X-Git-Url: https://gitweb.stoutner.com/?a=blobdiff_plain;f=app%2Fsrc%2Fmain%2Fjava%2Fcom%2Fstoutner%2Fprivacybrowser%2FWebview.java;h=53311f7adb6f5c51e9c8a86193a74ee2e4d3bc2f;hb=dcc9119811a9eed34df55da205c55c3092c262a4;hp=abbc170fb6a30061938a62d5a07529c51a34f4ba;hpb=e86f193379868c495d5b48a76cbdedc06a03f3a9;p=PrivacyBrowserAndroid.git diff --git a/app/src/main/java/com/stoutner/privacybrowser/Webview.java b/app/src/main/java/com/stoutner/privacybrowser/Webview.java index abbc170f..53311f7a 100644 --- a/app/src/main/java/com/stoutner/privacybrowser/Webview.java +++ b/app/src/main/java/com/stoutner/privacybrowser/Webview.java @@ -1,91 +1,298 @@ +/** + * Copyright 2015-2016 Soren Stoutner . + * + * This file is part of 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 . + */ + package com.stoutner.privacybrowser; +import android.annotation.SuppressLint; +import android.annotation.TargetApi; import android.app.Activity; +import android.app.DownloadManager; +import android.content.ClipData; +import android.content.ClipboardManager; +import android.content.Context; import android.content.Intent; +import android.graphics.Bitmap; import android.net.Uri; +import android.os.Build; import android.os.Bundle; +import android.support.v4.app.DialogFragment; +import android.support.v7.app.ActionBar; import android.support.v7.app.AppCompatActivity; +import android.support.v7.app.AppCompatDialogFragment; +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 android.widget.Toast; +import java.io.UnsupportedEncodingException; +import java.net.MalformedURLException; import java.net.URL; - - -public class Webview extends AppCompatActivity { - - static String formattedUrlString; - static WebView mainWebView; - static ProgressBar progressBar; - static final String homepage = "https://www.duckduckgo.com"; +import java.net.URLEncoder; + +public class Webview extends AppCompatActivity implements CreateHomeScreenShortcut.CreateHomeScreenSchortcutListener { + // favoriteIcon is public static so it can be accessed from CreateHomeScreenShortcut. + public static Bitmap favoriteIcon; + + // mainWebView is used in onCreate and onOptionsItemSelected. + private WebView mainWebView; + // formattedUrlString is used in onCreate, onOptionsItemSelected, onCreateHomeScreenShortcutCreate, and loadUrlFromTextBox. + private String formattedUrlString; + // homepage is used in onCreate and onOptionsItemSelected. + private String homepage = "https://www.duckduckgo.com/"; + // enableJavaScript is used in onCreate, onCreateOptionsMenu, and onOptionsItemSelected. + private boolean enableJavaScript; + // enableDomStorage is used in onCreate, onCreateOptionsMenu, and onOptionsItemSelected. + private boolean enableDomStorage; + + /* enableSaveFormData does nothing until database storage is implemented. + // enableSaveFormData is used in onCreate, onCreateOptionsMenu, and onOptionsItemSelected. + private boolean enableSaveFormData; + */ + + // cookieManager is used in onCreate and onOptionsItemSelected. + private CookieManager cookieManager; + // enableCookies is used in onCreate, onCreateOptionsMenu, and onOptionsItemSelected. + private boolean enableCookies; + + // actionBar is used in onCreate and onOptionsItemSelected. + private ActionBar actionBar; @Override + // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled. + @SuppressLint("SetJavaScriptEnabled") protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_webview); - final EditText urlTextBox = (EditText) findViewById(R.id.urlTextBox); + final FrameLayout fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.fullScreenVideoFrameLayout); + final Activity mainWebViewActivity = this; + mainWebView = (WebView) findViewById(R.id.mainWebView); - progressBar = (ProgressBar) findViewById(R.id.progressBar); + actionBar = getSupportActionBar(); + + if (actionBar != null) { + // Remove the title from the action bar. + actionBar.setDisplayShowTitleEnabled(false); + + // Add the custom app_bar layout, which shows the favoriteIcon, urlTextBar, and progressBar. + actionBar.setCustomView(R.layout.app_bar); + actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM); + + // Set the "go" button on the keyboard to load the URL in urlTextBox. + EditText urlTextBox = (EditText) actionBar.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; + } + } + }); + } - // setWebViewClient makes this WebView the default handler for URLs inside the app, so that links are not kicked out to other apps. - // Save the URL to formattedUrlString and update urlTextBox before loading mainWebView. 