How to Post Data to API using Retrofit in Android using Jetpack Compose?
APIs are used within Android Applications to interact with databases to perform various CRUD operations on data within the database such as adding new data, reading the existing data, and updating and deleting existing data. In this article, we will take a look at How to Post Data to API using Retrofit in Android using Jetpack Compose.
Note: If you are seeking Java code for Jetpack Compose, please note that Jetpack Compose is only available in Kotlin. It uses features such as coroutines, and the handling of @Composable annotations is handled by a Kotlin compiler. There is no method for Java to access these. Therefore, you cannot use Jetpack Compose if your project does not support Kotlin.
Step By Step Implementation
Step 1: Create a New Project in Android Studio
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. While choosing the template, select Empty Compose Activity. If you do not find this template, try upgrading the Android Studio to the latest version. We demonstrated the application in Kotlin, so make sure you select Kotlin as the primary language while creating a New Project.
Step 2: Add the below dependency to your build.gradle File
Navigate to the Gradle Scripts > build.gradle(Module:app) and add the below dependency in the dependencies section.
// below dependency for using the retrofit implementation ‘com.squareup.retrofit2:retrofit:2.9.0’ implementation ‘com.squareup.retrofit2:converter-gson:2.5.0’
After adding this dependency sync your project and now move towards the AndroidManifest.xml part.
Step 3: Adding Internet Permissions in the AndroidManifest.xml File
Navigate to the app > AndroidManifest.xml and add the below code to it.
Step 4: Adding a New Color in the Color.kt File
Navigate to app > java > your app’s package name > ui.theme > Color.kt file and add the below code to it.
Step 5: Creating a Model Class for Storing Our Data
Navigate to the app > java > your app’s package name > Right-click on it > New > Kotlin class and name it as DataModel and add the below code to it. Comments are added inside the code to understand the code in more detail.
Step 6: Creating an Interface Class for Our API Call
Navigate to the app > java > your app’s package name > Right-click on it > New > Kotlin class select it as Interface and name the file as RetrofitAPI and add below code to it. Comments are added inside the code to understand the code in more detail.
Step 7: Working with the MainActivity.java file
Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.
Now run your app and see the output of the app.