Android home key以及menu key怎麼起作用的
阿新 • • 發佈：2019-02-18
void InputDispatcher::dispatchOnceInnerLocked(nsecs_t* nextWakeupTime) {
case EventEntry::TYPE_KEY: {
KeyEntry* typedEntry = static_cast<KeyEntry*>(mPendingEvent);
if (isAppSwitchDue) {
if (isAppSwitchKeyEventLocked(typedEntry)) {
resetPendingAppSwitchLocked(true);
isAppSwitchDue = false;
} else if (dropReason == DROP_REASON_NOT_DROPPED) {
dropReason = DROP_REASON_APP_SWITCH;
}
}
if (dropReason == DROP_REASON_NOT_DROPPED
&& isStaleEventLocked(currentTime, typedEntry)) {
dropReason = DROP_REASON_STALE;
}
if (dropReason == DROP_REASON_NOT_DROPPED && mNextUnblockedEvent) {
dropReason = DROP_REASON_BLOCKED;
}
done = dispatchKeyLocked(currentTime, typedEntry, &dropReason, nextWakeupTime);
break;
}
}
到了
bool InputDispatcher::dispatchKeyLocked(nsecs_t currentTime, KeyEntry* entry,
DropReason* dropReason, nsecs_t* nextWakeupTime) {
if (entry->policyFlags & POLICY_FLAG_PASS_TO_USER) {
ALOGE("lisa-dispatchKeyLocked+1");
CommandEntry* commandEntry = postCommandLocked(
& InputDispatcher::doInterceptKeyBeforeDispatchingLockedInterruptible);
if (mFocusedWindowHandle != NULL) {
commandEntry->inputWindowHandle = mFocusedWindowHandle;
}
}
到了
void InputDispatcher::doInterceptKeyBeforeDispatchingLockedInterruptible(
CommandEntry* commandEntry) {
ALOGE("lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1");
KeyEntry* entry = commandEntry->keyEntry;
KeyEvent event;
initializeKeyEvent(&event, entry);
mLock.unlock();
nsecs_t delay = mPolicy->interceptKeyBeforeDispatching(commandEntry->inputWindowHandle,
&event, entry->policyFlags);
mLock.lock();
if (delay < 0) {
entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_SKIP;
} else if (!delay) {
entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_CONTINUE;
} else {
entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_TRY_AGAIN_LATER;
entry->interceptKeyWakeupTime = now() + delay;
}
entry->release();
}
到了
public long interceptKeyBeforeDispatching(WindowState win, KeyEvent event, int policyFlags) {
if (keyCode == KeyEvent.KEYCODE_HOME) {//matt
// If we have released the home key, and didn't do anything else
// while it was pressed, then it is time to go home!
if (!down) {
cancelPreloadRecentApps();
mHomePressed = false;
if (mHomeConsumed) {
mHomeConsumed = false;
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+1" );
return -1;
}
if (canceled) {
Log.i(TAG, "Ignoring HOME; event canceled.");
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+2" );
return -1;
}
// If an incoming call is ringing, HOME is totally disabled.
// (The user is already on the InCallUI at this point,
// and his ONLY options are to answer or reject the call.)
TelecomManager telecomManager = getTelecommService();
if (telecomManager != null && telecomManager.isRinging()) {
Log.i(TAG, "Ignoring HOME; there's a ringing incoming call.");
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+3" );
return -1;
}
// Delay handling home if a double-tap is possible.
if (mDoubleTapOnHomeBehavior != DOUBLE_TAP_HOME_NOTHING) {
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+4" );
mHandler.removeCallbacks(mHomeDoubleTapTimeoutRunnable); // just in case
mHomeDoubleTapPending = true;
mHandler.postDelayed(mHomeDoubleTapTimeoutRunnable,
ViewConfiguration.getDoubleTapTimeout());
return -1;
}
handleShortPressOnHome();
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+5" );
return -1;
}
// If a system window has focus, then it doesn't make sense
// right now to interact with applications.
