2 * Copyright 2015-2016 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of 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.v4.app.DialogFragment;
34 import android.support.v7.app.ActionBar;
35 import android.support.v7.app.AppCompatActivity;
36 import android.support.v7.app.AppCompatDialogFragment;
37 import android.support.v7.widget.Toolbar;
38 import android.util.Patterns;
39 import android.view.KeyEvent;
40 import android.view.Menu;
41 import android.view.MenuItem;
42 import android.view.View;
43 import android.view.Window;
44 import android.view.inputmethod.InputMethodManager;
45 import android.webkit.CookieManager;
46 import android.webkit.DownloadListener;
47 import android.webkit.WebChromeClient;
48 import android.webkit.WebStorage;
49 import android.webkit.WebView;
50 import android.webkit.WebViewClient;
51 import android.widget.EditText;
52 import android.widget.FrameLayout;
53 import android.widget.ImageView;
54 import android.widget.ProgressBar;
55 import android.widget.Toast;
56 import java.io.UnsupportedEncodingException;
57 import java.net.MalformedURLException;
59 import java.net.URLEncoder;
61 // We need to use AppCompatActivity from android.support.v7.app.AppCompatActivity to have access to the SupportActionBar until the minimum API is >= 21.
62 public class MainWebViewActivity extends AppCompatActivity implements CreateHomeScreenShortcut.CreateHomeScreenSchortcutListener {
63 // favoriteIcon is public static so it can be accessed from CreateHomeScreenShortcut.
64 public static Bitmap favoriteIcon;
65 // mainWebView is public static so it can be accessed from AboutDialog. It is also used in onCreate(), onOptionsItemSelected(), and loadUrlFromTextBox().
66 public static WebView mainWebView;
68 // mainMenu is used in onCreateOptionsMenu() and onOptionsItemSelected().
69 private Menu mainMenu;
70 // formattedUrlString is used in onCreate(), onOptionsItemSelected(), onCreateHomeScreenShortcutCreate(), and loadUrlFromTextBox().
71 private String formattedUrlString;
72 // homepage is used in onCreate() and onOptionsItemSelected().
73 private String homepage;
74 // javaScriptEnabled is used in onCreate(), onCreateOptionsMenu(), onOptionsItemSelected(), and loadUrlFromTextBox().
75 private boolean javaScriptEnabled;
76 // domStorageEnabled is used in onCreate(), onCreateOptionsMenu(), and onOptionsItemSelected().
77 private boolean domStorageEnabled;
79 /* saveFormDataEnabled does nothing until database storage is implemented.
80 // saveFormDataEnabled is used in onCreate(), onCreateOptionsMenu(), and onOptionsItemSelected().
81 private boolean saveFormDataEnabled;
84 // cookieManager is used in onCreate() and onOptionsItemSelected().
85 private CookieManager cookieManager;
86 // cookiesEnabled is used in onCreate(), onCreateOptionsMenu(), and onOptionsItemSelected().
87 private boolean cookiesEnabled;
89 // urlTextBox is used in onCreate(), onOptionsItemSelected(), and loadUrlFromTextBox().
90 private EditText urlTextBox;
93 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
94 @SuppressLint("SetJavaScriptEnabled")
95 protected void onCreate(Bundle savedInstanceState) {
96 // Window.FEATURE_ACTION_BAR_OVERLAY must be enabled to set the app bar to HideOnContentScroll. It must be set before any content is added to the activity.
97 if (Build.VERSION.SDK_INT >= 11) {
98 requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
101 super.onCreate(savedInstanceState);
102 setContentView(R.layout.activity_webview);
104 // We need to use the SupportActionBar from android.support.v7.app.ActionBar until the minimum API is >= 21.
105 Toolbar supportAppBar = (Toolbar) findViewById(R.id.appBar);
106 setSupportActionBar(supportAppBar);
108 final FrameLayout fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.fullScreenVideoFrameLayout);
109 final Activity mainWebViewActivity = this;
110 // We need to use the SupportActionBar from android.support.v7.app.ActionBar until the minimum API is >= 21.
111 final ActionBar appBar = getSupportActionBar();
113 mainWebView = (WebView) findViewById(R.id.mainWebView);
115 if (appBar != null) {
116 /* TODO Enable app bar scrolling.
117 // Scroll the app bar, but only if the API supports overlay mode (>= 11).
118 if (Build.VERSION.SDK_INT >= 11) {
119 appBar.setHideOnContentScrollEnabled(true);
123 // Remove the title from the app bar.
124 appBar.setDisplayShowTitleEnabled(false);
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 /* These errors do not provide any useful information and clutter the screen.
