在zedboard板卡中移植android鼠标
来源：互联网 发布：淘宝没有达人淘 编辑：程序博客网 时间：2024/06/06 17:31
本人菜鸟一枚，如有什么错误的地方请指正。
最近拿到一个zedboard板卡，在板卡上移植了一个xilinx提供的android2.3.3系统。使用HDMI显示到屏幕上，但是这样不能与android进行交互，所以想在其源码中添加鼠标支持，通过借鉴mips和x86的android鼠标实现方式，在xilinx提供的源码之上进行改动。下面提供修改的步骤。
参考资料：
1、http://elinux.org/Zedboard_Android
2、http://git.android-x86.org/?p=platform/frameworks/base.git;a=commitdiff;h=08ea1f4dc87c2e87947a9612d4e4e9522fdafd44;hp=1943ee717c30a9042e8d475be61078c98e6e2fcd
3、http://blog.csdn.net/luoshengyang/article/details/6882903 //Android应用程序键盘（Keyboard）消息处理机制分析
4、http://www.hovercool.com/en/Input%E4%BA%8B%E4%BB%B6%E6%B5%81%E7%A8%8B
5、http://blog.sina.com.cn/s/blog_89f592f50101394l.html
移植步骤：
1、添加鼠标图片
在framework/base/core/res/res/drawable-nodpi/中添加一张鼠标png图片 pointer.png
2、添加鼠标设备定义
源代码路径：framework/base/include/ui/EventHub.h
/* 96 * Input device classes. 97 */ 98 enum { 99 /* The input device is a keyboard. */ 100 INPUT_DEVICE_CLASS_KEYBOARD = 0x00000001, 101 102 /* The input device is an alpha-numeric keyboard (not just a dial pad). */ 103 INPUT_DEVICE_CLASS_ALPHAKEY = 0x00000002, 104 105 /* The input device is a touchscreen (either single-touch or multi-touch). */ 106 INPUT_DEVICE_CLASS_TOUCHSCREEN = 0x00000004, 107 108 /* The input device is a trackball. */ 109 INPUT_DEVICE_CLASS_TRACKBALL = 0x00000008, 110 111 /* The input device is a multi-touch touchscreen. */ 112 INPUT_DEVICE_CLASS_TOUCHSCREEN_MT= 0x00000010, 113 114 /* The input device is a directional pad (implies keyboard, has DPAD keys). */ 115 INPUT_DEVICE_CLASS_DPAD = 0x00000020, 116 117 /* The input device is a gamepad (implies keyboard, has BUTTON keys). */ 118 INPUT_DEVICE_CLASS_GAMEPAD = 0x00000040, 119 120 /* The input device has switches. */ 121 INPUT_DEVICE_CLASS_SWITCH = 0x00000080, 122 123 /* The input device is a mouse. */ 124 INPUT_DEVICE_CLASS_MOUSE = 0x00000100,//添加鼠标设备 125 };3、定义鼠标事件接口
源代码路径：framework/base/include/ui/InputReader.h
class MouseInputMapper : public InputMapper { 508 public: 509 MouseInputMapper(InputDevice* device, int32_t associatedDisplayId); 510 511 virtual uint32_t getSources(); 512 virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); 513 virtual void dump(String8& dump); 514 virtual void reset(); 515 virtual void process(const RawEvent* rawEvent); 516 517 virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); 518 519 private: 520 Mutex mLock; 521 522 int32_t mAssociatedDisplayId; 523 524 struct Accumulator { 525 enum { 526 FIELD_BTN_LEFT = 1, 527 FIELD_REL_X = 2, 528 FIELD_REL_Y = 4, 529 FIELD_BTN_RIGHT = 8, 530 FIELD_BTN_MIDDLE = 16, 531 FIELD_BTN_SIDE = 32, 532 FIELD_BTN_EXTRA = 64, 533 FIELD_BTN_FORWARD = 128, 534 FIELD_BTN_BACK = 256, 535 FIELD_REL_WHEEL = 512, 536 }; 537 538 uint32_t fields; 539 540 bool btnLeft; 541 bool btnRight; 542 bool btnMiddle; 543 bool btnSide; 544 bool btnExtra; 545 bool btnForward; 546 bool btnBack; 547 bool btnScrollUp; 548 bool btnScrollDown; 549 int32_t relX; 550 int32_t relY; 551 int32_t absX; 552 int32_t absY; 553 554 inline void clear() { 555 fields = 0; 556 } 557 } mAccumulator; 558 559 struct LockedState { 560 bool down; 561 nsecs_t downTime; 562 } mLocked; 563 564 struct Keyevent { 565 bool down; 566 int keycode; 567 }; 568 569 void initializeLocked(); 570 571 void sync(nsecs_t when); 572 void sendKey(); 573 };4、实现鼠标接口
