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;
170 urlTextBox.setText(formattedUrlString);
174 mainWebView.setWebChromeClient(new WebChromeClient() {
175 // Update the progress bar when a page is loading.
177 public void onProgressChanged(WebView view, int progress) {
178 // Make sure that appBar is not null.
179 if (appBar != null) {
180 ProgressBar progressBar = (ProgressBar) appBar.getCustomView().findViewById(R.id.progressBar);
181 progressBar.setProgress(progress);
182 if (progress < 100) {
183 progressBar.setVisibility(View.VISIBLE);
185 progressBar.setVisibility(View.GONE);
187 //Stop the SwipeToRefresh indicator if it is running
188 swipeToRefresh.setRefreshing(false);
193 // Set the favorite icon when it changes.
195 public void onReceivedIcon(WebView view, Bitmap icon) {
196 // Save a copy of the favorite icon for use if a shortcut is added to the home screen.
199 // Place the favorite icon in the appBar if it is not null.
200 if (appBar != null) {
201 ImageView imageViewFavoriteIcon = (ImageView) appBar.getCustomView().findViewById(R.id.favoriteIcon);
202 imageViewFavoriteIcon.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
206 // Enter full screen video
208 public void onShowCustomView(View view, CustomViewCallback callback) {
209 if (appBar != null) {
213 // Show the fullScreenVideoFrameLayout.
214 fullScreenVideoFrameLayout.addView(view);
215 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
217 // Hide the mainWebView.
218 mainWebView.setVisibility(View.GONE);
220 // Hide the ad if this is the free flavor.
221 BannerAd.hideAd(adView);
223 /* SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bars on the bottom or right of the screen.
224 ** SYSTEM_UI_FLAG_FULLSCREEN hides the status bar across the top of the screen.
225 ** SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the navigation and status bars ghosted overlays and automatically rehides them.
228 // Set the one flag supported by API >= 14.
229 if (Build.VERSION.SDK_INT >= 14) {
230 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
233 // Set the two flags that are supported by API >= 16.
234 if (Build.VERSION.SDK_INT >= 16) {
235 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN);
238 // Set all three flags that are supported by API >= 19.
239 if (Build.VERSION.SDK_INT >= 19) {
240 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
244 // Exit full screen video
245 public void onHideCustomView() {
246 if (appBar != null) {
250 // Show the mainWebView.
251 mainWebView.setVisibility(View.VISIBLE);
253 // Show the ad if this is the free flavor.
254 BannerAd.showAd(adView);
256 // Hide the fullScreenVideoFrameLayout.
257 fullScreenVideoFrameLayout.removeAllViews();
258 fullScreenVideoFrameLayout.setVisibility(View.GONE);
262 // Allow the downloading of files.
263 mainWebView.setDownloadListener(new DownloadListener() {
264 // Launch the Android download manager when a link leads to a download.
266 public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
267 DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
268 DownloadManager.Request requestUri = new DownloadManager.Request(Uri.parse(url));
270 // Add the URL as the description for the download.
271 requestUri.setDescription(url);
273 // Show the download notification after the download is completed if the API is 11 or greater.
274 if (Build.VERSION.SDK_INT >= 11) {
275 requestUri.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
278 downloadManager.enqueue(requestUri);
279 Snackbar.make(findViewById(R.id.mainWebView), R.string.download_started, Snackbar.LENGTH_SHORT).show();
283 // Allow pinch to zoom.
284 mainWebView.getSettings().setBuiltInZoomControls(true);
286 // Hide zoom controls if the API is 11 or greater.
287 if (Build.VERSION.SDK_INT >= 11) {
288 mainWebView.getSettings().setDisplayZoomControls(false);
291 // Initialize the default preference values the first time the program is run.
292 PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
294 // Get the shared preference values.
295 SharedPreferences savedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
297 // Set JavaScript initial status.
298 javaScriptEnabled = savedPreferences.getBoolean("javascript_enabled", false);
299 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
301 // Set DOM storage initial status.
302 domStorageEnabled = savedPreferences.getBoolean("dom_storage_enabled", false);
303 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
305 /* Save Form Data does nothing until database storage is implemented.
306 // Set Save Form Data initial status.
307 saveFormDataEnabled = true;
308 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
311 // Set cookies initial status.
312 cookiesEnabled = savedPreferences.getBoolean("cookies_enabled", false);
313 cookieManager = CookieManager.getInstance();
314 cookieManager.setAcceptCookie(cookiesEnabled);
316 // Set homepage initial status.
