Add main bundle folder #138

src/android/src/main/java/com/RNFetchBlob/RNFetchBlobFS.java

 package com.RNFetchBlob;
 
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
 import android.content.res.AssetFileDescriptor;
 import android.media.MediaScannerConnection;
 import android.net.Uri;
      */
     static public Map<String, Object> getSystemfolders(ReactApplicationContext ctx) {
         Map<String, Object> res = new HashMap<>();
+
+        PackageManager m = ctx.getPackageManager();
+        String s = ctx.getPackageName();
+        PackageInfo p = null;
+
+        try {
+            p = m.getPackageInfo(s, 0);
+            s = p.applicationInfo.dataDir;
+            res.put("DocumentDir", s);
+        } catch (PackageManager.NameNotFoundException e) {
+            e.printStackTrace();
+        }
         res.put("DocumentDir", ctx.getFilesDir().getAbsolutePath());
         res.put("CacheDir", ctx.getCacheDir().getAbsolutePath());
         res.put("DCIMDir", Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getAbsolutePath());
      * @param event Event name, `data`, `end`, `error`, etc.
      * @param data  Event data
      */
-    void emitStreamEvent(String streamName, String event, String data) {
+    private void emitStreamEvent(String streamName, String event, String data) {
         WritableMap eventData = Arguments.createMap();
         eventData.putString("event", event);
         eventData.putString("detail", data);
         this.emitter.emit(streamName, eventData);
     }
 
-    void emitStreamEvent(String streamName, String event, WritableArray  data) {
+    private void emitStreamEvent(String streamName, String event, WritableArray data) {
         WritableMap eventData = Arguments.createMap();
         eventData.putString("event", event);
         eventData.putArray("detail", data);
 
     }
 
-    public static boolean isAsset(String path) {
+    static boolean isAsset(String path) {
         if(path != null)
             return path.startsWith(RNFetchBlobConst.FILE_PREFIX_BUNDLE_ASSET);
         return false;
     }
 
-    public static String normalizePath(String path) {
+    static String normalizePath(String path) {
         if(path == null)
             return null;
         Uri uri = Uri.parse(path);

src/ios/RNFetchBlobFS.m

 
 #pragma mark - system directories
 
++ (NSString *) getMainBundleDir {
+    return [[NSBundle mainBundle] bundlePath];
+}
+
 + (NSString *) getCacheDir {
     return [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject];
 }