webview example that handles facebook comments

activity_web_view.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    android:id="@+id/container"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


</FrameLayout>

WebViewActivity.java

package ovh.meo.mypackage;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.CookieManager;
import android.webkit.CookieSyncManager;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;


public class WebViewActivity extends Activity {
    private static final String TAG = WebViewActivity.class.getSimpleName();


    protected WebView mainWebView;
    private Context mContext;
    private WebView mWebviewPop;
    private FrameLayout mContainer;

    // the url that points to the page where the facebook comments plugin is on
    private String url = "http://7d2fd1cd.ngrok.io/fb.html";// "http://stage.example.com";


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

        mContainer = (FrameLayout) findViewById(R.id.container);
        mContext = this.getApplicationContext();

        // if you want to make sure that we need to log in facebook again ...
//        clearCookies(this);

        CookieManager cookieManager = CookieManager.getInstance();
        cookieManager.setAcceptCookie(true);


        mainWebView = getWebView(mContext);

        // handle the opening of facebook
        mainWebView.setWebChromeClient(new MyCustomChromeClient());

        mainWebView.loadUrl(url);

        mContainer.addView(mainWebView);


    }


    /**
     * get webview with all necessary properties to support facebook login
     */
    WebView getWebView(Context context) {
        WebView wv = new WebView(context);
        wv.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT));

        wv.clearCache(true);

        // Settings for the webview
        WebSettings webSettings = wv.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webSettings.setAppCacheEnabled(true);
        webSettings.setDomStorageEnabled(true);
        webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
        webSettings.setSupportMultipleWindows(true);

        if (Build.VERSION.SDK_INT >= 21) {
            webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
            CookieManager.getInstance().setAcceptThirdPartyCookies(wv, true);
        }


        return wv;
    }


    private class MyCustomChromeClient extends WebChromeClient {

        @Override
        public boolean onCreateWindow(WebView view, boolean isDialog,
                                      boolean isUserGesture, Message resultMsg) {
            mWebviewPop = getWebView(mContext);
            mWebviewPop.setWebViewClient(new WebViewClient() {
                @Override
                public boolean shouldOverrideUrlLoading(WebView view, String url) {
                    String host = Uri.parse(url).getHost();
                    Log.d(TAG, "host=" + host);
                    if (host.contains("facebook.com")) {
                        view.loadUrl(url);
                        return true;
                    }

                    // Otherwise, the link is not for a page on my site, so launch
                    // another Activity that handles URLs
                    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
                    startActivity(intent);
                    return false;
                }
            });
            mWebviewPop.setWebChromeClient(new MyCustomChromeClient());

            mContainer.addView(mWebviewPop);

            WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
            transport.setWebView(mWebviewPop);
            resultMsg.sendToTarget();

            return true;
        }

        @Override
        public void onCloseWindow(WebView window) {
            // facebook login finishes, close the facebook window and return to the main one
            Log.d("onCloseWindow", "called");

            mWebviewPop.setVisibility(View.GONE);
            mContainer.removeView(mWebviewPop);
            mWebviewPop = null;

        }
    }

    @SuppressWarnings("deprecation")
    public static void clearCookies(Context context) {

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
            Log.d(TAG, "Using clearCookies code for API >=" + String.valueOf(Build.VERSION_CODES.LOLLIPOP_MR1));
            CookieManager.getInstance().removeAllCookies(null);
            CookieManager.getInstance().flush();
        } else {
            Log.d(TAG, "Using clearCookies code for API <" + String.valueOf(Build.VERSION_CODES.LOLLIPOP_MR1));
            CookieSyncManager cookieSyncMngr = CookieSyncManager.createInstance(context);
            cookieSyncMngr.startSync();
            CookieManager cookieManager = CookieManager.getInstance();
            cookieManager.removeAllCookie();
            cookieManager.removeSessionCookie();
            cookieSyncMngr.stopSync();
            cookieSyncMngr.sync();
        }
    }
}