2 * Copyright 2015-2016 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
6 * Privacy Browser is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * Privacy Browser is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Privacy Browser. If not, see <http://www.gnu.org/licenses/>.
20 package com.stoutner.privacybrowser;
22 import android.annotation.SuppressLint;
23 import android.annotation.TargetApi;
24 import android.app.Activity;
25 import android.app.DownloadManager;
26 import android.content.Intent;
27 import android.content.SharedPreferences;
28 import android.graphics.Bitmap;
29 import android.net.Uri;
30 import android.os.Build;
31 import android.os.Bundle;
32 import android.preference.PreferenceManager;
33 import android.support.design.widget.Snackbar;
34 import android.support.v4.app.DialogFragment;
35 import android.support.v4.widget.SwipeRefreshLayout;
36 import android.support.v7.app.ActionBar;
37 import android.support.v7.app.AppCompatActivity;
38 import android.support.v7.app.AppCompatDialogFragment;
39 import android.support.v7.widget.Toolbar;
40 import android.util.Patterns;
41 import android.view.KeyEvent;
42 import android.view.Menu;
43 import android.view.MenuItem;
44 import android.view.View;
45 import android.view.inputmethod.InputMethodManager;
46 import android.webkit.CookieManager;
47 import android.webkit.DownloadListener;
48 import android.webkit.WebChromeClient;
49 import android.webkit.WebStorage;
50 import android.webkit.WebView;
51 import android.webkit.WebViewClient;
52 import android.widget.EditText;
53 import android.widget.FrameLayout;
54 import android.widget.ImageView;
55 import android.widget.ProgressBar;
56 import android.widget.Toast;
58 import java.io.UnsupportedEncodingException;
59 import java.net.MalformedURLException;
61 import java.net.URLEncoder;
63 // We need to use AppCompatActivity from android.support.v7.app.AppCompatActivity to have access to the SupportActionBar until the minimum API is >= 21.
64 public class MainWebViewActivity extends AppCompatActivity implements CreateHomeScreenShortcut.CreateHomeScreenSchortcutListener {
65 // favoriteIcon is public static so it can be accessed from CreateHomeScreenShortcut.
66 public static Bitmap favoriteIcon;
67 // mainWebView is public static so it can be accessed from AboutDialog. It is also used in onCreate(), onOptionsItemSelected(), and loadUrlFromTextBox().
68 public static WebView mainWebView;
70 // mainMenu is used in onCreateOptionsMenu() and onOptionsItemSelected().
71 private Menu mainMenu;
72 // formattedUrlString is used in onCreate(), onOptionsItemSelected(), onCreateHomeScreenShortcutCreate(), and loadUrlFromTextBox().
73 private String formattedUrlString;
74 // homepage is used in onCreate() and onOptionsItemSelected().
75 private String homepage;
76 // javaScriptEnabled is used in onCreate(), onCreateOptionsMenu(), onOptionsItemSelected(), and loadUrlFromTextBox().
77 private boolean javaScriptEnabled;
78 // domStorageEnabled is used in onCreate(), onCreateOptionsMenu(), and onOptionsItemSelected().
79 private boolean domStorageEnabled;
81 /* saveFormDataEnabled does nothing until database storage is implemented.
82 // saveFormDataEnabled is used in onCreate(), onCreateOptionsMenu(), and onOptionsItemSelected().
83 private boolean saveFormDataEnabled;
86 // cookieManager is used in onCreate() and onOptionsItemSelected().
87 private CookieManager cookieManager;
88 // cookiesEnabled is used in onCreate(), onCreateOptionsMenu(), and onOptionsItemSelected().
89 private boolean cookiesEnabled;
91 // urlTextBox is used in onCreate(), onOptionsItemSelected(), and loadUrlFromTextBox().
92 private EditText urlTextBox;
95 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled. The whole premise of Privacy Browser is built around an understanding of these dangers.
96 @SuppressLint("SetJavaScriptEnabled")
97 protected void onCreate(Bundle savedInstanceState) {
98 super.onCreate(savedInstanceState);
99 setContentView(R.layout.activity_webview);
101 // We need to use the SupportActionBar from android.support.v7.app.ActionBar until the minimum API is >= 21.