161 public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
162 Toast.makeText(mainWebViewActivity, "Error loading " + request + " Error: " + error, Toast.LENGTH_SHORT).show();
166 // Update the URL in urlTextBox when the page starts to load.
168 public void onPageStarted(WebView view, String url, Bitmap favicon) {
169 urlTextBox.setText(url);
172 // Update formattedUrlString and urlTextBox. It is necessary to do this after the page finishes loading because the final URL can change during load.
174 public void onPageFinished(WebView view, String url) {
175 formattedUrlString = url;
176 urlTextBox.setText(formattedUrlString);
180 mainWebView.setWebChromeClient(new WebChromeClient() {
181 // Update the progress bar when a page is loading.
183 public void onProgressChanged(WebView view, int progress) {
184 // Make sure that appBar is not null.
185 if (appBar != null) {
186 ProgressBar progressBar = (ProgressBar) appBar.getCustomView().findViewById(R.id.progressBar);
187 progressBar.setProgress(progress);
188 if (progress < 100) {
189 progressBar.setVisibility(View.VISIBLE);
191 progressBar.setVisibility(View.GONE);
196 // Set the favorite icon when it changes.
198 public void onReceivedIcon(WebView view, Bitmap icon) {
199 // Save a copy of the favorite icon for use if a shortcut is added to the home screen.
202 // Place the favorite icon in the appBar if it is not null.
203 if (appBar != null) {
204 ImageView imageViewFavoriteIcon = (ImageView) appBar.getCustomView().findViewById(R.id.favoriteIcon);
205 imageViewFavoriteIcon.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
209 // Enter full screen video
211 public void onShowCustomView(View view, CustomViewCallback callback) {
212 if (appBar != null) {
216 fullScreenVideoFrameLayout.addView(view);
217 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
219 mainWebView.setVisibility(View.GONE);
221 /* SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bars on the bottom or right of the screen.
222 ** SYSTEM_UI_FLAG_FULLSCREEN hides the status bar across the top of the screen.
223 ** SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the navigation and status bars ghosted overlays and automatically rehides them.
226 // Set the one flag supported by API >= 14.
227 if (Build.VERSION.SDK_INT >= 14) {
228 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
231 // Set the two flags that are supported by API >= 16.
232 if (Build.VERSION.SDK_INT >= 16) {
233 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN);
236 // Set all three flags that are supported by API >= 19.
237 if (Build.VERSION.SDK_INT >= 19) {
238 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
242 // Exit full screen video
243 public void onHideCustomView() {
244 if (appBar != null) {
248 mainWebView.setVisibility(View.VISIBLE);
250 fullScreenVideoFrameLayout.removeAllViews();
251 fullScreenVideoFrameLayout.setVisibility(View.GONE);
255 // Allow the downloading of files.
256 mainWebView.setDownloadListener(new DownloadListener() {
257 // Launch the Android download manager when a link leads to a download.
259 public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
260 DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
261 DownloadManager.Request requestUri = new DownloadManager.Request(Uri.parse(url));
263 // Add the URL as the description for the download.
264 requestUri.setDescription(url);
266 // Show the download notification after the download is completed if the API is 11 or greater.
267 if (Build.VERSION.SDK_INT >= 11) {
268 requestUri.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
271 downloadManager.enqueue(requestUri);
272 Toast.makeText(mainWebViewActivity, "Download started", Toast.LENGTH_SHORT).show();
276 // Allow pinch to zoom.
277 mainWebView.getSettings().setBuiltInZoomControls(true);
279 // Hide zoom controls if the API is 11 or greater.
280 if (Build.VERSION.SDK_INT >= 11) {
281 mainWebView.getSettings().setDisplayZoomControls(false);
284 // Initialize the default preference values the first time the program is run.
285 PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
287 // Get the shared preference values.
288 SharedPreferences savedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
290 // Set JavaScript initial status.
291 javaScriptEnabled = savedPreferences.getBoolean("javascript_enabled", false);
292 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
294 // Set DOM storage initial status.
295 domStorageEnabled = savedPreferences.getBoolean("dom_storage_enabled", false);
296 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
298 /* Save Form Data does nothing until database storage is implemented.
299 // Set Save Form Data initial status.
300 saveFormDataEnabled = true;
301 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
304 // Set cookies initial status.
305 cookiesEnabled = savedPreferences.getBoolean("cookies_enabled", false);
306 cookieManager = CookieManager.getInstance();
307 cookieManager.setAcceptCookie(cookiesEnabled);
309 // Set hompage initial status.
