Merge "Add removeState method to StateMachine" am: 0310de1136 am: 01106c45ca (a95fc5fe) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/util/StateMachine.java

+28 −0

Original line number	Diff line number	Diff line
		@@ -1189,6 +1189,26 @@ public class StateMachine {
		return stateInfo;
		}

		/**
		* Remove a state from the state machine. Will not remove the state if it is currently
		* active or if it has any children in the hierarchy.
		* @param state the state to remove
		*/
		private void removeState(State state) {
		StateInfo stateInfo = mStateInfo.get(state);
		if (stateInfo == null \|\| stateInfo.active) {
		return;
		}
		boolean isParent = mStateInfo.values().stream()
		.filter(si -> si.parentStateInfo == stateInfo)
		.findAny()
		.isPresent();
		if (isParent) {
		return;
		}
		mStateInfo.remove(state);
		}

		/**
		* Constructor
		*
		@@ -1336,6 +1356,14 @@ public class StateMachine {
		mSmHandler.addState(state, null);
		}

		/**
		* Removes a state from the state machine, unless it is currently active or if it has children.
		* @param state state to remove
		*/
		public final void removeState(State state) {
		mSmHandler.removeState(state);
		}

		/**
		* Set the initial state. This must be invoked before
		* and messages are sent to the state machine.