Update README.md

Author: smartdevelopers-ir

README.md

@@ -1,2 +1,38 @@
 # SmartFilePicker
-A biuty file picker
+This is Telegram like File Picker for android .
+
+# Usage 
+* open File Picker
+``` java
+Bundle extra=new Bundle();
+extra.putInt("my_number",10);
+Intent intent = new SmartFilePicker.IntentBuilder()
+       .showCamera(true)
+       .canSelectMultipleInGallery(true)
+       .showGalleryTab(true)
+       .showPickFromSystemGalleyMenu(true)
+       .setExtra(extra)
+       .setFileFilter(new SFBFileFilter.Builder().isFile(true).isFolder(true).build())
+       .canSelectMultipleInFiles(true)
+       .build(this);
+startActivityForResult(intent, 10);
+```
+* Getting result 
+``` java
+@Override
+protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
+    super.onActivityResult(requestCode, resultCode, data);
+    if (requestCode==10){
+        if (data!=null) {
+            Uri[] uris= SmartFilePicker.getResultUris(data);
+            if (uris!=null){
+               // do somthing with selected files uri
+            }
+            Bundle extra= SmartFilePicker.getExtra(data);
+            if (extra != null) {
+               int number = extra.getInt("my_number");
+            }
+        }
+    }
+  }
+```