Mobile Development Forum

I have developed a game for android mobiles ["Rise Up Air Balloon"](https://play.google.com/store/apps/details?id=com.abacus.riseup). I want to updatte it. Kindly suggest me something if it is better to update https://lh3.googleusercontent.com/rB-fPEBiaGzT_ubSzCtSfftC4pKkIm5buAS2_DhQz4_exYFCrjbcN2T1NhkmM0A3Jj0=s180-rw

Hello, I am newbie and start learning Android mobile programming using react native.. I encounter a problem using setState state, it's keep show an error : **"Can't find variable : setState"** import React, { Component } from 'react'; import { AppRegistry, StyleSheet, Text, View, } from 'react-native'; export default class …

Can any one tell me that which tool is the best for me for the mobile develoment also which language is the must for me to first learn thanks for reading guys

According to the boffins at Kaspersky Lab, users of Android devices running Gingerbread (Android 2.3.6) and Ice Cream Sandwich (Android 4.0.4) are targeted the most by cybercriminals. Gingerbread accounted for 28% of all the attempts to install malware that were successfully blocked by Kaspersky, while Ice Cream Sandwich accounted for …

News reports suggest that March has been a good month for lovers of, and developers for, the Android operating system in pretty much every regard. That good news comes at the expense of the Apple iPhone and iOS we are led to believe, which appears to be losing the fight …

[ATTACH=right]15792[/ATTACH]Google has been attempting to break out of their search engine based box for quite some time by presenting challenges to some of the IT world's biggest names such as Microsoft and Apple. Now with the new App Inventor that Google has launched for Android it is giving developers more …

iPad users in the USA have found themselves caught up in a security gaff which saw subscriber data of some 114,000 of them exposed for anyone to see. Subscriber data such as email addresses the Integrated Circuit Card ID that authenticates them on the AT&T network. The security researchers which …

Mobile developers will be pleased to learn that Recursion Software has announced the availability of a C++ Toolkits Symbian bundle. The cross-platform, mobile and embedded app development tools specialist took the opportunity at the CTIA Wireless IT and Entertainment Expo 2009 to announce that C++ libraries for the iPhone and …

## Introduction ## In a previous tutorial, we learned [how to create a notification on Android](https://www.daniweb.com/programming/mobile-development/tutorials/536756/android-native-how-to-create-a-notification#post2282507). In that tutorial, we did not have to request any permission because applications did not need permission to post notifications on Android 12 and below. It has been almost a year since the release …

Hi DW, I've faced an issue with my project, it has been working these years till I think last year or the other year. When I sync it fails saying unable to resolve dependency no matter which version I try I get similar error differs with version number.

So here, I am gonna to ask developers around which is the most popular language is used to develop a game for students or professionals.

I have a requirement that says something like this, I need to make an ios app that reads the hardware data that's being sent, it's ble hid based, and now I need an objective-c demo. Somebody tell me. Thank you

## Introduction ## In a previous tutorial, we learned [how to set an exact alarm](https://www.daniweb.com/programming/mobile-development/tutorials/537920/android-native-how-to-launch-activity-from-an-exact-alarm). A permission called `SCHEDULE_EXACT_ALARM` was used in that tutorial. Initially, I thought that it was only a normal install-time permission, but I have recently found out that this specific permission also belongs to a rare …

## Introduction ## When working with ViewModels, instead of using the default, it is best practice that we inject coroutine dispatchers instead of hard-coding them. The reasoning behind this is that it is easier to switch to a testable dispatcher in tests. In this tutorial, we will learn how to …

## Introduction ## When working with RecyclerView, sometimes we are required to scroll the RecyclerView in code, especially after addition of a list item. In this tutorial, we will learn how to scroll to specific positions on a RecyclerView. ## Goals ## At the end of the tutorial, you would …

## Introduction ## Taking what we already learned from the previous tutorials about drawing custom shapes and animating along elements along a Path. In this tutorial, we will combine what we learned about animation so far to create an alternating Yin Yang symbol. To those unfamiliar with the Yin Yang …

This is the second part of a series. The first part can be found [here](https://www.daniweb.com/programming/mobile-development/tutorials/538948/android-native-animate-alternating-yin-yang-symbol-part-1). ## Draw The Yin ## Now that we have the Yang drawn, we will continue onto the Yin. 1. Add the Paint for the Yin into the YingYang class. We will use a *stroke* style …

## Animation Strategy ## Welcome to part three of the tutorial; part two can be found [here](https://www.daniweb.com/programming/mobile-development/tutorials/538947/android-native-animate-alternating-yin-yang-symbol-part-2). For this animation, I have chosen to redraw the YinYang Drawable at each frame. This means recreating the YinYang object with different constructor parameters on every frame (the current YinYang implementation has a …

## Introduction ## Welcome to part two of the tutorial. Let us continue to learn how to animate views along a Path. Part one can be found [here](https://www.daniweb.com/programming/mobile-development/tutorials/538944/android-native-animate-view-along-path-part-1). ## Important Coordinates ## Both the sun and the moon in our app can occupy any one of the three important coordinates …