310 homepage = savedPreferences.getString("homepage", "https://www.duckduckgo.com");
312 // Get the intent information that started the app.
313 final Intent intent = getIntent();
315 if (intent.getData() != null) {
316 // Get the intent data and convert it to a string.
317 final Uri intentUriData = intent.getData();
318 formattedUrlString = intentUriData.toString();
321 // If formattedUrlString is null assign the homepage to it.
322 if (formattedUrlString == null) {
323 formattedUrlString = homepage;
326 // Load the initial website.
327 mainWebView.loadUrl(formattedUrlString);
331 protected void onNewIntent(Intent intent) {
332 // Sets the new intent as the activity intent, so that any future getIntent()s pick up this one instead of creating a new activity.
335 if (intent.getData() != null) {
336 // Get the intent data and convert it to a string.
337 final Uri intentUriData = intent.getData();
338 formattedUrlString = intentUriData.toString();
342 mainWebView.loadUrl(formattedUrlString);
346 public boolean onCreateOptionsMenu(Menu menu) {
347 // Inflate the menu; this adds items to the action bar if it is present.
348 getMenuInflater().inflate(R.menu.menu_webview, menu);
350 // Set mainMenu so it can be used by onOptionsItemSelected.
353 // Get MenuItems for checkable menu items.
354 MenuItem toggleJavaScript = menu.findItem(R.id.toggleJavaScript);
355 MenuItem toggleDomStorage = menu.findItem(R.id.toggleDomStorage);
356 /* toggleSaveFormData does nothing until database storage is implemented.
357 MenuItem toggleSaveFormData = menu.findItem(R.id.toggleSaveFormData);
359 MenuItem toggleCookies = menu.findItem(R.id.toggleCookies);
361 // Set the initial icon for toggleJavaScript
362 if (javaScriptEnabled) {
363 toggleJavaScript.setIcon(R.drawable.javascript_enabled);
365 if (domStorageEnabled || cookiesEnabled) {
366 toggleJavaScript.setIcon(R.drawable.warning);
368 toggleJavaScript.setIcon(R.drawable.privacy_mode);
372 // Set the initial status of the menu item checkboxes.
373 toggleDomStorage.setChecked(domStorageEnabled);
374 /* toggleSaveFormData does nothing until database storage is implemented.
375 toggleSaveFormData.setChecked(saveFormDataEnabled);
377 toggleCookies.setChecked(cookiesEnabled);
383 public boolean onPrepareOptionsMenu(Menu menu) {
384 // Enable Clear Cookies if there are any.
385 MenuItem clearCookies = menu.findItem(R.id.clearCookies);
386 clearCookies.setEnabled(cookieManager.hasCookies());
388 // Enable Back if canGoBack().
389 MenuItem back = menu.findItem(R.id.back);
390 back.setEnabled(mainWebView.canGoBack());
392 // Enable forward if canGoForward().
393 MenuItem forward = menu.findItem(R.id.forward);
394 forward.setEnabled(mainWebView.canGoForward());
396 // Run all the other default commands.
397 super.onPrepareOptionsMenu(menu);
399 // return true displays the menu.
404 // @TargetApi(11) turns off the errors regarding copy and paste, which are removed from view in menu_webview.xml for lower version of Android.
406 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
407 @SuppressLint("SetJavaScriptEnabled")
408 // removeAllCookies is deprecated, but it is required for API < 21.
409 @SuppressWarnings("deprecation")
410 public boolean onOptionsItemSelected(MenuItem menuItem) {
411 int menuItemId = menuItem.getItemId();
413 // Some options need to update the drawable for toggleJavaScript.
414 MenuItem toggleJavaScript = mainMenu.findItem(R.id.toggleJavaScript);
416 // Set the commands that relate to the menu entries.
417 switch (menuItemId) {
418 case R.id.toggleJavaScript:
419 if (javaScriptEnabled) {
420 javaScriptEnabled = false;
421 mainWebView.getSettings().setJavaScriptEnabled(false);
422 mainWebView.reload();
424 // Update the toggleJavaScript icon and display a toast message.
