Java tutorial
/** * Copyright 2015-2016 Soren Stoutner <soren@stoutner.com>. * * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>. * * Privacy Browser is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Privacy Browser is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Privacy Browser. If not, see <http://www.gnu.org/licenses/>. */ package com.stoutner.privacybrowser; import android.annotation.SuppressLint; import android.app.Activity; import android.app.DownloadManager; import android.content.Intent; import android.content.SharedPreferences; import android.content.res.Configuration; import android.graphics.Bitmap; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.design.widget.NavigationView; import android.support.design.widget.Snackbar; import android.support.v4.app.DialogFragment; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.app.AppCompatDialogFragment; import android.support.v7.widget.Toolbar; import android.util.Patterns; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.inputmethod.InputMethodManager; import android.webkit.CookieManager; import android.webkit.DownloadListener; import android.webkit.WebChromeClient; import android.webkit.WebStorage; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.EditText; import android.widget.FrameLayout; import android.widget.ImageView; import android.widget.ProgressBar; import java.io.UnsupportedEncodingException; import java.net.MalformedURLException; import java.net.URL; import java.net.URLEncoder; // We need to use AppCompatActivity from android.support.v7.app.AppCompatActivity to have access to the SupportActionBar until the minimum API is >= 21. public class MainWebViewActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, CreateHomeScreenShortcut.CreateHomeScreenSchortcutListener { // favoriteIcon is public static so it can be accessed from CreateHomeScreenShortcut. public static Bitmap favoriteIcon; // mainWebView is public static so it can be accessed from SettingsFragment. It is also used in onCreate(), onOptionsItemSelected(), onNavigationItemSelected(), and loadUrlFromTextBox(). public static WebView mainWebView; // mainMenu is public static so it can be accessed from SettingsFragment. It is also used in onCreateOptionsMenu() and onOptionsItemSelected(). public static Menu mainMenu; // cookieManager is public static so it can be accessed from SettingsFragment. It is also used in onCreate(), onOptionsItemSelected(), and onNavigationItemSelected(). public static CookieManager cookieManager; // javaScriptEnabled is public static so it can be accessed from SettingsFragment. It is also used in onCreate(), onCreateOptionsMenu(), onOptionsItemSelected(), and loadUrlFromTextBox(). public static boolean javaScriptEnabled; // firstPartyCookiesEnabled is public static so it can be accessed from SettingsFragment. It is also used in onCreate(), onCreateOptionsMenu(), onPrepareOptionsMenu(), and onOptionsItemSelected(). public static boolean firstPartyCookiesEnabled; // thirdPartyCookiesEnabled is used in onCreate(), onCreateOptionsMenu(), onPrepareOptionsMenu(), and onOptionsItemSelected(). public static boolean thirdPartyCookiesEnabled; // domStorageEnabled is public static so it can be accessed from SettingsFragment. It is also used in onCreate(), onCreateOptionsMenu(), and onOptionsItemSelected(). public static boolean domStorageEnabled; // javaScriptDisabledSearchURL is public static so it can be accessed from SettingsFragment. It is also used in onCreate() and loadURLFromTextBox(). public static String javaScriptDisabledSearchURL; // javaScriptEnabledSearchURL is public static so it can be accessed from SettingsFragment. It is also used in onCreate() and loadURLFromTextBox(). public static String javaScriptEnabledSearchURL; // homepage is public static so it can be accessed from SettingsFragment. It is also used in onCreate() and onOptionsItemSelected(). public static String homepage; // swipeToRefresh is public static so it can be accessed from SettingsFragment. It is also used in onCreate(). public static SwipeRefreshLayout swipeToRefresh; // swipeToRefreshEnabled is public static so it can be accessed from SettingsFragment. It is also used in onCreate(). public static boolean swipeToRefreshEnabled; // drawerToggle is used in onCreate(), onPostCreate(), onConfigurationChanged(), onNewIntent(), and onNavigationItemSelected(). private ActionBarDrawerToggle drawerToggle; // drawerLayout is used in onCreate(), onNewIntent(), and onBackPressed(). private DrawerLayout drawerLayout; // formattedUrlString is used in onCreate(), onOptionsItemSelected(), onCreateHomeScreenShortcutCreate(), and loadUrlFromTextBox(). private String formattedUrlString; // privacyIcon is used in onCreateOptionsMenu() and updatePrivacyIcon(). private