源代码路径：framework/base/libs/ui/InputReader.cpp
3185 // --- MouseInputMapper ---3186 3187 MouseInputMapper::MouseInputMapper(InputDevice* device, int32_t associatedDisplayId) :3188 InputMapper(device), mAssociatedDisplayId(associatedDisplayId) {3189 initializeLocked();3190 }3191 3192 uint32_t MouseInputMapper::getSources() {3193 return AINPUT_SOURCE_MOUSE;3194 }3195 3196 void MouseInputMapper::populateDeviceInfo(InputDeviceInfo* info) {3197 InputMapper::populateDeviceInfo(info);3198 }3199 3200 void MouseInputMapper::dump(String8& dump) {3201 AutoMutex _l(mLock);3202 dump.append(INDENT2 "Mouse Input Mapper:\n");3203 dump.appendFormat(INDENT3 "AssociatedDisplayId: %d\n", mAssociatedDisplayId);3204 dump.appendFormat(INDENT3 "Down: %s\n", toString(mLocked.down));3205 dump.appendFormat(INDENT3 "DownTime: %lld\n", mLocked.downTime);3206 }3207 3208 void MouseInputMapper::reset() {3209 for (;;) {3210 { // acquire lock3211 AutoMutex _l(mLock);3212 3213 if (! mLocked.down) {3214 initializeLocked();3215 break; // done3216 }3217 } // release lock3218 3219 // Synthesize trackball button up event on reset.3220 nsecs_t when = systemTime(SYSTEM_TIME_MONOTONIC);3221 mAccumulator.fields = Accumulator::FIELD_BTN_LEFT;3222 mAccumulator.btnLeft = false;3223 mAccumulator.btnScrollUp = false;3224 mAccumulator.btnScrollDown = false;3225 sync(when);3226 }3227 3228 InputMapper::reset();3229 }3230 3231 void MouseInputMapper::process(const RawEvent* rawEvent) {3232 switch (rawEvent->type) {3233 case EV_KEY:3234 switch (rawEvent->scanCode) {3235 case BTN_LEFT:3236 mAccumulator.fields |= Accumulator::FIELD_BTN_LEFT;3237 mAccumulator.btnLeft = rawEvent->value;3238 break;3239 case BTN_RIGHT:3240 mAccumulator.fields |= Accumulator::FIELD_BTN_RIGHT;3241 mAccumulator.btnRight = rawEvent->value;3242 break;3243 case BTN_MIDDLE:3244 mAccumulator.fields |= Accumulator::FIELD_BTN_MIDDLE;3245 mAccumulator.btnMiddle = rawEvent->value;3246 break;3247 case BTN_SIDE:3248 mAccumulator.fields |= Accumulator::FIELD_BTN_SIDE;3249 mAccumulator.btnSide = rawEvent->value;3250 break;3251 case BTN_EXTRA:3252 mAccumulator.fields |= Accumulator::FIELD_BTN_EXTRA;3253 mAccumulator.btnExtra = rawEvent->value;3254 break;3255 case BTN_FORWARD:3256 mAccumulator.fields |= Accumulator::FIELD_BTN_FORWARD;3257 mAccumulator.btnForward = rawEvent->value;3258 break;3259 case BTN_BACK:3260 mAccumulator.fields |= Accumulator::FIELD_BTN_BACK;3261 mAccumulator.btnBack = rawEvent->value;3262 break;3263 }3264 sync(rawEvent->when);3265 break;3266 3267 case EV_REL:3268 switch (rawEvent->scanCode) {3269 case REL_X:3270 mAccumulator.fields |= Accumulator::FIELD_REL_X;3271 mAccumulator.relX = rawEvent->value;3272 break;3273 case REL_Y:3274 mAccumulator.fields |= Accumulator::FIELD_REL_Y;3275 mAccumulator.relY = rawEvent->value;3276 break;3277 case REL_WHEEL:3278 mAccumulator.fields |= Accumulator::FIELD_REL_WHEEL;3279 mAccumulator.btnScrollUp = (rawEvent->value == 1);3280 mAccumulator.btnScrollDown = (rawEvent->value == -1);3281 break;3282 }3283 break;3284 3285 case EV_SYN:3286 switch (rawEvent->scanCode) {3287 case SYN_REPORT:3288 sync(rawEvent->when);3289 break;3290 }3291 break;3292 }3293 }3294 3295 int32_t MouseInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {3296 return (scanCode >= BTN_LEFT && scanCode < BTN_JOYSTICK) ?3297 getEventHub()->getScanCodeState(getDeviceId(), scanCode) : AKEY_STATE_UNKNOWN;3298 }3299 3300 void MouseInputMapper::initializeLocked() {3301 mAccumulator.clear();3302 3303 mLocked.down = false;3304 mLocked.downTime = 0;3305 3306 int32_t screenWidth;3307 int32_t screenHeight;3308 if (mAssociatedDisplayId < 0 || ! getPolicy()->getDisplayInfo(mAssociatedDisplayId, &screenWidth, &screenHeight, NULL)) {3309 mAccumulator.absX = 0;3310 mAccumulator.absY = 0;3311 } else {3312 mAccumulator.absX = screenWidth / 2;3313 mAccumulator.absY = screenHeight / 2;3314 }3315 }3316 3317 void MouseInputMapper::sync(nsecs_t when) {3318 uint32_t fields = mAccumulator.fields;3319 if (fields == 0) {3320 return; // no new state changes, so nothing to do3321 }3322 3323 int motionEventAction;3324 PointerCoords pointerCoords;3325 Vector<Keyevent> events;3326 nsecs_t downTime;3327 { // acquire lock3328 AutoMutex _l(mLock);3329 3330 if (fields & Accumulator::FIELD_BTN_LEFT) {3331 if ((mLocked.down = mAccumulator.btnLeft)) {3332 mLocked.downTime = when;3333 motionEventAction = AMOTION_EVENT_ACTION_DOWN;3334 } else {3335 motionEventAction = AMOTION_EVENT_ACTION_UP;3336 }3337 } else {3338 motionEventAction = AMOTION_EVENT_ACTION_MOVE;3339 }3340 3341 Keyevent kevent;3342 if (fields & Accumulator::FIELD_BTN_RIGHT) {3343 kevent.down = mAccumulator.btnRight;3344 kevent.keycode = mLocked.down ? AKEYCODE_HOME : AKEYCODE_BACK;3345 events.push(kevent);3346 }3347 if (fields & Accumulator::FIELD_BTN_MIDDLE) {3348 kevent.down = mAccumulator.btnMiddle;3349 kevent.keycode = mLocked.down ? AKEYCODE_ENTER : AKEYCODE_MENU;3350 events.push(kevent);3351 }3352 if (fields & Accumulator::FIELD_BTN_SIDE) {3353 kevent.down = mAccumulator.btnSide;3354 kevent.keycode = mLocked.down ? AKEYCODE_DPAD_RIGHT : AKEYCODE_HOME;3355 events.push(kevent);3356 }3357 if (fields & Accumulator::FIELD_BTN_EXTRA) {3358 kevent.down = mAccumulator.btnExtra;3359 kevent.keycode = mLocked.down ? AKEYCODE_DPAD_LEFT : AKEYCODE_ENTER;3360 events.push(kevent);3361 }3362 if (fields & Accumulator::FIELD_BTN_FORWARD) {3363 kevent.down = mAccumulator.btnForward;3364 kevent.keycode = AKEYCODE_DPAD_RIGHT;3365 events.push(kevent);3366 }3367 if (fields & Accumulator::FIELD_BTN_BACK) {3368 kevent.down = mAccumulator.btnBack;3369 kevent.keycode = AKEYCODE_DPAD_LEFT;3370 events.push(kevent);3371 }3372 if (fields & Accumulator::FIELD_REL_WHEEL) {3373 if (mAccumulator.btnScrollUp) {3374 kevent.keycode = mLocked.down ? AKEYCODE_MEDIA_NEXT : AKEYCODE_DPAD_UP;3375 kevent.down = true;3376 events.push(kevent);3377 kevent.down = false;3378 events.push(kevent);3379 } else if (mAccumulator.btnScrollDown) {3380 kevent.keycode = mLocked.down ? AKEYCODE_MEDIA_PREVIOUS : AKEYCODE_DPAD_DOWN;3381 kevent.down = true;3382 events.push(kevent);3383 kevent.down = false;3384 events.push(kevent);3385 }3386 }3387 3388 downTime = mLocked.downTime;3389 3390 float x = fields & Accumulator::FIELD_REL_X ? mAccumulator.relX : 0.0f;3391 float y = fields & Accumulator::FIELD_REL_Y ? mAccumulator.relY : 0.0f;3392 3393 int32_t screenWidth;3394 int32_t screenHeight;3395 int32_t orientation;3396 3397 if (mAssociatedDisplayId < 0 || ! getPolicy()->getDisplayInfo(mAssociatedDisplayId, &screenWidth, &screenHeight, &orientation)) {3398 return;3399 }3400 3401 mAccumulator.absX = (mAccumulator.absX + x) > screenWidth ? screenWidth - 1 : ((mAccumulator.absX + x) < 0 ? 0 : mAccumulator.absX + x);3402 mAccumulator.absY = (mAccumulator.absY + y) > screenHeight ? screenHeight - 1 : ((mAccumulator.absY + y) < 0 ? 0 : mAccumulator.absY + y);3403 pointerCoords.x = mAccumulator.absX;3404 pointerCoords.y = mAccumulator.absY;3405 pointerCoords.pressure = mLocked.down ? 1.0f : 0.0f;3406 pointerCoords.size = 0;3407 pointerCoords.touchMajor = 0;3408 pointerCoords.touchMinor = 0;3409 pointerCoords.toolMajor = 0;3410 pointerCoords.toolMinor = 0;3411 pointerCoords.orientation = 0;3412 3413 float temp;3414 switch (orientation) {3415 case InputReaderPolicyInterface::ROTATION_90:3416 temp = x;3417 x = y;3418 y = - temp;3419 temp = screenHeight;3420 screenHeight = screenWidth;3421 screenWidth = temp;3422 break;3423 3424 case InputReaderPolicyInterface::ROTATION_180:3425 x = - x;3426 y = - y;3427 break;3428 3429 case InputReaderPolicyInterface::ROTATION_270:3430 temp = x;3431 x = - y;3432 y = temp;3433 temp = screenHeight;3434 screenHeight = screenWidth;3435 screenWidth = temp;3436 break;3437 }3438 3439 } // release lock3440 3441 int32_t metaState = mContext->getGlobalMetaState();3442 for (size_t i = 0; i < events.size(); ++i) {3443 getDispatcher()->notifyKey(when, getDeviceId(), AINPUT_SOURCE_DPAD, 0,3444 events[i].down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP,3445 AKEY_EVENT_FLAG_FROM_SYSTEM, events[i].keycode, 0,3446 metaState, when);3447 }3448 3449 int32_t pointerId = 0;3450 getDispatcher()->notifyMotion(when, getDeviceId(), AINPUT_SOURCE_MOUSE, 0,3451 motionEventAction, 0, metaState, AMOTION_EVENT_EDGE_FLAG_NONE,3452 1, &pointerId, &pointerCoords, 1, 1, downTime);3453 mAccumulator.clear();3454 }3455 5、在openDevice(const char *deviceName)处增加鼠标类型
源代码路径：framework/base/libs/ui/EventHub.cpp
