in com/android/server/policy/PhoneWindowManager.java [5923:6291]
public int interceptKeyBeforeQueueing(KeyEvent event, int policyFlags) {
if (!mSystemBooted) {
// If we have not yet booted, don't let key events do anything.
return 0;
}
final boolean interactive = (policyFlags & FLAG_INTERACTIVE) != 0;
final boolean down = event.getAction() == KeyEvent.ACTION_DOWN;
final boolean canceled = event.isCanceled();
final int keyCode = event.getKeyCode();
final boolean isInjected = (policyFlags & WindowManagerPolicy.FLAG_INJECTED) != 0;
// If screen is off then we treat the case where the keyguard is open but hidden
// the same as if it were open and in front.
// This will prevent any keys other than the power button from waking the screen
// when the keyguard is hidden by another activity.
final boolean keyguardActive = (mKeyguardDelegate == null ? false :
(interactive ?
isKeyguardShowingAndNotOccluded() :
mKeyguardDelegate.isShowing()));
if (DEBUG_INPUT) {
Log.d(TAG, "interceptKeyTq keycode=" + keyCode
+ " interactive=" + interactive + " keyguardActive=" + keyguardActive
+ " policyFlags=" + Integer.toHexString(policyFlags));
}
// Basic policy based on interactive state.
int result;
boolean isWakeKey = (policyFlags & WindowManagerPolicy.FLAG_WAKE) != 0
|| event.isWakeKey();
if (interactive || (isInjected && !isWakeKey)) {
// When the device is interactive or the key is injected pass the
// key to the application.
result = ACTION_PASS_TO_USER;
isWakeKey = false;
if (interactive) {
// If the screen is awake, but the button pressed was the one that woke the device
// then don't pass it to the application
if (keyCode == mPendingWakeKey && !down) {
result = 0;
}
// Reset the pending key
mPendingWakeKey = PENDING_KEY_NULL;
}
} else if (!interactive && shouldDispatchInputWhenNonInteractive(event)) {
// If we're currently dozing with the screen on and the keyguard showing, pass the key
// to the application but preserve its wake key status to make sure we still move
// from dozing to fully interactive if we would normally go from off to fully
// interactive.
result = ACTION_PASS_TO_USER;
// Since we're dispatching the input, reset the pending key
mPendingWakeKey = PENDING_KEY_NULL;
} else {
// When the screen is off and the key is not injected, determine whether
// to wake the device but don't pass the key to the application.
result = 0;
if (isWakeKey && (!down || !isWakeKeyWhenScreenOff(keyCode))) {
isWakeKey = false;
}
// Cache the wake key on down event so we can also avoid sending the up event to the app
if (isWakeKey && down) {
mPendingWakeKey = keyCode;
}
}
// If the key would be handled globally, just return the result, don't worry about special
// key processing.
if (isValidGlobalKey(keyCode)
&& mGlobalKeyManager.shouldHandleGlobalKey(keyCode, event)) {
if (isWakeKey) {
wakeUp(event.getEventTime(), mAllowTheaterModeWakeFromKey, "android.policy:KEY");
}
return result;
}
boolean useHapticFeedback = down
&& (policyFlags & WindowManagerPolicy.FLAG_VIRTUAL) != 0
&& event.getRepeatCount() == 0;
// Handle special keys.
switch (keyCode) {
case KeyEvent.KEYCODE_BACK: {
if (down) {
interceptBackKeyDown();
} else {
boolean handled = interceptBackKeyUp(event);
// Don't pass back press to app if we've already handled it via long press
if (handled) {
result &= ~ACTION_PASS_TO_USER;
}
}
break;
}
case KeyEvent.KEYCODE_VOLUME_DOWN:
case KeyEvent.KEYCODE_VOLUME_UP:
case KeyEvent.KEYCODE_VOLUME_MUTE: {
if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
if (down) {
if (interactive && !mScreenshotChordVolumeDownKeyTriggered
&& (event.getFlags() & KeyEvent.FLAG_FALLBACK) == 0) {
mScreenshotChordVolumeDownKeyTriggered = true;
mScreenshotChordVolumeDownKeyTime = event.getDownTime();
mScreenshotChordVolumeDownKeyConsumed = false;
cancelPendingPowerKeyAction();
interceptScreenshotChord();
interceptAccessibilityShortcutChord();
}
} else {
mScreenshotChordVolumeDownKeyTriggered = false;
cancelPendingScreenshotChordAction();
cancelPendingAccessibilityShortcutAction();
}
} else if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
if (down) {
if (interactive && !mA11yShortcutChordVolumeUpKeyTriggered
&& (event.getFlags() & KeyEvent.FLAG_FALLBACK) == 0) {
mA11yShortcutChordVolumeUpKeyTriggered = true;
mA11yShortcutChordVolumeUpKeyTime = event.getDownTime();
mA11yShortcutChordVolumeUpKeyConsumed = false;
cancelPendingPowerKeyAction();
cancelPendingScreenshotChordAction();
interceptAccessibilityShortcutChord();
}
} else {
mA11yShortcutChordVolumeUpKeyTriggered = false;
cancelPendingScreenshotChordAction();
cancelPendingAccessibilityShortcutAction();
}
}
if (down) {
sendSystemKeyToStatusBarAsync(event.getKeyCode());
TelecomManager telecomManager = getTelecommService();
if (telecomManager != null) {
if (telecomManager.isRinging()) {
// If an incoming call is ringing, either VOLUME key means
// "silence ringer". We handle these keys here, rather than
// in the InCallScreen, to make sure we'll respond to them
// even if the InCallScreen hasn't come to the foreground yet.
