1.Linuxä¸ï¼touchè¯å¥å¦ä½å®ç°
2.Android Touch事件InputManagerService源码解析(二)
3.qtouch组态软件开源吗
4.MotionEventçgetActionãgetActionMaskågetActionIndexçåºå«
5.android onTouchEventåsetOnTouchListenerä¸onTouchçåºå«
6.linux内核hid触摸源码hid-multitouch.c剖析
Linuxä¸ï¼touchè¯å¥å¦ä½å®ç°
ä¸ç¨çå æ ¸ï¼touchæ¯GNU core utilitiesçä¸é¨å
è¿éææºä»£ç
/blog/
Androidä¸çäºä»¶å为æé®äºä»¶å触æ¸äºä»¶ï¼è¿é对触æ¸äºä»¶è¿è¡éè¿°ãTouchäºä»¶æ¯ç±ä¸ä¸ªACTION_DOWNï¼n个
ACTION_MOVEï¼ä¸ä¸ªACTION_UPç»æonClickï¼onLongClickï¼onScrollçäºä»¶ãAndroidä¸çæ§ä»¶é½æ¯ç»§æ¿
Viewè¿ä¸ªåºç±»çï¼èæ§ä»¶å为两ç§ï¼ä¸ç§æ¯ç»§æ¿Viewä¸è½å å«å ¶ä»æ§ä»¶çæ§ä»¶ï¼ä¸ç§æ¯ç»§æ¿ViewGroupå¯ä»¥å å«å ¶ä»æ§ä»¶çæ§ä»¶ï¼æä¸ç§°ä¸ºå®¹å¨æ§
件ï¼æ¯å¦ListViewï¼GridViewï¼LinearLayoutçã
è¿éå 对å 个å½æ°è®²è§£ä¸ã
Ø public boolean dispatchTouchEvent (MotionEventev) è¿ä¸ªæ¹æ³ååTouchEvent
Ø public booleanonInterceptTouchEvent(MotionEvent ev) è¿ä¸ªæ¹æ³æ¦æªTouchEvent
Ø public boolean onTouchEvent(MotionEvent ev) è¿ä¸ªæ¹æ³å¤çTouchEvent
å ¶ä¸viewç±»ä¸ædispatchTouchEventåonTouchEvent两个æ¹æ³ï¼ViewGroup继æ¿Viewï¼èä¸è¿æ°æ·»äºä¸ä¸ª
onInterceptTouchEventæ¹æ³ãActivityä¸ä¹æ onInterceptTouchEventæ¹æ³ï¼ä½æå¦å¤ä¸¤ç§æ¹æ³ãæ们å¯ä»¥
åç°ä¸é¢3个æ¹æ³é½æ¯è¿åbooleanï¼é£å代表ä»ä¹ææå¢ï¼
public boolean dispatchTouchEvent (MotionEvent ev)
Activityä¸è§£éï¼
Called to process touch screen
events.You can override this to intercept all touch screen events before
they aredispatched to the window. Be sure to call this implementation
for touch screenevents that should be handled normally.
Parameters
ev
The touch screen event.
Returns
· boolean Return true if this event was consumed.
å®ä¼è¢«è°ç¨å¤ç触æ¸å±äºä»¶ï¼å¯ä»¥éåè¦çæ¤æ¹æ³æ¥æ¦æªææ触æ¸å±äºä»¶å¨è¿äºäºä»¶ååå°çªå£ä¹åãé常åºè¯¥å¤ç触æ¸å±äºä»¶ï¼ä¸å®è¦è°ç¨è¿ä¸ªå®ç°ãå½è¿
åå¼ä¸ºtrueæ¶ï¼è¡¨ç¤ºè¿ä¸ªäºä»¶å·²ç»è¢«æ¶è´¹äºãä¾å¦å¨TextActivityä¸dispatchTouchEventå¨ACTION_MOVEè¿å
trueï¼è¿è¡ç»æå¦ä¸ï¼
ä¹å°±æ¯å®å¹¶æ²¡ææé£ACTION_MOVEååä¸å»ã
public boolean onInterceptTouchEvent (MotionEvent ev)
Implementthis
method to intercept all touch screen motion events. This allows you
towatch events as they are dispatched to your children, and take
ownership of thecurrent gesture at any point.
Usingthis function takes some care, as it has a fairly complicated interaction with View.onTouchEvent(MotionEvent),and
using it requires implementing that method as well as this one in
thecorrect way. Events will be received in the following order:
1. You will receive the down event here.
2. The
down event will be handled either by a child of this viewgroup, or
given to your own onTouchEvent() method to handle; this means youshould
implement onTouchEvent() to return true, so you will continue to see
therest of the gesture (instead of looking for a parent view to handle
it). Also,by returning true from onTouchEvent(), you will not receive
any followingevents in onInterceptTouchEvent() and all touch processing
must happen inonTouchEvent() like normal.
3. For
as long as you return false from this function, eachfollowing event (up
to and including the final up) will be delivered first hereand then to
the target's onTouchEvent().
4. If
you return true from here, you will not receive any followingevents:
the target view will receive the same event but with the action ACTION_CANCEL, and all further events will be delivered to youronTouchEvent() method and no longer appear here.
