Saved Games Snapshot initialization (null object reference)
问题 I am trying to use the new Saved Games (Snapshot) API But I keep getting this error: java.lang.NullPointerException: Attempt to invoke interface method 'boolean com.google.android.gms.games.snapshot.Snapshot.writeBytes(byte[])' on a null object reference Here's the code for what I'm trying Snapshot snapshot = new Snapshot(); snapshot.writeBytes(my_app_state); // Save the snapshot. SnapshotMetadataChange metadataChange = new SnapshotMetadataChange.Builder() .setDescription("Completed %" +