I have never build chrome extension with flutter, i want to try it but i have a question.
Is it possible to build chrome extension with any flutter project ?
According to the article referenced:
Three steps…
Remove non-supported scripts from index.html
Navigate to web/index.html file and remove all the .. tags:
Then only insert the following tag inside the :
<script src="main.dart.js" type="application/javascript"></script>
Set the extension view dimensions
Extensions have a fixed dimension, so you need to explicitly specify the width and height values of the extension view inside the HTML.
Just replace the starting <html> tag with the following:
<html style="height: 600px; width: 350px">
This will set the extension view’s height and width to 600 pixels and 350 pixels respectively.
Make some changes in manifest.json
Navigate to web/manifest.json file and replace the entire content with the following:
{
"name": "QR Code Extension",
"description": "QR Code Extension",
"version": "1.0.0",
"content_security_policy": {
"extension_pages": "script-src 'self' ; object-src 'self'"
},
"action": {
"default_popup": "index.html",
"default_icon": "icons/Icon-192.png"
},
"manifest_version": 3
}
Trying out the extension
With the required changes done, you are ready to build and run it as a Chrome extension.
By default, when you run a Flutter web build using the following command:
flutter build web
It uses the HTML renderer for a mobile browser and CanvasKit renderer for a desktop browser.
To give a little bit of context, Flutter web has support for two types of renderers (according to the Docs):
HTML renderer
Uses a combination of HTML elements, CSS, Canvas elements, and SVG elements. This renderer has a smaller download size.
CanvasKit renderer
This renderer has faster performance with higher widget density (supports operation on pixel level) but adds about 2MB in download size.
But in order to use it as an extension, you have to specifically generate the build only using the HTML renderer. It can be done using the following command:
flutter build web --web-renderer html
🛑 Don’t run the command yet!
Finally, you have to use the --csp flag in order to disable the dynamic generation of code in the generated output which is necessary to satisfy CSP restrictions.
🟢 RUN this command:
flutter build web --web-renderer html --csp
You will find the generated files inside build/web folder present in your root Flutter project directory.
I haven't tried it but it might be possible to do so with flutter web. Just few changes here and there and it should be ready.
But there must be some limitations too.
Related
Getting api response like this
"sample_response":
{
"id": 1,
"icon": "fa-ambulance",
}
for static icon i used
icon: FaIcon(FontAwesomeIcons.gamepad),
How to load icon based on the json response
This is not supported by Font Awesome Flutter.
There is another package to help you with that: Icons Helper
However, if you try right now, you will see that Icons Helper refers to an adobe icon that does not exist anymore. It has been removed from the package in the master on Git but not yet on PubDev.
You could also just integrate icons_helper.dart in your project and maintain the map you need in your app.
I have implemented Barcode Scanner for my Ionic project for both iOS and Android.
But when my Scanner starts, I want to add a button inside the view and add an event to it.
I am using phonegap-plugin-barcodescanner plugin
Please help me with how to append something inside the scanning view.
If you want to add stuff to the layout of your scanner, you need to write code in the plugin itself.
YOU CANNOT INTERACT DIRECTLY WITH THE SCANNER FROM THE JS.
In fact, the plugin you use uses cordova.exec in order to launch the scanner view by passing it arguments.
For Android, you just have to know Java and some XML.
For iOS, you have to know Objective-C / Swift.
For Android, you may have 4 files to modify :
plugin.xml : home of all you dependencies
Your_Activity.java : java file which permits to interact with the scanner view itself by calling buttons, textviews, layouts, etc...
Your_Main.java : java file which gets and returns parameters from the js file of your plugin
Your_Layout.xml : xml file in res/layout which is composed of xml attributes interpreted by java
Beside that, I found two good plug-ins for cordova/ionic apps from GitHub :
phonegap/phonegap-plugin-barcodescanner
tjwoon/csZBar
And there's the expensive one, Scandit, which resolves all of your problems for about 200$ per month, check the pricing for every solution they propose.
If you use their SDK, you may be able to interact with the scanner view from js files because of their work, but they're the only company I know to do that. (perhaps ManateeWorks...)
