2 * Copyright 2015 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.WebResourceError;
47 import android.webkit.WebResourceRequest;
48 import android.webkit.WebView;
49 import android.webkit.WebViewClient;
50 import android.widget.EditText;
51 import android.widget.FrameLayout;
52 import android.widget.ImageView;
53 import android.widget.ProgressBar;
54 import android.widget.Toast;
55 import java.io.UnsupportedEncodingException;
56 import java.net.MalformedURLException;
58 import java.net.URLEncoder;
60 public class Webview extends AppCompatActivity implements CreateHomeScreenShortcut.CreateHomeScreenSchortcutListener {
61 // favoriteIcon is public static so it can be accessed from CreateHomeScreenShortcut.
62 public static Bitmap favoriteIcon;
64 private String formattedUrlString;
65 private String homepage = "https://www.duckduckgo.com/";
67 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
68 @SuppressLint("SetJavaScriptEnabled")
71 protected void onCreate(Bundle savedInstanceState) {
72 super.onCreate(savedInstanceState);
73 setContentView(R.layout.activity_webview);
75 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
76 final FrameLayout fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.fullScreenVideoFrameLayout);
77 final Activity mainWebViewActivity = this;
79 final ActionBar actionBar = getSupportActionBar();
80 if (actionBar != null) {
81 // Remove the title from the action bar.
82 actionBar.setDisplayShowTitleEnabled(false);
84 // Add the custom app_bar layout, which shows the favoriteIcon, urlTextBar, and progressBar.
85 actionBar.setCustomView(R.layout.app_bar);
86 actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
88 // Set the "go" button on the keyboard to load the URL in urlTextBox.
89 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
90 urlTextBox.setOnKeyListener(new View.OnKeyListener() {
91 public boolean onKey(View v, int keyCode, KeyEvent event) {
92 // If the event is a key-down event on the "enter" button, load the URL.
93 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
94 // Load the URL into the mainWebView and consume the event.
97 } catch (UnsupportedEncodingException e) {
100 // If the enter key was pressed, consume the event.
103 // If any other key was pressed, do not consume the event.
110 mainWebView.setWebViewClient(new WebViewClient() {
111 // shouldOverrideUrlLoading makes this WebView the default handler for URLs inside the app, so that links are not kicked out to other apps.
113 public boolean shouldOverrideUrlLoading(WebView view, String url) {
114 mainWebView.loadUrl(url);
118 /* These errors do not provide any useful information and clutter the screen.
119 public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
120 Toast.makeText(mainWebViewActivity, "Error loading " + request + " Error: " + error, Toast.LENGTH_SHORT).show();
124 // Update the URL in urlTextBox when the page starts to load.
126 public void onPageStarted(WebView view, String url, Bitmap favicon) {
127 if (actionBar != null) {
128 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
129 urlTextBox.setText(url);
133 // Update formattedUrlString and urlTextBox. It is necessary to do this after the page finishes loading because the final URL can change during load.
135 public void onPageFinished(WebView view, String url) {
136 formattedUrlString = url;
138 if (actionBar != null) {
139 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
140 urlTextBox.setText(formattedUrlString);
145 mainWebView.setWebChromeClient(new WebChromeClient() {
146 // Update the progress bar when a page is loading.
148 public void onProgressChanged(WebView view, int progress) {
149 // Make sure that actionBar is not null.
150 if (actionBar != null) {
151 ProgressBar progressBar = (ProgressBar) actionBar.getCustomView().findViewById(R.id.progressBar);
152 progressBar.setProgress(progress);
153 if (progress < 100) {
154 progressBar.setVisibility(View.VISIBLE);
156 progressBar.setVisibility(View.GONE);
161 // Set the favorite icon when it changes.
163 public void onReceivedIcon(WebView view, Bitmap icon) {
164 // Save a copy of the favorite icon for use if a shortcut is added to the home screen.
167 // Place the favorite icon in the actionBar if it is not null.
