Use nanoseconds to detect delayed callbacks

src/ch/blinkenlights/android/vanilla/PlaybackActivity.java

@@ -35,7 +35,6 @@ import android.os.HandlerThread;
 import android.os.Looper;
 import android.os.Message;
 import android.os.Process;
-import android.os.SystemClock;
 import android.os.Environment;
 import android.view.ContextMenu;
 import android.view.KeyEvent;
@@ -237,7 +236,7 @@ public abstract class PlaybackActivity extends Activity
 
 	protected void setState(final int state)
 	{
-		mLastStateEvent = SystemClock.uptimeMillis();
+		mLastStateEvent = System.nanoTime();
 
 		if (mState != state) {
 			final int toggled = mState ^ state;
@@ -257,7 +256,7 @@ public abstract class PlaybackActivity extends Activity
 	 */
 	public void setState(long uptime, int state)
 	{
-		if (uptime > mLastStateEvent)
+		if (uptime >= mLastStateEvent)
 			setState(state);
 	}
 
@@ -285,7 +284,7 @@ public abstract class PlaybackActivity extends Activity
 
 	protected void setSong(final Song song)
 	{
-		mLastSongEvent = SystemClock.uptimeMillis();
+		mLastSongEvent = System.nanoTime();
 		runOnUiThread(new Runnable() {
 			@Override
 			public void run()
@@ -311,7 +310,7 @@ public abstract class PlaybackActivity extends Activity
 	 */
 	public void setSong(long uptime, Song song)
 	{
-		if (uptime > mLastSongEvent)
+		if (uptime >= mLastSongEvent)
 			setSong(song);
 	}
 

src/ch/blinkenlights/android/vanilla/PlaybackService.java

@@ -942,7 +942,7 @@ public final class PlaybackService extends Service
 
 		if (state != oldState) {
 			mHandler.sendMessage(mHandler.obtainMessage(MSG_PROCESS_STATE, oldState, state));
-			mHandler.sendMessage(mHandler.obtainMessage(MSG_BROADCAST_CHANGE, state, 0));
+			mHandler.sendMessage(mHandler.obtainMessage(MSG_BROADCAST_CHANGE, state, 0, new TimestampedObject(null)));
 		}
 
 		return state;
@@ -1292,7 +1292,7 @@ public final class PlaybackService extends Service
 
 		mMediaPlayerInitialized = false;
 		mHandler.sendMessage(mHandler.obtainMessage(MSG_PROCESS_SONG, song));
-		mHandler.sendMessage(mHandler.obtainMessage(MSG_BROADCAST_CHANGE, -1, 0, song));
+		mHandler.sendMessage(mHandler.obtainMessage(MSG_BROADCAST_CHANGE, -1, 0, new TimestampedObject(song)));
 		return song;
 	}
 
@@ -1515,7 +1515,8 @@ public final class PlaybackService extends Service
 			processNewState(message.arg1, message.arg2);
 			break;
 		case MSG_BROADCAST_CHANGE:
-			broadcastChange(message.arg1, (Song)message.obj, message.getWhen());
+			TimestampedObject tso = (TimestampedObject)message.obj;
+			broadcastChange(message.arg1, (Song)tso.object, tso.uptime);
 			break;
 		case MSG_ENTER_SLEEP_STATE:
 			enterSleepState();

src/ch/blinkenlights/android/vanilla/TimestampedObject.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2015 Adrian Ulrich <adrian@blinkenlights.ch>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>. 
+ */
+
+package ch.blinkenlights.android.vanilla;
+
+
+
+public class TimestampedObject {
+	public long uptime;
+	public Object object;
+
+	/**
+	 * Encapsulates given object and marks the creation timestamp
+	 * in nanoseconds
+	 */
+	public TimestampedObject(Object object) {
+		this.object = object;
+		this.uptime = System.nanoTime();
+	}
+
+}