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Commit 0c71404e authored by Brad Ebinger's avatar Brad Ebinger
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Add handler callbacks to StateMachine 

Adds two callbacks to StateMachine that notify its user when (1) a message
is about to be processed in the StateMachine and (2) after the StateMachine
has successfully processed a message and has transitioned to a new
State.

Change-Id: I694793872a22f56b3092f5d8b39a116e385a64da
parent 62211c9b

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

+17 −0
Original line number Diff line number Diff line
@@ -778,6 +778,7 @@ public class StateMachine { 
         */

        @Override

        public final void handleMessage(Message msg) {

            mSm.onPreHandleMessage(msg);

            if (!mHasQuit) {

                if (mDbg) mSm.log("handleMessage: E msg.what=" + msg.what);
@@ -803,6 +804,7 @@ public class StateMachine { 
                // We need to check if mSm == null here as we could be quitting.

                if (mDbg && mSm != null) mSm.log("handleMessage: X");

            }

            mSm.onPostHandleMessage(msg);

        }



        /**
@@ -1273,6 +1275,21 @@ public class StateMachine { 
        initStateMachine(name, handler.getLooper());

    }



    /**

     * Notifies subclass that the StateMachine handler is about to process the Message msg

     * @param msg The message that is being handled

     */

    protected void onPreHandleMessage(Message msg) {

    }



    /**

     * Notifies subclass that the StateMachine handler has finished processing the Message msg and

     * has possibly transitioned to a new state.

     * @param msg The message that is being handled

     */

    protected void onPostHandleMessage(Message msg) {

    }



    /**

     * Add a new state to the state machine

     * @param state the state to add