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Support mouse pointer on external displays (2/3)

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Limit mouse boundary to one display viewport.
Currently if desktop mode is enable, selects the topmost freeform display,
or find first external display if there is no freeform display.
Return the default display if desktop mode is not enable.

- Add getPointerDisplayId to find the preferred display.
- Limit update viewports from InputReader. Also implements updatePointerDisplay
  to find and associate with the specified display viewport.
- Reload cursor resources if resolution or display changed.

Bug: 113559891
Test: atest inputfliger_tests
Test: ActivityView test app
Change-Id: Ief3410a517be457dfe6f1180342bb1dc88833635
This commit is contained in:
Andrii Kulian
2018-09-14 16:48:08 -07:00
committed by Arthur Hung
parent 9be59f96b3
commit 84cdf9cc3b
8 changed files with 201 additions and 115 deletions
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2
libs/input/Android.bp
View File

@@ -14,7 +14,7 @@
cc_library_shared {
name: "libinputservice",
cpp_std: "c++17",
srcs: [
"PointerController.cpp",
"SpriteController.cpp",

138
libs/input/PointerController.cpp
View File

@@ -89,10 +89,6 @@ PointerController::PointerController(const sp<PointerControllerPolicyInterface>&
mLocked.animationPending = false;
mLocked.displayWidth = -1;
mLocked.displayHeight = -1;
mLocked.displayOrientation = DISPLAY_ORIENTATION_0;
mLocked.presentation = PRESENTATION_POINTER;
mLocked.presentationChanged = false;
@@ -110,15 +106,6 @@ PointerController::PointerController(const sp<PointerControllerPolicyInterface>&
mLocked.lastFrameUpdatedTime = 0;
mLocked.buttonState = 0;
mPolicy->loadPointerIcon(&mLocked.pointerIcon);
loadResources();
if (mLocked.pointerIcon.isValid()) {
mLocked.pointerIconChanged = true;
updatePointerLocked();
}
}
PointerController::~PointerController() {
@@ -144,23 +131,15 @@ bool PointerController::getBounds(float* outMinX, float* outMinY,
bool PointerController::getBoundsLocked(float* outMinX, float* outMinY,
float* outMaxX, float* outMaxY) const {
if (mLocked.displayWidth <= 0 || mLocked.displayHeight <= 0) {
if (!mLocked.viewport.isValid()) {
return false;
}
*outMinX = 0;
*outMinY = 0;
switch (mLocked.displayOrientation) {
case DISPLAY_ORIENTATION_90:
case DISPLAY_ORIENTATION_270:
*outMaxX = mLocked.displayHeight - 1;
*outMaxY = mLocked.displayWidth - 1;
break;
default:
*outMaxX = mLocked.displayWidth - 1;
*outMaxY = mLocked.displayHeight - 1;
break;
}
*outMinX = mLocked.viewport.logicalLeft;
*outMinY = mLocked.viewport.logicalTop;
*outMaxX = mLocked.viewport.logicalRight - 1;
*outMaxY = mLocked.viewport.logicalBottom - 1;
return true;
}
@@ -231,6 +210,12 @@ void PointerController::getPosition(float* outX, float* outY) const {
*outY = mLocked.pointerY;
}
int32_t PointerController::getDisplayId() const {
AutoMutex _l(mLock);
return mLocked.viewport.displayId;
}
void PointerController::fade(Transition transition) {
AutoMutex _l(mLock);
@@ -355,48 +340,57 @@ void PointerController::setInactivityTimeout(InactivityTimeout inactivityTimeout
void PointerController::reloadPointerResources() {
AutoMutex _l(mLock);
loadResources();
if (mLocked.presentation == PRESENTATION_POINTER) {
mLocked.additionalMouseResources.clear();
mLocked.animationResources.clear();
mPolicy->loadPointerIcon(&mLocked.pointerIcon);
mPolicy->loadAdditionalMouseResources(&mLocked.additionalMouseResources,
&mLocked.animationResources);
}
mLocked.presentationChanged = true;
loadResourcesLocked();
updatePointerLocked();
}
void PointerController::setDisplayViewport(int32_t width, int32_t height, int32_t orientation) {
AutoMutex _l(mLock);
/**
* The viewport values for deviceHeight and deviceWidth have already been adjusted for rotation,
* so here we are getting the dimensions in the original, unrotated orientation (orientation 0).
*/
static void getNonRotatedSize(const DisplayViewport& viewport, int32_t& width, int32_t& height) {
if (viewport.orientation == DISPLAY_ORIENTATION_90
|| viewport.orientation == DISPLAY_ORIENTATION_270) {
width = viewport.deviceHeight;
height = viewport.deviceWidth;
} else {
width = viewport.deviceWidth;
