Android: Using html5 to determine geolocation in webview with javascript api

Question

I\'m currently having an issue with geolocation in a webview. I have a webapp. I\'m currently not using phonegap or any other mobile framework. I\'ve been unsuccessful at ge

Answer 1

You did try this html5webview class.

private HTML5WebView mWebView;
String url = "SOMEURL";
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mWebView = new HTML5WebView(this);
    if (savedInstanceState != null) {
        mWebView.restoreState(savedInstanceState);
    } else {
        mWebView.loadUrl(url);
    }
    setContentView(mWebView.getLayout());
}
@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    mWebView.saveState(outState);
}

Answer 2

Your problem may be the same problem with Android WebView using Geolocation.
I think HTML5 use local database, so you need add some HTML5 requirements like this

// HTML5 API flags
webView.getSettings().setAppCacheEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
webView.getSettings().setDomStorageEnabled(true);

Answer 3

Add onGeolocationPermissionsShowPrompt() to MyChromeWebViewClient as below:

private class MyChromeWebViewClient extends WebChromeClient {

    @Override
    public void onProgressChanged(WebView view, int progress) {
        // Activities and WebViews measure progress with different scales.
        // The progress meter will automatically disappear when we reach 100%
        activity.setProgress(progress * 100);
    }

    @Override
    public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
        Log.d(LOG_TAG, message);
        // This shows the dialog box.  This can be commented out for dev
        AlertDialog.Builder alertBldr = new AlertDialog.Builder(activity);
        alertBldr.setMessage(message);
        alertBldr.setTitle("Alert");
        alertBldr.show();
        result.confirm();
        return true;
    }

    public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
        callback.invoke(origin, true, false);
    }
}

You need to import "android.webkit.GeolocationPermissions".

Add this permission:

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

This will work I guess.

Answer 4

Sharing my Working activity class, this is a complete solution which can demonstrate

• Showing loading dialog while the web page is loading
• Ask for permission in marshmallow and above
• Handle webpage error
• check for the internet connection and open setting page
• Handling Geolocation permission with and without dialog

Hope it save someone's time

     /**
     * Created by Hitesh.Sahu on 3/24/2017.
     */

    public class WebViewActivity extends AppCompatActivity {

        final private int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 124;
        private int webViewPreviousState;
        private final int PAGE_STARTED = 0x1;
        private final int PAGE_REDIRECTED = 0x2;
        private CoordinatorLayout rootView;
        private WebView webView;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_webview);
            webView = (WebView) findViewById(R.id.webView);
            rootView = (CoordinatorLayout) findViewById(R.id.root_view);

            if (Build.VERSION.SDK_INT >= 23) {
                // Marshmallow+ Permission APIs
                fuckMarshMallow();
            }

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                if (0 != (getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE)) {
                    WebView.setWebContentsDebuggingEnabled(true);
                }
            }
            webView.setInitialScale(1);
            webView.getSettings().setLoadWithOverviewMode(true);
            webView.getSettings().setUseWideViewPort(true);
            webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
            webView.setScrollbarFadingEnabled(false);

            webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
            webView.getSettings().setBuiltInZoomControls(true);
            webView.setWebViewClient(new GeoWebViewClient());
            // Below required for geolocation
            webView.getSettings().setJavaScriptEnabled(true);
            webView.getSettings().setGeolocationEnabled(true);
            webView.setWebChromeClient(new GeoWebChromeClient());

            webView.getSettings().setAppCacheEnabled(true);
            webView.getSettings().setDatabaseEnabled(true);
            webView.getSettings().setDomStorageEnabled(true);

            webView.getSettings().setGeolocationDatabasePath(getFilesDir().getPath());

            webView.loadUrl("file:///android_asset/index.html");
        }

        /**
         * WebChromeClient subclass handles UI-related calls
         * Note: think chrome as in decoration, not the Chrome browser
         */
        public class GeoWebChromeClient extends android.webkit.WebChromeClient {
            @Override
            public void onGeolocationPermissionsShowPrompt(final String origin,
                                                           final GeolocationPermissions.Callback callback) {
                // Always grant permission since the app itself requires location
                // permission and the user has therefore already granted it
                callback.invoke(origin, true, false);

    //            final boolean remember = false;
    //            AlertDialog.Builder builder = new AlertDialog.Builder(WebViewActivity.this);
    //            builder.setTitle("Locations");
    //            builder.setMessage("Would like to use your Current Location ")
    //                    .setCancelable(true).setPositiveButton("Allow", new DialogInterface.OnClickListener() {
    //                public void onClick(DialogInterface dialog, int id) {
    //                    // origin, allow, remember
    //                    callback.invoke(origin, true, remember);
    //                }
    //            }).setNegativeButton("Don't Allow", new DialogInterface.OnClickListener() {
    //                public void onClick(DialogInterface dialog, int id) {
    //                    // origin, allow, remember
    //                    callback.invoke(origin, false, remember);
    //                }
    //            });
    //            AlertDialog alert = builder.create();
    //            alert.show();
            }
        }

        /**
         * WebViewClient subclass loads all hyperlinks in the existing WebView
         */
        public class GeoWebViewClient extends WebViewClient {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                // When user clicks a hyperlink, load in the existing WebView
                view.loadUrl(url);
                return true;
            }

            Dialog loadingDialog = new Dialog(WebViewActivity.this);

            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                super.onPageStarted(view, url, favicon);
                webViewPreviousState = PAGE_STARTED;

                if (loadingDialog == null || !loadingDialog.isShowing())
                    loadingDialog = ProgressDialog.show(WebViewActivity.this, "",
                            "Loading Please Wait", true, true,
                            new DialogInterface.OnCancelListener() {