317 homepage = savedPreferences.getString("homepage", "https://www.duckduckgo.com");
319 // Get the intent information that started the app.
320 final Intent intent = getIntent();
322 if (intent.getData() != null) {
323 // Get the intent data and convert it to a string.
324 final Uri intentUriData = intent.getData();
325 formattedUrlString = intentUriData.toString();
328 // If formattedUrlString is null assign the homepage to it.
329 if (formattedUrlString == null) {
330 formattedUrlString = homepage;
333 // Load the initial website.
334 mainWebView.loadUrl(formattedUrlString);
336 // Load the ad if this is the free flavor.
337 BannerAd.requestAd(adView);
341 protected void onNewIntent(Intent intent) {
342 // Sets the new intent as the activity intent, so that any future getIntent()s pick up this one instead of creating a new activity.
345 if (intent.getData() != null) {
346 // Get the intent data and convert it to a string.
347 final Uri intentUriData = intent.getData();
348 formattedUrlString = intentUriData.toString();
352 mainWebView.loadUrl(formattedUrlString);
354 // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
355 mainWebView.requestFocus();
359 public boolean onCreateOptionsMenu(Menu menu) {
360 // Inflate the menu; this adds items to the action bar if it is present.
361 getMenuInflater().inflate(R.menu.menu_webview, menu);
363 // Set mainMenu so it can be used by onOptionsItemSelected.
366 // Get MenuItems for checkable menu items.
367 MenuItem toggleJavaScript = menu.findItem(R.id.toggleJavaScript);
368 MenuItem toggleDomStorage = menu.findItem(R.id.toggleDomStorage);
369 /* toggleSaveFormData does nothing until database storage is implemented.
370 MenuItem toggleSaveFormData = menu.findItem(R.id.toggleSaveFormData);
372 MenuItem toggleCookies = menu.findItem(R.id.toggleCookies);
374 // Set the initial icon for toggleJavaScript
375 if (javaScriptEnabled) {
376 toggleJavaScript.setIcon(R.drawable.javascript_enabled);
378 if (domStorageEnabled || cookiesEnabled) {
379 toggleJavaScript.setIcon(R.drawable.warning);
381 toggleJavaScript.setIcon(R.drawable.privacy_mode);
385 // Set the initial status of the menu item checkboxes.
386 toggleDomStorage.setChecked(domStorageEnabled);
387 /* toggleSaveFormData does nothing until database storage is implemented.
388 toggleSaveFormData.setChecked(saveFormDataEnabled);
390 toggleCookies.setChecked(cookiesEnabled);
396 public boolean onPrepareOptionsMenu(Menu menu) {
397 // Enable Clear Cookies if there are any.
398 MenuItem clearCookies = menu.findItem(R.id.clearCookies);
399 clearCookies.setEnabled(cookieManager.hasCookies());
401 // Enable Back if canGoBack().
402 MenuItem back = menu.findItem(R.id.back);
403 back.setEnabled(mainWebView.canGoBack());
405 // Enable forward if canGoForward().
406 MenuItem forward = menu.findItem(R.id.forward);
407 forward.setEnabled(mainWebView.canGoForward());
409 // Run all the other default commands.
410 super.onPrepareOptionsMenu(menu);
412 // return true displays the menu.
417 // @TargetApi(11) turns off the errors regarding copy and paste, which are removed from view in menu_webview.xml for lower version of Android.
419 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
420 @SuppressLint("SetJavaScriptEnabled")
421 // removeAllCookies is deprecated, but it is required for API < 21.
422 @SuppressWarnings("deprecation")
423 public boolean onOptionsItemSelected(MenuItem menuItem) {
424 int menuItemId = menuItem.getItemId();
426 // Some options need to update the drawable for toggleJavaScript.
427 MenuItem toggleJavaScript = mainMenu.findItem(R.id.toggleJavaScript);
429 // Set the commands that relate to the menu entries.
430 switch (menuItemId) {
431 case R.id.toggleJavaScript:
432 if (javaScriptEnabled) {
433 javaScriptEnabled = false;
434 mainWebView.getSettings().setJavaScriptEnabled(false);
435 mainWebView.reload();
437 // Update the toggleJavaScript icon and display a snackbar.