WindowManager.LayoutParams attrs = win != null ? win.getAttrs() : null;
if (attrs != null) {
final int type = attrs.type;
if (type == WindowManager.LayoutParams.TYPE_KEYGUARD_SCRIM
|| type == WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG
|| (attrs.privateFlags & PRIVATE_FLAG_KEYGUARD) != 0) {
// the "app" is keyguard, so give it the key
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+6" );
return 0;
}
final int typeCount = WINDOW_TYPES_WHERE_HOME_DOESNT_WORK.length;
for (int i=0; i<typeCount; i++) {
if (type == WINDOW_TYPES_WHERE_HOME_DOESNT_WORK[i]) {
// don't do anything, but also don't pass it to the app
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+7" );
return -1;
}
}
}
// Remember that home is pressed and handle special actions.
if (repeatCount == 0) {
mHomePressed = true;
if (mHomeDoubleTapPending) {
mHomeDoubleTapPending = false;
mHandler.removeCallbacks(mHomeDoubleTapTimeoutRunnable);
handleDoubleTapOnHome();
} else if (mLongPressOnHomeBehavior == LONG_PRESS_HOME_RECENT_SYSTEM_UI
|| mDoubleTapOnHomeBehavior == DOUBLE_TAP_HOME_RECENT_SYSTEM_UI) {
preloadRecentApps();
}
} else if ((event.getFlags() & KeyEvent.FLAG_LONG_PRESS) != 0) {
if (!keyguardOn) {
handleLongPressOnHome(event.getDeviceId());
}
}
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+13" );
return -1;
}
}
這段對應的log：
12-11 14:41:19.190 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked
12-11 14:41:19.190 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked+1
12-11 14:41:19.190 2427 3305 E InputDispatcher: lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1
12-11 14:41:19.191 2427 3305 D WindowManager: lisa-interceptKeyBeforeDispatching
12-11 14:41:19.191 2427 3305 D WindowManager: lisa-interceptKeyBeforeDispatching+13
12-11 14:41:19.191 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked
12-11 14:41:19.229 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked
12-11 14:41:19.229 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked+1
12-11 14:41:19.229 2427 3305 E InputDispatcher: lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1
12-11 14:41:19.229 2427 3305 D WindowManager: lisa-interceptKeyBeforeDispatching
12-11 14:41:19.239 2427 3305 D WindowManager: lisa-interceptKeyBeforeDispatching+5
12-11 14:41:19.239 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked
到了
private void handleShortPressOnHome() {
// Turn on the connected TV and switch HDMI input if we're a HDMI playback device.
getHdmiControl().turnOnTv();
// If there's a dream running then use home to escape the dream
// but don't actually go home.
if (mDreamManagerInternal != null && mDreamManagerInternal.isDreaming()) {
mDreamManagerInternal.stopDream(false /*immediate*/);
return;
}
// Go home!
launchHomeFromHotKey();
}
到了
void launchHomeFromHotKey() {
launchHomeFromHotKey(true /* awakenFromDreams */, true /*respectKeyguard*/);
}
到了
void launchHomeFromHotKey(final boolean awakenFromDreams, final boolean respectKeyguard) {
Slog.e(TAG, "lisa-launchHomeFromHotKey");
if (respectKeyguard) {
if (isKeyguardShowingAndNotOccluded()) {
// don't launch home if keyguard showing
return;
}
if (!mHideLockScreen && mKeyguardDelegate.isInputRestricted()) {
// when in keyguard restricted mode, must first verify unlock
// before launching home
mKeyguardDelegate.verifyUnlock(new OnKeyguardExitResult() {
@Override
public void onKeyguardExitResult(boolean success) {
if (success) {
try {
ActivityManagerNative.getDefault().stopAppSwitches();
} catch (RemoteException e) {
}
Slog.e(TAG, "lisa-launchHomeFromHotKey 1");
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_HOME_KEY);
startDockOrHome(true /*fromHomeKey*/, awakenFromDreams);
}
}
});
return;
}
}
// no keyguard stuff to worry about, just launch home!
