Add support for 'tel', 'sms', 'mailto' and 'whatsapp' URL schemes

Author: ocram

Source/library/src/main/java/im/delight/android/webview/AdvancedWebView.java

@@ -6,6 +6,7 @@
  * Licensed under the MIT License (https://opensource.org/licenses/MIT)
  */
 
+import android.content.ActivityNotFoundException;
 import android.view.ViewGroup;
 import android.app.DownloadManager;
 import android.app.DownloadManager.Request;
@@ -522,6 +523,47 @@ public boolean shouldOverrideUrlLoading(final WebView view, final String url) {
 					}
 				}
 
+				final Uri uri = Uri.parse(url);
+				final String scheme = uri.getScheme();
+
+				if (scheme != null) {
+					final Intent externalSchemeIntent;
+
+					if (scheme.equals("tel")) {
+						externalSchemeIntent = new Intent(Intent.ACTION_DIAL, uri);
+					}
+					else if (scheme.equals("sms")) {
+						externalSchemeIntent = new Intent(Intent.ACTION_SENDTO, uri);
+					}
+					else if (scheme.equals("mailto")) {
+						externalSchemeIntent = new Intent(Intent.ACTION_SENDTO, uri);
+					}
+					else if (scheme.equals("whatsapp")) {
+						externalSchemeIntent = new Intent(Intent.ACTION_SENDTO, uri);
+						externalSchemeIntent.setPackage("com.whatsapp");
+					}
+					else {
+						externalSchemeIntent = null;
+					}
+
+					if (externalSchemeIntent != null) {
+						externalSchemeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+						try {
+							if (mActivity != null && mActivity.get() != null) {
+								mActivity.get().startActivity(externalSchemeIntent);
+							}
+							else {
+								getContext().startActivity(externalSchemeIntent);
+							}
+						}
+						catch (ActivityNotFoundException ignored) {}
+
+						// cancel the original request
+						return true;
+					}
+				}
+
 				// route the request through the custom URL loading method
 				view.loadUrl(url);