438 if (domStorageEnabled || cookiesEnabled) {
439 menuItem.setIcon(R.drawable.warning);
440 if (domStorageEnabled && cookiesEnabled) {
441 Snackbar.make(findViewById(R.id.mainWebView), R.string.both_still_enabled, Snackbar.LENGTH_SHORT).show();
443 if (domStorageEnabled) {
444 Snackbar.make(findViewById(R.id.mainWebView), R.string.dom_storage_still_enabled, Snackbar.LENGTH_SHORT).show();
446 Snackbar.make(findViewById(R.id.mainWebView), R.string.cookies_still_enabled, Snackbar.LENGTH_SHORT).show();
450 menuItem.setIcon(R.drawable.privacy_mode);
451 Snackbar.make(findViewById(R.id.mainWebView), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
454 javaScriptEnabled = true;
455 menuItem.setIcon(R.drawable.javascript_enabled);
456 mainWebView.getSettings().setJavaScriptEnabled(true);
457 mainWebView.reload();
458 Snackbar.make(findViewById(R.id.mainWebView), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
462 case R.id.toggleDomStorage:
463 if (domStorageEnabled) {
464 domStorageEnabled = false;
465 menuItem.setChecked(false);
466 mainWebView.getSettings().setDomStorageEnabled(false);
467 mainWebView.reload();
469 // Update the toggleJavaScript icon and display a snackbar if appropriate.
470 if (!javaScriptEnabled && !cookiesEnabled) {
471 toggleJavaScript.setIcon(R.drawable.privacy_mode);
472 Snackbar.make(findViewById(R.id.mainWebView), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
474 if (cookiesEnabled) {
475 toggleJavaScript.setIcon(R.drawable.warning);
476 Snackbar.make(findViewById(R.id.mainWebView), R.string.cookies_still_enabled, Snackbar.LENGTH_SHORT).show();
477 } // Else Do nothing because JavaScript is enabled.
480 domStorageEnabled = true;
481 menuItem.setChecked(true);
482 mainWebView.getSettings().setDomStorageEnabled(true);
483 mainWebView.reload();
485 // Update the toggleJavaScript icon if appropriate.
486 if (!javaScriptEnabled) {
487 toggleJavaScript.setIcon(R.drawable.warning);
488 } // Else Do nothing because JavaScript is enabled.
490 Snackbar.make(findViewById(R.id.mainWebView), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
494 /* toggleSaveFormData does nothing until database storage is implemented.
495 case R.id.toggleSaveFormData:
496 if (saveFormDataEnabled) {
497 saveFormDataEnabled = false;
498 menuItem.setChecked(false);
499 mainWebView.getSettings().setSaveFormData(false);
500 mainWebView.reload();
502 saveFormDataEnabled = true;
503 menuItem.setChecked(true);
504 mainWebView.getSettings().setSaveFormData(true);
505 mainWebView.reload();
510 case R.id.toggleCookies:
511 if (cookiesEnabled) {
512 cookiesEnabled = false;
513 menuItem.setChecked(false);
514 cookieManager.setAcceptCookie(false);
515 mainWebView.reload();
517 // Update the toggleJavaScript icon and display a snackbar if appropriate.
518 if (!javaScriptEnabled && !domStorageEnabled) {
519 toggleJavaScript.setIcon(R.drawable.privacy_mode);
520 Snackbar.make(findViewById(R.id.mainWebView), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
522 if (domStorageEnabled) {
523 toggleJavaScript.setIcon(R.drawable.warning);
524 Snackbar.make(findViewById(R.id.mainWebView), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
525 } // Else Do nothing because JavaScript is enabled.
528 cookiesEnabled = true;
529 menuItem.setChecked(true);
530 cookieManager.setAcceptCookie(true);
531 mainWebView.reload();
533 // Update the toggleJavaScript icon if appropriate.
534 if (!javaScriptEnabled) {
535 toggleJavaScript.setIcon(R.drawable.warning);
536 } // Else Do nothing because JavaScript is enabled.
538 Snackbar.make(findViewById(R.id.mainWebView), R.string.cookies_enabled, Snackbar.LENGTH_SHORT).show();
542 case R.id.clearDomStorage:
543 WebStorage webStorage = WebStorage.getInstance();
544 webStorage.deleteAllData();
545 Snackbar.make(findViewById(R.id.mainWebView), R.string.dom_storage_deleted, Snackbar.LENGTH_SHORT).show();
548 case R.id.clearCookies:
549 if (Build.VERSION.SDK_INT < 21) {
550 cookieManager.removeAllCookie();
552 cookieManager.removeAllCookies(null);
554 Snackbar.make(findViewById(R.id.mainWebView), R.string.cookies_deleted, Snackbar.LENGTH_SHORT).show();
557 case R.id.addToHomescreen:
558 // Show the CreateHomeScreenShortcut AlertDialog and name this instance createShortcut.
