Import .item_repo.view.*Ĭlass RepoListAdapter(private val repoList: RepoResult) : RecyclerView.Package import import import import retrofit2.Call import retrofit2.Callback import retrofit2.Response import retrofit2.Retrofit import. To accomplish this, replace the contents of the file below package with the following: // Other import statements here You’ll modify the Adapter for your RecyclerView to accept this more complex object instead from network. You’ll notice that the Adapter accepts a list of hard-coded strings in the parameter. The next step is to open the RepoListAdapter.kt file. Xml and Json parsers and serializers A REST client for working with FHIR-compliant servers Helper classes to work with the specification metadata, most. You can convert your JSON response to model representation from external Android Studio plugins and web plugin like : jsonschema2pojo. RepoResult is a list of Item objects from your JSON response. In Kotlin, data class offers a convenient way to express a value object. Enter the following code: data class RepoResult(val items: List)ĭata class Owner(val login: String?, val id: Long?, val avatarUrl: String?) In the dialog, name it Response and choose File for the type. From the context menu, select New ▸ Kotlin File/Class. Right-click on the data package in the project materials. Get started by defining a data model that makes sense of the JSON response. The next step is to update the UI to see the results on the screen. You have successfully made a network request when the user’s device has connectivity. This time, the control will go into else, and an alert will appear on the emulator:īe sure to turn off Airplane Mode for the rest of this tutorial. Now, disable internet access by toggling Airplane Mode on:ĭebug your app again. If your emulator has a network connection, doAsync will execute, and you’ll see the resulting JSON response in the Logcat tab. You can step over the code by pressing the Step Over button in the debug pane. It’s highlighted in the image below:Īndroid Studio will build and run then pause execution at if. You can further explore the logic by setting a breakpoint on if. If not, it displays an alert to the user. If there is, the app makes the network request. This code first checks whether there is a network connection. setIcon(android.R.drawable.ic_dialog_alert).show() Add the following code below url and inside onCreate(): doAsync Start with a narrow search at first so you aren’t overwhelmed with too much data. It queries the GitHub API for repositories written in Kotlin that contain the phrase “super mario”. MainActivity.kt defines a value url that contains the first network request. Now that you have your permissions set up, you can move on to making your first network request! Initiating a Request on a Background Thread Open manifests/AndroidManifest.xml and add the following permissions above the application tag: ĪCCESS_NETWORK_STATE checks the network state of the device. Your app must include certain permissions to perform network operations in Android. Check the Optimize imports on the fly (for current project) checkbox, too. Then go to Editor ▸ General ▸ Auto Import and check the Add unambiguous imports on the fly checkbox. Go to either Android Studio ▸ Preferences on macOS or File ▸ Settings on PC. This step saves you from having to add individual import statements. RecyclerView contains a hard-coded list of repository names.īuild and run to preview what you have to work with:īefore adding any Kotlin code, configure Android Studio to insert import statements automatically. It uses a simple RecyclerView named repoList. Open MainActivity.kt from the ui.activities package and explore the code. Then browse to the starter directory in the downloaded materials and click Open. You can also use File ▸ Open in Android Studio. Just use this Json helper class JSON HELPER To convert JSONObject use JsonHelper.toMap (JSONObject object) given there. And you don't know what structure the JSONObject would have. Open the starter project in Android Studio 3.1.2 or greater by selecting Open an existing Android Studio project from the Welcome to Android Studio window: You want to parse the JSONObject at runtime and get its keys. Once your download completes, unzip the file. Getting Startedĭownload the starter project by clicking the Download Materials button at the top or bottom of the tutorial. If you’re new to Android development, read through our Beginning Android Development tutorials to familiarize yourself with the basics. Note: This tutorial assumes you’re familiar with the basics of Android development.
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