How to open html file from specific folder in WebView on Android

Question

In my application i have one HTML file and i save this in specific folder!
I want open this file into WebView and for his i write below codes.
When run application and open WebView show me Web page not available error on WebView !

My codes:

htmlReaderPage_reader.getSettings().setJavaScriptEnabled(true);
htmlReaderPage_reader.setInitialScale(1);
htmlReaderPage_reader.getSettings().setLoadWithOverviewMode(true);
htmlReaderPage_reader.getSettings().setUseWideViewPort(true);
htmlReaderPage_reader.getSettings().setBuiltInZoomControls(false);
htmlReaderPage_reader.getSettings().setPluginState(WebSettings.PluginState.ON);
htmlReaderPage_reader.getSettings().setDomStorageEnabled(true);
htmlReaderPage_reader.getSettings().setDatabaseEnabled(true);
htmlReaderPage_reader.setWebViewClient(new WebViewClient());
htmlReaderPage_reader.setVerticalScrollBarEnabled(true);
htmlReaderPage_reader.setHorizontalScrollBarEnabled(true);

htmlReaderPage_reader.loadUrl("file:///root/sdcard/my_folder/index.html");

UPDATE:

I change my code with this:

htmlReaderPage_reader.loadUrl("file:///"+Environment.getExternalStorageDirectory().getPath() + "/my_folder/index.html");

but again not read this html file!

How can i fix this and open Html file from specific folder?

Answer 1

Because you need to read de internal folder

First you need to locate the file in assets

assets/index.html

Atfer read the file

/app/src/main/assets/index.html