// Look for the DOWN event here, to agree with the "fallback"
// behavior in the InCallScreen.
Log.i(TAG, "interceptKeyBeforeQueueing:"
+ " VOLUME key-down while ringing: Silence ringer!");
// Silence the ringer. (It's safe to call this
// even if the ringer has already been silenced.)
telecomManager.silenceRinger();
// And *don't* pass this key thru to the current activity
// (which is probably the InCallScreen.)
result &= ~ACTION_PASS_TO_USER;
break;
}
}
int audioMode = AudioManager.MODE_NORMAL;
try {
audioMode = getAudioService().getMode();
} catch (Exception e) {
Log.e(TAG, "Error getting AudioService in interceptKeyBeforeQueueing.", e);
}
boolean isInCall = (telecomManager != null && telecomManager.isInCall()) ||
audioMode == AudioManager.MODE_IN_COMMUNICATION;
if (isInCall && (result & ACTION_PASS_TO_USER) == 0) {
// If we are in call but we decided not to pass the key to
// the application, just pass it to the session service.
MediaSessionLegacyHelper.getHelper(mContext).sendVolumeKeyEvent(
event, AudioManager.USE_DEFAULT_STREAM_TYPE, false);
break;
}
}
if (mUseTvRouting || mHandleVolumeKeysInWM) {
// Defer special key handlings to
// {@link interceptKeyBeforeDispatching()}.
result |= ACTION_PASS_TO_USER;
} else if ((result & ACTION_PASS_TO_USER) == 0) {
// If we aren't passing to the user and no one else
// handled it send it to the session manager to
// figure out.
MediaSessionLegacyHelper.getHelper(mContext).sendVolumeKeyEvent(
event, AudioManager.USE_DEFAULT_STREAM_TYPE, true);
}
break;
}
case KeyEvent.KEYCODE_ENDCALL: {
result &= ~ACTION_PASS_TO_USER;
if (down) {
TelecomManager telecomManager = getTelecommService();
boolean hungUp = false;
if (telecomManager != null) {
hungUp = telecomManager.endCall();
}
if (interactive && !hungUp) {
mEndCallKeyHandled = false;
mHandler.postDelayed(mEndCallLongPress,
ViewConfiguration.get(mContext).getDeviceGlobalActionKeyTimeout());
} else {
mEndCallKeyHandled = true;
}
} else {
if (!mEndCallKeyHandled) {
mHandler.removeCallbacks(mEndCallLongPress);
if (!canceled) {
if ((mEndcallBehavior
& Settings.System.END_BUTTON_BEHAVIOR_HOME) != 0) {
if (goHome()) {
break;
}
}
if ((mEndcallBehavior
& Settings.System.END_BUTTON_BEHAVIOR_SLEEP) != 0) {
goToSleep(event.getEventTime(),
PowerManager.GO_TO_SLEEP_REASON_POWER_BUTTON, 0);
isWakeKey = false;
}
}
}
}
break;
}
case KeyEvent.KEYCODE_POWER: {
// Any activity on the power button stops the accessibility shortcut
cancelPendingAccessibilityShortcutAction();
result &= ~ACTION_PASS_TO_USER;
isWakeKey = false; // wake-up will be handled separately
if (down) {
interceptPowerKeyDown(event, interactive);
} else {
interceptPowerKeyUp(event, interactive, canceled);
}
break;
}
case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_DOWN:
// fall through
case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_UP:
// fall through
case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_LEFT:
// fall through
case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_RIGHT: {
result &= ~ACTION_PASS_TO_USER;
interceptSystemNavigationKey(event);
break;
}
case KeyEvent.KEYCODE_SLEEP: {
result &= ~ACTION_PASS_TO_USER;
isWakeKey = false;
if (!mPowerManager.isInteractive()) {
useHapticFeedback = false; // suppress feedback if already non-interactive
}
if (down) {