425 if (domStorageEnabled || cookiesEnabled) {
426 menuItem.setIcon(R.drawable.warning);
427 if (domStorageEnabled && cookiesEnabled) {
428 Toast.makeText(getApplicationContext(), "JavaScript disabled, DOM Storage and Cookies still enabled", Toast.LENGTH_SHORT).show();
430 if (domStorageEnabled) {
431 Toast.makeText(getApplicationContext(), "JavaScript disabled, DOM Storage still enabled", Toast.LENGTH_SHORT).show();
433 Toast.makeText(getApplicationContext(), "JavaScript disabled, Cookies still enabled", Toast.LENGTH_SHORT).show();
437 menuItem.setIcon(R.drawable.privacy_mode);
438 Toast.makeText(getApplicationContext(), "Privacy Mode", Toast.LENGTH_SHORT).show();
441 javaScriptEnabled = true;
442 menuItem.setIcon(R.drawable.javascript_enabled);
443 mainWebView.getSettings().setJavaScriptEnabled(true);
444 mainWebView.reload();
445 Toast.makeText(getApplicationContext(), "JavaScript enabled", Toast.LENGTH_SHORT).show();
449 case R.id.toggleDomStorage:
450 if (domStorageEnabled) {
451 domStorageEnabled = false;
452 menuItem.setChecked(false);
453 mainWebView.getSettings().setDomStorageEnabled(false);
454 mainWebView.reload();
456 // Update the toggleJavaScript icon and display a toast message if appropriate.
457 if (!javaScriptEnabled && !cookiesEnabled) {
458 toggleJavaScript.setIcon(R.drawable.privacy_mode);
459 Toast.makeText(getApplicationContext(), "Privacy Mode", Toast.LENGTH_SHORT).show();
461 if (cookiesEnabled) {
462 toggleJavaScript.setIcon(R.drawable.warning);
463 Toast.makeText(getApplicationContext(), "Cookies still enabled", Toast.LENGTH_SHORT).show();
464 } // Else Do nothing because JavaScript is enabled.
467 domStorageEnabled = true;
468 menuItem.setChecked(true);
469 mainWebView.getSettings().setDomStorageEnabled(true);
470 mainWebView.reload();
472 // Update the toggleJavaScript icon if appropriate.
473 if (!javaScriptEnabled) {
474 toggleJavaScript.setIcon(R.drawable.warning);
475 } // Else Do nothing because JavaScript is enabled.
477 Toast.makeText(getApplicationContext(), "DOM Storage enabled", Toast.LENGTH_SHORT).show();
481 /* toggleSaveFormData does nothing until database storage is implemented.
482 case R.id.toggleSaveFormData:
483 if (saveFormDataEnabled) {
484 saveFormDataEnabled = false;
485 menuItem.setChecked(false);
486 mainWebView.getSettings().setSaveFormData(false);
487 mainWebView.reload();
489 saveFormDataEnabled = true;
490 menuItem.setChecked(true);
491 mainWebView.getSettings().setSaveFormData(true);
492 mainWebView.reload();
497 case R.id.toggleCookies:
498 if (cookiesEnabled) {
499 cookiesEnabled = false;
500 menuItem.setChecked(false);
501 cookieManager.setAcceptCookie(false);
502 mainWebView.reload();
504 // Update the toggleJavaScript icon and display a toast message if appropriate.
505 if (!javaScriptEnabled && !domStorageEnabled) {
506 toggleJavaScript.setIcon(R.drawable.privacy_mode);
507 Toast.makeText(getApplicationContext(), "Privacy Mode", Toast.LENGTH_SHORT).show();
509 if (domStorageEnabled) {
510 toggleJavaScript.setIcon(R.drawable.warning);
511 Toast.makeText(getApplicationContext(), "DOM Storage still enabled", Toast.LENGTH_SHORT).show();
512 } // Else Do nothing because JavaScript is enabled.
515 cookiesEnabled = true;
516 menuItem.setChecked(true);
517 cookieManager.setAcceptCookie(true);
518 mainWebView.reload();
520 // Update the toggleJavaScript icon if appropriate.
521 if (!javaScriptEnabled) {
522 toggleJavaScript.setIcon(R.drawable.warning);
523 } // Else Do nothing because JavaScript is enabled.
525 Toast.makeText(getApplicationContext(), "Cookies enabled", Toast.LENGTH_SHORT).show();
529 case R.id.clearDomStorage:
530 WebStorage webStorage = WebStorage.getInstance();
531 webStorage.deleteAllData();
532 Toast.makeText(getApplicationContext(), "DOM storage deleted", Toast.LENGTH_SHORT).show();
535 case R.id.clearCookies:
536 if (Build.VERSION.SDK_INT < 21) {
537 cookieManager.removeAllCookie();
539 cookieManager.removeAllCookies(null);
541 Toast.makeText(getApplicationContext(), "Cookies deleted", Toast.LENGTH_SHORT).show();
544 case R.id.addToHomescreen:
545 // Show the CreateHomeScreenShortcut AlertDialog and name this instance createShortcut.