MenuItem privacyIcon; // urlTextBox is used in onCreate(), onOptionsItemSelected(), and loadUrlFromTextBox(). private EditText urlTextBox; // adView is used in onCreate() and onConfigurationChanged(). private View adView; @Override // 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. @SuppressLint("SetJavaScriptEnabled") protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_coordinatorlayout); // We need to use the SupportActionBar from android.support.v7.app.ActionBar until the minimum API is >= 21. Toolbar supportAppBar = (Toolbar) findViewById(R.id.appBar); setSupportActionBar(supportAppBar); final ActionBar appBar = getSupportActionBar(); // This is needed to get rid of the Android Studio warning that appBar might be null. assert appBar != null; // Add the custom url_bar layout, which shows the favoriteIcon, urlTextBar, and progressBar. appBar.setCustomView(R.layout.url_bar); appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM); // Set the "go" button on the keyboard to load the URL in urlTextBox. urlTextBox = (EditText) appBar.getCustomView().findViewById(R.id.urlTextBox); urlTextBox.setOnKeyListener(new View.OnKeyListener() { public boolean onKey(View v, int keyCode, KeyEvent event) { // If the event is a key-down event on the "enter" button, load the URL. if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) { // Load the URL into the mainWebView and consume the event. try { loadUrlFromTextBox(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } // If the enter key was pressed, consume the event. return true; } else { // If any other key was pressed, do not consume the event. return false; } } }); final FrameLayout fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.fullScreenVideoFrameLayout); // Implement swipe to refresh swipeToRefresh = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout); assert swipeToRefresh != null; //This assert removes the incorrect warning on the following line that swipeToRefresh might be null. swipeToRefresh.setColorSchemeResources(R.color.blue); swipeToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { mainWebView.reload(); } }); mainWebView = (WebView) findViewById(R.id.mainWebView); // Create the navigation drawer. drawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout); // The DrawerTitle identifies the drawer in accessibility mode. drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer)); // Listen for touches on the navigation menu. final NavigationView navigationView = (NavigationView) findViewById(R.id.navigationView); assert navigationView != null; // This assert removes the incorrect warning on the following line that navigationView might be null. navigationView.setNavigationItemSelectedListener(this); // drawerToggle creates the hamburger icon at the start of the AppBar. drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation, R.string.close_navigation); mainWebView.setWebViewClient(new WebViewClient() { // shouldOverrideUrlLoading makes this WebView the default handler for URLs inside the app, so that links are not kicked out to other apps. @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { mainWebView.loadUrl(url); return true; } // Update the URL in urlTextBox when the page starts to load. @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { urlTextBox.setText(url); } // Update formattedUrlString and urlTextBox. It is necessary to do this after the page finishes loading because the final URL can change during load. @Override public void onPageFinished(WebView view, String url) { formattedUrlString = url; // Only update urlTextBox if the user is not typing in it. if (!urlTextBox.hasFocus()) { urlTextBox.setText(formattedUrlString); } } }); mainWebView.setWebChromeClient(new WebChromeClient() { // Update the progress bar when a page is loading. @Override public void onProgressChanged(WebView view, int progress) { // Make sure that appBar is not null. if (appBar != null) { ProgressBar progressBar = (ProgressBar) appBar.getCustomView().findViewById(R.id.progressBar); progressBar.setProgress(progress); if (progress < 100) { progressBar.setVisibility(View.VISIBLE); } else { progressBar.setVisibility(View.GONE); //Stop the SwipeToRefresh indicator if it is running swipeToRefresh.setRefreshing(false); } } } // Set the favorite icon when it changes. @Override public void onReceivedIcon(WebView view, Bitmap icon) { // Save a copy of the favorite icon for use if a shortcut is added to the home screen. favoriteIcon = icon; // Place the favorite icon in the appBar if it is not null. if (appBar != null) { ImageView imageViewFavoriteIcon = (ImageView) appBar.getCustomView() .findViewById(R.id.favoriteIcon); imageViewFavoriteIcon.