102 Toolbar supportAppBar = (Toolbar) findViewById(R.id.appBar);
103 setSupportActionBar(supportAppBar);
105 final FrameLayout fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.fullScreenVideoFrameLayout);
107 // We need to use the SupportActionBar from android.support.v7.app.ActionBar until the minimum API is >= 21.
108 final ActionBar appBar = getSupportActionBar();
110 // Setup AdView for the free flavor.
111 final View adView = findViewById(R.id.adView);
113 // Implement swipe to refresh
114 final SwipeRefreshLayout swipeToRefresh = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);
115 swipeToRefresh.setColorSchemeResources(R.color.blue);
116 swipeToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
118 public void onRefresh() {
119 mainWebView.reload();
123 mainWebView = (WebView) findViewById(R.id.mainWebView);
125 if (appBar != null) {
126 // Add the custom url_bar layout, which shows the favoriteIcon, urlTextBar, and progressBar.
127 appBar.setCustomView(R.layout.url_bar);
128 appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
130 // Set the "go" button on the keyboard to load the URL in urlTextBox.
131 urlTextBox = (EditText) appBar.getCustomView().findViewById(R.id.urlTextBox);
132 urlTextBox.setOnKeyListener(new View.OnKeyListener() {
133 public boolean onKey(View v, int keyCode, KeyEvent event) {
134 // If the event is a key-down event on the "enter" button, load the URL.
135 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
136 // Load the URL into the mainWebView and consume the event.
138 loadUrlFromTextBox();
139 } catch (UnsupportedEncodingException e) {
142 // If the enter key was pressed, consume the event.
145 // If any other key was pressed, do not consume the event.
152 mainWebView.setWebViewClient(new WebViewClient() {
153 // shouldOverrideUrlLoading makes this WebView the default handler for URLs inside the app, so that links are not kicked out to other apps.
155 public boolean shouldOverrideUrlLoading(WebView view, String url) {
156 mainWebView.loadUrl(url);
160 // Update the URL in urlTextBox when the page starts to load.
162 public void onPageStarted(WebView view, String url, Bitmap favicon) {
163 urlTextBox.setText(url);
166 // Update formattedUrlString and urlTextBox. It is necessary to do this after the page finishes loading because the final URL can change during load.
168 public void onPageFinished(WebView view, String url) {
169 formattedUrlString = url;
171 // Only update urlTextBox if the user is not typing in it.
172 if (!urlTextBox.hasFocus()) {
173 urlTextBox.setText(formattedUrlString);
178 mainWebView.setWebChromeClient(new WebChromeClient() {
179 // Update the progress bar when a page is loading.
181 public void onProgressChanged(WebView view, int progress) {
182 // Make sure that appBar is not null.
183 if (appBar != null) {
184 ProgressBar progressBar = (ProgressBar) appBar.getCustomView().findViewById(R.id.progressBar);
185 progressBar.setProgress(progress);
186 if (progress < 100) {
187 progressBar.setVisibility(View.VISIBLE);
189 progressBar.setVisibility(View.GONE);
191 //Stop the SwipeToRefresh indicator if it is running
192 swipeToRefresh.setRefreshing(false);
197 // Set the favorite icon when it changes.
199 public void onReceivedIcon(WebView view, Bitmap icon) {
200 // Save a copy of the favorite icon for use if a shortcut is added to the home screen.
203 // Place the favorite icon in the appBar if it is not null.
204 if (appBar != null) {
205 ImageView imageViewFavoriteIcon = (ImageView) appBar.getCustomView().findViewById(R.id.favoriteIcon);
206 imageViewFavoriteIcon.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
210 // Enter full screen video
212 public void onShowCustomView(View view, CustomViewCallback callback) {
213 if (appBar != null) {
217 // Show the fullScreenVideoFrameLayout.
218 fullScreenVideoFrameLayout.addView(view);
219 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
221 // Hide the mainWebView.
222 mainWebView.setVisibility(View.GONE);
224 // Hide the ad if this is the free flavor.