546 AppCompatDialogFragment shortcutDialog = new CreateHomeScreenShortcut();
547 shortcutDialog.show(getSupportFragmentManager(), "createShortcut");
549 //Everything else will be handled by CreateHomeScreenShortcut and the associated listeners below.
553 // Launch the system Download Manager.
554 Intent downloadManangerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
556 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
557 downloadManangerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
559 startActivity(downloadManangerIntent);
563 mainWebView.loadUrl(homepage);
567 mainWebView.reload();
571 mainWebView.goBack();
575 mainWebView.goForward();
579 Intent shareIntent = new Intent();
580 shareIntent.setAction(Intent.ACTION_SEND);
581 shareIntent.putExtra(Intent.EXTRA_TEXT, urlTextBox.getText().toString());
582 shareIntent.setType("text/plain");
583 startActivity(Intent.createChooser(shareIntent, "Share URL"));
587 // Launch SettingsActivity.
588 Intent intent = new Intent(this, SettingsActivity.class);
589 startActivity(intent);
593 // Show the AboutDialog AlertDialog and name this instance aboutDialog.
594 AppCompatDialogFragment aboutDialog = new AboutDialog();
595 aboutDialog.show(getSupportFragmentManager(), "aboutDialog");
598 case R.id.clearAndExit:
599 // Clear DOM storage.
600 WebStorage domStorage = WebStorage.getInstance();
601 domStorage.deleteAllData();
603 // Clear cookies. The commands changed slightly in API 21.
604 if (Build.VERSION.SDK_INT >= 21) {
605 cookieManager.removeAllCookies(null);
607 cookieManager.removeAllCookie();
610 // Destroy the internal state of the webview.
611 mainWebView.destroy();
613 // Close Privacy Browser. finishAndRemoveTask also removes Privacy Browser from the recent app list.
614 if (Build.VERSION.SDK_INT >= 21) {
615 finishAndRemoveTask();
622 return super.onOptionsItemSelected(menuItem);
627 public void onCreateHomeScreenShortcutCancel(DialogFragment dialog) {
628 // Do nothing because the user selected "Cancel".
632 public void onCreateHomeScreenShortcutCreate(DialogFragment dialog) {
633 // Get shortcutNameEditText from the alert dialog.
634 EditText shortcutNameEditText = (EditText) dialog.getDialog().findViewById(R.id.shortcutNameEditText);
636 // Create the bookmark shortcut based on formattedUrlString.
637 Intent bookmarkShortcut = new Intent();
638 bookmarkShortcut.setAction(Intent.ACTION_VIEW);
639 bookmarkShortcut.setData(Uri.parse(formattedUrlString));
641 // Place the bookmark shortcut on the home screen.
642 Intent placeBookmarkShortcut = new Intent();
643 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
644 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
645 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIcon);
646 placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
647 sendBroadcast(placeBookmarkShortcut);
650 // Override onBackPressed so that if mainWebView can go back it does when the system back button is pressed.
652 public void onBackPressed() {
653 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
655 if (mainWebView.canGoBack()) {
656 mainWebView.goBack();
658 super.onBackPressed();
662 public void loadUrlFromTextBox() throws UnsupportedEncodingException {
663 // Get the text from urlTextBox and convert it to a string.
664 String unformattedUrlString = urlTextBox.getText().toString();
665 URL unformattedUrl = null;
666 Uri.Builder formattedUri = new Uri.Builder();
668 // Check to see if unformattedUrlString is a valid URL. Otherwise, convert it into a Duck Duck Go search.
669 if (Patterns.WEB_URL.matcher(unformattedUrlString).matches()) {
670 // Add http:// at the beginning if it is missing. Otherwise the app will segfault.
671 if (!unformattedUrlString.startsWith("http")) {
672 unformattedUrlString = "http://" + unformattedUrlString;
675 // 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.
677 unformattedUrl = new URL(unformattedUrlString);
678 } catch (MalformedURLException e) {
682 // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if .get was called on a null value.
683 final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
684 final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
685 final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
686 final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
687 final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
689 formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
690 formattedUrlString = formattedUri.build().toString();
692 // Sanitize the search input and convert it to a DuckDuckGo search.
693 final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
695 // Use the correct search URL based on javaScriptEnabled.
696 if (javaScriptEnabled) {
697 formattedUrlString = "https://duckduckgo.com/?q=" + encodedUrlString;
699 formattedUrlString = "https://duckduckgo.com/html/?q=" + encodedUrlString;
703 mainWebView.loadUrl(formattedUrlString);
705 // Hides the keyboard so we can see the webpage.
706 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
707 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);