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.ClipData;
27 import android.content.ClipboardManager;
28 import android.content.Context;
29 import android.content.Intent;
30 import android.graphics.Bitmap;
31 import android.net.Uri;
32 import android.os.Build;
33 import android.os.Bundle;
34 import android.support.v4.app.DialogFragment;
35 import android.support.v7.app.ActionBar;
36 import android.support.v7.app.AppCompatActivity;
37 import android.support.v7.app.AppCompatDialogFragment;
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.inputmethod.InputMethodManager;
44 import android.webkit.DownloadListener;
45 import android.webkit.WebChromeClient;
46 import android.webkit.WebView;
47 import android.webkit.WebViewClient;
48 import android.widget.EditText;
49 import android.widget.FrameLayout;
50 import android.widget.ImageView;
51 import android.widget.ProgressBar;
52 import android.widget.Toast;
53 import java.io.UnsupportedEncodingException;
54 import java.net.MalformedURLException;
56 import java.net.URLEncoder;
58 public class Webview extends AppCompatActivity implements CreateHomeScreenShortcut.CreateHomeScreenSchortcutListener {
59 // favoriteIcon is public static so it can be accessed from CreateHomeScreenShortcut.
60 public static Bitmap favoriteIcon;
62 // mainWebView is used in onCreate and onOptionsItemSelected.
63 private WebView mainWebView;
64 // formattedUrlString is used in onCreate, onOptionsItemSelected, onCreateHomeScreenShortcutCreate, and loadUrlFromTextBox.
65 private String formattedUrlString;
66 // homepage is used in onCreate and onOptionsItemSelected.
67 private String homepage = "https://www.duckduckgo.com/";
68 // enableJavaScript is used onCreate and onOptionsItemSelected.
69 private boolean enableJavaScript;
70 // actionBar is used in onCreate and onOptionsItemSelected.
71 private ActionBar actionBar;
73 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
74 @SuppressLint("SetJavaScriptEnabled")
77 protected void onCreate(Bundle savedInstanceState) {
78 super.onCreate(savedInstanceState);
79 setContentView(R.layout.activity_webview);
81 final FrameLayout fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.fullScreenVideoFrameLayout);
82 final Activity mainWebViewActivity = this;
84 mainWebView = (WebView) findViewById(R.id.mainWebView);
85 actionBar = getSupportActionBar();
87 if (actionBar != null) {
88 // Remove the title from the action bar.
89 actionBar.setDisplayShowTitleEnabled(false);
91 // Add the custom app_bar layout, which shows the favoriteIcon, urlTextBar, and progressBar.
92 actionBar.setCustomView(R.layout.app_bar);
93 actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
95 // Set the "go" button on the keyboard to load the URL in urlTextBox.
96 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
97 urlTextBox.setOnKeyListener(new View.OnKeyListener() {
98 public boolean onKey(View v, int keyCode, KeyEvent event) {
99 // If the event is a key-down event on the "enter" button, load the URL.
100 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
101 // Load the URL into the mainWebView and consume the event.
103 loadUrlFromTextBox();
104 } catch (UnsupportedEncodingException e) {
107 // If the enter key was pressed, consume the event.
110 // If any other key was pressed, do not consume the event.
117 mainWebView.setWebViewClient(new WebViewClient() {
118 // shouldOverrideUrlLoading makes this WebView the default handler for URLs inside the app, so that links are not kicked out to other apps.
120 public boolean shouldOverrideUrlLoading(WebView view, String url) {
121 mainWebView.loadUrl(url);
125 /* These errors do not provide any useful information and clutter the screen.
126 public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
127 Toast.makeText(mainWebViewActivity, "Error loading " + request + " Error: " + error, Toast.LENGTH_SHORT).show();
131 // Update the URL in urlTextBox when the page starts to load.
133 public void onPageStarted(WebView view, String url, Bitmap favicon) {
134 if (actionBar != null) {
135 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
136 urlTextBox.setText(url);
140 // Update formattedUrlString and urlTextBox. It is necessary to do this after the page finishes loading because the final URL can change during load.
142 public void onPageFinished(WebView view, String url) {
143 formattedUrlString = url;
145 if (actionBar != null) {
146 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
147 urlTextBox.setText(formattedUrlString);
152 mainWebView.setWebChromeClient(new WebChromeClient() {
153 // Update the progress bar when a page is loading.
155 public void onProgressChanged(WebView view, int progress) {
156 // Make sure that actionBar is not null.
157 if (actionBar != null) {
158 ProgressBar progressBar = (ProgressBar) actionBar.getCustomView().findViewById(R.id.progressBar);
159 progressBar.setProgress(progress);
160 if (progress < 100) {
161 progressBar.setVisibility(View.VISIBLE);
163 progressBar.setVisibility(View.GONE);
168 // Set the favorite icon when it changes.
