Load local HTML file with image in Android WebView

Question

I have downloaded 2 files (1 HTML file and 1 image) from server in Environment.DIRECTORY_DOWNLOADS. Now i am trying to load the HTML file (with image) saved in Environment.DIRECTORY_DOWNLOADS in webview. But nothing is loaded.

What's the problem?

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    webView = (WebView) findViewById(R.id.webView);
    button = (Button) findViewById(R.id.button);

    File file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
    File htmlFile = new File(file.getAbsolutePath()+"/test.html");
    webView.loadUrl(htmlFile.getAbsolutePath());
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            try {
                myDownload("http://xxxxxx.com/xxxx/test.html");
                myDownload("http://xxxxxx.com/xxxx/mypic1.jpg");
            } catch (Exception e) {
                Toast.makeText(MainActivity.this, e.getMessage() + "\n" + e.getCause(), Toast.LENGTH_LONG).show();
            }
            //
        }
    });
}