+ public static void set_state(int serial, AltosState state, AltosListenerState listener_state) {
+
+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
+
+ try {
+ ObjectOutputStream oos = new ObjectOutputStream(baos);
+
+ AltosSavedState saved_state = new AltosSavedState(state, listener_state);
+ oos.writeObject(saved_state);
+
+ byte[] bytes = baos.toByteArray();
+
+ synchronized(backend) {
+ backend.putBytes(String.format(statePreferenceFormat, serial), bytes);
+ flush_preferences();
+ }
+ } catch (IOException ie) {
+ }
+ }
+
+ public static AltosSavedState state(int serial) {
+ byte[] bytes = null;
+
+ synchronized(backend) {
+ bytes = backend.getBytes(String.format(statePreferenceFormat, serial), null);
+ }
+
+ if (bytes == null)
+ return null;
+
+ ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
+
+ try {
+ ObjectInputStream ois = new ObjectInputStream(bais);
+ AltosSavedState saved_state = (AltosSavedState) ois.readObject();
+ return saved_state;
+ } catch (IOException ie) {
+ } catch (ClassNotFoundException ce) {
+ }
+ return null;
+ }
+