170 public void onReceivedIcon(WebView view, Bitmap icon) {
171 // Save a copy of the favorite icon for use if a shortcut is added to the home screen.
174 // Place the favorite icon in the actionBar if it is not null.
175 if (actionBar != null) {
176 ImageView imageViewFavoriteIcon = (ImageView) actionBar.getCustomView().findViewById(R.id.favoriteIcon);
177 imageViewFavoriteIcon.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
181 // Enter full screen video
183 public void onShowCustomView(View view, CustomViewCallback callback) {
184 if (getSupportActionBar() != null) {
185 getSupportActionBar().hide();
188 fullScreenVideoFrameLayout.addView(view);
189 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
191 mainWebView.setVisibility(View.GONE);
193 /* SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bars on the bottom or right of the screen.
194 ** SYSTEM_UI_FLAG_FULLSCREEN hides the status bar across the top of the screen.
195 ** SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the navigation and status bars ghosted overlays and automatically rehides them.
198 // Set the one flag supported by API >= 14.
199 if (Build.VERSION.SDK_INT >= 14) {
200 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
203 // Set the two flags that are supported by API >= 16.
204 if (Build.VERSION.SDK_INT >= 16) {
205 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN);
208 // Set all three flags that are supported by API >= 19.
209 if (Build.VERSION.SDK_INT >= 19) {
210 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
214 // Exit full screen video
215 public void onHideCustomView() {
216 if (getSupportActionBar() != null) {
217 getSupportActionBar().show();
220 mainWebView.setVisibility(View.VISIBLE);
222 fullScreenVideoFrameLayout.removeAllViews();
223 fullScreenVideoFrameLayout.setVisibility(View.GONE);
227 // Allow the downloading of files.
228 mainWebView.setDownloadListener(new DownloadListener() {
229 // Launch the Android download manager when a link leads to a download.
231 public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
232 DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
233 DownloadManager.Request requestUri = new DownloadManager.Request(Uri.parse(url));
235 // Add the URL as the description for the download.
236 requestUri.setDescription(url);
238 // Show the download notification after the download is completed if the API is 11 or greater.
239 if (Build.VERSION.SDK_INT >= 11) {
240 requestUri.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
243 downloadManager.enqueue(requestUri);
244 Toast.makeText(mainWebViewActivity, "Download started", Toast.LENGTH_SHORT).show();
248 // Allow pinch to zoom.
249 mainWebView.getSettings().setBuiltInZoomControls(true);
251 // Hide zoom controls if the API is 11 or greater.
252 if (Build.VERSION.SDK_INT >= 11) {
253 mainWebView.getSettings().setDisplayZoomControls(false);
256 // Set JavaScript initial status.
257 enableJavaScript = true;
258 if (enableJavaScript) {
259 mainWebView.getSettings().setJavaScriptEnabled(true);
261 mainWebView.getSettings().setJavaScriptEnabled(false);
264 // Enable DOM Storage.
265 mainWebView.getSettings().setDomStorageEnabled(true);
267 // Get the intent information that started the app.
268 final Intent intent = getIntent();
270 if (intent.getData() != null) {
271 // Get the intent data and convert it to a string.
272 final Uri intentUriData = intent.getData();
273 formattedUrlString = intentUriData.toString();
276 // If formattedUrlString is null assign the homepage to it.
277 if (formattedUrlString == null) {
278 formattedUrlString = homepage;
281 // Load the initial website.
282 mainWebView.loadUrl(formattedUrlString);
286 public boolean onCreateOptionsMenu(Menu menu) {
287 // Inflate the menu; this adds items to the action bar if it is present.
288 getMenuInflater().inflate(R.menu.menu_webview, menu);
289 MenuItem toggleJavaScriptMenuItem = menu.findItem(R.id.toggleJavaScript);
291 // Set the JavaScript menu item checkbox initial status.
292 if (enableJavaScript) {
293 toggleJavaScriptMenuItem.setChecked(true);
295 toggleJavaScriptMenuItem.setChecked(false);
302 // @TargetApi(11) turns off the errors regarding copy and paste, which are removed from view in menu_webview.xml for lower version of Android.
304 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
305 @SuppressLint("SetJavaScriptEnabled")
306 public boolean onOptionsItemSelected(MenuItem menuItem) {
307 int menuItemId = menuItem.getItemId();
308 ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
310 // Sets the commands that relate to the menu entries.
