Fixed collapsed notification not getting colored.

app/src/main/java/com/kabouzeid/gramophone/helper/PlayingNotificationHelper.java

@@ -242,6 +242,7 @@ public class PlayingNotificationHelper {
     }
 
     private void setBackgroundColor(int color) {
+        notificationLayout.setInt(R.id.root, "setBackgroundColor", color);
         notificationLayoutExpanded.setInt(R.id.root, "setBackgroundColor", color);
     }
 

app/src/main/java/com/kabouzeid/gramophone/util/InternalStorageUtil.java

@@ -11,20 +11,38 @@ import java.io.ObjectOutputStream;
 
 /**
  * @author Karim Abou Zeid (kabouzeid)
+ *         <p/>
+ *         A simple helper class for Android to read and write
+ *         any serializeable object to the internal storage
  */
 public final class InternalStorageUtil {
 
+    /**
+     * @param context a valid {@link Context}
+     * @param key     the filename
+     * @param object  any {@link java.io.Serializable} object which will be written to the internal storage
+     */
     public static synchronized void writeObject(final Context context, final String key, final Object object) throws IOException {
-        String tempFileName = "TEMP_" + key;
+        // First write the object to a file with ".tmp" postfix,
+        // so when an error occurs, we do not overwrite the original
+        // file (if exists) with a corrupted file.
+        String tempFileName = key + ".tmp";
         FileOutputStream fos;
         fos = context.openFileOutput(tempFileName, Context.MODE_PRIVATE);
         ObjectOutputStream oos = new ObjectOutputStream(fos);
         oos.writeObject(object);
         oos.close();
         fos.close();
+        // after writing was successful we overwrite the original
+        // file (if exists) with the new file
         renameAppFile(context, tempFileName, key);
     }
 
+    /**
+     * @param context          a valid {@link Context}
+     * @param originalFileName the original filename
+     * @param newFileName      the new filename
+     */
     public static synchronized void renameAppFile(final Context context, String originalFileName, String newFileName) {
         File originalFile = context.getFileStreamPath(originalFileName);
         File newFile = new File(originalFile.getParent(), newFileName);
@@ -35,6 +53,10 @@ public final class InternalStorageUtil {
         originalFile.renameTo(newFile);
     }
 
+    /**
+     * @param context a valid {@link Context}
+     * @param key     the filename
+     */
     public static synchronized Object readObject(final Context context, String key) throws IOException,
             ClassNotFoundException {
         FileInputStream fis = context.openFileInput(key);