本帖最后由 lxp 于 2017-8-9 16:16 編輯

功能:長按遙控的search鍵后，切換為飛鼠模式。

問題：

1.切換飛鼠模式鼠標沒有顯示出來(要按其他上下左右按鈕才開始顯示)

2.切換回按鍵模式后，鼠標是自動等待一段時間消失，而不是立即消失

從下面這個博客得到啟示

畫鼠標流程

鼠標由PointerController.cpp控制。

文件在framework/base/libs/input/PointerController.cpp鼠標隱藏的方法

void PointerController::fade(Transition transition) {

AutoMutex _l(mLock);

// Remove the inactivity timeout, since we are fading now.

removeInactivityTimeoutLocked();

// Start fading.

if (transition == TRANSITION_IMMEDIATE) {

mLocked.pointerFadeDirection = 0;

mLocked.pointerAlpha = 0.0f;

updatePointerLocked();

} else {

mLocked.pointerFadeDirection = -1;

startAnimationLocked();

}

}復制代碼

本次補丁是framework/base/services/core/java/com/android/server/policy/PhoneWindowManaer.java+? ? Runnable HPHRunable = new Runnable(){

+? ?? ?? ?? ?public void run(){

+? ?? ?? ?? ?? ? mEscPressd = true;

+? ?? ?? ?? ?? ?Log.e(TAG,"linjc:HPHRunable");

+? ?? ?? ?? ?? ?mstate=SystemProperties.get("sys.KeyMouse.mKeyMouseState");

+? ?? ?? ?? ?? ?if(mstate.equals("on"))

+? ?? ?? ?? ?? ?{

+? ?? ?? ?? ?? ?? ?? ???SystemProperties.set("sys.KeyMouse.mKeyMouseState","off");

+? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?Toast.makeText(mContext, "Restore the default button mode", Toast.LENGTH_LONG).show();

+? ?? ?? ?? ?? ?//? ?? ?? ?? ? Toast.makeText(getActivity(), "Restore the default button mode", Toast.LENGTH_LONG).show();

+? ?? ?? ?? ?? ?? ?? ? }

+? ?? ?? ?? ?? ?? ?? ? else

+? ?? ?? ?? ?? ?? ?? ? {

+? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?SystemProperties.set("sys.KeyMouse.mKeyMouseState","on");

+? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?Toast.makeText(mContext, "Into Mouse mode,click this key again out of this mode", Toast.LENGTH_LONG).show();

+? ?? ?? ?? ?? ?//? ?? ?? ?? ? Toast.makeText(getActivity(), "Into Mouse mode,click this key again out of this mode", Toast.LENGTH_LONG).show();

+? ?? ?? ?? ?? ?}

+? ?? ?? ?? ?}

+? ? };

+復制代碼他主要是設置sys.KeyMouse.mKeyMouseState這個全局屬性。

sys.KeyMouse.mKeyMouseState在interceptKeyBeforeDispatching函數里

@Override

public long interceptKeyBeforeDispatching(WindowState win, KeyEvent event, int policyFlags) {

final boolean keyguardOn = keyguardOn();

final int keyCode = event.getKeyCode();

final int repeatCount = event.getRepeatCount();

final int metaState = event.getMetaState();

final int flags = event.getFlags();

final boolean down = event.getAction() == KeyEvent.ACTION_DOWN;

final boolean canceled = event.isCanceled();

if (DEBUG_INPUT) {

Log.d(TAG, "interceptKeyTi keyCode=" + keyCode + " down=" + down + " repeatCount="

+ repeatCount + " keyguardOn=" + keyguardOn + " mHomePressed=" + mHomePressed

+ " canceled=" + canceled);

}

mstate = SystemProperties.get("sys.KeyMouse.mKeyMouseState");

if (mstate.equals("on") && ((keyCode == KeyEvent.KEYCODE_TV_KEYMOUSE_LEFT)

|| (keyCode == KeyEvent.KEYCODE_TV_KEYMOUSE_RIGHT)

|| (keyCode == KeyEvent.KEYCODE_TV_KEYMOUSE_UP)

|| (keyCode == KeyEvent.KEYCODE_TV_KEYMOUSE_DOWN)

|| (keyCode == KeyEvent.KEYCODE_TV_KEYMOUSE_MODE_SWITCH))) {

keydown = down;

mKeyMouseHandler.sendEmptyMessage(keyCode);

//return -1;

}

if (mstate.equals("on") && ((keyCode == KeyEvent.KEYCODE_ENTER)

||(keyCode == KeyEvent.KEYCODE_DPAD_CENTER))) {

return -1;

}

...復制代碼當sys.KeyMouse.mKeyMouseState為on的時候，截取一些keycode交給mKeyMouseHandler處理

public Handler mKeyMouseHandler = new Handler() {

public void handleMessage(Message msg) {

switch(msg.what){

case KeyEvent.KEYCODE_TV_KEYMOUSE_LEFT:

mdeltax = -1.0f;

mdeltay = 0;

break;

case KeyEvent.KEYCODE_TV_KEYMOUSE_RIGHT:

mdeltax = 1.0f;

mdeltay = 0;

break;

case KeyEvent.KEYCODE_TV_KEYMOUSE_UP:

mdeltax = 0;

mdeltay = -1.0f;

break;

case KeyEvent.KEYCODE_TV_KEYMOUSE_DOWN:

mdeltax = 0;

mdeltay = 1.0f;

break;

case KeyEvent.KEYCODE_TV_KEYMOUSE_MODE_SWITCH:

mdeltax = 0;

mdeltay = 0;

break;

default:

break;