311 switch (menuItemId) {
312 case R.id.toggleJavaScript:
313 if (enableJavaScript) {
314 enableJavaScript = false;
315 menuItem.setChecked(false);
316 mainWebView.getSettings().setJavaScriptEnabled(false);
317 mainWebView.loadUrl(formattedUrlString);
319 enableJavaScript = true;
320 menuItem.setChecked(true);
321 mainWebView.getSettings().setJavaScriptEnabled(true);
322 mainWebView.loadUrl(formattedUrlString);
327 mainWebView.loadUrl(homepage);
331 mainWebView.loadUrl(formattedUrlString);
335 mainWebView.goBack();
339 mainWebView.goForward();
343 // Make sure that actionBar is not null.
344 if (actionBar != null) {
345 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
346 clipboard.setPrimaryClip(ClipData.newPlainText("URL", urlTextBox.getText()));
351 // Make sure that actionBar is not null.
352 if (actionBar != null) {
353 ClipData.Item clipboardData = clipboard.getPrimaryClip().getItemAt(0);
354 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
355 urlTextBox.setText(clipboardData.coerceToText(this));
357 loadUrlFromTextBox();
358 } catch (UnsupportedEncodingException e) {
365 // Make sure that actionBar is not null.
366 if (actionBar != null) {
367 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
368 Intent shareIntent = new Intent();
369 shareIntent.setAction(Intent.ACTION_SEND);
370 shareIntent.putExtra(Intent.EXTRA_TEXT, urlTextBox.getText().toString());
371 shareIntent.setType("text/plain");
372 startActivity(Intent.createChooser(shareIntent, "Share URL"));
376 case R.id.addToHomescreen:
377 // Show the CreateHomeScreenShortcut AlertDialog and name this instance createShortcut.
378 AppCompatDialogFragment shortcutDialog = new CreateHomeScreenShortcut();
379 shortcutDialog.show(getSupportFragmentManager(), "createShortcut");
381 //Everything else will be handled by CreateHomeScreenShortcut and the associated listeners below.
385 // Launch the system Download Manager.
386 Intent downloadManangerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
388 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
389 downloadManangerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
391 startActivity(downloadManangerIntent);
395 // Show the AboutDialog AlertDialog and name this instance aboutDialog.
396 AppCompatDialogFragment aboutDialog = new AboutDialog();
397 aboutDialog.show(getSupportFragmentManager(), "aboutDialog");
401 return super.onOptionsItemSelected(menuItem);
406 public void onCreateHomeScreenShortcutCancel(DialogFragment dialog) {
407 // Do nothing because the user selected "Cancel".
411 public void onCreateHomeScreenShortcutCreate(DialogFragment dialog) {
412 // Get shortcutNameEditText from the alert dialog.
413 EditText shortcutNameEditText = (EditText) dialog.getDialog().findViewById(R.id.shortcutNameEditText);
415 // Create the bookmark shortcut based on formattedUrlString.
416 Intent bookmarkShortcut = new Intent();
417 bookmarkShortcut.setAction(Intent.ACTION_VIEW);
418 bookmarkShortcut.setData(Uri.parse(formattedUrlString));
420 // Place the bookmark shortcut on the home screen.
421 Intent placeBookmarkShortcut = new Intent();
422 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
423 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
424 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIcon);
425 placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
426 sendBroadcast(placeBookmarkShortcut);
429 // Override onBackPressed so that if mainWebView can go back it does when the system back button is pressed.
431 public void onBackPressed() {
432 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
434 if (mainWebView.canGoBack()) {
435 mainWebView.goBack();
437 super.onBackPressed();
441 public void loadUrlFromTextBox() throws UnsupportedEncodingException {
442 // Make sure that actionBar is not null.
443 ActionBar actionBar = getSupportActionBar();
444 if (actionBar != null) {
445 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
446 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
448 // Get the text from urlTextInput and convert it to a string.
449 String unformattedUrlString = urlTextBox.getText().toString();
450 URL unformattedUrl = null;
451 Uri.Builder formattedUri = new Uri.Builder();
453 // Check to see if unformattedUrlString is a valid URL. Otherwise, convert it into a Duck Duck Go search.
454 if (Patterns.WEB_URL.matcher(unformattedUrlString).matches()) {
456 // Add http:// at the beginning if it is missing. Otherwise the app will segfault.
457 if (!unformattedUrlString.startsWith("http")) {
458 unformattedUrlString = "http://" + unformattedUrlString;
461 // 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.
463 unformattedUrl = new URL(unformattedUrlString);
464 } catch (MalformedURLException e) {
468 // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if .get was called on a null value.
469 final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
470 final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
471 final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
472 final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
473 final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
475 formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
476 formattedUrlString = formattedUri.build().toString();
479 // Sanitize the search input and convert it to a DuckDuckGo search.
480 final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
481 formattedUrlString = "https://duckduckgo.com/?q=" + encodedUrlString;
484 mainWebView.loadUrl(formattedUrlString);
486 // Hides the keyboard so we can see the webpage.
487 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
488 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);