try {
ActivityManagerNative.getDefault().stopAppSwitches();
} catch (RemoteException e) {
}
if (mRecentsVisible) {
// Hide Recents and notify it to launch Home
if (awakenFromDreams) {
awakenDreams();
}
Slog.e(TAG, "lisa-launchHomeFromHotKey 2");
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_HOME_KEY);
hideRecentApps(false, true);
} else {
// Otherwise, just launch Home
Slog.e(TAG, "lisa-launchHomeFromHotKey 3");
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_HOME_KEY);
startDockOrHome(true /*fromHomeKey*/, awakenFromDreams);
}
}
到了
void startDockOrHome(boolean fromHomeKey, boolean awakenFromDreams) {
if (awakenFromDreams) {
awakenDreams();
}
Intent dock = createHomeDockIntent();
if (dock != null) {
try {
if (fromHomeKey) {
dock.putExtra(WindowManagerPolicy.EXTRA_FROM_HOME_KEY, fromHomeKey);
}
startActivityAsUser(dock, UserHandle.CURRENT);
return;
} catch (ActivityNotFoundException e) {
}
}
Slog.e(TAG, "lisa-startDockOrHome");
Intent intent;
if (fromHomeKey) {
intent = new Intent(mHomeIntent);
intent.putExtra(WindowManagerPolicy.EXTRA_FROM_HOME_KEY, fromHomeKey);
} else {
intent = mHomeIntent;
}
startActivityAsUser(intent, UserHandle.CURRENT);最後start activity 返回home 介面
}
log如下
12-11 15:12:41.630 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked
12-11 15:12:41.630 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked+1
12-11 15:12:41.630 2373 3227 E InputDispatcher: lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1
12-11 15:12:41.631 2373 3227 D WindowManager: lisa-interceptKeyBeforeDispatching
12-11 15:12:41.631 2373 3227 D WindowManager: lisa-interceptKeyBeforeDispatching+13
12-11 15:12:41.631 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked
12-11 15:12:41.685 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked
12-11 15:12:41.685 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked+1
12-11 15:12:41.686 2373 3227 E InputDispatcher: lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1
12-11 15:12:41.686 2373 3227 D WindowManager: lisa-interceptKeyBeforeDispatching
12-11 15:12:41.690 2373 3227 E WindowManager: lisa-launchHomeFromHotKey
12-11 15:12:41.690 2373 3227 E WindowManager: lisa-launchHomeFromHotKey 3
12-11 15:12:41.696 2373 3227 E WindowManager: lisa-startDockOrHome
12-11 15:12:41.704 2373 3227 D WindowManager: lisa-interceptKeyBeforeDispatching+5
case EventEntry::TYPE_KEY: {
KeyEntry* typedEntry = static_cast<KeyEntry*>(mPendingEvent);
if (isAppSwitchDue) {
if (isAppSwitchKeyEventLocked(typedEntry)) {
resetPendingAppSwitchLocked(true);
isAppSwitchDue = false;
} else if (dropReason == DROP_REASON_NOT_DROPPED) {
dropReason = DROP_REASON_APP_SWITCH;
}
}
if (dropReason == DROP_REASON_NOT_DROPPED
&& isStaleEventLocked(currentTime, typedEntry)) {
dropReason = DROP_REASON_STALE;
}
if (dropReason == DROP_REASON_NOT_DROPPED && mNextUnblockedEvent) {
dropReason = DROP_REASON_BLOCKED;
}
done = dispatchKeyLocked(currentTime, typedEntry, &dropReason, nextWakeupTime);
break;
}
}
到了
bool InputDispatcher::dispatchKeyLocked(nsecs_t currentTime, KeyEntry* entry,
DropReason* dropReason, nsecs_t* nextWakeupTime) {
if (entry->policyFlags & POLICY_FLAG_PASS_TO_USER) {
ALOGE("lisa-dispatchKeyLocked+1");
CommandEntry* commandEntry = postCommandLocked(
& InputDispatcher::doInterceptKeyBeforeDispatchingLockedInterruptible);
if (mFocusedWindowHandle != NULL) {
commandEntry->inputWindowHandle = mFocusedWindowHandle;
}
}
到了
void InputDispatcher::doInterceptKeyBeforeDispatchingLockedInterruptible(
CommandEntry* commandEntry) {
ALOGE("lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1");
KeyEntry* entry = commandEntry->keyEntry;
KeyEvent event;
initializeKeyEvent(&event, entry);
mLock.unlock();
nsecs_t delay = mPolicy->interceptKeyBeforeDispatching(commandEntry->inputWindowHandle,
&event, entry->policyFlags);
mLock.lock();
if (delay < 0) {
entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_SKIP;
} else if (!delay) {
entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_CONTINUE;
} else {
entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_TRY_AGAIN_LATER;
entry->interceptKeyWakeupTime = now() + delay;
}
entry->release();
}
到了
public long interceptKeyBeforeDispatching(WindowState win, KeyEvent event, int policyFlags) {
if (keyCode == KeyEvent.KEYCODE_HOME) {//matt
// If we have released the home key, and didn't do anything else
// while it was pressed, then it is time to go home!