## Introduction ## In the last tutorial, we learned [how to draw complex shapes](https://www.daniweb.com/programming/mobile-development/tutorials/538943/android-native-draw-complex-shapes-using-the-path-class#post2288657) using a Path object. Using the concepts from the previous tutorial, we will now attempt to animate Views to move along a custom Path. ## Goals ## At the end of the tutorial, you would have …

## Introduction ## In the last tutorial, we learned [how to draw basic shapes](https://www.daniweb.com/programming/mobile-development/tutorials/538942/android-native-draw-basic-shapes-on-canvas) on Android using premade methods from the graphics library. In this tutorial, we step up the difficulty a notch by learning how to draw using the Path class. The Path class allows for drawing of technically …

## Introduction ## Even though the built-in vector library included in Android Studio contains many icons readily for use, you might eventually run into a situation where a custom icon is needed. In this tutorial, we will learn how to create our own icons from basic shapes drawn on a …

## Introduction ## Android includes many options to add animations to your app. In this tutorial, we will learn how to add a type of animation called frame-by-frame animation into our Android app. ## Goals ## At the end of the tutorial, you would have learned: 1. How to add …

## Introduction ## In this tutorial, we will learn how to create an instrumented test for Navigation Components. ## Goals ## At the end of the tutorial, you would have learned: 1. How to test Navigation Components. ## Tools Required ## 1. Android Studio. The version used in this tutorial …

## Introduction ## In this tutorial, we will learn how to load data asynchronously into a **ListAdapter** (*a subclass of **RecyclerView.Adapter***). ## Goals ## At the end of the tutorial, you would have learned: 1. How to serve asynchronous data to a **ListAdapter**. ## Tools Required ## 1. Android Studio. …

## Introduction ## In this tutorial, we will learn how to filter and validate Intents fired from the application under test. ## Goals ## At the end of the tutorial, you would have learned: 1. How to filter and validate Intents in Espresso tests. ## Tools Required ## 1. Android …

## Introduction ## When working with Espresso tests, you might have found it hard to make Espresso wait for background tasks to complete before performing other actions or assertions. Fortunately, the classes in the Espresso **idling** package exist to cover this use case. In this tutorial, we will learn how …

## Introduction ## Starting from Android 10 (*API 29*), Android places many restrictions on how apps can launch activities from the background. There are a couple of exemptions, which can be found on this [list](https://developer.android.com/guide/components/activities/background-starts#exceptions). At the end of the list is the usage of the *dangerous* permission `SYSTEM_ALERT_WINDOW`. I …

## Introduction ## The Android platform provides many different types of menus to be added to an Android app. In this tutorial, we will learn how to add the most common type of menu, an **Options Menu**. An **Options Menu** is one that appears at the right corner of the …

## Introduction ## The Android platform provides many different types of menus to be added to an Android app. In this tutorial, we will learn how to add **Contextual Menu**s to our app. ## Goals ## At the end of the tutorial, you would have learned: 1. How to add …

## Introduction ## Among all of the Android libraries, Paging 3 is perhaps one of the hardest to understand. Personally, I think the problem with Paging 3 are: 1. Developers need to learn a lot of custom classes before they can understand how Paging 3 works under the hood and …

## Introduction ## The Android Paging 3 library can operate in two modes, with an offline Room database as a source of truth or without one. In this tutorial, we will look at how to use Paging 3 with a local Room database. This tutorial expands on the previously published …

## 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. …

## 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 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 ## 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 …

## 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 ## 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 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 …

 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 …

## Introduction ## The **Storage Access Framework** (SAF) provides a great way to access files exposed by other applications via their own DocumentProviders. In this tutorial, we will learn how to use the SAF in our App. ## Goals ## At the end of the tutorial, you would have learned: …

I have updated my Android Studio to the Artic Fox Version. After that neither the projects with old Gradle versions running nor the new projects with latest Gradle versions running. Only the following errors appears: Could not install Gradle distribution from 'https: //services.gradle.org/distributions/gradle-7.0.2-bin.zip' After this error I manually downloaded the …

## Introduction ## In Android development, the MediaStore API is a great API to use if you are building a music player. In this tutorial, we will learn how to query for audio files in the MediaStore database. ## Goals ## At the end of the tutorial, you would have …

## Introduction ## WorkManager is the preferred method of managing background tasks on Android. It also includes convenient extensions for RxJava3 and Kotlin Coroutines. In this tutorial, we will learn how to use WorkManager as well as how to observe the background task with the debugging tool Background Task Inspector. …

## Introduction ## UI Automator is a library that allows you to create tests that can interact with other components besides your App, such as Settings or other Android components. In this tutorial, we will learn how to incorporate UI Automator into our tests. ## Goals ## At the end …

Hello I am currently learning Android app development, and using Android Studio 4.1.3. I have noticed that when I run any project, even like a simple "Hello World", the Gradle build takes more than 10 minutes to complete. I have a laptop which is a Core i5 7th Gen, with …

Hi everyone. I wana ask to the experianced person that is it possible to make the exact replica of a website's android app ? I mean of I have a site related to novel or books can I make its exact android app? Which later can be published to Play …

Hi every1, can anyone lead me to the end of the tunnel in which Cordova had pushed me in? I just want to see the light, at the end of the tunnel. I've read ,re-read, and re-read again the doc, and I've explored dozens of pages according to what Google …