How to create a covid

How to create a COVID-19 Tracker Android application to view detailed information about any city and state in IndiaJaipur Investment?

In this tutorial, we will use Android Studio to create a COVID-19 tracker application, which will provide users with the latest COVID-19 data in various states and cities in India.

Java programming language

Android Studio Integrated Development Environment (IDE)

Basic Android development concept

Step 1 -Create project

First, create a new project in Android Studio.Select "Empty Activity" as the project template.

Step 2 -Settings dependencies

Add the following dependencies to the project level:

These dependencies will enable us to use the Retrofit network library to request the API and turn the response to the Java object.

Step 3 -Create API

Now, we need to create an API for obtaining COVID-19 data.We will use the COVID-19 Indian API, which provides the latest COVID-19 data about states and cities in India.

Create a Java interface file and name it, we will use Retrofit annotations to define different endpoints of the API.The following is an example:

The interface defines a method that uses Retrofit annotations to specify the data source.It is a class we will write, which describes the structure of response data.

Step 4 -Create a data model

For the response data obtained from the API, we need to create a Java class, which matches the structure of the response data.We will create the following categories:

In the above code, the class contains the data list of various states of India, and the data of each state is defined in the class.

Step 5 -Create UI

Now, we need to create a user interface for applications.For this example, we will use RecyclerView to display the COVID-19 data of all India State.

Create a XML layout file in the project, which contains a RecyclerView component.For example:

Next, get the RecyclerView component in the Activity class and set the layout manager and adapter.

We will create a custom adapter named.The bottom is the COVID-19 data list passed to the adapter for the display.

Step 6 -Request APIChennai Stock

When the application starts, we should issue asynchronous API requests in the background and use response to update data in RecyclerView.

Please note that we need to provide network permissions for requesting from the network.Please open the file and add the following permissions:

Now, we need to use the Retrofit library in Activity to send HTTP GET requests and deal with response.

In the above code, we use the RETROFIT library to create a RETROFIT instance and use the instance to create the implementation of the interface.Jinnai Wealth Management

We use the asynchronous method to call the method. This method receives an object as a parameter, which represents the response data by this object.In the case of normal response, we extract the data into one and use the adapter to update RecyclerView.

Step 7 -Update Recyclerview

In the class, we use the mode to create a sub -project view.OnbindViewholder method will be called when each sub -item view is loaded.

We will set title and entry information in this method.

We need to update the data displayed by the adapter. We create the following methods:

To initially pass to the adapter list, we now add data and cause view updates in the adapter.

Step 8 -Run application

Now, we have completed the development of the application. Now we can build and run applications to observe the application show that the latest COVID-19 data in India's states.

After running the application, you should see RecyclerView with similar data:

So far, we have completed a COVID-19 tracker Android application that can view COVID-19 data from any state and city in India.In the process, we used the Retrofit network library and the RecyclerView component.

We can use the same technology to query other data sources and display data in the adapter.You can use other UI components to replace RecyclerView, such as listview or gridView to meet specific needs.

Markdown code fragment:

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