Update README.md

README.md

@@ -44,6 +44,34 @@ Link package using [rnpm](https://github.com/rnpm/rnpm)
 rnpm link
 ```
 
+Add this code to `MainApplication.java`
+
+```diff
+...
++ import com.RNFetchBlob.RNFetchBlobPackage;
+...
+protected List<ReactPackage> getPackages() {
+      return Arrays.<ReactPackage>asList(
+          new MainReactPackage(),
++          new RNFetchBlobPackage()
+      );
+    }
+  };
+...
+```
+
+And this code to `MainActivity.java` (react-native >= 0.29.0)
+
+```diff
+...
++    @Override
++    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
++        RNPermissionsPackage.onRequestPermissionsResult(requestCode, permissions, grantResults); // very important event callback
++        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
++    }
+...
+```
+
 **Grant Permission to External storage for Android 5.0 or lower**
 
 Mechanism about granting Android permissions has slightly different since Android 6.0 released, please refer to [Official Document](https://developer.android.com/training/permissions/requesting.html).