid.kl
...
rk3399_mid:/ # kl是跟input设备如何对应起来的呢 我们可以用这个命令来看看 cat /proc/bus/input/devices kl文件里面的vendor和product分别对应下面的vendor和product rk3399_mid:/ # cat /proc/bus/input/devices
I: Bus0019 Vendor0001 Product0002 Version0100 N: Namexxxx P: Physiflytek/event0 S: Sysfs/devices/virtual/input/input0 U: Uniq H: Handlersevent0 cpufreq B: PROP0 B: EVb B: KEY100000 0 0 0 B: ABS0 添加我们对应的kl文件 文件命名跟你申请的vendor和product对应 上面的input设备对应的kl文件应该是Vendor_0001_Product_0002.kl 里面的内容如下当然如果你没有配置kl文件默认会去Generic.kl找键值映 射如果里面也没有就会去其他kl文件继续找。 # OnLive, Inc. OnLive Wireless Controller
key 249 BUTTON_A 4.4 mtk平台的一个input 子系统驱动例子 上面写的是在rockchip平台做的例子下面给出一个mtk平台的例子 [mkt平台的input子系统例子] (https://blog.csdn.net/weiqifa0/article/details/50387504) 5 Framework input系统介绍 Framework 主要做的事情是监听底层的input然后分发给上层 下面的这个说的框架非常好可以看看我介绍完主要说明如何添加一个新的key 到系统里面 https://blog.csdn.net/wangkaiblog/article/details/12085183 https://blog.csdn.net/mmmccc000/article/details/49756059 6 添加一个新的键值 主要涉及到几个文件位置 下面列出需要修改的文件还有修改的差异点 base/api/current.txt base/api/system-current.txt base/core/java/android/view/KeyEvent.java base/core/res/res/values/attrs.xml /Generic.kl这里也可以根据驱动添加/ base/data/keyboards/Generic.kl base/policy/src/com/android/internal/policy/impl/PhoneFallbackEventHandler.java native/include/android/keycodes.h native/include/input/InputEventLabels.h diff --git a/api/current.txt b/api/current.txt
index 63fa997..a7a4a2b 100644
--- a/api/current.txtb/api/current.txt-41599,6 41599,7 package android.view { field public static final int KEYCODE_ASSIST 219; // 0xdb field public static final int KEYCODE_AT 77; // 0x4d field public static final int KEYCODE_AUDIO 314; // 0x13a field public static final int KEYCODE_WEIQIFA 315; // 0x13B field public static final int KEYCODE_AVR_INPUT 182; // 0xb6 field public static final int KEYCODE_AVR_POWER 181; // 0xb5 field public static final int KEYCODE_B 30; // 0x1e diff --git a/api/system-current.txt b/api/system-current.txt index 19135aa..956ea3e 100644 --- a/api/system-current.txt b/api/system-current.txt -44781,6 44781,7 package android.view { field public static final int KEYCODE_ASSIST 219; // 0xdb field public static final int KEYCODE_AT 77; // 0x4d field public static final int KEYCODE_AUDIO 314; // 0x13a field public static final int KEYCODE_WEIQIFA 315; // 0x13b field public static final int KEYCODE_AVR_INPUT 182; // 0xb6 field public static final int KEYCODE_AVR_POWER 181; // 0xb5 field public static final int KEYCODE_B 30; // 0x1e diff --git a/core/java/android/view/KeyEvent.java b/core/java/android/view/KeyEvent.java index 056f2c9..f2d5235 100755 --- a/core/java/android/view/KeyEvent.java b/core/java/android/view/KeyEvent.java -832,6 832,7 public class KeyEvent extends InputEvent implements Parcelable { public static final int KEYCODE_TV_MEDIA_PAUSE 304; public static final int KEYCODE_WLAN 313; public static final int KEYCODE_AUDIO 314; public static final int KEYCODE_WEIQIFA 315; //$_rbox_$_modify_$ end private static final int LAST_KEYCODE KEYCODE_TV_MEDIA_PAUSE; diff --git