[Huawei Developers] HMS Community:
View attachment 5657709

Introduction

In this article, we can learn how to get the number of Covid-19 affected cases world-wide as well as India wise. Here, we have used the Volley as Library to fetch the data using the REST API to display in the application. In this application, we can find the total cases affected, number of cases recovered and number of deaths on world wide as well as in India can find the state wise list also.

So, I will provide a series of articles on this Patient Tracking App, in upcoming articles I will integrate other Huawei Kits.

If you are new to this application, follow my previous articles.

https://forums.developer.huawei.com/forumPortal/en/topic/0201902220661040078

https://forums.developer.huawei.com/forumPortal/en/topic/0201908355251870119

Requirements

1. Any operating system (MacOS, Linux and Windows).

2. Must have a Huawei phone with HMS 4.0.0.300 or later.

3. Must have a laptop or desktop with Android Studio, Jdk 1.8, SDK platform 26 and Gradle 4.6 and above installed.

4. Minimum API Level 24 is required.

5. Required EMUI 9.0.0 and later version devices.

How to integrate HMS Dependencies

1. First register as Huawei developer and complete identity verification in Huawei developers website, refer to register a Huawei ID.

2. Create a project in android studio, refer Creating an Android Studio Project.

3. Generate a SHA-256 certificate fingerprint.

4. To generate SHA-256 certificate fingerprint. On right-upper corner of android project click Gradle, choose Project Name > Tasks > android, and then click signingReport, as follows.

Note: Project Name depends on the user created name.

5. Create an App in AppGallery Connect.

6. Download the agconnect-services.json file from App information, copy and paste in android Project under app directory, as follows.

7. Enter SHA-256 certificate fingerprint and click Save button, as follows.

Note: Above steps from Step 1 to 7 is common for all Huawei Kits.

8. Add the below maven URL in build.gradle(Project) file under the repositories of buildscript, dependencies and allprojects, refer Add Configuration.

maven { url 'http://developer.huawei.com/repo/' }
classpath 'com.huawei.agconnect:agcp:1.6.0.300'

9. Add the below plugin and dependencies in build.gradle(Module) file.

apply plugin: id 'com.huawei.agconnect'
// Huawei AGC
implementation 'com.huawei.agconnect:agconnect-core:1.6.0.300'
// Recyclerview
implementation 'androidx.recyclerview:recyclerview:1.2.1'
// Volley Library
implementation 'com.android.volley:volley:1.2.1'

10. Now Sync the gradle.

11. Add the required permission to the AndroidManifest.xml file.

<uses-permission android:name="android.permission.INTERNET" />

Let us move to development

I have created a project on Android studio with empty activity let us start coding.

In the Home.kt activity to find the business logic for button item click.

class Home : AppCompatActivity(), HomeAdapter.ItemListener {

private lateinit var recyclerView: RecyclerView
private lateinit var arrayList: ArrayList<HomeIcons>

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_home)

recyclerView = findViewById(R.id.recyclerview_list)
arrayList = ArrayList()
arrayList.add(HomeIcons("Patient", "Add details", R.drawable.add_icon, "#00b0ff"))
arrayList.add(HomeIcons("Covid-19", "Covid Cases", R.drawable.covid_icon, "#00b0ff"))

val adapter = HomeAdapter(applicationContext, arrayList, this)
recyclerView.adapter = adapter
recyclerView.layoutManager = GridLayoutManager(this, 2)
recyclerView.setHasFixedSize(true)

}

override fun onItemClick(item: Int) {
when(item ) {
0 -> {val intent = Intent(this, PatientActivity::class.java)
startActivity(intent)
}
1 -> {val intent = Intent(this@Home, CovidActivity::class.java)
startActivity(intent)
}

}
}

}

In the CovidActivity.kt activity to find the business logic for cases list data.

class CovidActivity : AppCompatActivity() {

lateinit var worldCases: TextView
lateinit var worldRecovered: TextView
lateinit var worldDeaths: TextView
lateinit var countryCases: TextView
lateinit var countryRecovered: TextView
lateinit var countryDeaths: TextView
lateinit var stateRV: RecyclerView
lateinit var stateRVAdapter: CasesAdapter
lateinit var stateList: List<CasesData>