225 BannerAd.hideAd(adView);
227 /* SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bars on the bottom or right of the screen.
228 ** SYSTEM_UI_FLAG_FULLSCREEN hides the status bar across the top of the screen.
229 ** SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the navigation and status bars ghosted overlays and automatically rehides them.
232 // Set the one flag supported by API >= 14.
233 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
235 // Set the two flags that are supported by API >= 16.
236 if (Build.VERSION.SDK_INT >= 16) {
237 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN);
240 // Set all three flags that are supported by API >= 19.
241 if (Build.VERSION.SDK_INT >= 19) {
242 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
246 // Exit full screen video
247 public void onHideCustomView() {
248 if (appBar != null) {
252 // Show the mainWebView.
253 mainWebView.setVisibility(View.VISIBLE);
255 // Show the ad if this is the free flavor.
256 BannerAd.showAd(adView);
258 // Hide the fullScreenVideoFrameLayout.
259 fullScreenVideoFrameLayout.removeAllViews();
260 fullScreenVideoFrameLayout.setVisibility(View.GONE);
264 // Allow the downloading of files.
265 mainWebView.setDownloadListener(new DownloadListener() {
266 // Launch the Android download manager when a link leads to a download.
268 public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
269 DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
270 DownloadManager.Request requestUri = new DownloadManager.Request(Uri.parse(url));
272 // Add the URL as the description for the download.
273 requestUri.setDescription(url);
275 // Show the download notification after the download is completed.
276 requestUri.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
278 // Initiate the download and display a Snackbar.
279 downloadManager.enqueue(requestUri);
280 Snackbar.make(findViewById(R.id.mainWebView), R.string.download_started, Snackbar.LENGTH_SHORT).show();
284 // Allow pinch to zoom.
285 mainWebView.getSettings().setBuiltInZoomControls(true);
287 // Hide zoom controls.
288 mainWebView.getSettings().setDisplayZoomControls(false);
290 // Initialize the default preference values the first time the program is run.
291 PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
293 // Get the shared preference values.
294 SharedPreferences savedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
296 // Set JavaScript initial status.
297 javaScriptEnabled = savedPreferences.getBoolean("javascript_enabled", false);
298 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
300 // Set DOM storage initial status.
301 domStorageEnabled = savedPreferences.getBoolean("dom_storage_enabled", false);
302 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
304 /* Save Form Data does nothing until database storage is implemented.
305 // Set Save Form Data initial status.
306 saveFormDataEnabled = true;
307 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
310 // Set cookies initial status.
311 cookiesEnabled = savedPreferences.getBoolean("cookies_enabled", false);
312 cookieManager = CookieManager.getInstance();
313 cookieManager.setAcceptCookie(cookiesEnabled);
315 // Set homepage initial status.
316 homepage = savedPreferences.getString("homepage", "https://www.duckduckgo.com");
318 // Get the intent information that started the app.
319 final Intent intent = getIntent();
321 if (intent.getData() != null) {
322 // Get the intent data and convert it to a string.
323 final Uri intentUriData = intent.getData();
324 formattedUrlString = intentUriData.toString();
327 // If formattedUrlString is null assign the homepage to it.
328 if (formattedUrlString == null) {
329 formattedUrlString = homepage;
332 // Load the initial website.
333 mainWebView.loadUrl(formattedUrlString);
335 // Load the ad if this is the free flavor.
336 BannerAd.requestAd(adView);
340 protected void onNewIntent(Intent intent) {
341 // Sets the new intent as the activity intent, so that any future getIntent()s pick up this one instead of creating a new activity.
344 if (intent.getData() != null) {
345 // Get the intent data and convert it to a string.
346 final Uri intentUriData = intent.getData();
347 formattedUrlString = intentUriData.toString();
351 mainWebView.loadUrl(formattedUrlString);
353 // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
354 mainWebView.requestFocus();
358 public boolean onCreateOptionsMenu(Menu menu) {
359 // Inflate the menu; this adds items to the action bar if it is present.
360 getMenuInflater().inflate(R.menu.menu_webview, menu);
362 // Set mainMenu so it can be used by onOptionsItemSelected.
