I need to send a notification (not necessarily a push notification) through an android webview. I saw that the Notification API was not compatible with Android Webview on MDN. The other APIs I saw seemed to be based off of window.notification.
Does anyone know of any API or JS that sends a notification through an android webview?
I saw this post from 6 months ago with essentially no activity except a vague mention of firebase. Would that be helpful?
Thanks for your answers!
I don't have enough "reputation" to post a comment but could that be useful to you?
Android Push Notification with WebView?
https://github.com/ashraf-alsamman/android-webview-app-with-push-notification
https://medium.com/shibinco/creating-a-webview-android-app-with-push-notification-7fd48541a913
Hopefuly you can make it work from one of those example
Read the documentation entry for Binding JavaScript code to Android code.
This allows you to use javascript to trigger the execution of android code.
First you have to register the Javascript Interface on android, so that you can trigger android code from javascript.
JAVA
WebView webView = (WebView) findViewById(R.id.webview);
webView.addJavascriptInterface(new WebAppInterface(this), "Android");
And define a method which does your action if the javascript is called. In this example show a toast.
public class WebAppInterface {
Context mContext;
/** Instantiate the interface and set the context */
WebAppInterface(Context c) {
mContext = c;
}
/** Show a toast from the web page */
#JavascriptInterface
public void showToast(String toast) {
Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
}
}
↑ You need to change that part to show your push notification instead. ↑
Then you can trigger the android code from javascript like this:
<input type="button" value="Say hello" onClick="showAndroidToast('Hello Android!')" />
<script type="text/javascript">
function showAndroidToast(toast) {
Android.showToast(toast);
}
</script>
I did not tried it myself. But I would try to create a javascript method which makes an ajax request to a server in certain intervals and checks if there are new notifications to send and if true then call the android code to show the message.
However, you will have to make sure to only show the notification once somehow... maybe set a cookie containing the notification ID and set it to true, so that the android code is not getting triggered again.
You would need to provide the notifications for example as a .json file in JSON format. You can upload that .json file to your webserver somewhere. Then pass the content to android and parse it accordingly.
One Simple workaround use JSInterafce - communicate webview to native.tutorial
In that JSInterface pass, the desired parameter for notification and then use android system notification API to generate the notification.
Related
I'm attempting to create and Android service that performs a task using JavaScript. I came across this post which describes how to run JavaScript code inside of a WebView within a Service using the WindowManager. I am able to create a WebView with an .html and .js file with no problem. It is once I try to pass data from the android .java service to the WebView that I run into an issue.
I have tried doing so in this fashion:
final WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
...
wv = new WebView(this);
wv.setWebViewClient(new WebViewClient());
wv.getSettings().setJavaScriptEnabled(true);
wv.loadUrl("file:///android_asset/www/test.html");
windowManager.addView(wv, params); // params set using method from linked post above
wv.evaluateJavascript("console.log('hello');", null);
wv.loadUrl("javascript:console.log('blah')");
Neither the call to evaluateJavascript() nor loadUrl() appear to have any effect on the WebView (I access the console using the chrome developer tools).
I have tested that in test.html I can add a <script> tag and output text to the console with no issue.
I've also tried calling the functions before adding the view to no avail.
What kind of data you want to pass to Javascript? You could use the WebView.addJavascriptInterface() to "Plant" methods on the HTML document so you can call them from Javascript, invoke in native and return data back to Javascript. Will that help?
If you're trying to execute this from a Service, you'll need to post a Runnable on the UI thread. Read the doc for evaluateJavascript()
It explicitly says it must be called on the UI thread. I think you can just do:
wv.post(new Runnable(){
#Override public void run()
{
wv.evaluateJavascript();
}
});
Other than that, should you include tags?
I am developing a web app using sencha touch for all mobile devices. My application uses GPS feature. I would like to know how can I navigate to the native setting screen of the phone from my web app for the user to switch ON the GPS feature.
If the GPS is not ON, it will prompt user a popup which will take the user to location settings screen to turn ON the GPS.
Is this possible ?
Please let know. I have seen this feature in many apps, even in google maps.
It is not cording practice to do that. You can simply state the steps to be followed.
IF you are running webapp on Phonegap or Android web view, then you can do like this.
