WebViewFacebook.java

 /*******************************************************************************
 * Copyright (c) 2012 rmateus.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 ******************************************************************************/

 package com.aptoide.amethyst.social;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.aptoide.amethyst.Aptoide;
import com.aptoide.amethyst.AptoideBaseActivity;
import com.aptoide.amethyst.R;

import java.net.MalformedURLException;
import java.net.URL;

public class WebViewFacebook extends AptoideBaseActivity {

	private String url;
	private WebView webView;
	private TextView waitingText;
	private ProgressBar waitingProgress;

	protected static String OAUTH_ENDPOINT = "http://www.facebook.com/aptoide";
	public static final String REDIRECT_URI = "fbconnect://success";
	public static final String CANCEL_URI = "fbconnect:cancel";
	static final String DISPLAY_STRING = "touch";


    @Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		//Aptoide.getThemePicker().setAptoideTheme(this);
		setContentView(R.layout.webview_social);

		Bundle parameters = new Bundle();
//		parameters.putString("client_id", APP_ID);
		parameters.putString("type", "user_agent");
		parameters.putString("redirect_uri", REDIRECT_URI);
		url = OAUTH_ENDPOINT + "?" + encodeUrl(parameters);
//		Log.d(this.getClass().getName(), "url: " + url);

		waitingText = (TextView) findViewById(R.id.waiting_text);
		waitingProgress = (ProgressBar) findViewById(R.id.waiting_bar);

		webView = (WebView) findViewById(R.id.webview);
		webView.getSettings().setJavaScriptEnabled(true);
		webView.setVerticalScrollBarEnabled(false);
		webView.setHorizontalScrollBarEnabled(false);
		webView.setWebViewClient(new FbWebViewClient());

		webView.setWebChromeClient(new WebChromeClient() {
			public void onProgressChanged(WebView view, int progress) {
				setProgress(progress * 100);

				if (progress == 100) {
					waitingText.setVisibility(View.GONE);
					waitingProgress.setVisibility(View.GONE);
				}
			}
		});

		webView.loadUrl(url);

		System.out.println("Debug: WebViewActionBar: " + getSupportActionBar());

		Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);
		mToolbar.setCollapsible(false);

		setSupportActionBar(mToolbar);

		if (getSupportActionBar() != null) {
			getSupportActionBar().setTitle("");
			getSupportActionBar().setHomeButtonEnabled(true);
			getSupportActionBar().setDisplayHomeAsUpEnabled(true);
		}

    }

	private class FbWebViewClient extends WebViewClient {
		@Override
		public boolean shouldOverrideUrlLoading(WebView view, String url) {
			Log.d(this.getClass().getName(), "return url: " + url);
			if (url.startsWith(REDIRECT_URI)) {
				Bundle values = parseUrl(url);
				Log.d(this.getClass().getName(), "values: " + printBundle(values));
				String error = values.getString("error_reason");
				if (error == null) {
					Log.d(this.getClass().getName(), "error was null");
				} else {
					Log.d(this.getClass().getName(), "error was not null");
				}
				return true;
			} else if (url.startsWith(CANCEL_URI)) {
				Log.d(this.getClass().getName(), "cancelled");
				return true;
			} else if (url.contains(DISPLAY_STRING)) {
				Log.d(this.getClass().getName(), "display string");
				return false;
			}
			Log.d(this.getClass().getName(), "nothing");
			return false;
		}

	}

	public static String encodeUrl(Bundle parameters) {
		if (parameters == null) {
			return "";
		}
		StringBuilder sb = new StringBuilder();
		boolean first = true;
		for (String key : parameters.keySet()) {
			if (first) first = false; else sb.append("&");
			sb.append(key + "=" + parameters.getString(key));
		}
		return sb.toString();
	}

	public static Bundle parseUrl(String url) {
		// hack to prevent MalformedURLException
		url = url.replace("fbconnect", "http");
		try {
			URL u = new URL(url);
			Bundle b = decodeUrl(u.getQuery());
			b.putAll(decodeUrl(u.getRef()));
			return b;
		} catch (MalformedURLException e) {
			return new Bundle();
		}
	}

	public static Bundle decodeUrl(String s) {
		Bundle params = new Bundle();
		if (s != null) {
			String array[] = s.split("&");
			for (String parameter : array) {
				String v[] = parameter.split("=");
				params.putString(v[0], v[1]);
			}
		}
		return params;
	}

	public static String printBundle(Bundle b) {
		StringBuilder sb = new StringBuilder();
		boolean first = true;
		for (String key : b.keySet()) {
			if (first) first = false; else sb.append("\n");
			sb.append(key + "=" + b.getString(key));
		}
		return sb.toString();
	}

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        int i = item.getItemId();

        if (i == android.R.id.home) {
            finish();
        } else if (i == R.id.home) {
            finish();
        }

        return super.onOptionsItemSelected(item);
    }

	@Override
	protected String getScreenName() {
		return "Web View Facebook";
	}
}