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) { - formattedUrlString=url; - urlTextBox.setText(formattedUrlString); mainWebView.loadUrl(url); return true; } + + /* These errors do not provide any useful information and clutter the screen. + public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) { + Toast.makeText(mainWebViewActivity, "Error loading " + request + " Error: " + error, Toast.LENGTH_SHORT).show(); + } + */ + + // Update the URL in urlTextBox when the page starts to load. + @Override + public void onPageStarted(WebView view, String url, Bitmap favicon) { + if (actionBar != null) { + EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox); + 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; + + if (actionBar != null) { + EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox); + urlTextBox.setText(formattedUrlString); + } + } }); - // Update the progress bar when a page is loading. mainWebView.setWebChromeClient(new WebChromeClient() { + // Update the progress bar when a page is loading. + @Override public void onProgressChanged(WebView view, int progress) { - progressBar.setProgress(progress); - if (progress < 100) { - progressBar.setVisibility(View.VISIBLE); - } else { - progressBar.setVisibility(View.GONE); + // Make sure that actionBar is not null. + if (actionBar != null) { + ProgressBar progressBar = (ProgressBar) actionBar.getCustomView().findViewById(R.id.progressBar); + progressBar.setProgress(progress); + if (progress < 100) { + progressBar.setVisibility(View.VISIBLE); + } else { + progressBar.setVisibility(View.GONE); + } + } + } + + // 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 actionBar if it is not null. + if (actionBar != null) { + ImageView imageViewFavoriteIcon = (ImageView) actionBar.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 (getSupportActionBar() != null) { + getSupportActionBar().hide(); + } + + fullScreenVideoFrameLayout.addView(view); + fullScreenVideoFrameLayout.setVisibility(View.VISIBLE); + + mainWebView.setVisibility(View.GONE); + + /* 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. + if (Build.VERSION.SDK_INT >= 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 (getSupportActionBar() != null) { + getSupportActionBar().show(); + } + + mainWebView.setVisibility(View.VISIBLE); + + 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 if the API is 11 or greater. + if (Build.VERSION.SDK_INT >= 11) { + requestUri.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); } + + downloadManager.enqueue(requestUri); + Toast.makeText(mainWebViewActivity, "Download started", Toast.LENGTH_SHORT).show(); } }); // Allow pinch to zoom. mainWebView.getSettings().setBuiltInZoomControls(true); - // Hide zoom controls. - mainWebView.getSettings().setDisplayZoomControls(false); + // Hide zoom controls if the API is 11 or greater. + if (Build.VERSION.SDK_INT >= 11) { + mainWebView.getSettings().setDisplayZoomControls(false); + } + + // Set JavaScript initial status. + enableJavaScript = false; + mainWebView.getSettings().setJavaScriptEnabled(enableJavaScript); - // Enable JavaScript. - mainWebView.getSettings().setJavaScriptEnabled(true); + // Set DOM Storage initial status. + enableDomStorage = false; + mainWebView.getSettings().setDomStorageEnabled(enableDomStorage); - // Enable DOM Storage. - mainWebView.getSettings().setDomStorageEnabled(true); + /* Save Form Data does nothing until database storage is implemented. + // Set Save Form Data initial status. + enableSaveFormData = true; + mainWebView.getSettings().setSaveFormData(enableSaveFormData); + */ + + // Set Cookies initial status. + enableCookies = false; + cookieManager = CookieManager.getInstance(); + cookieManager.setAcceptCookie(enableCookies); // Get the intent information that started the app. final Intent intent = getIntent(); if (intent.getData() != null) { - // Get the intent data. + // Get the intent data and convert it to a string. final Uri intentUriData = intent.getData(); - - // Try to parse the intent data and store it in urlData. - URL urlData = null; - try { - urlData = new URL(intentUriData.getScheme(), intentUriData.getHost(), intentUriData.getPath()); - } catch (Exception e) { - e.printStackTrace(); - } - - Webview.formattedUrlString = urlData.toString(); + formattedUrlString = intentUriData.toString(); } // If formattedUrlString is null assign the homepage to it. @@ -93,55 +300,283 @@ public class Webview extends AppCompatActivity { formattedUrlString = homepage; } - // Place the formattedUrlString in the address bar and load the website. - urlTextBox.setText(formattedUrlString); + // Load the initial website. mainWebView.loadUrl(formattedUrlString); + } - // Set the "go" button on the keyboard to load the URL. - 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 - if ((event.getAction() == KeyEvent.ACTION_DOWN) && - (keyCode == KeyEvent.KEYCODE_ENTER)) { - // Load the URL into the mainWebView and consume the event. - loadUrlFromTextBox(mainWebView); - return true; - } - // Do not consume the event. - return false; - } - }); + @Override + protected void onNewIntent(Intent intent) { + // Sets the new intent as the activity intent, so that any future getIntent() picks up this one. + setIntent(intent); + if (intent.getData() != null) { + // Get the intent data and convert it to a string. + final Uri intentUriData = intent.getData(); + formattedUrlString = intentUriData.toString(); + } + + // Load the website. + mainWebView.loadUrl(formattedUrlString); } @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_webview, menu); + + // Get MenuItems for checkable menu items. + MenuItem toggleJavaScript = menu.findItem(R.id.toggleJavaScript); + MenuItem toggleDomStorage = menu.findItem(R.id.toggleDomStorage); + /* toggleSaveFormData does nothing until database storage is implemented. + MenuItem toggleSaveFormData = menu.findItem(R.id.toggleSaveFormData); + */ + MenuItem toggleCookies = menu.findItem(R.id.toggleCookies); + + // Set the initial status of the menu item checkboxes. + toggleJavaScript.setChecked(enableJavaScript); + toggleDomStorage.setChecked(enableDomStorage); + /* toggleSaveFormData does nothing until database storage is implemented. + toggleSaveFormData.setChecked(enableSaveFormData); + */ + toggleCookies.setChecked(enableCookies); + + return true; + } + + @Override + public boolean onPrepareOptionsMenu(Menu menu) { + // Enable Clear Cookies if there are any. + MenuItem clearCookies = menu.findItem(R.id.clearCookies); + clearCookies.setEnabled(cookieManager.hasCookies()); + + // Enable Back if canGoBack(). + MenuItem back = menu.findItem(R.id.back); + back.setEnabled(mainWebView.canGoBack()); + + // Enable forward if canGoForward(). + MenuItem forward = menu.findItem(R.id.forward); + forward.setEnabled(mainWebView.canGoForward()); + + // Run all the other default commands. + super.onPrepareOptionsMenu(menu); + + // return true displays the menu. return true; } @Override + // @TargetApi(11) turns off the errors regarding copy and paste, which are removed from view in menu_webview.xml for lower version of Android. + @TargetApi(11) + // 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(); - final WebView mainWebView = (WebView) findViewById(R.id.mainWebView); + ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE); - // Use the menu items to go forward or back. + // Sets the commands that relate to the menu entries. switch (menuItemId) { + case R.id.toggleJavaScript: + if (enableJavaScript) { + enableJavaScript = false; + menuItem.setChecked(false); + mainWebView.getSettings().setJavaScriptEnabled(false); + mainWebView.reload(); + } else { + enableJavaScript = true; + menuItem.setChecked(true); + mainWebView.getSettings().setJavaScriptEnabled(true); + mainWebView.reload(); + } + return true; + + case R.id.toggleDomStorage: + if (enableDomStorage) { + enableDomStorage = false; + menuItem.setChecked(false); + mainWebView.getSettings().setDomStorageEnabled(false); + mainWebView.reload(); + } else { + enableDomStorage = true; + menuItem.setChecked(true); + mainWebView.getSettings().setDomStorageEnabled(true); + mainWebView.reload(); + } + return true; + + /* toggleSaveFormData does nothing until database storage is implemented. + case R.id.toggleSaveFormData: + if (enableSaveFormData) { + enableSaveFormData = false; + menuItem.setChecked(false); + mainWebView.getSettings().setSaveFormData(false); + mainWebView.reload(); + } else { + enableSaveFormData = true; + menuItem.setChecked(true); + mainWebView.getSettings().setSaveFormData(true); + mainWebView.reload(); + } + return true; + */ + + case R.id.toggleCookies: + if (enableCookies) { + enableCookies = false; + menuItem.setChecked(false); + cookieManager.setAcceptCookie(false); + mainWebView.reload(); + } else { + enableCookies = true; + menuItem.setChecked(true); + cookieManager.setAcceptCookie(true); + mainWebView.reload(); + } + return true; + + case R.id.clearDomStorage: + WebStorage webStorage = WebStorage.getInstance(); + webStorage.deleteAllData(); + Toast.makeText(getApplicationContext(), "DOM storage deleted", Toast.LENGTH_SHORT).show(); + return true; + + case R.id.clearCookies: + if (Build.VERSION.SDK_INT < 21) { + cookieManager.removeAllCookie(); + } else { + cookieManager.removeAllCookies(null); + } + Toast.makeText(getApplicationContext(), "Cookies deleted", Toast.LENGTH_SHORT).show(); + return true; + + case R.id.home: + mainWebView.loadUrl(homepage); + return true; + + case R.id.refresh: + mainWebView.reload(); + return true; + case