Parameters
ev
The motion event being dispatched down the hierarchy.
Returns
· Return
true to steal motionevents from the children and have them dispatched
to this ViewGroup throughonTouchEvent(). The current target will receive
an ACTION_CANCEL event, and nofurther messages will be delivered here.
åºæ¬ææå°±æ¯ï¼
1. ACTION_DOWNé¦å ä¼ä¼ éå°onInterceptTouchEvent()æ¹æ³
2.å¦æ该ViewGroupçonInterceptTouchEvent()å¨æ¥æ¶å°downäºä»¶å¤çå®æä¹åreturn falseï¼é£ä¹åç»çmove, upçäºä»¶å°ç»§ç»ä¼å ä¼ éç»è¯¥ViewGroupï¼ä¹åæådownäºä»¶ä¸æ ·ä¼ éç»æç»çç®æ viewçonTouchEvent()å¤çã
3.å¦æ该ViewGroupçonInterceptTouchEvent()å¨æ¥æ¶å°downäºä»¶å¤çå®æä¹åreturn trueï¼é£ä¹åç»çmove, upçäºä»¶å°ä¸åä¼ éç»onInterceptTouchEvent()ï¼èæ¯ådownäºä»¶ä¸æ ·ä¼ éç»è¯¥ViewGroupçonTouchEvent()å¤çï¼æ³¨æï¼ç®æ viewå°æ¥æ¶ä¸å°ä»»ä½äºä»¶ã
4.å¦ææç»éè¦å¤çäºä»¶çviewçonTouchEvent()è¿åäºfalseï¼é£ä¹è¯¥äºä»¶å°è¢«ä¼ éè³å ¶ä¸ä¸å±æ¬¡çviewçonTouchEvent()å¤çã
5.å¦ææç»éè¦å¤çäºä»¶çviewçonTouchEvent()è¿åäºtrueï¼é£ä¹åç»äºä»¶å°å¯ä»¥ç»§ç»ä¼ éç»è¯¥viewçonTouchEvent()å¤çã
Android touchäºä»¶ä¼ éæºå¶ï¼
æ们å¯ä»¥ççandroidæºä»£ç ï¼
Activity.javaä¸
æä¸ä¸ç®¡onUserInteractionæ¹æ³å 为å®åªæ¯ä¸ä¸ªç©ºæ¹æ³å¦æä½ æ²¡å®ç°çè¯ãgetWindow().superDispatchTouchEvent(ev)ãå ¶ä¸getWindow()è¿åçæ¯PhoneWindowã
PhoneWindow.java:
æ¤å½æ°è°ç¨super.dispatchTouchEvent(event),Activityçrootviewæ¯
PhoneWindow.DecorView,å®ç»§æ¿FrameLayoutãéè¿super.dispatchTouchEventætouchäºä»¶æ´¾
åç»å个Activityçæ¯åviewãåæ¶æå¯ä»¥çå°ï¼å¦æåviewæ¦æªäºäºä»¶ï¼åä¸ä¼æ§è¡onTouchEventå½æ°ã
ViewGroup.javaä¸dispatchTouchEventæ¹æ³ï¼
ç±äºä»£ç è¿é¿è¿éå°±ä¸è´´åºæ¥äºï¼ä½ä¹ç¥éå®è¿åçæ¯
return target.dispatchTouchEvent(ev);
è¿étargetæçæ¯æååçç®æ ï¼å¯ä»¥æ¯å®æ¬èº«ï¼ä¹å¯ä»¥æ¯å®çåViewã
ViewGroup.javaä¸çonInterceptTouchEventæ¹æ³ï¼
é»è®¤æ åµä¸è¿åfalseãå³ä¸æ¦æªtouchäºä»¶ã
View.javaä¸çdispatchTouchEventæ¹æ³
è¿éæ们å¾æ¸ æ¥å¯ä»¥ç¥éå¦æifæ¡ä»¶ä¸æç«ådispatchTouchEventçè¿åå¼æ¯onTouchEventçè¿åå¼
View.javaä¸çonTouchEventæ¹æ³
linux内核hid触摸源码hid-multitouch.c剖析
在Linux内核中,hid-multitouch.c文件负责实现通用的HID触摸驱动。驱动结构定义在mt_driver中,通过module_hdi_driver()函数构建模块。linux 编译源码 赵mt_devices数组定义了设备参数,遵循USB-HID协议,极简店铺源码通过HID_DEVICE宏对各个字段赋值。
mt_probe()函数执行初始化和配置多点触摸设备的操作,根据设备特性设置属性,启动硬件,并创建sysfs属性组。hid_parse()函数调用hid_open_report()解析HID报告,通过遍历数据并调用特定函数解析。红包扫雷网页源码hid_hw_start()函数启动底层HID硬件,而hid_connect()函数则实现连接功能。
对于需要通过USB接入触摸面板且满足HID协议的加仓点源码场景,可以使用hid-multitouch.c。接上两块触摸面板后,内核生成对应的搜图app源码设备节点链接。验证结果显示,内核能够正常解析触摸面板的数据,触摸事件上报亦正常。