moonlight-android/app/src/main/java/com/limelight/HelpActivity.java

package com.limelight;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import com.limelight.utils.SpinnerDialog;

public class HelpActivity extends Activity {

    private SpinnerDialog loadingDialog;
    private WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        webView = new WebView(this);
        setContentView(webView);

        // These allow the user to zoom the page
        webView.getSettings().setBuiltInZoomControls(true);
        webView.getSettings().setDisplayZoomControls(false);

        // This sets the view to display the whole page by default
        webView.getSettings().setUseWideViewPort(true);
        webView.getSettings().setLoadWithOverviewMode(true);

        // This allows the links to places on the same page to work
        webView.getSettings().setJavaScriptEnabled(true);

        webView.setWebViewClient(new WebViewClient() {
            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                if (loadingDialog == null) {
                    loadingDialog = SpinnerDialog.displayDialog(HelpActivity.this,
                            getResources().getString(R.string.help_loading_title),
                            getResources().getString(R.string.help_loading_msg), false);
                }
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                if (loadingDialog != null) {
                    loadingDialog.dismiss();
                    loadingDialog = null;
                }
            }

            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                return !(url.toUpperCase().startsWith("https://github.com/moonlight-stream/moonlight-docs/wiki/".toUpperCase()) ||
                        url.toUpperCase().startsWith("http://github.com/moonlight-stream/moonlight-docs/wiki/".toUpperCase()));
            }
        });

        webView.loadUrl(getIntent().getData().toString());
    }

    @Override
    public void onBackPressed() {
        // Back goes back through the WebView history
        // until no more history remains
        if (webView.canGoBack()) {
            webView.goBack();
        }
        else {
            super.onBackPressed();
        }
    }
}