height = viewport.deviceHeight;
}
}
// Adjust to use the display's unrotated coordinate frame.
if (orientation == DISPLAY_ORIENTATION_90
|| orientation == DISPLAY_ORIENTATION_270) {
int32_t temp = height;
height = width;
width = temp;
void PointerController::setDisplayViewport(const DisplayViewport& viewport) {
AutoMutex _l(mLock);
if (viewport == mLocked.viewport) {
return;
}
if (mLocked.displayWidth != width || mLocked.displayHeight != height) {
mLocked.displayWidth = width;
mLocked.displayHeight = height;
const DisplayViewport oldViewport = mLocked.viewport;
mLocked.viewport = viewport;
int32_t oldDisplayWidth, oldDisplayHeight;
getNonRotatedSize(oldViewport, oldDisplayWidth, oldDisplayHeight);
int32_t newDisplayWidth, newDisplayHeight;
getNonRotatedSize(viewport, newDisplayWidth, newDisplayHeight);
// Reset cursor position to center if size or display changed.
if (oldViewport.displayId != viewport.displayId
|| oldDisplayWidth != newDisplayWidth
|| oldDisplayHeight != newDisplayHeight) {
float minX, minY, maxX, maxY;
if (getBoundsLocked(&minX, &minY, &maxX, &maxY)) {
mLocked.pointerX = (minX + maxX) * 0.5f;
mLocked.pointerY = (minY + maxY) * 0.5f;
// Reload icon resources for density may be changed.
loadResourcesLocked();
} else {
mLocked.pointerX = 0;
mLocked.pointerY = 0;
}
fadeOutAndReleaseAllSpotsLocked();
}
if (mLocked.displayOrientation != orientation) {
} else if (oldViewport.orientation != viewport.orientation) {
// Apply offsets to convert from the pixel top-left corner position to the pixel center.
// This creates an invariant frame of reference that we can easily rotate when
// taking into account that the pointer may be located at fractional pixel offsets.
@@ -405,37 +399,37 @@ void PointerController::setDisplayViewport(int32_t width, int32_t height, int32_
float temp;
// Undo the previous rotation.
switch (mLocked.displayOrientation) {
switch (oldViewport.orientation) {
case DISPLAY_ORIENTATION_90:
temp = x;
x = mLocked.displayWidth - y;
x = oldViewport.deviceHeight - y;
y = temp;
break;
case DISPLAY_ORIENTATION_180:
x = mLocked.displayWidth - x;
y = mLocked.displayHeight - y;
x = oldViewport.deviceWidth - x;
y = oldViewport.deviceHeight - y;
break;
case DISPLAY_ORIENTATION_270:
temp = x;
x = y;
y = mLocked.displayHeight - temp;
y = oldViewport.deviceWidth - temp;
break;
}
// Perform the new rotation.
switch (orientation) {
switch (viewport.orientation) {
case DISPLAY_ORIENTATION_90:
temp = x;
x = y;
y = mLocked.displayWidth - temp;
y = viewport.deviceHeight - temp;
break;
case DISPLAY_ORIENTATION_180:
x = mLocked.displayWidth - x;
y = mLocked.displayHeight - y;
x = viewport.deviceWidth - x;
y = viewport.deviceHeight - y;
break;
case DISPLAY_ORIENTATION_270:
temp = x;
x = mLocked.displayHeight - y;
x = viewport.deviceWidth - y;
y = temp;
break;
}
@@ -444,7 +438,6 @@ void PointerController::setDisplayViewport(int32_t width, int32_t height, int32_
// and save the results.
mLocked.pointerX = x - 0.5f;
mLocked.pointerY = y - 0.5f;
mLocked.displayOrientation = orientation;
}
updatePointerLocked();
@@ -614,11 +607,16 @@ void PointerController::removeInactivityTimeoutLocked() {
mLooper->removeMessages(mHandler, MSG_INACTIVITY_TIMEOUT);
}
void PointerController::updatePointerLocked() {
void PointerController::updatePointerLocked() REQUIRES(mLock) {
if (!mLocked.viewport.isValid()) {
return;
}
mSpriteController->openTransaction();
mLocked.pointerSprite->setLayer(Sprite::BASE_LAYER_POINTER);
mLocked.pointerSprite->setPosition(mLocked.pointerX, mLocked.pointerY);
mLocked.pointerSprite->setDisplayId(mLocked.viewport.displayId);
if (mLocked.pointerAlpha > 0) {
mLocked.pointerSprite->setAlpha(mLocked.pointerAlpha);
@@ -729,8 +727,18 @@ void PointerController::fadeOutAndReleaseAllSpotsLocked() {
}
}
void PointerController::loadResources() {
void PointerController::loadResourcesLocked() REQUIRES(mLock) {
mPolicy->loadPointerResources(&mResources);
if (mLocked.presentation == PRESENTATION_POINTER) {
mLocked.additionalMouseResources.clear();
mLocked.animationResources.clear();
mPolicy->loadPointerIcon(&mLocked.pointerIcon);
mPolicy->loadAdditionalMouseResources(&mLocked.additionalMouseResources,
&mLocked.animationResources);
}
mLocked.pointerIconChanged = true;
}