sleepPress(event.getEventTime());
} else {
sleepRelease(event.getEventTime());
}
break;
}
case KeyEvent.KEYCODE_SOFT_SLEEP: {
result &= ~ACTION_PASS_TO_USER;
isWakeKey = false;
if (!down) {
mPowerManagerInternal.setUserInactiveOverrideFromWindowManager();
}
break;
}
case KeyEvent.KEYCODE_WAKEUP: {
result &= ~ACTION_PASS_TO_USER;
isWakeKey = true;
break;
}
case KeyEvent.KEYCODE_MEDIA_PLAY:
case KeyEvent.KEYCODE_MEDIA_PAUSE:
case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
case KeyEvent.KEYCODE_HEADSETHOOK:
case KeyEvent.KEYCODE_MUTE:
case KeyEvent.KEYCODE_MEDIA_STOP:
case KeyEvent.KEYCODE_MEDIA_NEXT:
case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
case KeyEvent.KEYCODE_MEDIA_REWIND:
case KeyEvent.KEYCODE_MEDIA_RECORD:
case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD:
case KeyEvent.KEYCODE_MEDIA_AUDIO_TRACK: {
if (MediaSessionLegacyHelper.getHelper(mContext).isGlobalPriorityActive()) {
// If the global session is active pass all media keys to it
// instead of the active window.
result &= ~ACTION_PASS_TO_USER;
}
if ((result & ACTION_PASS_TO_USER) == 0) {
// Only do this if we would otherwise not pass it to the user. In that
// case, the PhoneWindow class will do the same thing, except it will
// only do it if the showing app doesn't process the key on its own.
// Note that we need to make a copy of the key event here because the
// original key event will be recycled when we return.
mBroadcastWakeLock.acquire();
Message msg = mHandler.obtainMessage(MSG_DISPATCH_MEDIA_KEY_WITH_WAKE_LOCK,
new KeyEvent(event));
msg.setAsynchronous(true);
msg.sendToTarget();
}
break;
}
case KeyEvent.KEYCODE_CALL: {
if (down) {
TelecomManager telecomManager = getTelecommService();
if (telecomManager != null) {
if (telecomManager.isRinging()) {
Log.i(TAG, "interceptKeyBeforeQueueing:"
+ " CALL key-down while ringing: Answer the call!");
telecomManager.acceptRingingCall();
// And *don't* pass this key thru to the current activity
// (which is presumably the InCallScreen.)
result &= ~ACTION_PASS_TO_USER;
}
}
}
break;
}
case KeyEvent.KEYCODE_VOICE_ASSIST: {
// Only do this if we would otherwise not pass it to the user. In that case,
// interceptKeyBeforeDispatching would apply a similar but different policy in
// order to invoke voice assist actions. Note that we need to make a copy of the
// key event here because the original key event will be recycled when we return.
if ((result & ACTION_PASS_TO_USER) == 0 && !down) {
mBroadcastWakeLock.acquire();
Message msg = mHandler.obtainMessage(MSG_LAUNCH_VOICE_ASSIST_WITH_WAKE_LOCK,
keyguardActive ? 1 : 0, 0);
msg.setAsynchronous(true);
msg.sendToTarget();
}
break;
}
case KeyEvent.KEYCODE_WINDOW: {
if (mShortPressWindowBehavior == SHORT_PRESS_WINDOW_PICTURE_IN_PICTURE) {
if (mPictureInPictureVisible) {
// Consumes the key only if picture-in-picture is visible to show
// picture-in-picture control menu. This gives a chance to the foreground
// activity to customize PIP key behavior.
if (!down) {
showPictureInPictureMenu(event);
}
result &= ~ACTION_PASS_TO_USER;
}
}
break;
}
}
if (useHapticFeedback) {
performHapticFeedbackLw(null, HapticFeedbackConstants.VIRTUAL_KEY, false);
}
if (isWakeKey) {
wakeUp(event.getEventTime(), mAllowTheaterModeWakeFromKey, "android.policy:KEY");
}
return result;
}