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true)); } } // Enter full screen video @Override public void onShowCustomView(View view, CustomViewCallback callback) { if (appBar != null) { appBar.hide(); } // Show the fullScreenVideoFrameLayout. assert fullScreenVideoFrameLayout != null; //This assert removes the incorrect warning on the following line that fullScreenVideoFrameLayout might be null. fullScreenVideoFrameLayout.addView(view); fullScreenVideoFrameLayout.setVisibility(View.VISIBLE); // Hide the mainWebView. mainWebView.setVisibility(View.GONE); // Hide the ad if this is the free flavor. BannerAd.hideAd(adView); /* SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bars on the bottom or right of the screen. * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar across the top of the screen. * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the navigation and status bars ghosted overlays and automatically rehides them. */ // Set the one flag supported by API >= 14. view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION); // Set the two flags that are supported by API >= 16. if (Build.VERSION.SDK_INT >= 16) { view.setSystemUiVisibility( View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN); } // Set all three flags that are supported by API >= 19. if (Build.VERSION.SDK_INT >= 19) { view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY); } } // Exit full screen video public void onHideCustomView() { if (appBar != null) { appBar.show(); } // Show the mainWebView. mainWebView.setVisibility(View.VISIBLE); // Show the ad if this is the free flavor. BannerAd.showAd(adView); // Hide the fullScreenVideoFrameLayout. assert fullScreenVideoFrameLayout != null; //This assert removes the incorrect warning on the following line that fullScreenVideoFrameLayout might be null. fullScreenVideoFrameLayout.removeAllViews(); fullScreenVideoFrameLayout.setVisibility(View.GONE); } }); // Allow the downloading of files. mainWebView.setDownloadListener(new DownloadListener() { // Launch the Android download manager when a link leads to a download. @Override public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) { DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); DownloadManager.Request requestUri = new DownloadManager.Request(Uri.parse(url)); // Add the URL as the description for the download. requestUri.setDescription(url); // Show the download notification after the download is completed. requestUri.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); // Initiate the download and display a Snackbar. downloadManager.enqueue(requestUri); Snackbar.make(findViewById(R.id.mainWebView), R.string.download_started, Snackbar.LENGTH_SHORT) .show(); } }); // Allow pinch to zoom. mainWebView.getSettings().setBuiltInZoomControls(true); // Hide zoom controls. mainWebView.getSettings().setDisplayZoomControls(false); // Initialize the default preference values the first time the program is run. PreferenceManager.setDefaultValues(this, R.xml.preferences, false); // Get the shared preference values. SharedPreferences savedPreferences = PreferenceManager.getDefaultSharedPreferences(this); // Set JavaScript initial status. The default value is false. javaScriptEnabled = savedPreferences.getBoolean("javascript_enabled", false); mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled); // Initialize cookieManager. cookieManager = CookieManager.getInstance(); // Set cookies initial status. The default value is false. firstPartyCookiesEnabled = savedPreferences.getBoolean("first_party_cookies_enabled", false); cookieManager.setAcceptCookie(firstPartyCookiesEnabled); // Set third-party cookies initial status if API >= 21. The default value is false. if (Build.VERSION.SDK_INT >= 21) { thirdPartyCookiesEnabled = savedPreferences.getBoolean("third_party_cookies_enabled", false); cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled); } // Set DOM storage initial status. The default value is false. domStorageEnabled = savedPreferences.getBoolean("dom_storage_enabled", false); mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled); // Set the user agent initial status. String userAgentString = savedPreferences.getString("user_agent", "Default user agent"); switch (userAgentString) { case "Default user agent": // Do nothing. break; case "Custom user agent": // Set the custom user agent on mainWebView, The default is "PrivacyBrowser/1.0". mainWebView.getSettings() .setUserAgentString(savedPreferences.getString("custom_user_agent", "PrivacyBrowser/1.0")); break; default: // Set the selected user agent on mainWebView. The default is "PrivacyBrowser/1.0". mainWebView.getSettings() .setUserAgentString(savedPreferences.getString("user_agent", "PrivacyBrowser/1.0")); break; } // Set the initial string for JavaScript disabled search. if (savedPreferences.getString("javascript_disabled_search", "https://duckduckgo.com/html/?q=") .equals("Custom URL")) { // Get the custom URL string. The default is "". javaScriptDisabledSearchURL = savedPreferences.getString("javascript_disabled_search_custom_url", ""); } else { // Use the string from javascript_disabled_search. javaScriptDisabledSearchURL = savedPreferences.getString("javascript_disabled_search", "https://duckduckgo.com/html/?q="); } // Set the initial string for JavaScript enabled search. if (savedPreferences.getString("javascript_enabled_search", "https://duckduckgo.com/?q=") .equals("Custom URL")) { // Get the custom URL string. The default is "". javaScriptEnabledSearchURL = savedPreferences.getString("javascript_enabled_search_custom_url", ""); } else { // Use the string from javascript_enabled_search. javaScriptEnabledSearchURL = savedPreferences.getString("javascript_enabled_search", "https://duckduckgo.com/?q="); } // Set homepage initial status. The default value is "https://www.duckduckgo.com". homepage = savedPreferences.getString("homepage", "https://www.duckduckgo.com"); // Set swipe to refresh initial status. The default is true. swipeToRefreshEnabled = savedPreferences.getBoolean("swipe_to_refresh_enabled", true); swipeToRefresh.setEnabled(swipeToRefreshEnabled); // Get the intent information that started the app. final Intent intent = getIntent(); if (intent.getData() != null) { // Get the intent data and convert it to a string. final Uri intentUriData = intent.getData(); formattedUrlString = intentUriData.toString(); } // If formattedUrlString is null assign the homepage to it. if (formattedUrlString == null) { formattedUrlString = homepage; } // Load the initial website. mainWebView.loadUrl(formattedUrlString); // Initialize AdView for the free flavor and request an ad. If this is not the free flavor BannerAd.requestAd() does nothing. adView = findViewById(R.id.adView); BannerAd.requestAd(adView); } @Override protected void onNewIntent(Intent intent) { // Sets the new intent as the activity intent, so that any future getIntent()s pick up this one instead of creating a new activity. setIntent(intent); if (intent.getData() != null) { // Get the intent data and convert it to a string. final Uri intentUriData = intent.getData(); formattedUrlString = intentUriData.toString(); } // Close the navigation drawer if it is open. if (drawerLayout.isDrawerVisible(GravityCompat.START)) { drawerLayout.closeDrawer(GravityCompat.START); } // Load the website. mainWebView.loadUrl(formattedUrlString); // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it. mainWebView.requestFocus(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_options, menu); // Set mainMenu so it can be used by onOptionsItemSelected. mainMenu = menu; // Initialize privacyIcon privacyIcon = menu.findItem(R.id.toggleJavaScript); // Get MenuItems for checkable menu items. MenuItem toggleFirstPartyCookies = menu.findItem(R.id.toggleFirstPartyCookies); MenuItem toggleThirdPartyCookies = menu.findItem(R.id.toggleThirdPartyCookies); MenuItem toggleDomStorage = menu.findItem(R.id.toggleDomStorage); // Set the initial status of the privacy icon. updatePrivacyIcon(); // Set the initial status of the menu item checkboxes. toggleFirstPartyCookies.setChecked(firstPartyCookiesEnabled); toggleThirdPartyCookies.setChecked(thirdPartyCookiesEnabled); toggleDomStorage.setChecked(domStorageEnabled); return true; } @Override public boolean onPrepareOptionsMenu(Menu menu) { // Only enable Third-Party Cookies if SDK >= 21 and First-Party Cookies are enabled. MenuItem toggleThirdPartyCookies = menu.findItem(R.id.toggleThirdPartyCookies); if ((Build.VERSION.SDK_INT >= 21) && firstPartyCookiesEnabled) { toggleThirdPartyCookies.setEnabled(true); } else { toggleThirdPartyCookies.setEnabled(false); } // Enable Clear Cookies if there are any. MenuItem clearCookies = menu.findItem(R.id.clearCookies); clearCookies.setEnabled(cookieManager.hasCookies()); // Run all the other default commands. super.onPrepareOptionsMenu(menu); // return true displays the menu. return true; } @Override // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled. @SuppressLint("SetJavaScriptEnabled") // removeAllCookies is deprecated, but it is required for API < 21. @SuppressWarnings("deprecation") public boolean onOptionsItemSelected(MenuItem menuItem) { int menuItemId = menuItem.getItemId(); // Set the commands that relate to the menu entries. switch (menuItemId) { case R.id.toggleJavaScript: // Switch the status of javaScriptEnabled. javaScriptEnabled = !javaScriptEnabled; // Apply the new JavaScript status. mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled); // Update the privacy icon. updatePrivacyIcon(); // Display a Snackbar. if (javaScriptEnabled) { Snackbar.make(findViewById(R.id.mainWebView), R.string.javascript_enabled, Snackbar.LENGTH_SHORT) .show(); } else { if (domStorageEnabled || firstPartyCookiesEnabled) { Snackbar.make(findViewById(R.id.mainWebView), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show(); } else { Snackbar.make(findViewById(R.id.mainWebView), R.string.privacy_mode, Snackbar.LENGTH_SHORT) .show(); } } // Reload the WebView. mainWebView.reload(); return true; case R.id.toggleFirstPartyCookies: // Switch the status of firstPartyCookiesEnabled. firstPartyCookiesEnabled = !firstPartyCookiesEnabled; // Update the menu checkbox. menuItem.setChecked(firstPartyCookiesEnabled); // Apply the new cookie status. cookieManager.setAcceptCookie(firstPartyCookiesEnabled); // Update the privacy icon. updatePrivacyIcon(); // Reload the WebView. mainWebView.reload(); return true; case R.id.toggleThirdPartyCookies: if (Build.VERSION.SDK_INT >= 21) { // Switch the status of thirdPartyCookiesEnabled. thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled; // Update the menu checkbox. menuItem.setChecked(thirdPartyCookiesEnabled); // Apply the new cookie status. cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled); // Reload the WebView. mainWebView.reload(); } // Else do nothing because SDK < 21. return true; case R.id.toggleDomStorage: // Switch the status of domStorageEnabled. domStorageEnabled = !domStorageEnabled; // Update the menu checkbox. menuItem.setChecked(domStorageEnabled); // Apply the new DOM Storage status. mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled); // Update the privacy icon. updatePrivacyIcon(); // Reload the WebView. mainWebView.reload(); return true; case R.id.clearCookies: if (Build.VERSION.SDK_INT < 21) { cookieManager.removeAllCookie(); } else { cookieManager.removeAllCookies(null); } Snackbar.make(findViewById(R.id.mainWebView), R.string.cookies_deleted, Snackbar.LENGTH_SHORT).show(); return true; case R.id.clearDomStorage: WebStorage webStorage = WebStorage.getInstance(); webStorage.deleteAllData(); Snackbar.make(findViewById(R.id.mainWebView), R.string.dom_storage_deleted, Snackbar.LENGTH_SHORT) .show(); return true; case R.id.share: Intent shareIntent = new Intent(); shareIntent.setAction(Intent.ACTION_SEND); shareIntent.putExtra(Intent.EXTRA_TEXT, urlTextBox.getText().toString()); shareIntent.setType("text/plain"); startActivity(Intent.createChooser(shareIntent, "Share URL")); return true; case R.id.addToHomescreen: // Show the CreateHomeScreenShortcut AlertDialog and name this instance createShortcut. AppCompatDialogFragment shortcutDialog = new CreateHomeScreenShortcut(); shortcutDialog.show(getSupportFragmentManager(), "createShortcut"); //Everything else will be handled by CreateHomeScreenShortcut and the associated listeners below. return true; case R.id.refresh: mainWebView.reload(); return true; default: // Don't consume the event. return super.onOptionsItemSelected(menuItem); } } @Override // removeAllCookies is deprecated, but it is required for API < 21. @SuppressWarnings("deprecation") public boolean onNavigationItemSelected(MenuItem menuItem) { int menuItemId = menuItem.getItemId(); switch (menuItemId) { case R.id.home: mainWebView.loadUrl(homepage); break; case R.id.back: if (mainWebView.canGoBack()) { mainWebView.goBack(); } break; case R.id.forward: if (mainWebView.canGoForward()) { mainWebView.goForward(); } break; case R.id.downloads: // Launch the system Download Manager. Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS); // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list. downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(downloadManagerIntent); break; case R.id.settings: // Launch SettingsActivity. Intent settingsIntent = new Intent(this, SettingsActivity.class); startActivity(settingsIntent); break; case R.id.about: // Launch AboutActivity. Intent aboutIntent = new Intent(this, AboutActivity.class); startActivity(aboutIntent); break; case R.id.clearAndExit: // Clear DOM storage. WebStorage domStorage = WebStorage.getInstance(); domStorage.deleteAllData(); // Clear cookies. The commands changed slightly in API 21. if (Build.VERSION.SDK_INT >= 21) { cookieManager.removeAllCookies(null); } else { cookieManager.removeAllCookie(); } // Clear cache. The argument of "true" includes disk files. mainWebView.clearCache(true); // Clear the back/forward history. mainWebView.clearHistory(); // Destroy the internal state of the webview. mainWebView.destroy(); // Close Privacy Browser. finishAndRemoveTask also removes Privacy Browser from the recent app list. if (Build.VERSION.SDK_INT >= 21) { finishAndRemoveTask(); } else { finish(); } break; default: break; } // Close the navigation drawer. drawerLayout.closeDrawer(GravityCompat.START); return