12
libs/input/PointerController.h
View File

@@ -23,6 +23,7 @@
#include <vector>
#include <ui/DisplayInfo.h>
#include <input/DisplayViewport.h>
#include <input/Input.h>
#include <PointerControllerInterface.h>
#include <utils/BitSet.h>
@@ -96,6 +97,7 @@ public:
virtual int32_t getButtonState() const;
virtual void setPosition(float x, float y);
virtual void getPosition(float* outX, float* outY) const;
virtual int32_t getDisplayId() const;
virtual void fade(Transition transition);
virtual void unfade(Transition transition);
@@ -106,7 +108,7 @@ public:
void updatePointerIcon(int32_t iconId);
void setCustomPointerIcon(const SpriteIcon& icon);
void setDisplayViewport(int32_t width, int32_t height, int32_t orientation);
void setDisplayViewport(const DisplayViewport& viewport);
void setInactivityTimeout(InactivityTimeout inactivityTimeout);
void reloadPointerResources();
@@ -156,9 +158,7 @@ private:
size_t animationFrameIndex;
nsecs_t lastFrameUpdatedTime;
int32_t displayWidth;
int32_t displayHeight;
int32_t displayOrientation;
DisplayViewport viewport;
InactivityTimeout inactivityTimeout;
@@ -182,7 +182,7 @@ private:
Vector<Spot*> spots;
Vector<sp<Sprite> > recycledSprites;
} mLocked;
} mLocked GUARDED_BY(mLock);
bool getBoundsLocked(float* outMinX, float* outMinY, float* outMaxX, float* outMaxY) const;
void setPositionLocked(float x, float y);
@@ -207,7 +207,7 @@ private:
void fadeOutAndReleaseSpotLocked(Spot* spot);
void fadeOutAndReleaseAllSpotsLocked();
void loadResources();
void loadResourcesLocked();
};
} // namespace android