365 // Get MenuItems for checkable menu items.
366 MenuItem toggleJavaScript = menu.findItem(R.id.toggleJavaScript);
367 MenuItem toggleDomStorage = menu.findItem(R.id.toggleDomStorage);
368 /* toggleSaveFormData does nothing until database storage is implemented.
369 MenuItem toggleSaveFormData = menu.findItem(R.id.toggleSaveFormData);
371 MenuItem toggleCookies = menu.findItem(R.id.toggleCookies);
373 // Set the initial icon for toggleJavaScript
374 if (javaScriptEnabled) {
375 toggleJavaScript.setIcon(R.drawable.javascript_enabled);
377 if (domStorageEnabled || cookiesEnabled) {
378 toggleJavaScript.setIcon(R.drawable.warning);
380 toggleJavaScript.setIcon(R.drawable.privacy_mode);
384 // Set the initial status of the menu item checkboxes.
385 toggleDomStorage.setChecked(domStorageEnabled);
386 /* toggleSaveFormData does nothing until database storage is implemented.
387 toggleSaveFormData.setChecked(saveFormDataEnabled);
389 toggleCookies.setChecked(cookiesEnabled);
395 public boolean onPrepareOptionsMenu(Menu menu) {
396 // Enable Clear Cookies if there are any.
397 MenuItem clearCookies = menu.findItem(R.id.clearCookies);
398 clearCookies.setEnabled(cookieManager.hasCookies());
400 // Enable Back if canGoBack().
401 MenuItem back = menu.findItem(R.id.back);
402 back.setEnabled(mainWebView.canGoBack());
404 // Enable forward if canGoForward().
405 MenuItem forward = menu.findItem(R.id.forward);
406 forward.setEnabled(mainWebView.canGoForward());
408 // Run all the other default commands.
409 super.onPrepareOptionsMenu(menu);
411 // return true displays the menu.
416 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
417 @SuppressLint("SetJavaScriptEnabled")
418 // removeAllCookies is deprecated, but it is required for API < 21.
419 @SuppressWarnings("deprecation")
420 public boolean onOptionsItemSelected(MenuItem menuItem) {
421 int menuItemId = menuItem.getItemId();
423 // Some options need to update the drawable for toggleJavaScript.
424 MenuItem toggleJavaScript = mainMenu.findItem(R.id.toggleJavaScript);
426 // Set the commands that relate to the menu entries.
427 switch (menuItemId) {
428 case R.id.toggleJavaScript:
429 if (javaScriptEnabled) {
430 javaScriptEnabled = false;
431 mainWebView.getSettings().setJavaScriptEnabled(false);
432 mainWebView.reload();
434 // Update the toggleJavaScript icon and display a snackbar.
435 if (domStorageEnabled || cookiesEnabled) {
436 menuItem.setIcon(R.drawable.warning);
437 if (domStorageEnabled && cookiesEnabled) {
438 Snackbar.make(findViewById(R.id.mainWebView), R.string.both_still_enabled, Snackbar.LENGTH_SHORT).show();
440 if (domStorageEnabled) {
441 Snackbar.make(findViewById(R.id.mainWebView), R.string.dom_storage_still_enabled, Snackbar.LENGTH_SHORT).show();
443 Snackbar.make(findViewById(R.id.mainWebView), R.string.cookies_still_enabled, Snackbar.LENGTH_SHORT).show();
447 menuItem.setIcon(R.drawable.privacy_mode);
448 Snackbar.make(findViewById(R.id.mainWebView), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
451 javaScriptEnabled = true;
452 menuItem.setIcon(R.drawable.javascript_enabled);
453 mainWebView.getSettings().setJavaScriptEnabled(true);
454 mainWebView.reload();
455 Snackbar.make(findViewById(R.id.mainWebView), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
459 case R.id.toggleDomStorage:
460 if (domStorageEnabled) {
461 domStorageEnabled = false;
462 menuItem.setChecked(false);
463 mainWebView.getSettings().setDomStorageEnabled(false);
464 mainWebView.reload();
466 // Update the toggleJavaScript icon and display a snackbar if appropriate.