Under this part is what I've been doing since mid-July, in order to give you ideas.
I'm currently making an ANDROID scanner layout for my ionic app.
You can find my GitHub repository here, I forked it from tjwoon's csZBar and I added some stuff my ionic app needs.
I guarantee nothing, but I'm pretty sure I'll implement an iOS layout soon (at least I'll try), and unfortunately I don't really know android / iOS mobile programming.
Here's a screenshot of the layout
I made a "tab bar" composed of 3 image buttons, a "top bar" composed of text views & image buttons. The scanner is embedded between these two.
There are pop-ups for the app's features, which pause the scanner and respond to click events.
See the README and Java files (csZBar/android/) for more information.
Don't hesitate to ask questions and/or inspect my code.
Warning
1) It's currently on development so use it at your own risks (use branch master, not develop)
2) I only modified the android part, not the iOS!
3) It doesn't work for Windows phone...
After adding plugin, installngCordova with bower install ngCordova
Add link to ng-cordova.js JS file above reference to cordova.js:
index.html
<script src="lib/ngCordova/dist/ng-cordova.js"></script>
<script src="cordova.js"></script>
Also, don't forget to add ngCordova module:
app.js
angular.module('myApp', ['ngCordova'])
Now you're ready to use the plugin like this:
Controller:
var module = angular.module('starter.controllers', []);
module.controller('BarcodeCtrl', function($scope, $cordovaBarcodeScanner, $ionicPlatform) {
$ionicPlatform.ready(function(){
$scope.scan = function() {
$cordovaBarcodeScanner
.scan()
.then(function(barcodeData) {
alert(JSON.stringify(barcodeData));
}, function(error) {
alert(error);
});
};
});
});
View:
<button ng-click="scan()">Scan</button>
I am just getting started with Ionic 2. I have created an img file in app inside it is a file logo.png. So I have created the following code:
css:
.getting-started {
.logo {
background-image: url(./img/logo.png);
}
}
html:
<ion-col offset-33 width-33 class="logo"><h1>Logo</h1></ion-col>
<h3>Welcome to your first Ionic app!</h3>
</ion-content>
I know the css is working, as if I toggle the background color, I get the expected results. However, I don't get any background image, just the Logo text specified. Where should I have put the image file?
EDIT: As of Ionic 2 RC 0, the correct place to put your images is in src/assets/img/ and the correct code to reference the image is <img src="assets/img/myImg.png">. Please see Ionic's change log for RC0 (specifically #28).
As of right now, using the official Drifty Co. Ionic 2 Conference App as a reference, images should be placed inside of the www/ directory.
In my current Ionic 2 app, an image is located at www/img/logo.png and it is referenced in app/pages/page_name/page_name.html as <img src='img/logo.png'> and it works like a charm.
Currently using:
ionic-angular v2.0.0-beta.6 (package.json)
ionic-native ^1.1.0 (package.json)
ionic-cli v 2.0.0-beta.25 (installed CLI)
Using Ionic 2 beta 6, I handled this with a simple gulp task. I dropped my images in app/assets/images (this path is completely arbitrary). Then, I added the following task to gulpfile.js:
gulp.task("assets", function() {
return gulp.src(["app/assets/images/*"])
.pipe(gulp.dest("www/build/images"));
});
You'll also need to update the watch and build tasks to include the new assets task in their calls to runSequence(). I don't believe the order of tasks in the sequence matters, in this case:
gulp.task("build", ["clean"], function(done) {
runSequence(
["sass", "html", "fonts", "assets", "scripts"],
function() {
buildBrowserify().on("end", done);
}
);
});
If you output your images to the same path as I did, then you would reference your images in CSS from ../images/image-name.png and in <img> tags from build/images/image-name.png. I have confirmed that these images are visible both from the browser and an Android device. I don't think it should be any different for iOS.
The assets folder is the correct folder to place any media.