168 if (actionBar != null) {
169 ImageView imageViewFavoriteIcon = (ImageView) actionBar.getCustomView().findViewById(R.id.favoriteIcon);
170 imageViewFavoriteIcon.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
174 // Enter full screen video
176 public void onShowCustomView(View view, CustomViewCallback callback) {
177 getSupportActionBar().hide();
179 fullScreenVideoFrameLayout.addView(view);
180 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
182 mainWebView.setVisibility(View.GONE);
184 /* SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bars on the bottom or right of the screen.
185 ** SYSTEM_UI_FLAG_FULLSCREEN hides the status bar across the top of the screen.
186 ** SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the navigation and status bars ghosted overlays and automatically rehides them.
189 // Set the one flag supported by API >= 14.
190 if (Build.VERSION.SDK_INT >= 14) {
191 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
194 // Set the two flags that are supported by API >= 16.
195 if (Build.VERSION.SDK_INT >= 16) {
196 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN);
199 // Set all three flags that are supported by API >= 19.
200 if (Build.VERSION.SDK_INT >= 19) {
201 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
205 // Exit full screen video
206 public void onHideCustomView() {
207 getSupportActionBar().show();
209 mainWebView.setVisibility(View.VISIBLE);
211 fullScreenVideoFrameLayout.removeAllViews();
212 fullScreenVideoFrameLayout.setVisibility(View.GONE);
216 mainWebView.setDownloadListener(new DownloadListener() {
217 // Launch the Android download manager when a link leads to a download.
219 public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
220 DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
221 DownloadManager.Request requestUri = new DownloadManager.Request(Uri.parse(url));
223 // Add the URL as the description for the download.
224 requestUri.setDescription(url);
226 // Show the download notification after the download is completed if the API is 11 or greater.
227 if (Build.VERSION.SDK_INT >= 11) {
228 requestUri.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
231 downloadManager.enqueue(requestUri);
232 Toast.makeText(mainWebViewActivity, "Download started", Toast.LENGTH_SHORT).show();
236 // Allow pinch to zoom.
237 mainWebView.getSettings().setBuiltInZoomControls(true);
239 // Hide zoom controls if the API is 11 or greater.
240 if (Build.VERSION.SDK_INT >= 11) {
241 mainWebView.getSettings().setDisplayZoomControls(false);
244 // Enable JavaScript.
245 mainWebView.getSettings().setJavaScriptEnabled(true);
247 // Enable DOM Storage.
248 mainWebView.getSettings().setDomStorageEnabled(true);
250 // Get the intent information that started the app.
251 final Intent intent = getIntent();
253 if (intent.getData() != null) {
254 // Get the intent data and convert it to a string.
255 final Uri intentUriData = intent.getData();
256 formattedUrlString = intentUriData.toString();
259 // If formattedUrlString is null assign the homepage to it.
260 if (formattedUrlString == null) {
261 formattedUrlString = homepage;
264 // Load the initial website.
265 mainWebView.loadUrl(formattedUrlString);
269 public boolean onCreateOptionsMenu(Menu menu) {
270 // Inflate the menu; this adds items to the action bar if it is present.
271 getMenuInflater().inflate(R.menu.menu_webview, menu);
275 // @TargetApi(11) turns off the errors regarding copy and paste, which are removed from view in menu_webview.xml for lower version of Android.
278 public boolean onOptionsItemSelected(MenuItem menuItem) {
279 int menuItemId = menuItem.getItemId();
280 ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
281 ActionBar actionBar = getSupportActionBar();
282 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
284 // Sets the commands that relate to the menu entries.
285 switch (menuItemId) {
287 mainWebView.loadUrl(homepage);
291 mainWebView.loadUrl(formattedUrlString);
295 mainWebView.goBack();
299 mainWebView.goForward();
303 // Make sure that actionBar is not null.
304 if (actionBar != null) {
305 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
306 clipboard.setPrimaryClip(ClipData.newPlainText("URL", urlTextBox.getText()));
311 // Make sure that actionBar is not null.