731 // See if this is a trackball (or mouse). 732 if (test_bit(BTN_MOUSE, key_bitmask)) { 733 uint8_t rel_bitmask[sizeof_bit_array(REL_MAX + 1)]; 734 memset(rel_bitmask, 0, sizeof(rel_bitmask)); 735 LOGV("Getting relative controllers..."); 736 if (ioctl(fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask) >= 0) { 737 if (test_bit(REL_X, rel_bitmask) && test_bit(REL_Y, rel_bitmask)) { 738 device->classes |= (test_bit(BTN_LEFT, key_bitmask) && test_bit(BTN_RIGHT, key_bitmask)) ? 739 INPUT_DEVICE_CLASS_MOUSE : INPUT_DEVICE_CLASS_TRACKBALL; 740 } 741 } 742 } 743 6、修改鼠标事件分发响应
源代码路径：framework/base/libs/ui/InputDispatcher.cpp
718 bool InputDispatcher::dispatchMotionLocked( 719 nsecs_t currentTime, MotionEntry* entry, DropReason* dropReason, nsecs_t* nextWakeupTime) { 720 // Preprocessing. 721 if (! entry->dispatchInProgress) { 722 entry->dispatchInProgress = true; 723 resetTargetsLocked(); 724 725 logOutboundMotionDetailsLocked("dispatchMotion - ", entry); 726 } 727 728 // Clean up if dropping the event. 729 if (*dropReason != DROP_REASON_NOT_DROPPED) { 730 resetTargetsLocked(); 731 setInjectionResultLocked(entry, *dropReason == DROP_REASON_POLICY 732 ? INPUT_EVENT_INJECTION_SUCCEEDED : INPUT_EVENT_INJECTION_FAILED); 733 return true; 734 } 735 736 bool isTouchEvent = ! ((entry->source & AINPUT_SOURCE_TOUCHSCREEN) ^ AINPUT_SOURCE_TOUCHSCREEN); 737 bool isMouseEvent = ! ((entry->source & AINPUT_SOURCE_MOUSE) ^ AINPUT_SOURCE_MOUSE); 738 bool isDownEvent = (entry->action & AMOTION_EVENT_ACTION_MASK) == AMOTION_EVENT_ACTION_DOWN; 739 740 // Identify targets. 741 if (! mCurrentInputTargetsValid) { 742 int32_t injectionResult; 743 if (isTouchEvent || (isMouseEvent && (isDownEvent || mTouchState.down))) { 744 // Touch-like event. (eg. touchscreen or mouse drag-n-drop ) 745 injectionResult = findTouchedWindowTargetsLocked(currentTime, 746 entry, nextWakeupTime); 747 } else { 748 // Non touch event. (eg. trackball or mouse simple move) 749 injectionResult = findFocusedWindowTargetsLocked(currentTime, 750 entry, nextWakeupTime); 751 } 752 if (injectionResult == INPUT_EVENT_INJECTION_PENDING) { 753 return false; 754 } 755 756 setInjectionResultLocked(entry, injectionResult); 757 if (injectionResult != INPUT_EVENT_INJECTION_SUCCEEDED) { 758 return true; 759 } 760 761 addMonitoringTargetsLocked(); 762 commitTargetsLocked(); 763 } 764 765 // Dispatch the motion. 766 dispatchEventToCurrentInputTargetsLocked(currentTime, entry, false); 767 return true; 768 } 769 源代码路径：framework/base/libs/ui/InputReader.cpp
310 InputDevice* InputReader::createDevice(int32_t deviceId, const String8& name, uint32_t classes) { 311 InputDevice* device = new InputDevice(this, deviceId, name); 312 313 const int32_t associatedDisplayId = 0; // FIXME: hardcoded for current single-display devices 314 315 // Switch-like devices. 316 if (classes & INPUT_DEVICE_CLASS_SWITCH) { 317 device->addMapper(new SwitchInputMapper(device)); 318 } 319 320 // Keyboard-like devices. 