a/core/java/com/android/internal/policy/PhoneFallbackEventHandler.java b/core/java/com/android/internal/policy/PhoneFallbackEventHandler.java index e6635a1..366790c 100755 --- a/core/java/com/android/internal/policy/PhoneFallbackEventHandler.java b/core/java/com/android/internal/policy/PhoneFallbackEventHandler.java -141,7 141,12 public class PhoneFallbackEventHandler implements FallbackEventHandler { } case KeyEvent.KEYCODE_AUDIO: { Log.i(TAG, ---KEYCODE_AUDIO DOWN---); } case KeyEvent.KEYCODE_WEIQIFA: { Log.i(TAG,KEYCODE_WEIQIFA); } case KeyEvent.KEYCODE_CAMERA: { if (getKeyguardManager().inKeyguardRestrictedInputMode() || dispatcher null) { diff --git a/core/res/res/values/attrs.xml b/core/res/res/values/attrs.xml index 93743df..094e6c2 100755 --- a/core/res/res/values/attrs.xml b/core/res/res/values/attrs.xml -1861,6 1861,7 i enum nameKEYCODE_MICMUTE value312 / enum nameKEYCODE_WLAN value313 / enum nameKEYCODE_AUDIO value314 / enum nameKEYCODE_WEIQIFA value315 / /attr !-- ***************************************************************** -- diff --git a/include/android/keycodes.h b/include/android/keycodes.h index e3586b2..b657424 100755 --- a/include/android/keycodes.h b/include/android/keycodes.h -777,6 777,7 enum { AKEYCODE_MICMUTE 312, AKEYCODE_WLAN 313, AKEYCODE_AUDIO 314 AKEYCODE_WEIQIFA 315 // 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. diff --git a/include/input/InputEventLabels.h b/include/input/InputEventLabels.h index fabf912..1cd69a2 100755 --- a/include/input/InputEventLabels.h b/include/input/InputEventLabels.h -68,6 68,7 static const InputEventLabel KEYCODES[] { DEFINE_KEYCODE(POWER), DEFINE_KEYCODE(WLAN), DEFINE_KEYCODE(AUDIO), DEFINE_KEYCODE(WEIQIFA), DEFINE_KEYCODE(CAMERA), DEFINE_KEYCODE(CLEAR), DEFINE_KEYCODE(A), 如果出现以下编译错误 out/target/common/obj/PACKAGING/test-api.txt:41961: error 5: Added public field android.view.KeyEvent.KEYCODE_WEIQIFA******************************
You have tried to change the API from what has been previously approved. To make these errors go away, you have two choices: 1) You can add hide javadoc comments to the methods, etc. listed in the errors above. 2) You can update current.txt by executing the following command: make update-api To submit the revised current.txt to the main Android repository, you will need approval. ****************************** 提示你运行make update-api但是要先回退current.txt 和system-current.txt因为这两个文件就是make update-api生成出来的 git checkout api/current.txt
git checkout api/system-current.txt
make update-api 关于make update-api详细看这个https://blog.csdn.net/u010229714/article/details/73840014 如果需要调试可以打开下面的调试文件 --- a/services/core/java/com/android/server/input/InputManagerService.javab/services/core/java/com/android/server/input/InputManagerService.java-125,7 125,7 import libcore.util.Objects; public class InputManagerService extends IInputManager.Stub implements Watchdog.Monitor { static final String TAG InputManager; - static final boolean DEBUG false; static final boolean DEBUG true; private static final