jsinterface | round demo of the interaction between APP and JS | iOS library

I am trying to create a file in the external storage. I have added the permission in manifest file and also added checkPermission function before calling createNewFile() function. But I am still getting Permission Denied error.

Manifest file

In Android I can add javascript interface:

I have an Android App that uses webview, and lately I'm trying to figure out how to add a dark theme by using the new @media (prefers-color-scheme: dark) CSS syntax. I have the correct CSS written on my page, and if I open it in Chrome with the dark mode of Chrome turning on, it works. I also have my AppTheme inheriting Theme.AppCompat.DayNight, and my app shows dark loading dialog etc. when I turn on dark mode for the entire OS on my device. Even the auto-complete options for the elements become dark. But still, the webpage loaded with my webview doesn't turn dark. According to this page, webviews should support this feature, but I just can't get it to work. What am I missing here?

I also just found out that in API 29 there's this WebSettings.setForceDark() method; could it be the thing I'm looking for? I hope to find a solution that works with lower API level though.

By the way, my current workaround is to inject a JavaScript interface like this:

I'm developing an Android application that contains a WebView. I am trying to override onKeyDown activity's method.

I want to call a javascript method everytime phone's backButton is pressed and if the method is undefined I want to execute other native instruction (I want to close the activity).

This is the sense: natively I do this

I have stored a website locally in my assets folder (i.e. HTML, CSS and Javascript files). Using a WebView, I can display the website on any phone I tried with Android 9, emulated or hardware. But when the API is lower than 28, the WebView is blank (apparently because the Javascript does not load; the website needs Javascript to display anything). This is the code I use:

I have one activity with a webview in it. When the user interacts with the webview, it does this through the JavaScriptInterface so both the app and webview can interact with each other. I believe the class is by default static, so I've found not too much can be done without it extending MainActivity.

EDIT: I realised I'm thinking about it with the wrong mindset, I need to 'return' the values inputted in the dialog box. Title updated to reflect this. The dialog fragment is called from onNavigationItemSelected. How do I get these values 'returned' from the dialog box to the main activity to use? I can't call a mainactivity method from the dialog box in the onclicklistener, it says "non-static method cannot be referenced from a static context".

I have a webview in my MainActivity, which my app is based around and everything else is fragments or dialog boxes. I need to be able to get reference to this webview so I can do something with it, according to what the user puts in the dialog box.

I have a JavaScriptInterface class for interacting with the webview which I had the same issue with, but sorted it by extending it to MainActivity (whether this is the best method I don't know, probably not).

In dialogs and other classes I can't do this as it needs to extend other things, i.e. Dialog etc. So how can I get reference to it from these classes?

MainActivity:

I am trying to make hydrid application in which there is a "button" on HTML page .whenever I click on that button i want to call android code function (which is working fine when I called test function from javascript) .Now I want to capture image on button click I take help from below url. Capture Image from Camera and Display in Activity I do like this package com.example.myapp.myapplication;

I am trying to make hydrid application in which there is a "button" on HTML page .whenever I click on that button i want to call android code function (which is working fine when I called test function from javascript) .Now I want to capture image on button click I take help from below url. Capture Image from Camera and Display in Activity I do like this package com.example.myapp.myapplication;