Read this article how to bind Javascript function to Native app.
http://developer.android.com/guide/webapps/webview.html#BindingJavaScript
Android Code
public class WebAppInterface {
/** Show a toast from the web page */
#JavascriptInterface
public void goToSettingPage() {
startActivityForResult(new Intent(android.provider.Settings.ACTION_SETTINGS), 0);
}
}
WebView webView = (WebView) findViewById(R.id.webview);
webView.addJavascriptInterface(new WebAppInterface(this), "Android");
JavaScript Code
<input type="button" value="Say hello" onClick="openSettingPage()" />
<script type="text/javascript">
function openSettingPage() {
Android.goToSettingPage();
}
</script>
I have a simple native Android app that is a webview of a website, effectively to make the mobile-ready site native-like if you will. The website already has Google Analytics installed.
What might be a good way to track which visitors are using the app?
I could adding Android Native App Tracking, but I presume that would
double track the users. Unless it's smart enough to connect the visits?
I could pass custom get variable to the site that maybe adds a custom
attribute to the tracking for native app users. But that doesn't
sound very clean.
What might be best for tracking? I feel there's got to be an obvious answer I'm missing.
that should help you:
Now getting back to the Analytics tracking of this web app, I used the code provided by Google here.
So the code becomes somewhat like this.
public class myWebApp extends Activity{
Webview mWebview;
GoogleAnalyticsTracker tracker;
protected void onCreate(Bundle savedInstanceState) {
tracker = GoogleAnalyticsTracker.getInstance();
// Start the tracker in manual dispatch mode. The following UA-xxxxxxx-x code must be replaced by //your web property ID.
tracker.startNewSession("UA-xxxxxxx-x", this);
mWebview = new WebView(this);
mWebview .setWebViewClient(new myWebViewClient());
mWebview .loadUrl("file:///android_asset/www/index.html");
private class myWebViewClient extends WebViewClient
{
//After the user visits a particular page, send the tracking notification to GoogleAnalytics.
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon)
{
tracker.trackPageView( mWebview.getUrl());
tracker.dispatch();
}
}
}
http://www.the4thdimension.net/2011/11/using-google-analytics-with-html5-or.html
And in stats of google analytics you should get some info at least about operating system android.
I'm Developing an android application.
I've created some codings using HTML5 and javascript for android. And created a signature capturing application in Native JAva
I wanted to include the Native Signature capture coding in the HTML5 application. Because the signature capturing in the HTML5 is not working perfect for touch devices.
is it possible to call a native android activity from the HTML5 phonegap android application????
Yes, it is possible.
For doing the same you need to add cordova lib to your android project and moreover create a plugin in android by extending the Plugin class.
The overrided method named execute() is there that you can call from your javascripts.
Remember you need to define the path of the class containing execute folder to the config.xml.
Please visit below for complete guide.
Android Plugin
Any Java Native code call be called without using any plugin as following.
Follow The following Steps.
1) Replace the following code with your existing DroidGap Activity.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.init(); // Calling this is necessary to make this work
appView.addJavascriptInterface(this, "MainActivity");
/* "this" points the to the object of the current activity. "MainActivity" is used to refer "this" object in JavaScript as in Step 3. */
super.loadUrl("file:///android_asset/www/index.html");
}
2 Add the custom function in current (this) activity as following.
public void customFunctionCalled() {
Log.e("Custom Function Called", "Custom Function Called");
}
3 Now call this function from your HTML/JavaScript code as following.
<script type="text/javascript">
function callNewActivity() {
window.MainActivity.customFunctionCalled();
}
I am working on taking readings about web browser performance and so need to access the window.performance object of the browser.
To collect this data i have written a javascript file, collect.js which i need to add to the DOM of the page that i need to test eg. www.google.com, www.facebook.com and so on...
Also i need to run this test for about 1000 websites, any manual approach is out of the question. I need it to be automated somehow.
How could i go about doing this?
EDIT: I need to run these tests on an android browser, so i need mobile oriented solutions.
You can create a simple android app with a WebView component. This way you can control which URLs are loaded and also insert your JS code.
http://developer.android.com/guide/tutorials/views/hello-webview.html
EDIT
You can run any javascript like this:
Implement a custom WebView:
public class WebClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
// Execute your javascript below
view.loadUrl("javascript:...");
}
}
If you are looking for an automated solution, try PhantomJs this provides an automated headless web browser. Also has access to network traffic
perhaps you can try "bookmarklet"
http://www.bookmarklets.com/
the advantage over greasemonkey script is that it can run on
firefox and explorer