String EXCLUDED_DEVICES_PATH etc/excluded-input-devices.xml; --- a/services/core/java/com/android/server/policy/PhoneWindowManager.java b/services/core/java/com/android/server/policy/PhoneWindowManager.java -172,7 172,7 public class PhoneWindowManager implements WindowManagerPolicy { static final String TAG WindowManager; static final boolean DEBUG false; 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_LAYOUT false; static final boolean DEBUG_STARTING_WINDOW false; --- a/services/inputflinger/InputDispatcher.cpp b/services/inputflinger/InputDispatcher.cpp -17,31 17,31 #define LOG_TAG InputDispatcher #define ATRACE_TAG ATRACE_TAG_INPUT -//#define LOG_NDEBUG 0 #define LOG_NDEBUG 1 // Log detailed debug messages about each inbound event notification to the dispatcher. -#define DEBUG_INBOUND_EVENT_DETAILS 0 #define DEBUG_INBOUND_EVENT_DETAILS 1 // Log detailed debug messages about each outbound event processed by the dispatcher. -#define DEBUG_OUTBOUND_EVENT_DETAILS 0 #define DEBUG_OUTBOUND_EVENT_DETAILS 1 // Log debug messages about the dispatch cycle. -#define DEBUG_DISPATCH_CYCLE 0 #define DEBUG_DISPATCH_CYCLE 1 // Log debug messages about registrations. -#define DEBUG_REGISTRATION 0 #define DEBUG_REGISTRATION 1 // Log debug messages about input event injection. -#define DEBUG_INJECTION 0 #define DEBUG_INJECTION 1 // Log debug messages about input focus tracking. -#define DEBUG_FOCUS 0 #define DEBUG_FOCUS 1 // Log debug messages about the app switch latency optimization. -#define DEBUG_APP_SWITCH 0 #define DEBUG_APP_SWITCH 1 // Log debug messages about hover events. -#define DEBUG_HOVER 0 #define DEBUG_HOVER 1 #include InputDispatcher.h diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp index c8dc454..3a622fc 100644 --- a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp -16,10 16,10 #define LOG_TAG InputReader -//#define LOG_NDEBUG 0 #define LOG_NDEBUG 1 // Log debug messages for each raw event received from the EventHub. -#define DEBUG_RAW_EVENTS 0 #define DEBUG_RAW_EVENTS 1 // Log debug messages about touch screen filtering hacks. #define DEBUG_HACKS 0 diff --git a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp index 2dff4e0..977aa22 100644 --- a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp -5,19 5,19 // #define LOG_TAG InputTransport -//#define LOG_NDEBUG 0 #define LOG_NDEBUG 1 // Log debug messages about channel messages (send message, receive message) -#define DEBUG_CHANNEL_MESSAGES 0 #define DEBUG_CHANNEL_MESSAGES 1 // Log debug messages whenever InputChannel objects are created/destroyed -#define DEBUG_CHANNEL_LIFECYCLE 0 #define DEBUG_CHANNEL_LIFECYCLE 1 // Log debug messages about transport actions -#define DEBUG_TRANSPORT_ACTIONS 0 #define DEBUG_TRANSPORT_ACTIONS 1 // Log debug messages about touch event resampling -#define DEBUG_RESAMPLING 0 #define DEBUG_RESAMPLING 1 7 App接收键值 主要参照这个链接来写 https://www.cnblogs.com/zhujiabin/p/5915802.html 例程Android studio源码 链接https://pan.baidu.com/s/1hzhQ-dLSRnAbg2Q8w5qKPw 密码944g Overridepublic