Merge "Add logging to MediaSessionStack" (b6159f31) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/media/MediaSessionStack.java

+23 −0

Original line number	Diff line number	Diff line
		@@ -24,6 +24,8 @@ import android.os.UserHandle;
		import android.util.Log;
		import android.util.SparseArray;

		import com.android.server.utils.EventLogger;

		import java.io.PrintWriter;
		import java.util.ArrayList;
		import java.util.List;
		@@ -38,6 +40,8 @@ class MediaSessionStack {
		private static final boolean DEBUG = MediaSessionService.DEBUG;
		private static final String TAG = "MediaSessionStack";

		private static final int DUMP_EVENTS_MAX_COUNT = 70;

		/**
		* Listen the change in the media button session.
		*/
		@@ -57,6 +61,8 @@ class MediaSessionStack {
		private final AudioPlayerStateMonitor mAudioPlayerStateMonitor;
		private final OnMediaButtonSessionChangedListener mOnMediaButtonSessionChangedListener;

		private final EventLogger mEventLogger = new EventLogger(DUMP_EVENTS_MAX_COUNT, TAG);

		/**
		* The media button session which receives media key events.
		* It could be null if the previous media button session is released.
		@@ -80,6 +86,11 @@ class MediaSessionStack {
		* @param record The record to add.
		*/
		public void addSession(MediaSessionRecordImpl record) {
		mEventLogger.enqueue(EventLogger.StringEvent.from(
		"addSession() (to bottom of stack)",
		"record: %s",
		record
		));
		mSessions.add(record);
		clearCache(record.getUserId());

		@@ -95,6 +106,11 @@ class MediaSessionStack {
		* @param record The record to remove.
		*/
		public void removeSession(MediaSessionRecordImpl record) {
		mEventLogger.enqueue(EventLogger.StringEvent.from(
		"removeSession()",
		"record: %s",
		record
		));
		mSessions.remove(record);
		if (mMediaButtonSession == record) {
		// When the media button session is removed, nullify the media button session and do not
		@@ -140,6 +156,11 @@ class MediaSessionStack {
		public void onPlaybackStateChanged(
		MediaSessionRecordImpl record, boolean shouldUpdatePriority) {
		if (shouldUpdatePriority) {
		mEventLogger.enqueue(EventLogger.StringEvent.from(
		"onPlaybackStateChanged() - Pushing session to top",
		"record: %s",
		record
		));
		mSessions.remove(record);
		mSessions.add(0, record);
		clearCache(record.getUserId());
		@@ -344,6 +365,8 @@ class MediaSessionStack {
		for (MediaSessionRecordImpl record : mSessions) {
		record.dump(pw, indent);
		}
		pw.println(prefix + "Session stack events:");
		mEventLogger.dump(pw, indent);
		}

		/**