24
libs/input/SpriteController.cpp
View File

@@ -144,13 +144,16 @@ void SpriteController::doUpdateSprites() {
}
}
// Resize sprites if needed.
// Resize and/or reparent sprites if needed.
SurfaceComposerClient::Transaction t;
bool needApplyTransaction = false;
for (size_t i = 0; i < numSprites; i++) {
SpriteUpdate& update = updates.editItemAt(i);
if (update.state.surfaceControl == nullptr) {
continue;
}
if (update.state.surfaceControl != NULL && update.state.wantSurfaceVisible()) {
if (update.state.wantSurfaceVisible()) {
int32_t desiredWidth = update.state.icon.bitmap.width();
int32_t desiredHeight = update.state.icon.bitmap.height();
if (update.state.surfaceWidth < desiredWidth
@@ -170,6 +173,12 @@ void SpriteController::doUpdateSprites() {
}
}
}
// If surface is a new one, we have to set right layer stack.
if (update.surfaceChanged || update.state.dirty & DIRTY_DISPLAY_ID) {
t.setLayerStack(update.state.surfaceControl, update.state.displayId);
needApplyTransaction = true;
}
}
if (needApplyTransaction) {
t.apply();
@@ -236,7 +245,7 @@ void SpriteController::doUpdateSprites() {
if (update.state.surfaceControl != NULL && (becomingVisible || becomingHidden
|| (wantSurfaceVisibleAndDrawn && (update.state.dirty & (DIRTY_ALPHA
| DIRTY_POSITION | DIRTY_TRANSFORMATION_MATRIX | DIRTY_LAYER
| DIRTY_VISIBILITY | DIRTY_HOTSPOT))))) {
| DIRTY_VISIBILITY | DIRTY_HOTSPOT | DIRTY_DISPLAY_ID))))) {
needApplyTransaction = true;
if (wantSurfaceVisibleAndDrawn
@@ -445,6 +454,15 @@ void SpriteController::SpriteImpl::setTransformationMatrix(
}
}
void SpriteController::SpriteImpl::setDisplayId(int32_t displayId) {
AutoMutex _l(mController->mLock);
if (mLocked.state.displayId != displayId) {
mLocked.state.displayId = displayId;
invalidateLocked(DIRTY_DISPLAY_ID);
}
}
void SpriteController::SpriteImpl::invalidateLocked(uint32_t dirty) {
bool wasDirty = mLocked.state.dirty;
mLocked.state.dirty |= dirty;

8
libs/input/SpriteController.h
View File

@@ -125,6 +125,9 @@ public:
/* Sets the sprite transformation matrix. */
virtual void setTransformationMatrix(const SpriteTransformationMatrix& matrix) = 0;
/* Sets the id of the display where the sprite should be shown. */
virtual void setDisplayId(int32_t displayId) = 0;
};
/*
@@ -170,6 +173,7 @@ private:
DIRTY_LAYER = 1 << 4,
DIRTY_VISIBILITY = 1 << 5,
DIRTY_HOTSPOT = 1 << 6,
DIRTY_DISPLAY_ID = 1 << 7,
};
/* Describes the state of a sprite.
@@ -180,7 +184,7 @@ private:
struct SpriteState {
inline SpriteState() :
dirty(0), visible(false),
positionX(0), positionY(0), layer(0), alpha(1.0f),
positionX(0), positionY(0), layer(0), alpha(1.0f), displayId(ADISPLAY_ID_DEFAULT),
surfaceWidth(0), surfaceHeight(0), surfaceDrawn(false), surfaceVisible(false) {
}
@@ -193,6 +197,7 @@ private:
int32_t layer;
float alpha;
SpriteTransformationMatrix transformationMatrix;
int32_t displayId;
sp<SurfaceControl> surfaceControl;
int32_t surfaceWidth;
@@ -225,6 +230,7 @@ private:
virtual void setLayer(int32_t layer);
virtual void setAlpha(float alpha);
virtual void setTransformationMatrix(const SpriteTransformationMatrix& matrix);
virtual void setDisplayId(int32_t displayId);
inline const SpriteState& getStateLocked() const {
return mLocked.state;

7
services/core/java/com/android/server/input/InputManagerService.java
View File

@@ -1950,6 +1950,11 @@ public class InputManagerService extends IInputManager.Stub
return PointerIcon.getDefaultIcon(mContext);
}
// Native callback.
private int getPointerDisplayId() {
return mWindowManagerCallbacks.getPointerDisplayId();
}
// Native callback.
private String[] getKeyboardLayoutOverlay(InputDeviceIdentifier identifier) {
if (!mSystemReady) {
@@ -2017,6 +2022,8 @@ public class InputManagerService extends IInputManager.Stub
KeyEvent event, int policyFlags);
public int getPointerLayer();
public int getPointerDisplayId();
}
/**

