Fix for External storage for KitKat

aFileChooser/src/com/ipaulpro/afilechooser/utils/FileUtils.java

@@ -283,10 +283,49 @@ else if (isExternalStorageDocument(uri)) {
                 final String type = split[0];
 
                 if ("primary".equalsIgnoreCase(type)) {
-                    return Environment.getExternalStorageDirectory() + "/" + split[1];
-                }
-
-                // TODO handle non-primary volumes
+					return Environment.getExternalStorageDirectory() + "/" + split[1];
+				}else {
+					// Below logic is how External Storage provider build URI for documents
+					// Based on http://stackoverflow.com/questions/28605278/android-5-sd-card-label and https://gist.github.com/prasad321/9852037
+					StorageManager mStorageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);
+
+					try {
+						Class<?> storageVolumeClazz = Class.forName("android.os.storage.StorageVolume");
+						Method getVolumeList = mStorageManager.getClass().getMethod("getVolumeList");
+						Method getUuid = storageVolumeClazz.getMethod("getUuid");
+						Method getState = storageVolumeClazz.getMethod("getState");
+						Method getPath = storageVolumeClazz.getMethod("getPath");
+						Method isPrimary = storageVolumeClazz.getMethod("isPrimary");
+						Method isEmulated = storageVolumeClazz.getMethod("isEmulated");
+
+						Object result = getVolumeList.invoke(mStorageManager);
+
+						final int length = Array.getLength(result);
+						for (int i = 0; i < length; i++) {
+							Object storageVolumeElement = Array.get(result, i);
+							//String uuid = (String) getUuid.invoke(storageVolumeElement);
+
+							final boolean mounted = Environment.MEDIA_MOUNTED.equals( getState.invoke(storageVolumeElement) )
+									|| Environment.MEDIA_MOUNTED_READ_ONLY.equals(getState.invoke(storageVolumeElement));
+
+							//if the media is not mounted, we need not get the volume details
+							if (!mounted) continue;
+
+							//Primary storage is already handled.
+							if ((Boolean)isPrimary.invoke(storageVolumeElement) && (Boolean)isEmulated.invoke(storageVolumeElement)) continue;
+
+							String uuid = (String) getUuid.invoke(storageVolumeElement);
+
+							if (uuid != null && uuid.equals(type))
+							{
+								String res =getPath.invoke(storageVolumeElement) + "/" +split[1];
+								return res;
+							}
+						}
+					}
+					catch (Exception ex) {
+					}
+				}
             }
             // DownloadsProvider
             else if (isDownloadsDocument(uri)) {