So if you create IDs, you should be using ViewCompat.generateViewId() to do it safely. But findViewById is something you generally want to avoid in the first place. It is slow. That's why View Binding is provided, to cache the views so you don't have to keep se...
=nulloverridefunonCreate(savedInstanceState:Bundle?){super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) myWebView = findViewById(R.id.webview) myWebView!!.settings.javaScriptEnabled =truemyWebView!!.settings.domStorageEnabled =truemyWebView!!.settings.setSupportMultipl...
To use this, add this to your gradle build file: implementation 'org.osmdroid:osmdroid-shape:VERSION' In Kotlin val folder: List<Overlay> = ShapeConverter.convert(mapView, File(myshape)) mapView.overlayManager.addAll(folder) mapView.invalidate() Where myshape is a .shp file somewhere on th...
layout.activity_main) title = "KotlinApp" textView = findViewById(R.id.textView) try { val emp = JSONObject(jsonString).getJSONObject("Employee") val empName = emp.getString("Name") val empSalary = emp.getInt("Salary") val string = "Employee Name: $empNameEmployee Salary: $emp...
Use setOnClickListener() Without a Callback in Kotlin Go to the MainActivity class of Kotlin and paste the following code into the onCreate() method just after the setContentView() method. val clickMeBtn: Button = findViewById(R.id.click_me_btn) clickMeBtn.setOnClickListener { val toast...
Kotlin: val binding = SomeLayoutBinding.bind(someLayoutRoot/* should be a View instance */) Java: SomeLayoutBinding binding = SomeLayoutBinding.bind(someLayoutRoot/* should be a View instance */); For example, if you wanted to use the binding class in a Fragment, it would look something ...
We’re also addedsuspendin each function, except thegetNotes(), to use them inside a coroutine later on. Roomalso supportsKotlin Flow, which can update the UI automatically every time we make a change to the list. In other words, we observe the changes. ...
An important use of cursors in Android is to use aCursorAdapteras data source forListViews,AutoCompleteTextViewsand so on. When working with Loaders you have to adapt the old way slightly. First of all: You do not have a Cursor object before theonLoadFinished()method of your callback has ...
These existing code templates (available in Java and Kotlin) can help you quickly kick-start your project. One such template can be used to create a bottom navigation bar. To use this handy feature for a new project, first fire up Android Studio. Enter the application name and click ...
Kotlin compares favorably with other languages thanks to interoperability, safety, clarity, and tooling support. But the main differentiator is that a Kotlin class necessitates less code, which helps cut down the amount of boilerplate code. This allows developers to say goodbye to findViewByIds. ...