/**
* Starts the biometric unlock if it should be started based on a number of factors. If it should
* not be started, it either goes to the back up, or remains showing to prepare for it being
* started later.
*/
private void maybeStartBiometricUnlock() {
log("maybeStartBiometricUnlock() is called.");
if (mBiometricUnlock != null) {
KeyguardUpdateMonitor monitor = KeyguardUpdateMonitor.getInstance(mContext);
final boolean backupIsTimedOut =
(monitor.getFailedUnlockAttempts() >= LockPatternUtils.FAILED_ATTEMPTS_BEFORE_TIMEOUT);
final boolean mediaPlaying =
AudioSystem.isStreamActive(AudioSystem.STREAM_MUSIC, 0)
|| AudioSystem.isStreamActive(AudioSystem.STREAM_ALARM, 0);
boolean isBouncerVisibleToUser;
synchronized (mIsBouncerVisibleToUserLock) {
isBouncerVisibleToUser = mIsBouncerVisibleToUser;
}
// Don't start it if the bouncer is not showing, but keep this view up because we want
// it here and ready for when the bouncer does show.
if (!isBouncerVisibleToUser) {
if (mediaPlaying) {
log(
"maybeStartBiometricUnlock() - isBouncerVisibleToUser is false"
+ " && mediaPlaying is true, call mBiometricUnlock.stopAndShowBackup()");
mBiometricUnlock.stopAndShowBackup();
} else {
log(
"maybeStartBiometricUnlock() - isBouncerVisibleToUser is false,"
+ " call mBiometricUnlock.stop()");
mBiometricUnlock.stop(); // It shouldn't be running but calling this can't hurt.
}
return;
}
// Although these same conditions are handled in KeyguardSecurityModel, they are still
// necessary here. When a tablet is rotated 90 degrees, a configuration change is
// triggered and everything is torn down and reconstructed. That means
// KeyguardSecurityModel gets a chance to take care of the logic and doesn't even
// reconstruct KeyguardFaceUnlockView if the biometric unlock should be suppressed.
// However, for a 180 degree rotation, no configuration change is triggered, so only
// the logic here is capable of suppressing Face Unlock.
if (monitor.getPhoneState() == TelephonyManager.CALL_STATE_IDLE
&& monitor.isAlternateUnlockEnabled()
&& !monitor.getMaxBiometricUnlockAttemptsReached()
&& !backupIsTimedOut
&& !mediaPlaying) {
mBiometricUnlock.start();
} else {
log("maybeStartBiometricUnlock() - call stopAndShowBackup()");
mBiometricUnlock.stopAndShowBackup();
}
}
}