321 uint32_t keyboardSources = 0; 322 int32_t keyboardType = AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC; 323 if (classes & INPUT_DEVICE_CLASS_KEYBOARD) { 324 keyboardSources |= AINPUT_SOURCE_KEYBOARD; 325 } 326 if (classes & INPUT_DEVICE_CLASS_ALPHAKEY) { 327 keyboardType = AINPUT_KEYBOARD_TYPE_ALPHABETIC; 328 } 329 if (classes & INPUT_DEVICE_CLASS_DPAD) { 330 keyboardSources |= AINPUT_SOURCE_DPAD; 331 } 332 333 if (keyboardSources != 0) { 334 device->addMapper(new KeyboardInputMapper(device, 335 associatedDisplayId, keyboardSources, keyboardType)); 336 } 337 338 // Trackball-like devices. 339 if (classes & INPUT_DEVICE_CLASS_TRACKBALL) { 340 device->addMapper(new TrackballInputMapper(device, associatedDisplayId)); 341 } 342 343 // Touchscreen-like devices. 344 if (classes & INPUT_DEVICE_CLASS_TOUCHSCREEN_MT) { 345 device->addMapper(new MultiTouchInputMapper(device, associatedDisplayId)); 346 } else if (classes & INPUT_DEVICE_CLASS_TOUCHSCREEN) { 347 device->addMapper(new SingleTouchInputMapper(device, associatedDisplayId)); 348 } 349 350 // Mouse-like devices. 351 if (classes & INPUT_DEVICE_CLASS_MOUSE) { 352 device->addMapper(new MouseInputMapper(device, associatedDisplayId)); 353 } 354 355 return device; 356 }8、鼠标绘制及响应
8-1、导入相应的包文件
源代码路径：framework/base/services/com/android/server/WindowsManagerService.java
import com.android.internal.view.BaseInputHandler;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.view.InputHandler;import android.view.InputQueue;
8-2、添加鼠标显示函数
4977 private void showPointer() {4978 if (mPointerSurface == null) {4979 Bitmap pointer = BitmapFactory.decodeResource(mContext.getResources(),4980 com.android.internal.R.drawable.pointer);4981 4982 try {4983 mPointerSurface = new Surface(mFxSession, 0, -1,4984 pointer.getWidth(),4985 pointer.getHeight(),4986 PixelFormat.TRANSPARENT,4987 Surface.FX_SURFACE_NORMAL);4988 4989 Canvas canvas = mPointerSurface.lockCanvas(null);4990 canvas.drawBitmap(pointer, 0, 0, new Paint());4991 mPointerSurface.unlockCanvasAndPost(canvas);4992 } catch (Surface.OutOfResourcesException e) {4993 Log.e(TAG, "Failed to create mouse surface", e);4994 }4995 }4996 4997 mPointerVisible = true;4998 requestAnimationLocked(0);4999 }5000 5001 private void hidePointer() {5002 mPointerVisible = false;5003 requestAnimationLocked(0);5004 }5005 5006 private void startMouseMonitor() {5007 mPointerInputChannel = monitorInput("MousePointer");5008 InputQueue.registerInputChannel(mPointerInputChannel,5009 mPointerInputHandler, mHandler.getLooper().getQueue());5010 }5011 8-3、定义一个inputHandler传递指标值
518 // Mouse pointer handling 519 Handler mHandler = new Handler(); 520 Surface mPointerSurface; 521 boolean mPointerVisible; 522 int mPointerX; 523 int mPointerY; 524 InputChannel mPointerInputChannel; 525 final InputHandler mPointerInputHandler = new BaseInputHandler() { 526 @Override 527 public void handleMotion(MotionEvent event, Runnable finishedCallback) { 528 finishedCallback.run(); 529 530 boolean isMouse = ((event.getSource() & InputDevice.SOURCE_MOUSE) ^ InputDevice.SOURCE_MOUSE) == 0; 531 if (isMouse) { 532 mPointerX = (int) event.getRawX(); 533 mPointerY = (int) event.getRawY(); 534 showPointer(); 535 } else if (mPointerVisible) { 536 hidePointer(); 537 } 538 } 539 };8-4、在performLayoutAndPlaceSurfacesLockedInner(boolean recoveringMemory)函数中绘制鼠标
