WebView.txt

public class ContentActivity extends AppCompatActivity {

    WebView wv_content;
    String url;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_content);

        wv_content = (WebView) findViewById(R.id.wv_content);
        int mon = getIntent().getIntExtra("position", 0);
        url = "file:///android_asset/" + mon + ".html";
        wv_content.getSettings().setJavaScriptEnabled(true);
        wv_content.loadUrl(url);
        wv_content.setWebViewClient(new MyBrower());
        ads();
    }

    private void ads() {
        AdView avBanner =(AdView)findViewById(R.id.av_banner);
         AdRequest  adRequest = new AdRequest.Builder().build();
        avBanner.loadAd(adRequest);
    }

    private class MyBrower extends WebViewClient {

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);

            return true;
        }
    }
}