312 if (actionBar != null) {
313 ClipData.Item clipboardData = clipboard.getPrimaryClip().getItemAt(0);
314 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
315 urlTextBox.setText(clipboardData.coerceToText(this));
317 loadUrlFromTextBox();
318 } catch (UnsupportedEncodingException e) {
325 // Make sure that actionBar is not null.
326 if (actionBar != null) {
327 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
328 Intent shareIntent = new Intent();
329 shareIntent.setAction(Intent.ACTION_SEND);
330 shareIntent.putExtra(Intent.EXTRA_TEXT, urlTextBox.getText().toString());
331 shareIntent.setType("text/plain");
332 startActivity(Intent.createChooser(shareIntent, "Share URL"));
336 case R.id.addToHomescreen:
337 // Show the CreateHomeScreenShortcut AlertDialog and name this instance createShortcut.
338 AppCompatDialogFragment shortcutDialog = new CreateHomeScreenShortcut();
339 shortcutDialog.show(getSupportFragmentManager(), "createShortcut");
341 //Everything else will be handled by CreateHomeScreenShortcut and the associated listeners below.
345 // Launch the system Download Manager.
346 Intent downloadManangerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
348 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
349 downloadManangerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
351 startActivity(downloadManangerIntent);
355 // Show the AboutDialog AlertDialog and name this instance aboutDialog.
356 AppCompatDialogFragment aboutDialog = new AboutDialog();
357 aboutDialog.show(getSupportFragmentManager(), "aboutDialog");
362 return super.onOptionsItemSelected(menuItem);
366 public void onCreateHomeScreenShortcutCancel(DialogFragment dialog) {
367 // Do nothing because the user selected "Cancel".
371 public void onCreateHomeScreenShortcutCreate(DialogFragment dialog) {
372 // Get shortcutNameEditText from the alert dialog.
373 EditText shortcutNameEditText = (EditText) dialog.getDialog().findViewById(R.id.shortcutNameEditText);
375 // Create the bookmark shortcut based on formattedUrlString.
376 Intent bookmarkShortcut = new Intent();
377 bookmarkShortcut.setAction(Intent.ACTION_VIEW);
378 bookmarkShortcut.setData(Uri.parse(formattedUrlString));
380 // Place the bookmark shortcut on the home screen.
381 Intent placeBookmarkShortcut = new Intent();
382 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
383 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
384 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIcon);
385 placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
386 sendBroadcast(placeBookmarkShortcut);
389 // Override onBackPressed so that if mainWebView can go back it does when the system back button is pressed.
391 public void onBackPressed() {
392 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
394 if (mainWebView.canGoBack()) {
395 mainWebView.goBack();
397 super.onBackPressed();
401 public void loadUrlFromTextBox() throws UnsupportedEncodingException {
402 // Make sure that actionBar is not null.
403 ActionBar actionBar = getSupportActionBar();
404 if (actionBar != null) {
405 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
406 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
408 // Get the text from urlTextInput and convert it to a string.
409 String unformattedUrlString = urlTextBox.getText().toString();
410 URL unformattedUrl = null;
411 Uri.Builder formattedUri = new Uri.Builder();
413 // Check to see if unformattedUrlString is a valid URL. Otherwise, convert it into a Duck Duck Go search.
414 if (Patterns.WEB_URL.matcher(unformattedUrlString).matches()) {
416 // Add http:// at the beginning if it is missing. Otherwise the app will segfault.
417 if (!unformattedUrlString.startsWith("http")) {
418 unformattedUrlString = "http://" + unformattedUrlString;
421 // 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.
423 unformattedUrl = new URL(unformattedUrlString);
424 } catch (MalformedURLException e) {
428 // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if .get was called on a null value.
429 final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
430 final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
431 final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
432 final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
433 final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
435 formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
436 formattedUrlString = formattedUri.build().toString();
439 // Sanitize the search input and convert it to a DuckDuckGo search.
440 final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
441 formattedUrlString = "https://duckduckgo.com/?q=" + encodedUrlString;
444 mainWebView.loadUrl(formattedUrlString);
446 // Hides the keyboard so we can see the webpage.
447 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
448 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);