                                @Override
                                public void onCancel(DialogInterface dialog) {
                                    // do something
                                }
                            });

                loadingDialog.setCancelable(false);
            }


            @RequiresApi(api = Build.VERSION_CODES.M)
            @Override
            public void onReceivedError(WebView view, WebResourceRequest request,
                                        WebResourceError error) {


                if (isConnected()) {
                    final Snackbar snackBar = Snackbar.make(rootView, "onReceivedError : " + error.getDescription(), Snackbar.LENGTH_INDEFINITE);
                    snackBar.setAction("Reload", new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            webView.loadUrl("javascript:window.location.reload( true )");
                        }
                    });
                    snackBar.show();
                } else {
                    final Snackbar snackBar = Snackbar.make(rootView, "No Internet Connection ", Snackbar.LENGTH_INDEFINITE);
                    snackBar.setAction("Enable Data", new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            startActivityForResult(new Intent(Settings.ACTION_WIRELESS_SETTINGS), 0);
                            webView.loadUrl("javascript:window.location.reload( true )");
                            snackBar.dismiss();
                        }
                    });
                    snackBar.show();
                }

                super.onReceivedError(view, request, error);

            }

            @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
            @Override
            public void onReceivedHttpError(WebView view,
                                            WebResourceRequest request, WebResourceResponse errorResponse) {

                if (isConnected()) {
                    final Snackbar snackBar = Snackbar.make(rootView, "HttpError : " + errorResponse.getReasonPhrase(), Snackbar.LENGTH_INDEFINITE);

                    snackBar.setAction("Reload", new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            webView.loadUrl("javascript:window.location.reload( true )");
                        }
                    });
                    snackBar.show();
                } else {
                    final Snackbar snackBar = Snackbar.make(rootView, "No Internet Connection ", Snackbar.LENGTH_INDEFINITE);
                    snackBar.setAction("Enable Data", new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            startActivityForResult(new Intent(Settings.ACTION_WIRELESS_SETTINGS), 0);
                            webView.loadUrl("javascript:window.location.reload( true )");
                            snackBar.dismiss();
                        }
                    });
                    snackBar.show();
                }
                super.onReceivedHttpError(view, request, errorResponse);
            }

            @Override
            public void onPageFinished(WebView view, String url) {

                if (webViewPreviousState == PAGE_STARTED) {

                    if (null != loadingDialog) {
                        loadingDialog.dismiss();
                        loadingDialog = null;
                    }
                }
            }
        }


        /**
         * Check if there is any connectivity
         *
         * @return is Device Connected
         */
        public boolean isConnected() {

            ConnectivityManager cm = (ConnectivityManager)
                    this.getSystemService(Context.CONNECTIVITY_SERVICE);

            if (null != cm) {
                NetworkInfo info = cm.getActiveNetworkInfo();
                return (info != null && info.isConnected());
            }

            return false;

        }

        @Override
        public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
            switch (requestCode) {
                case REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS: {
                    Map<String, Integer> perms = new HashMap<String, Integer>();
                    // Initial
                    perms.put(Manifest.permission.ACCESS_FINE_LOCATION, PackageManager.PERMISSION_GRANTED);


                    // Fill with results
                    for (int i = 0; i < permissions.length; i++)
                        perms.put(permissions[i], grantResults[i]);

                    // Check for ACCESS_FINE_LOCATION
                    if (perms.get(Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED


                            ) {
                        // All Permissions Granted

                        // Permission Denied
                        Toast.makeText(WebViewActivity.this, "All Permission GRANTED !! Thank You :)", Toast.LENGTH_SHORT)
                                .show();

                    } else {
                        // Permission Denied
                        Toast.makeText(WebViewActivity.this, "One or More Permissions are DENIED Exiting App :(", Toast.LENGTH_SHORT)
                                .show();

                        finish();
                    }
                }
                break;
                default:
                    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
            }
        }

        @TargetApi(Build.VERSION_CODES.M)
        private void fuckMarshMallow() {
            List<String> permissionsNeeded = new ArrayList<String>();

            final List<String> permissionsList = new ArrayList<String>();
            if (!addPermission(permissionsList, Manifest.permission.ACCESS_FINE_LOCATION))
                permissionsNeeded.add("Show Location");

            if (permissionsList.size() > 0) {
                if (permissionsNeeded.size() > 0) {

                    // Need Rationale
                    String message = "App need access to " + permissionsNeeded.get(0);

                    for (int i = 1; i < permissionsNeeded.size(); i++)
                        message = message + ", " + permissionsNeeded.get(i);

                    showMessageOKCancel(message,
                            new DialogInterface.OnClickListener() {

                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                    requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
                                            REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
                                }
                            });
                    return;
                }
                requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
                        REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
                return;
            }

            Toast.makeText(WebViewActivity.this, "No new Permission Required- Launching App .You are Awesome!!", Toast.LENGTH_SHORT)
                    .show();
        }


        private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) {
            new AlertDialog.Builder(WebViewActivity.this)
                    .setMessage(message)
                    .setPositiveButton("OK", okListener)
                    .setNegativeButton("Cancel", null)
                    .create()
                    .show();
        }

        @TargetApi(Build.VERSION_CODES.M)
        private boolean addPermission(List<String> permissionsList, String permission) {

            if (checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
                permissionsList.add(permission);
                // Check for Rationale Option
                if (!shouldShowRequestPermissionRationale(permission))
                    return false;
            }
            return true;
        }
    }