467 if (!javaScriptEnabled && !cookiesEnabled) {
468 toggleJavaScript.setIcon(R.drawable.privacy_mode);
469 Snackbar.make(findViewById(R.id.mainWebView), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
471 if (cookiesEnabled) {
472 toggleJavaScript.setIcon(R.drawable.warning);
473 Snackbar.make(findViewById(R.id.mainWebView), R.string.cookies_still_enabled, Snackbar.LENGTH_SHORT).show();
474 } // Else Do nothing because JavaScript is enabled.
477 domStorageEnabled = true;
478 menuItem.setChecked(true);
479 mainWebView.getSettings().setDomStorageEnabled(true);
480 mainWebView.reload();
482 // Update the toggleJavaScript icon if appropriate.
483 if (!javaScriptEnabled) {
484 toggleJavaScript.setIcon(R.drawable.warning);
485 } // Else Do nothing because JavaScript is enabled.
487 Snackbar.make(findViewById(R.id.mainWebView), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
491 /* toggleSaveFormData does nothing until database storage is implemented.
492 case R.id.toggleSaveFormData:
493 if (saveFormDataEnabled) {
494 saveFormDataEnabled = false;
495 menuItem.setChecked(false);
496 mainWebView.getSettings().setSaveFormData(false);
497 mainWebView.reload();
499 saveFormDataEnabled = true;
500 menuItem.setChecked(true);
501 mainWebView.getSettings().setSaveFormData(true);
502 mainWebView.reload();
507 case R.id.toggleCookies:
508 if (cookiesEnabled) {
509 cookiesEnabled = false;
510 menuItem.setChecked(false);
511 cookieManager.setAcceptCookie(false);
512 mainWebView.reload();
514 // Update the toggleJavaScript icon and display a snackbar if appropriate.
515 if (!javaScriptEnabled && !domStorageEnabled) {
516 toggleJavaScript.setIcon(R.drawable.privacy_mode);
517 Snackbar.make(findViewById(R.id.mainWebView), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
519 if (domStorageEnabled) {
520 toggleJavaScript.setIcon(R.drawable.warning);
521 Snackbar.make(findViewById(R.id.mainWebView), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
522 } // Else Do nothing because JavaScript is enabled.
525 cookiesEnabled = true;
526 menuItem.setChecked(true);
527 cookieManager.setAcceptCookie(true);
528 mainWebView.reload();
530 // Update the toggleJavaScript icon if appropriate.
531 if (!javaScriptEnabled) {
532 toggleJavaScript.setIcon(R.drawable.warning);
533 } // Else Do nothing because JavaScript is enabled.
535 Snackbar.make(findViewById(R.id.mainWebView), R.string.cookies_enabled, Snackbar.LENGTH_SHORT).show();
539 case R.id.clearDomStorage:
540 WebStorage webStorage = WebStorage.getInstance();
541 webStorage.deleteAllData();
542 Snackbar.make(findViewById(R.id.mainWebView), R.string.dom_storage_deleted, Snackbar.LENGTH_SHORT).show();
545 case R.id.clearCookies:
546 if (Build.VERSION.SDK_INT < 21) {
547 cookieManager.removeAllCookie();
549 cookieManager.removeAllCookies(null);
551 Snackbar.make(findViewById(R.id.mainWebView), R.string.cookies_deleted, Snackbar.LENGTH_SHORT).show();
554 case R.id.addToHomescreen:
555 // Show the CreateHomeScreenShortcut AlertDialog and name this instance createShortcut.
556 AppCompatDialogFragment shortcutDialog = new CreateHomeScreenShortcut();
557 shortcutDialog.show(getSupportFragmentManager(), "createShortcut");
559 //Everything else will be handled by CreateHomeScreenShortcut and the associated listeners below.
563 // Launch the system Download Manager.
