Mobile Development Forum

## Introduction ## In Android development, UseCases are classes that encapsulate business logic that are often used in ViewModel classes. UseCases belong to the optional Domain layer in Android apps, so they are not required, but can reduce your ViewModel’s complexity and make your application easier to test. In this …

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## Introduction ## If your App only need a simple way to play videos on Android, then **VideoView** (`android.widget.VideoView`) might just fit the bill. In this tutorial, we will learn how to use VideoView for video playback in our App. ## Goals ## At the end of the tutorial, you …

## Introduction ## Android provides many ways to perform background tasks, such as Services, WorkManager, or even threads. In this tutorial, we will learn how to create a Service for our Android app. ## Goals ## At the end of the tutorial, you would have learned: 1. How to create …

## Introduction ## When using a Worker (**from the WorkManager library**), you might have wondered how to inject dependencies with Hilt. In this tutorial, we will learn how to inject dependencies into our Worker. ## Goals ## At the end of the tutorial, you would have learned: 1. How to …

## Introduction ## Finding a View in Espresso tests can be quite confusing because there are so many matchers available. In this tutorial, we will learn how to find a View based on its sibling contents. ## Goals ## At the end of the tutorial, you would have learned: 1. …

Hello there. I'd like to develop a mobile app with cutting-edge functionality. A rider app, a passenger app, and an admin portal are all included. It is necessary to register and edit your profile. Can someone provide me with a cost estimate for app development? or else any other way …

I'm broadcasting an intent in my app and receiving it with a broadcast receiver. I can handle the broadcasting and receiving. No problem with that. However, I want to register the receiver completely programmatically instead of doing it in the manifest file. Notice, that in the manifest file, there are …

## Introduction ## When working with Room, you might have wondered how to describe one-to-many relationships between entities. In this tutorial, we will learn how to do just that. ## Goals ## At the end of the tutorial, you would have learned: 1. How to define one-to-many relationship for entities …

## Introduction ## When working with Room, you might have wondered how to run multiple statements in a single transaction. Running multiple statements in one transaction has two main benefits: 1. Your statements can reuse the same connection. 2. They can all fail together if something goes wrong. Regarding the …

## Introduction ## When working with Services on Android, you might have ran into an issue where you would like to: 1. Use a concrete implementation of a Service (*from a built-in or third party library*). 2. Make the Service lifecycle-aware so that you can use coroutines with it. Many …

## Introduction ## There are many ways to describe relationships between Entities in Room, one of which is to embed an entity inside of another. When embedding an Entity, the columns of the embedded Entity are extracted as member columns of the enclosing entity. In this tutorial, we will learn …

Hello, my name is Nicholas, and I'm the owner of a taxi service in Miami. I recently started a cab service with the support of a few friends. This firm has taken a lot of time and work to build. So far, we haven't been able to uncover anything that …

## Introduction ## When working with Room, there might come a situation during bulk CRUD operations that it would be useful to add a Foreign Key to one of our tables. This provides two main benefits: cascading delete (*must be configured manually*) and enforcing data integrity on linked entities. In …

## Introduction ## If your Android Application uses Room, then you might have wondered how to prepopulate a Room database. In this tutorial, we will learn how to prepopulate a Room database. ## Goals ## At the end of the tutorial, you would have learned: 1. How to prepopulate a …

## Introduction ## When working with music files, you might have wondered how to load display art from Audio files. In this tutorial, we will learn how to load thumbnails for audio files. ## Goals ## At the end of the tutorial, you would have learned: 1. How to load …

I have been trying to connect to watermelonDB however i keep getting this error TypeError : null isnot an object (evaluating 'DatabaseBridge[methodName]') I looked all over the network but couldn't find a solution the problem that i am not generting or writing the DataBaseBridge it should be generated automatically with …

hi there i have a python http post request with no request but theres the code: requests.post("https://api.i66v1xg2.org/v3/moderate/+" + userid + "/") i dont know how to make it in java and in okhttp3 help pls thanks

## Introduction ## When working with Hilt, you might have wondered how to inject ViewModels into your application. In this tutorial, we will learn how to inject ViewModels into your app Fragments. ## Goals ## At the end of the tutorial, you would have learned: 1. How to inject ViewModels …

## Introduction ## In Android development, reusable layouts can be used to reduce duplicate code across XML files. In this tutorial, we will learn how to reuse layout files, especially with View Binding enabled. ## Goals ## At the end of the tutorial, you would have learned: 1. How to …

In my hometown, I'm a budding entrepreneur with a cab business that I'd want to develop to meet current market demands. It would be more expensive to create a mobile app for both iOS and Android. As a result, I resorted to Android to build my own taxi booking application. …

## Introduction ## When working with a Room database, we are mostly restricted to save data using primitives (*and boxed primitives*). Reference types are not supported right out of the box, but can be enabled by creating additional [TypeConverter](https://developer.android.com/reference/androidx/room/TypeConverter). If you are familiar with ORM-light frameworks such as Spring JDBC, …

## Introduction ## MediaPlayer (`android.media.MediaPlayer`) is a popular way to play media files, and combining it with a SeekBar can greatly improve the user experience. In this tutorial, we will learn how to synchronize a MediaPlayer progress to a SeekBar position. ## Goals ## At the end of the tutorial, …

## Introduction ## In this tutorial, we will learn how to add swipe-to-remove and drag-to-reorder functionalities into RecyclerView. ## Goals ## At the end of the tutorial, you would have learned: 1. How to add swipe-to-remove and drag-to-reorder functionality to a RecyclerView. ## Tools Required ## 1. Android Studio. The …

## Introduction ## When using Navigation Components, you might have wondered how to pass arguments between destinations. We will learn how to do just that in this tutorial. This tutorial also builds upon the [Basic Navigation](https://www.daniweb.com/programming/mobile-development/tutorials/536923/android-native-how-to-use-navigation-component#post2282945) tutorial, so if you are not familiar with Navigation Components, I would recommend you …

## Introduction ## If you are working on a native Android app using the View system, then you might have come across a situation where you would need to add a Composable (`androidx.compose.runtime.Composable`) into your View hierarchy. In this tutorial, we will learn how to add a Composable into an …

## Introduction ## Among all of the animation API’s on Android, MotionLayout is one of the best classes to use to create complex animations. It can animate property and motion of multiple views at the same time. Other benefits include declarative style XML and the intuitive **Motion Editor** built right …

## Introduction ## If you are working with the latest Material 3 libraries on Android, you might have wondered how to use the **Bottom Navigation Bar** in your App. In this tutorial, we will learn how to use the Material 3 Bottom Navigation Bar (BNB). ## Goals ## At the …

## Introduction ## Proto DataStore is a great way to store the **permanent** state of your application, especially if you prefer type safety. In this tutorial, we will learn how to store our App state using the Proto DataStore. ## Goals ## At the end of the tutorial, you would …

 Hello i want to retrieve multiples values from single column on db. And i did. They are shown on Console (Painting, Illustration, Graphic Design) but when i put the values on ion-toggles with ngModel only one is set to true. As you may see on the screenshot the values …