559 AppCompatDialogFragment shortcutDialog = new CreateHomeScreenShortcut();
560 shortcutDialog.show(getSupportFragmentManager(), "createShortcut");
562 //Everything else will be handled by CreateHomeScreenShortcut and the associated listeners below.
566 // Launch the system Download Manager.
567 Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
569 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
570 downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
572 startActivity(downloadManagerIntent);
576 mainWebView.loadUrl(homepage);
580 mainWebView.goBack();
584 mainWebView.goForward();
588 Intent shareIntent = new Intent();
589 shareIntent.setAction(Intent.ACTION_SEND);
590 shareIntent.putExtra(Intent.EXTRA_TEXT, urlTextBox.getText().toString());
591 shareIntent.setType("text/plain");
592 startActivity(Intent.createChooser(shareIntent, "Share URL"));
596 // Launch SettingsActivity.
597 Intent intent = new Intent(this, SettingsActivity.class);
598 startActivity(intent);
602 // Show the AboutDialog AlertDialog and name this instance aboutDialog.
603 AppCompatDialogFragment aboutDialog = new AboutDialog();
604 aboutDialog.show(getSupportFragmentManager(), "aboutDialog");
607 case R.id.clearAndExit:
608 // Clear DOM storage.
609 WebStorage domStorage = WebStorage.getInstance();
610 domStorage.deleteAllData();
612 // Clear cookies. The commands changed slightly in API 21.
613 if (Build.VERSION.SDK_INT >= 21) {
614 cookieManager.removeAllCookies(null);
616 cookieManager.removeAllCookie();
619 // Destroy the internal state of the webview.
620 mainWebView.destroy();
622 // Close Privacy Browser. finishAndRemoveTask also removes Privacy Browser from the recent app list.
623 if (Build.VERSION.SDK_INT >= 21) {
624 finishAndRemoveTask();
631 return super.onOptionsItemSelected(menuItem);
636 public void onCreateHomeScreenShortcutCancel(DialogFragment dialog) {
637 // Do nothing because the user selected "Cancel".
641 public void onCreateHomeScreenShortcutCreate(DialogFragment dialog) {
642 // Get shortcutNameEditText from the alert dialog.
643 EditText shortcutNameEditText = (EditText) dialog.getDialog().findViewById(R.id.shortcutNameEditText);
645 // Create the bookmark shortcut based on formattedUrlString.
646 Intent bookmarkShortcut = new Intent();
647 bookmarkShortcut.setAction(Intent.ACTION_VIEW);
648 bookmarkShortcut.setData(Uri.parse(formattedUrlString));
650 // Place the bookmark shortcut on the home screen.
651 Intent placeBookmarkShortcut = new Intent();
652 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
653 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
654 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIcon);
655 placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
656 sendBroadcast(placeBookmarkShortcut);
659 // Override onBackPressed so that if mainWebView can go back it does when the system back button is pressed.
661 public void onBackPressed() {
662 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
664 if (mainWebView.canGoBack()) {
665 mainWebView.goBack();
667 super.onBackPressed();
671 private void loadUrlFromTextBox() throws UnsupportedEncodingException {
672 // Get the text from urlTextBox and convert it to a string.
673 String unformattedUrlString = urlTextBox.getText().toString();
674 URL unformattedUrl = null;
675 Uri.Builder formattedUri = new Uri.Builder();
677 // Check to see if unformattedUrlString is a valid URL. Otherwise, convert it into a Duck Duck Go search.
678 if (Patterns.WEB_URL.matcher(unformattedUrlString).matches()) {
679 // Add http:// at the beginning if it is missing. Otherwise the app will segfault.
680 if (!unformattedUrlString.startsWith("http")) {
681 unformattedUrlString = "http://" + unformattedUrlString;
684 // 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.
686 unformattedUrl = new URL(unformattedUrlString);
687 } catch (MalformedURLException e) {
691 // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if .get was called on a null value.
692 final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
693 final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
694 final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
695 final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
696 final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
698 formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
699 formattedUrlString = formattedUri.build().toString();
701 // Sanitize the search input and convert it to a DuckDuckGo search.
702 final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
704 // Use the correct search URL based on javaScriptEnabled.
705 if (javaScriptEnabled) {
706 formattedUrlString = "https://duckduckgo.com/?q=" + encodedUrlString;
708 formattedUrlString = "https://duckduckgo.com/html/?q=" + encodedUrlString;
712 mainWebView.loadUrl(formattedUrlString);
714 // Hides the keyboard so we can see the webpage.
715 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
716 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);