true; } @Override public void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the state of the DrawerToggle after onRestoreInstanceState has finished. drawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Reload the ad if this is the free flavor. BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id)); // Reinitialize the adView variable, as the View will have been removed and re-added in the free flavor by BannerAd.reloadAfterRotate(). adView = findViewById(R.id.adView); } @Override public void onCreateHomeScreenShortcutCancel(DialogFragment dialog) { // Do nothing because the user selected "Cancel". } @Override public void onCreateHomeScreenShortcutCreate(DialogFragment dialog) { // Get shortcutNameEditText from the alert dialog. EditText shortcutNameEditText = (EditText) dialog.getDialog().findViewById(R.id.shortcutNameEditText); // Create the bookmark shortcut based on formattedUrlString. Intent bookmarkShortcut = new Intent(); bookmarkShortcut.setAction(Intent.ACTION_VIEW); bookmarkShortcut.setData(Uri.parse(formattedUrlString)); // Place the bookmark shortcut on the home screen. Intent placeBookmarkShortcut = new Intent(); placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut); placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString()); placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIcon); placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT"); sendBroadcast(placeBookmarkShortcut); } // Override onBackPressed to handle the navigation drawer and mainWebView. @Override public void onBackPressed() { final WebView mainWebView = (WebView) findViewById(R.id.mainWebView); // Close the navigation drawer if it is available. GravityCompat.START is the drawer on the left on Left-to-Right layout text. if (drawerLayout.isDrawerVisible(GravityCompat.START)) { drawerLayout.closeDrawer(GravityCompat.START); } else { // Load the previous URL if available. assert mainWebView != null; //This assert removes the incorrect warning on the following line that mainWebView might be null. if (mainWebView.canGoBack()) { mainWebView.goBack(); } else { // Pass onBackPressed to the system. super.onBackPressed(); } } } @Override public void onPause() { // We need to pause the adView or it will continue to consume resources in the background on the free flavor. BannerAd.pauseAd(adView); super.onPause(); } @Override public void onResume() { super.onResume(); // We need to resume the adView for the free flavor. BannerAd.resumeAd(adView); } private void loadUrlFromTextBox() throws UnsupportedEncodingException { // Get the text from urlTextBox and convert it to a string. String unformattedUrlString = urlTextBox.getText().toString(); URL unformattedUrl = null; Uri.Builder formattedUri = new Uri.Builder(); // Check to see if unformattedUrlString is a valid URL. Otherwise, convert it into a Duck Duck Go search. if (Patterns.WEB_URL.matcher(unformattedUrlString).matches()) { // Add http:// at the beginning if it is missing. Otherwise the app will segfault. if (!unformattedUrlString.startsWith("http")) { unformattedUrlString = "http://" + unformattedUrlString; } // 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. try { unformattedUrl = new URL(unformattedUrlString); } catch (MalformedURLException e) { e.printStackTrace(); } // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if .get was called on a null value. final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null; final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null; final String path = unformattedUrl != null ? unformattedUrl.getPath() : null; final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null; final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null; formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment); formattedUrlString = formattedUri.build().toString(); } else { // Sanitize the search input and convert it to a DuckDuckGo search. final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8"); // Use the correct search URL based on javaScriptEnabled. if (javaScriptEnabled) { formattedUrlString = javaScriptEnabledSearchURL + encodedUrlString; } else { // JavaScript is disabled. formattedUrlString = javaScriptDisabledSearchURL + encodedUrlString; } } mainWebView.loadUrl(formattedUrlString); // Hides the keyboard so we can see the webpage. InputMethodManager inputMethodManager = (InputMethodManager) getSystemService( Activity.INPUT_METHOD_SERVICE); inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0); } private void updatePrivacyIcon() { if (javaScriptEnabled) { privacyIcon.setIcon(R.drawable.javascript_enabled); } else { if (domStorageEnabled || firstPartyCookiesEnabled) { privacyIcon.setIcon(R.drawable.warning); } else { privacyIcon.setIcon(R.drawable.privacy_mode); } } } }