if (!down) {
cancelPreloadRecentApps();
mHomePressed = false;
if (mHomeConsumed) {
mHomeConsumed = false;
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+1" );
return -1;
}
if (canceled) {
Log.i(TAG, "Ignoring HOME; event canceled.");
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+2" );
return -1;
}
// If an incoming call is ringing, HOME is totally disabled.
// (The user is already on the InCallUI at this point,
// and his ONLY options are to answer or reject the call.)
TelecomManager telecomManager = getTelecommService();
if (telecomManager != null && telecomManager.isRinging()) {
Log.i(TAG, "Ignoring HOME; there's a ringing incoming call.");
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+3" );
return -1;
}
// Delay handling home if a double-tap is possible.
if (mDoubleTapOnHomeBehavior != DOUBLE_TAP_HOME_NOTHING) {
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+4" );
mHandler.removeCallbacks(mHomeDoubleTapTimeoutRunnable); // just in case
mHomeDoubleTapPending = true;
mHandler.postDelayed(mHomeDoubleTapTimeoutRunnable,
ViewConfiguration.getDoubleTapTimeout());
return -1;
}
handleShortPressOnHome();
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+5" );
return -1;
}
// If a system window has focus, then it doesn't make sense
// right now to interact with applications.
WindowManager.LayoutParams attrs = win != null ? win.getAttrs() : null;
if (attrs != null) {
final int type = attrs.type;
if (type == WindowManager.LayoutParams.TYPE_KEYGUARD_SCRIM
|| type == WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG
|| (attrs.privateFlags & PRIVATE_FLAG_KEYGUARD) != 0) {
// the "app" is keyguard, so give it the key
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+6" );
return 0;
}
final int typeCount = WINDOW_TYPES_WHERE_HOME_DOESNT_WORK.length;
for (int i=0; i<typeCount; i++) {
if (type == WINDOW_TYPES_WHERE_HOME_DOESNT_WORK[i]) {
// don't do anything, but also don't pass it to the app
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+7" );
return -1;
}
}
}
// Remember that home is pressed and handle special actions.
if (repeatCount == 0) {
mHomePressed = true;
if (mHomeDoubleTapPending) {
mHomeDoubleTapPending = false;
mHandler.removeCallbacks(mHomeDoubleTapTimeoutRunnable);
handleDoubleTapOnHome();
} else if (mLongPressOnHomeBehavior == LONG_PRESS_HOME_RECENT_SYSTEM_UI
|| mDoubleTapOnHomeBehavior == DOUBLE_TAP_HOME_RECENT_SYSTEM_UI) {
preloadRecentApps();
}
} else if ((event.getFlags() & KeyEvent.FLAG_LONG_PRESS) != 0) {
if (!keyguardOn) {
handleLongPressOnHome(event.getDeviceId());
}
}
Log.d(TAG, "lisa-interceptKeyBeforeDispatching+13" );
return -1;
}
}
這段對應的log：
12-11 14:41:19.190 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked
12-11 14:41:19.190 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked+1
12-11 14:41:19.190 2427 3305 E InputDispatcher: lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1
12-11 14:41:19.191 2427 3305 D WindowManager: lisa-interceptKeyBeforeDispatching
12-11 14:41:19.191 2427 3305 D WindowManager: lisa-interceptKeyBeforeDispatching+13
12-11 14:41:19.191 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked
12-11 14:41:19.229 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked
12-11 14:41:19.229 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked+1
12-11 14:41:19.229 2427 3305 E InputDispatcher: lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1
12-11 14:41:19.229 2427 3305 D WindowManager: lisa-interceptKeyBeforeDispatching
12-11 14:41:19.239 2427 3305 D WindowManager: lisa-interceptKeyBeforeDispatching+5
12-11 14:41:19.239 2427 3305 E InputDispatcher: lisa-dispatchKeyLocked
到了
private void handleShortPressOnHome() {
// Turn on the connected TV and switch HDMI input if we're a HDMI playback device.