9589 // Draw the mouse cursor, if necessary9590 if (mPointerSurface != null) {9591 if (mPointerVisible) {9592 WindowState top = (WindowState)mWindows.get(mWindows.size() - 1);9593 mPointerSurface.setPosition(mPointerX, mPointerY);9594 mPointerSurface.setLayer(top.mAnimLayer + 1);9595 mPointerSurface.show();9596 } else {9597 mPointerSurface.hide();9598 }9599 }8-5、在WindowManagerService(Context context, PowerManagerService pm,boolean haveInputMethods) 函数中启动鼠标
672 673 mInputManager.start(); 674 startMouseMonitor(); 675 676 // Add ourself to the Watchdog monitors. 677 Watchdog.getInstance().addMonitor(this);9、使能OTG USB设备
在xilinx via提供的android源码中有一个bug，鼠标或键盘通过OTG链接到zedboard板卡上，鼠标或键盘是不能工作的，如果希望鼠标或键盘工作则需要做一些修改
（1）修改PhoneWindowManager.java文件
源代码路径：framework/base/policy/src/com/android/internal/policy/im[l/PhoneWindowManager.java
修改处大约在1770行
将 if( isScroonOn || isInjected ) 改为if( isScroonOn || isInjected || true )
（2）修改com_android_server_InputManager.cpp文件
源代码路径：framework/base/services/jni/com_android_server_InputManager.cpp
913 void NativeInputManager::interceptGenericBeforeQueueing(nsecs_t when, uint32_t& policyFlags) { 914 #if DEBUG_INPUT_DISPATCHER_POLICY 915 LOGD("interceptGenericBeforeQueueing - when=%lld, policyFlags=0x%x", when, policyFlags); 916 #endif 917 918 // Policy: 919 // - Ignore untrusted events and pass them along. 920 // - No special filtering for injected events required at this time. 921 // - Filter normal events based on screen state. 922 // - For normal events brighten (but do not wake) the screen if currently dim. 923 if ((policyFlags & POLICY_FLAG_TRUSTED) && !(policyFlags & POLICY_FLAG_INJECTED)) { 924 if (isScreenOn()||true) { 925 policyFlags |= POLICY_FLAG_PASS_TO_USER; 926 927 if (!isScreenBright()) { 928 policyFlags |= POLICY_FLAG_BRIGHT_HERE; 929 } 930 } 931 } else { 932 policyFlags |= POLICY_FLAG_PASS_TO_USER; 933 } 934 }至此，zedboard上android移植鼠标步骤完成。
- 在zedboard板卡中移植android鼠标
- 在zedboard上移植opencv
- Nginx在zedboard中的移植
- 【学习笔记】zedboard板卡编译
- ROS在Zedboard上的移植
- U-BOOT 移植到板卡
- imx6板卡移植官方yocto
- zedboard OPENCV移植
- 移植libusb到zedboard
- ZedBoard上移植OpenCV
- projectne10向ZedBoard移植
- Zedboard移植QT
- Zedboard Linux移植笔记
- Zedboard学习（八）：zedboard移植opencv
- zedboard-----------tesseract移植全过程记录
- zedboard--嵌入式linux系统移植
- zedboard--嵌入式linux系统移植
- zedboard上移植OPENCV库
- oracle驱动加载
- 重写clistctl中右键弹出菜单
- android之Fragment（官网资料翻译）
- Android中如何查看内存(上)
- iPhone开发之BSD Socket学习教程
- 在zedboard板卡中移植android鼠标
- 现在就启用 HTTPS，免费的！
- ubuntu系统下更改mysql数据目录的方法
- 谈谈CSS中em与px的差异
- iPhone开发Socket编程使用开源代码之AsyncSocket
- dir
- C-Free 5 发布！
- V5普通参数
- linux 装 tomcat