33
services/core/java/com/android/server/wm/InputManagerCallback.java
View File

@@ -1,5 +1,6 @@
package com.android.server.wm;
import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
import static android.view.Display.DEFAULT_DISPLAY;
import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
@@ -9,7 +10,6 @@ import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;
import android.os.Debug;
import android.os.IBinder;
import android.util.Slog;
import android.view.InputApplicationHandle;
import android.view.KeyEvent;
import android.view.WindowManager;
@@ -204,6 +204,37 @@ final class InputManagerCallback implements InputManagerService.WindowManagerCal
+ WindowManagerService.TYPE_LAYER_OFFSET;
}
/** Callback to get pointer display id. */
@Override
public int getPointerDisplayId() {
synchronized (mService.mGlobalLock) {
// If desktop mode is not enabled, show on the default display.
if (!mService.mForceDesktopModeOnExternalDisplays) {
return DEFAULT_DISPLAY;
}
// Look for the topmost freeform display.
int firstExternalDisplayId = DEFAULT_DISPLAY;
for (int i = mService.mRoot.mChildren.size() - 1; i >= 0; --i) {
final DisplayContent displayContent = mService.mRoot.mChildren.get(i);
// Heuristic solution here. Currently when "Freeform windows" developer option is
// enabled we automatically put secondary displays in freeform mode and emulating
// "desktop mode". It also makes sense to show the pointer on the same display.
if (displayContent.getWindowingMode() == WINDOWING_MODE_FREEFORM) {
return displayContent.getDisplayId();
}
if (firstExternalDisplayId == DEFAULT_DISPLAY
&& displayContent.getDisplayId() != DEFAULT_DISPLAY) {
firstExternalDisplayId = displayContent.getDisplayId();
}
}
// Look for the topmost non-default display
return firstExternalDisplayId;
}
}
/** Waits until the built-in input devices have been configured. */
public boolean waitForInputDevicesReady(long timeoutMillis) {
synchronized (mInputDevicesReadyMonitor) {