The location of my image:
fyi: if you dont have the folder, just create it
src > assets > img > background.png
variables.scss
.backgroundImage {
background-image: url('../assets/img/background.png');
}
Then on the page I want to use it on:
home.html
<ion-content padding class="backgroundImage">
</ion-content>
You can also reference images the following way:
home.html
<ion-content padding class="backgroundImage">
<img src="./assets/img/background.png" width="50%" />
</ion-content>
www\lib\ionic inside ionic create one folder img
now your path
www\lib\ionic\img put your background image inside this img folder and in your
www\lib\ionic\css\ionic.css
inside ionic.css find .view-container class and past this line.
.view-container {
background: url("../img/main_bg.jpg") repeat scroll 0 0 / 100% 100%;
}
OK, so I found the answer on the IONIC forum. The images go in www/img, the paths to these is then:
url('../../img/appicon.png')
when referenced from css or html in a page folder which is in pages in app.
Hope this helps anyone in the future.
I was having same problem, I found a way, I don't know if is the best way, but it's work.
the images must go on a file sibling to build, inside folder www
www
build
img
Got the solution. Its using path relative to index.html and not template folder.
So we need use path without../
src="img/John_Williams.jpg"
This works both on browser and apk
I could not manage to make it work using a PNG file. It worked in the browser but when I build the app and deployed to a device it did not displayed.
Instead of fiddling with the Gulp file to understand what was going on, I figured out a simpler workaround :
Inline the image into your HTML (or CSS) using a Data URI.
There are many tools online such as this one that will convert your PNG to a Base64 data URI.
If your image is pool.jpg. Place it in /src/assets/img/pool.jpg
It needs to be in this directory (assets) as it is your source from where everything gets built.
Then stop your ionic serve command (Ctrl-C) or whatever you use.
Then delete EVERYTHING under www directory (it all gets rebuilt anyway).
Then restart your server by running 'ionic serve' again.
This will rebuild the directory with the images.
You can reference the image as background-image: url('../assets/img/pool.jpg');
in your code.
I am using ionic 3 and it's a shame it doesn't pick up changes in the assets directory. IONIC should look at this.
I 'm currently on ionic version 3.6 and I had to use this to work:
src="../../assets/img/myImage.jpg"
The path assets/img/myImage didn't work for me
I hope this helps
Hi Guys i found a method add images to ionic v2
Create a images folder in "www" directory (www/images/) and add your all images in this path.
Then give your image path like this
ex: for pages
src="images/logo.png"
in CSS
.ThemeColor{ background: url(/images/bg.png)};
That's it, works for me..
Thanks
I'm developing an hybrid app on MobileFirst 7.1, with Ionic libraries.
In a .js file I globally define
var busyIndicator = new WL.BusyIndicator ("content", {text: "DUMMY TEXT"});
but when I call for it to show, i.e.
busyIndicator.show();
I always get the same message, ignoring the text I put in the text field:
Image link here
I'm testing this on Android devices (Huawei P7 Ascend, Samsung Galaxy J5, both with Android 5.1). On the Android Mobile Simulator the message displays just fine.
p.s. "content" matches my html id, I tried putting null instead of "content" but to no avail.
A workaround
define in some common .js file
function showMyIndicator() {
busyIndicator.__options.text="Custom loading text";
busyIndicator.show();
}
and call showMyIndicator() each time you would call busyIndicator.show().
busyIndicator.hide() can be called normally (although you might want to define some 'hideMyIndicator()' function for homogeneity).
What is happening?
It appears that, as soon as I load (jQuery $.load() ) some new content in order to change page, the text fileld of the busyIndicator object defaults to "[(')ههههههه Loading]", which is defined in every native project inside messages.json.
That file is full of those weird signs, no idea about why.
Update
There's something corrupted in my project which causes those .json files to be generated with wrong characters, a freshly generated project didn't show the same issues so creating a new one and move the resources in there might do the trick.
We have a web view in our app which is being detected as a single webpage element (android.webkit.WebView). not showing the layout hierarchy to inspect individual UI components. I have tried to inspect the elements using 'UI Automator Viewer' and 'Appium Inspector' and same results. Is there any other tool which can be used for inspecting web views? Please advise!
UIAutomatorViewer is able to see native elements only. Everything underneath WebView is web elements. You need to switch from native to web context.
Link
This functionality was broken in Android Lollipop but appears to have recently been fixed with Android System Webview v44, try upgrading webview and inspecting then