boolean dispatchKeyEvent(KeyEvent event) {if(event.getKeyCode() KeyEvent.KEYCODE_ENTER){ /*隐藏软键盘*/ InputMethodManager inputMethodManager (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); if(inputMethodManager.isActive()){ inputMethodManager.hideSoftInputFromWindow(MainActivity.this.getCurrentFocus().getWindowToken(), 0); } edittext.setText(success); webview.loadUrl(URL); return true; } return super.dispatchKeyEvent(event); } 8 命令调试 8.1 测试上报时间 触发Input上报的时间点 rk3399_mid:/ $ logcat -s CAE_LOG|grep -E CAEIvwCb
09-06 14:10:13.502 327 436 D CAE_LOG : CAEIvwCb angle 23 ,beam 0 CMScore 1643 APK接收到键值的时间点 09-06 14:10:13.518 5693-5693/com.hu.audiotest D/audiotest_MainActivity: KeyEvent.KEYCODE_ENTER KeyCode0 09-06 14:10:13.522 5693-5693/com.hu.audiotest D/audiotest_MainActivity: KeyEvent.KEYCODE_ENTER KeyCode0 消耗的时间大概需要16MS但是触发是通过HAL层触发的如果从Kerne触发事间会更短一些 8.2 设备文件调试 我们kernel下面正常用 getevent 来调试 getevent -l cat /proc/bus/input/devices rk3399_mid:/ # getevent -l
add device 1: /dev/input/event2name: rk29-keypad add device 2: /dev/input/event1 name: as9102 Touchscreen add device 3: /dev/input/event0 name: iflytek /dev/input/event0: EV_KEY 00f9 DOWN /dev/input/event0: EV_SYN SYN_REPORT 00000000 /dev/input/event0: EV_KEY 00f9 UP /dev/input/event0: EV_SYN SYN_REPORT 00000000 8.3 adb 上报键值调试 我们正常用adb shell input keyevent xx xx代表键值 可以用input来触发touchscreen也是可以的 有个比较好的文章 https://blog.csdn.net/jlminghui/article/details/39268419 大部分支持的键值如下 0 -- KEYCODE_UNKNOWN
1 -- KEYCODE_MENU 2 -- KEYCODE_SOFT_RIGHT 3 -- KEYCODE_HOME 4 -- KEYCODE_BACK 5 -- KEYCODE_CALL 6 -- KEYCODE_ENDCALL 7 -- KEYCODE_0 8 -- KEYCODE_1 9 -- KEYCODE_2 10 -- KEYCODE_3 11 -- KEYCODE_4 12 -- KEYCODE_5 13 -- KEYCODE_6 14 -- KEYCODE_7 15 -- KEYCODE_8 16 -- KEYCODE_9 17 -- KEYCODE_STAR 18 -- KEYCODE_POUND 19 -- KEYCODE_DPAD_UP 20 -- KEYCODE_DPAD_DOWN 21 -- KEYCODE_DPAD_LEFT 22 -- KEYCODE_DPAD_RIGHT 23 -- KEYCODE_DPAD_CENTER 24 -- KEYCODE_VOLUME_UP 25 -- KEYCODE_VOLUME_DOWN 26 -- KEYCODE_POWER 27 -- KEYCODE_CAMERA 28 -- KEYCODE_CLEAR 29 -- KEYCODE_A 30 -- KEYCODE_B 31 -- KEYCODE_C 32 -- KEYCODE_D 33 -- KEYCODE_E 34 -- KEYCODE_F 35 -- KEYCODE_G 36 -- KEYCODE_H 37 -- KEYCODE_I 38 -- KEYCODE_J 39 -- KEYCODE_K 40 -- KEYCODE_L 41 -- KEYCODE_M 42 -- KEYCODE_N 43 -- KEYCODE_O 44 -- KEYCODE_P 45 -- KEYCODE_Q 46 -- KEYCODE_R 47 -- KEYCODE_S 48 -- KEYCODE_T 49 -- KEYCODE_U 50 -- KEYCODE_V 51 -- KEYCODE_W 52 -- KEYCODE_X 53 -- KEYCODE_Y 54 -- KEYCODE_Z 55 -- KEYCODE_COMMA 56 -- KEYCODE_PERIOD 57 -- KEYCODE_ALT_LEFT 58 -- KEYCODE_ALT_RIGHT 59 -- KEYCODE_SHIFT_LEFT 60 -- KEYCODE_SHIFT_RIGHT 61 -- KEYCODE_TAB 62 -- KEYCODE_SPACE 63 -- KEYCODE_SYM 64 -- KEYCODE_EXPLORER 65 -- KEYCODE_ENVELOPE 66 -- KEYCODE_ENTER 67 -- KEYCODE_DEL 68 -- KEYCODE_GRAVE 69 -- KEYCODE_MINUS 70 -- KEYCODE_EQUALS 71 -- KEYCODE_LEFT_BRACKET 72 -- KEYCODE_RIGHT_BRACKET 73 -- KEYCODE_BACKSLASH 74 -- KEYCODE_SEMICOLON 75 -- KEYCODE_APOSTROPHE 76 -- KEYCODE_SLASH 77 -- KEYCODE_AT 78 -- KEYCODE_NUM 79 -- KEYCODE_HEADSETHOOK 80 -- KEYCODE_FOCUS 81 -- KEYCODE_PLUS