564 Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
566 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
567 downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
569 startActivity(downloadManagerIntent);
573 mainWebView.loadUrl(homepage);
577 mainWebView.goBack();
581 mainWebView.goForward();
585 Intent shareIntent = new Intent();
586 shareIntent.setAction(Intent.ACTION_SEND);
587 shareIntent.putExtra(Intent.EXTRA_TEXT, urlTextBox.getText().toString());
588 shareIntent.setType("text/plain");
589 startActivity(Intent.createChooser(shareIntent, "Share URL"));
593 // Launch SettingsActivity.
594 Intent intent = new Intent(this, SettingsActivity.class);
595 startActivity(intent);
599 // Show the AboutDialog AlertDialog and name this instance aboutDialog.
600 AppCompatDialogFragment aboutDialog = new AboutDialog();
601 aboutDialog.show(getSupportFragmentManager(), "aboutDialog");
604 case R.id.clearAndExit:
605 // Clear DOM storage.
606 WebStorage domStorage = WebStorage.getInstance();
607 domStorage.deleteAllData();
609 // Clear cookies. The commands changed slightly in API 21.
610 if (Build.VERSION.SDK_INT >= 21) {
611 cookieManager.removeAllCookies(null);
613 cookieManager.removeAllCookie();
616 // Destroy the internal state of the webview.
617 mainWebView.destroy();
619 // Close Privacy Browser. finishAndRemoveTask also removes Privacy Browser from the recent app list.
620 if (Build.VERSION.SDK_INT >= 21) {
621 finishAndRemoveTask();
628 return super.onOptionsItemSelected(menuItem);
633 public void onCreateHomeScreenShortcutCancel(DialogFragment dialog) {
634 // Do nothing because the user selected "Cancel".
638 public void onCreateHomeScreenShortcutCreate(DialogFragment dialog) {
639 // Get shortcutNameEditText from the alert dialog.
640 EditText shortcutNameEditText = (EditText) dialog.getDialog().findViewById(R.id.shortcutNameEditText);
642 // Create the bookmark shortcut based on formattedUrlString.
643 Intent bookmarkShortcut = new Intent();
644 bookmarkShortcut.setAction(Intent.ACTION_VIEW);
645 bookmarkShortcut.setData(Uri.parse(formattedUrlString));
647 // Place the bookmark shortcut on the home screen.
648 Intent placeBookmarkShortcut = new Intent();
649 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
650 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
651 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIcon);
652 placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
653 sendBroadcast(placeBookmarkShortcut);
656 // Override onBackPressed so that if mainWebView can go back it does when the system back button is pressed.
658 public void onBackPressed() {
659 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
661 if (mainWebView.canGoBack()) {
662 mainWebView.goBack();
664 super.onBackPressed();
668 private void loadUrlFromTextBox() throws UnsupportedEncodingException {
669 // Get the text from urlTextBox and convert it to a string.
670 String unformattedUrlString = urlTextBox.getText().toString();
671 URL unformattedUrl = null;
672 Uri.Builder formattedUri = new Uri.Builder();
674 // Check to see if unformattedUrlString is a valid URL. Otherwise, convert it into a Duck Duck Go search.
675 if (Patterns.WEB_URL.matcher(unformattedUrlString).matches()) {
676 // Add http:// at the beginning if it is missing. Otherwise the app will segfault.
677 if (!unformattedUrlString.startsWith("http")) {
678 unformattedUrlString = "http://" + unformattedUrlString;
681 // Convert unformattedUrlString to a URL, then to a URI, and then back to a string, which sanitizes the input and adds in any missing components.
683 unformattedUrl = new URL(unformattedUrlString);
684 } catch (MalformedURLException e) {
688 // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if .get was called on a null value.
689 final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
690 final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
691 final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
692 final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
693 final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
695 formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
696 formattedUrlString = formattedUri.build().toString();
698 // Sanitize the search input and convert it to a DuckDuckGo search.
699 final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
701 // Use the correct search URL based on javaScriptEnabled.
702 if (javaScriptEnabled) {
703 formattedUrlString = "https://duckduckgo.com/?q=" + encodedUrlString;
705 formattedUrlString = "https://duckduckgo.com/html/?q=" + encodedUrlString;
709 mainWebView.loadUrl(formattedUrlString);
711 // Hides the keyboard so we can see the webpage.
712 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
713 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);