android实现触摸屏校准

{ "getScancodeState", "(I)I",

(void*) android_server_KeyInputQueue_getScancodeState },

{ "getScancodeState", "(II)I",

(void*) android_server_KeyInputQueue_getScancodeStateDevice },

{ "getKeycodeState", "(I)I",

(void*) android_server_KeyInputQueue_getKeycodeState },

{ "getKeycodeState", "(II)I",

(void*) android_server_KeyInputQueue_getKeycodeStateDevice },

{ "hasKeys", "([I[Z)Z",

(void*) android_server_KeyInputQueue_hasKeys },

};

Cpp代码

EventHub.cpp

static const char *device_path = "/dev/input";

openPlatformInput(void)

scan_dir(device_path);

open_device(devname);

fd = open(deviceName, O_RDWR);

/*

* 对外接口，getEvent，

* inotify 监控device_path目录， 使用poll机制轮询 inotify 和各个输入设备的可用状态。 解析事件或输入信息，放入各个传出参数中。

*/

bool EventHub::getEvent(int32_t* outDeviceId, int32_t* outType,

int32_t* outScancode, int32_t* outKeycode, uint32_t *outFlags,

int32_t* outValue, nsecs_t* outWhen)

JNI 部分： com_android_server_KeyInputQueue.cpp. 提供接口

static JNINativeMethod gInputMethods[] = {

/* name, signature, funcPtr */

{ "readEvent", "(Landroid/view/RawInputEvent;)Z",

(void*) android_server_KeyInputQueue_readEvent },

{ "getDeviceClasses", "(I)I",

(void*) android_server_KeyInputQueue_getDeviceClasses },

{ "getDeviceName", "(I)Ljava/lang/String;",

(void*) android_server_KeyInputQueue_getDeviceName },

{ "getAbsoluteInfo", "(IILcom/android/server/InputDevice$AbsoluteInfo;)Z",

(void*) android_server_KeyInputQueue_getAbsoluteInfo },

{ "getSwitchState", "(I)I",

(void*) android_server_KeyInputQueue_getSwitchState },