}

try {

mWindowManager.dispatchMouse(mdeltax,mdeltay,screenWidth,screenHeight);

} catch (Exception e){

e.printStackTrace();

}

if (keydown) {

mKeyMouseHandler.sendEmptyMessageDelayed(msg.what,30);

}

}

};復制代碼mWindowManager.dispatchMouse(mdeltax,mdeltay,screenWidth,screenHeight);

發現鼠標事件由這個方法處理。

mWindowManager是WindowManagerService

跟進dispatchMouse這個方法

framework/base/services/core/java/com/android/server/wm/WindowManagerService.java

public class WindowManagerService extends IWindowManager.Stub

implements Watchdog.Monitor, WindowManagerPolicy.WindowManagerFuncs {

...

}

...

public void dispatchMouse(float x, float y, int w, int h) {

mInputManager.dispatchMouse(x,y,w,h);

}復制代碼mInputManager是InputManagerService類的實例

framework/base/services/core/java/com/android/server/input/InputManagerService.java

public void dispatchMouse(float x, float y, int w, int h){

nativedispatchMouse(x, y, w, h, mPtr);

}復制代碼

private static native void nativedispatchMouse(float x, float y, int w, int h, long ptr);復制代碼nativedispatchMouse是一個jni方法

查找framework/base/services/core/jni下

發現一個com_android_server_input_InputManagerService.cpp

framework/base/services/core/jni/com_android_server_input_InputManagerService.cpp

static const JNINativeMethod gInputManagerMethods[] = {

/* name, signature, funcPtr */

...復制代碼nativedispatchMouse的原型是android_server_InputManager_nativedispatchMouse

static void android_server_InputManager_nativedispatchMouse(JNIEnv* env,

jclass clazz,jfloat x,jfloat y,jint w,jint h,jlong ptr) {

NativeInputManager* im = reinterpret_cast(ptr);

int mID;

float mx, my;

float screenWidth,screenHeight;

char *mgetID=new char[PROPERTY_VALUE_MAX];

char *mkeyMouseState=new char[PROPERTY_VALUE_MAX];

screenWidth=(float)w;

screenHeight=(float)h;

property_get("sys.ID.mID",mgetID,0);

mID=atoi(mgetID);

mPointerController=im->obtainPointerController(mID);

//start to dispatchMouse

mPointerController->setPresentation(

PointerControllerInterface::PRESENTATION_POINTER);

mPointerController->move(x,y);

mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);

mPointerController->getPosition(&mx, &my);

//if((mx<=0)||((mx>=(screenWidth-10.0f))||(my<=0)||(my>=(screenHeight-10.0f)))

//? ?? ???x=0;y=0;

if (mx == 0) {

strcpy(mkeyMouseState, "left");

} else if (mx>=(screenWidth-5.0f)) {

strcpy(mkeyMouseState, "right");

} else if (my == 0) {

strcpy(mkeyMouseState, "up");

} else if (my >= (screenHeight-5.0f)) {

strcpy(mkeyMouseState, "down");

} else {

strcpy(mkeyMouseState, "Non-boundary");

}

property_set("sys.keymouselimitstate",mkeyMouseState);

}復制代碼終于在這里發現了PointerController的實例了

隱藏鼠標只要模仿dispatchMouse寫一個方法就可以了

static void android_server_InputManager_nativefadeMouse(JNIEnv* env,

jclass clazz,jlong ptr){

NativeInputManager* im = reinterpret_cast(ptr);

int mID;

char *mgetID=new char[PROPERTY_VALUE_MAX];

property_get("sys.ID.mID",mgetID,0);

mID=atoi(mgetID);

mPointerController=im->obtainPointerController(mID);

//start to dispatchMouse

mPointerController->setPresentation(

PointerControllerInterface::PRESENTATION_POINTER);

mPointerController->fade(PointerControllerInterface::TRANSITION_IMMEDIATE);

}復制代碼

gInputManagerMethods[] 數組加上我們新加的方法

{ "nativefadeMouse", "(J)V",

(void*) android_server_InputManager_nativefadeMouse},復制代碼第二個參數括號里面代表的是函數參數類型，括號外的表示返回類型，一定要對應。具體值百度。

這里要注意的是WindowManagerService是繼承了IWindowManager.Stub

要找到IWindowManager.aidl加上對應的方法。

最后，找到文件在

framework/base/core/java/android/view/IWindowManager.aidl

其他中間調用就不寫了。

-----------------------------------

鼠標顯示的方法

比較簡單，看到上面的mKeyMouseHandler。

當sys.KeyMouse.mKeyMouseState設為on的同時，將keydown設為true(為了讓鼠標一直顯示，直到模式切換回去或者有人按鍵)，mKeyMouseHandler.sendEmptyMessage(KeyEvent.KEYCODE_TV_KEYMOUSE_MODE_SWITCH)。

總結

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