getHdmiControl().turnOnTv();
// If there's a dream running then use home to escape the dream
// but don't actually go home.
if (mDreamManagerInternal != null && mDreamManagerInternal.isDreaming()) {
mDreamManagerInternal.stopDream(false /*immediate*/);
return;
}
// Go home!
launchHomeFromHotKey();
}
到了
void launchHomeFromHotKey() {
launchHomeFromHotKey(true /* awakenFromDreams */, true /*respectKeyguard*/);
}
到了
void launchHomeFromHotKey(final boolean awakenFromDreams, final boolean respectKeyguard) {
Slog.e(TAG, "lisa-launchHomeFromHotKey");
if (respectKeyguard) {
if (isKeyguardShowingAndNotOccluded()) {
// don't launch home if keyguard showing
return;
}
if (!mHideLockScreen && mKeyguardDelegate.isInputRestricted()) {
// when in keyguard restricted mode, must first verify unlock
// before launching home
mKeyguardDelegate.verifyUnlock(new OnKeyguardExitResult() {
@Override
public void onKeyguardExitResult(boolean success) {
if (success) {
try {
ActivityManagerNative.getDefault().stopAppSwitches();
} catch (RemoteException e) {
}
Slog.e(TAG, "lisa-launchHomeFromHotKey 1");
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_HOME_KEY);
startDockOrHome(true /*fromHomeKey*/, awakenFromDreams);
}
}
});
return;
}
}
// no keyguard stuff to worry about, just launch home!
try {
ActivityManagerNative.getDefault().stopAppSwitches();
} catch (RemoteException e) {
}
if (mRecentsVisible) {
// Hide Recents and notify it to launch Home
if (awakenFromDreams) {
awakenDreams();
}
Slog.e(TAG, "lisa-launchHomeFromHotKey 2");
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_HOME_KEY);
hideRecentApps(false, true);
} else {
// Otherwise, just launch Home
Slog.e(TAG, "lisa-launchHomeFromHotKey 3");
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_HOME_KEY);
startDockOrHome(true /*fromHomeKey*/, awakenFromDreams);
}
}
到了
void startDockOrHome(boolean fromHomeKey, boolean awakenFromDreams) {
if (awakenFromDreams) {
awakenDreams();
}
Intent dock = createHomeDockIntent();
if (dock != null) {
try {
if (fromHomeKey) {
dock.putExtra(WindowManagerPolicy.EXTRA_FROM_HOME_KEY, fromHomeKey);
}
startActivityAsUser(dock, UserHandle.CURRENT);
return;
} catch (ActivityNotFoundException e) {
}
}
Slog.e(TAG, "lisa-startDockOrHome");
Intent intent;
if (fromHomeKey) {
intent = new Intent(mHomeIntent);
intent.putExtra(WindowManagerPolicy.EXTRA_FROM_HOME_KEY, fromHomeKey);
} else {
intent = mHomeIntent;
}
startActivityAsUser(intent, UserHandle.CURRENT);最後start activity 返回home 介面
}
log如下
12-11 15:12:41.630 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked
12-11 15:12:41.630 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked+1
12-11 15:12:41.630 2373 3227 E InputDispatcher: lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1
12-11 15:12:41.631 2373 3227 D WindowManager: lisa-interceptKeyBeforeDispatching
12-11 15:12:41.631 2373 3227 D WindowManager: lisa-interceptKeyBeforeDispatching+13
12-11 15:12:41.631 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked
12-11 15:12:41.685 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked
12-11 15:12:41.685 2373 3227 E InputDispatcher: lisa-dispatchKeyLocked+1
12-11 15:12:41.686 2373 3227 E InputDispatcher: lisa-doInterceptKeyBeforeDispatchingLockedInterruptible+1
12-11 15:12:41.686 2373 3227 D WindowManager: lisa-interceptKeyBeforeDispatching
12-11 15:12:41.690 2373 3227 E WindowManager: lisa-launchHomeFromHotKey
12-11 15:12:41.690 2373 3227 E WindowManager: lisa-launchHomeFromHotKey 3
12-11 15:12:41.696 2373 3227 E WindowManager: lisa-startDockOrHome
12-11 15:12:41.704 2373 3227 D WindowManager: lisa-interceptKeyBeforeDispatching+5