92
services/core/jni/com_android_server_input_InputManagerService.cpp
View File

@@ -107,6 +107,7 @@ static struct {
jmethodID getLongPressTimeout;
jmethodID getPointerLayer;
jmethodID getPointerIcon;
jmethodID getPointerDisplayId;
jmethodID getKeyboardLayoutOverlay;
jmethodID getDeviceAlias;
jmethodID getTouchCalibrationForInputDevice;
@@ -174,15 +175,6 @@ static void loadSystemIconAsSprite(JNIEnv* env, jobject contextObj, int32_t styl
loadSystemIconAsSpriteWithPointerIcon(env, contextObj, style, &pointerIcon, outSpriteIcon);
}
static void updatePointerControllerFromViewport(
sp<PointerController> controller, const DisplayViewport* const viewport) {
if (controller != nullptr && viewport != nullptr) {
const int32_t width = viewport->logicalRight - viewport->logicalLeft;
const int32_t height = viewport->logicalBottom - viewport->logicalTop;
controller->setDisplayViewport(width, height, viewport->orientation);
}
}
enum {
WM_ACTION_PASS_TO_USER = 1,
};
@@ -242,6 +234,7 @@ public:
jfloatArray matrixArr);
virtual TouchAffineTransformation getTouchAffineTransformation(
const std::string& inputDeviceDescriptor, int32_t surfaceRotation);
virtual void updatePointerDisplay();
/* --- InputDispatcherPolicyInterface implementation --- */
@@ -314,10 +307,11 @@ private:
std::atomic<bool> mInteractive;
void updateInactivityTimeoutLocked(const sp<PointerController>& controller);
void updateInactivityTimeoutLocked();
void handleInterceptActions(jint wmActions, nsecs_t when, uint32_t& policyFlags);
void ensureSpriteControllerLocked();
const DisplayViewport* findDisplayViewportLocked(int32_t displayId);
int32_t getPointerDisplayId();
static bool checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName);
static inline JNIEnv* jniEnv() {
@@ -391,9 +385,10 @@ bool NativeInputManager::checkAndClearExceptionFromCallback(JNIEnv* env, const c
return false;
}
static const DisplayViewport* findInternalViewport(const std::vector<DisplayViewport>& viewports) {
for (const DisplayViewport& v : viewports) {
if (v.type == ViewportType::VIEWPORT_INTERNAL) {
const DisplayViewport* NativeInputManager::findDisplayViewportLocked(int32_t displayId)
REQUIRES(mLock) {
for (const DisplayViewport& v : mLocked.viewports) {
if (v.displayId == displayId) {
return &v;
}
}
@@ -420,20 +415,10 @@ void NativeInputManager::setDisplayViewports(JNIEnv* env, jobjectArray viewportO
}
}
const DisplayViewport* newInternalViewport = findInternalViewport(viewports);
{
{ // acquire lock
AutoMutex _l(mLock);
const DisplayViewport* oldInternalViewport = findInternalViewport(mLocked.viewports);
// Internal viewport has changed if there wasn't one earlier, and there is one now, or,
// if they are different.
const bool internalViewportChanged = (newInternalViewport != nullptr) &&
(oldInternalViewport == nullptr || (*oldInternalViewport != *newInternalViewport));
if (internalViewportChanged) {
sp<PointerController> controller = mLocked.pointerController.promote();
updatePointerControllerFromViewport(controller, newInternalViewport);
}
mLocked.viewports = viewports;
}
} // release lock
mInputManager->getReader()->requestRefreshConfiguration(
InputReaderConfiguration::CHANGE_DISPLAY_INFO);
@@ -556,15 +541,43 @@ sp<PointerControllerInterface> NativeInputManager::obtainPointerController(int32
controller = new PointerController(this, mLooper, mLocked.spriteController);
mLocked.pointerController = controller;
const DisplayViewport* internalViewport = findInternalViewport(mLocked.viewports);
updatePointerControllerFromViewport(controller, internalViewport);
updateInactivityTimeoutLocked(controller);
updateInactivityTimeoutLocked();
}
return controller;
}
int32_t NativeInputManager::getPointerDisplayId() {
JNIEnv* env = jniEnv();
jint pointerDisplayId = env->CallIntMethod(mServiceObj,
gServiceClassInfo.getPointerDisplayId);
if (checkAndClearExceptionFromCallback(env, "getPointerDisplayId")) {
pointerDisplayId = ADISPLAY_ID_DEFAULT;
}
return pointerDisplayId;
}
void NativeInputManager::updatePointerDisplay() {
ATRACE_CALL();
jint pointerDisplayId = getPointerDisplayId();
AutoMutex _l(mLock);
sp<PointerController> controller = mLocked.pointerController.promote();
if (controller != nullptr) {
const DisplayViewport* viewport = findDisplayViewportLocked(pointerDisplayId);
if (viewport == nullptr) {
ALOGW("Can't find pointer display viewport, fallback to default display.");
viewport = findDisplayViewportLocked(ADISPLAY_ID_DEFAULT);
}
if (viewport != nullptr) {
controller->setDisplayViewport(*viewport);
}
}
}
void NativeInputManager::ensureSpriteControllerLocked() REQUIRES(mLock) {
if (mLocked.spriteController == nullptr) {
JNIEnv* env = jniEnv();
@@ -821,16 +834,16 @@ void NativeInputManager::setSystemUiVisibility(int32_t visibility) {
if (mLocked.systemUiVisibility != visibility) {
mLocked.systemUiVisibility = visibility;
sp<PointerController> controller = mLocked.pointerController.promote();
if (controller != nullptr) {
updateInactivityTimeoutLocked(controller);
}
updateInactivityTimeoutLocked();
}
}
void NativeInputManager::updateInactivityTimeoutLocked(const sp<PointerController>& controller)
REQUIRES(mLock) {
void NativeInputManager::updateInactivityTimeoutLocked() REQUIRES(mLock) {
sp<PointerController> controller = mLocked.pointerController.promote();
if (controller == nullptr) {
return;
}
bool lightsOut = mLocked.systemUiVisibility & ASYSTEM_UI_VISIBILITY_STATUS_BAR_HIDDEN;
controller->setInactivityTimeout(lightsOut
? PointerController::INACTIVITY_TIMEOUT_SHORT
@@ -1824,6 +1837,9 @@ int register_android_server_InputManager(JNIEnv* env) {
GET_METHOD_ID(gServiceClassInfo.getPointerIcon, clazz,
"getPointerIcon", "()Landroid/view/PointerIcon;");
GET_METHOD_ID(gServiceClassInfo.getPointerDisplayId, clazz,
"getPointerDisplayId", "()I");
GET_METHOD_ID(gServiceClassInfo.getKeyboardLayoutOverlay, clazz,
"getKeyboardLayoutOverlay",
"(Landroid/hardware/input/InputDeviceIdentifier;)[Ljava/lang/String;");