R.id.back: mainWebView.goBack(); - break; + return true; + case R.id.forward: mainWebView.goForward(); - break; + return true; + + case R.id.copyURL: + // Make sure that actionBar is not null. + if (actionBar != null) { + EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox); + clipboard.setPrimaryClip(ClipData.newPlainText("URL", urlTextBox.getText())); + } + return true; + + case R.id.pasteURL: + // Make sure that actionBar is not null. + if (actionBar != null) { + ClipData.Item clipboardData = clipboard.getPrimaryClip().getItemAt(0); + EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox); + urlTextBox.setText(clipboardData.coerceToText(this)); + try { + loadUrlFromTextBox(); + } catch (UnsupportedEncodingException e) { + e.printStackTrace(); + } + } + return true; + + case R.id.shareURL: + // Make sure that actionBar is not null. + if (actionBar != null) { + EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox); + 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.downloads: + // Launch the system Download Manager. + Intent downloadManangerIntent = 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. + downloadManangerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); + + startActivity(downloadManangerIntent); + return true; + + case R.id.about: + // Show the AboutDialog AlertDialog and name this instance aboutDialog. + AppCompatDialogFragment aboutDialog = new AboutDialog(); + aboutDialog.show(getSupportFragmentManager(), "aboutDialog"); + return true; + + case R.id.exit: + // Clear DOM storage. + WebStorage domStorage = WebStorage.getInstance(); + domStorage.deleteAllData(); + + // Clear cookies. + if (Build.VERSION.SDK_INT < 21) { + cookieManager.removeAllCookie(); + } else { + cookieManager.removeAllCookies(null); + } + + // Destroy the internal state of the webview. + mainWebView.destroy(); + + // Close Privacy Browser. + finish(); + return true; + + default: + return super.onOptionsItemSelected(menuItem); } + } + + @Override + public void onCreateHomeScreenShortcutCancel(DialogFragment dialog) { + // Do nothing because the user selected "Cancel". + } - return super.onOptionsItemSelected(menuItem); + @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 so that if mainWebView can go back it does when the system back button is pressed. @Override public void onBackPressed() { + final WebView mainWebView = (WebView) findViewById(R.id.mainWebView); + if (mainWebView.canGoBack()) { mainWebView.goBack(); } else { @@ -149,39 +584,54 @@ public class Webview extends AppCompatActivity { } } - public void loadUrlFromTextBox(View view) { - // Get the text from urlTextInput and convert it to a string. - final EditText urlTextBox = (EditText) findViewById(R.id.urlTextBox); - final String unformattedUrlString = urlTextBox.getText().toString(); - - // Don't do anything unless unformattedUrlString is at least 6 characters long. - if (unformattedUrlString.length() < 6) { return; } - - // Add correct protocol formatting to the beginning of the URL if needed. - final String firstSixCharacters = unformattedUrlString.substring(0, 6); - - switch (firstSixCharacters) { - case "http:/": - formattedUrlString = unformattedUrlString; - break; - case "https:": - formattedUrlString = unformattedUrlString; - break; - case "ftp://": - formattedUrlString = unformattedUrlString; - break; - default: - formattedUrlString = "http://" + unformattedUrlString; - } + public void loadUrlFromTextBox() throws UnsupportedEncodingException { + // Make sure that actionBar is not null. + ActionBar actionBar = getSupportActionBar(); + if (actionBar != null) { + final WebView mainWebView = (WebView) findViewById(R.id.mainWebView); + EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox); - final WebView mainWebView = (WebView) findViewById(R.id.mainWebView); + // Get the text from urlTextInput and convert it to a string. + String unformattedUrlString = urlTextBox.getText().toString(); + URL unformattedUrl = null; + Uri.Builder formattedUri = new Uri.Builder(); - // Place the URL text back in the address bar and load the website. - urlTextBox.setText(formattedUrlString); - mainWebView.loadUrl(formattedUrlString); + // 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(); - // Hides the keyboard so we can see the webpage. - InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE); - inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0); + } else { + // Sanitize the search input and convert it to a DuckDuckGo search. + final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8"); + formattedUrlString = "https://duckduckgo.com/?q=" + 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); + } } -} +} \ No newline at end of file