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_covid)

worldCases = findViewById(R.id.txt_world_cases)
worldRecovered = findViewById(R.id.txt_world_recovered)
worldDeaths = findViewById(R.id.txt_world_deaths)
countryCases = findViewById(R.id.txt_india_cases)
countryRecovered = findViewById(R.id.txt_india_recovered)
countryDeaths = findViewById(R.id.txt_india_deaths)
stateRV = findViewById(R.id.recyclerview_cases)
stateList = ArrayList<CasesData>()
getStateInfo()
getWorldInfo()

}

private fun getStateInfo(){
val url = "https://api.rootnet.in/covid19-in/stats/latest"
val queue = Volley.newRequestQueue(this@CovidActivity)
val request = JsonObjectRequest(Request.Method.GET,url, null, { response ->
try{
val dataObj = response.getJSONObject("data")
val summaryObj = dataObj.getJSONObject("summary")
val cases: Int = summaryObj.getInt("total")
val recovered:Int = summaryObj.getInt("discharged")
val deaths: Int = summaryObj.getInt("deaths")

countryCases.text = cases.toString()
countryRecovered.text = recovered.toString()
countryDeaths.text = deaths.toString()

val regionalArray = dataObj.getJSONArray("regional")
for(i in 0 until regionalArray.length()){
val regionalObj = regionalArray.getJSONObject(i)
val stateName: String = regionalObj.getString("loc")
val cases: Int = regionalObj.getInt("totalConfirmed")
val deaths: Int = regionalObj.getInt("deaths")
val recovered: Int = regionalObj.getInt("discharged")

val stateCases = CasesData(stateName,recovered,deaths,cases)
stateList = stateList+stateCases
}
stateRVAdapter = CasesAdapter(stateList)
stateRV.layoutManager = LinearLayoutManager(this)
stateRV.adapter = stateRVAdapter
}
catch (e:JSONException){
e.printStackTrace()
}

}, {error -> Toast.makeText(this, "Failed to get Data", Toast.LENGTH_SHORT).show()
}
)
queue.add(request)

}

private fun getWorldInfo(){
val url = "https://corona.lmao.ninja/v3/covid-19/all"
val queue = Volley.newRequestQueue(this@CovidActivity)
val request = JsonObjectRequest(Request.Method.GET,url, null, { response ->
try{
val worldCases1: Int = response.getInt("cases")
val worldRecovered1:Int = response.getInt("recovered")
val worldDeaths1: Int = response.getInt("deaths")

worldRecovered.text = worldRecovered1.toString()
worldCases.text = worldCases1.toString()
worldDeaths.text = worldDeaths1.toString()

}
catch (e:JSONException){
e.printStackTrace()
}

}, {error ->
Toast.makeText(this, "Failed to get Data", Toast.LENGTH_SHORT).show()
}
)
queue.add(request)

}

}

Create a CasesData.kt data class to list the data variables.

data class CasesData(
val state: String,
val recovered: Int,
val deaths: Int,
val cases: Int
)

Create a CasesAdapter.kt adapter class to hold the list.

class CasesAdapter (private val stateList: List<CasesData>): RecyclerView.Adapter<CasesAdapter.ViewHolder>(){

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CasesAdapter.ViewHolder {
val view: View = LayoutInflater.from(parent.context).inflate(R.layout.cases_list, parent, false)
return ViewHolder(view)
}

override fun onBindViewHolder(holder: ViewHolder, position: Int) {
val stateData = stateList[position]
holder.stateCases.text = stateData.cases.toString()
holder.stateName.text = stateData.state.toString()
holder.stateDeaths.text = stateData.deaths.toString()
holder.stateRecovered.text = stateData.recovered.toString()
}

override fun getItemCount(): Int {
return stateList.size

}

inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
val stateName = itemView.findViewById<View>(R.id.txt_state) as TextView
val stateCases = itemView.findViewById<View>(R.id.txt_state_cases) as TextView
val stateDeaths = itemView.findViewById<View>(R.id.txt_state_deaths) as TextView
val stateRecovered = itemView.findViewById<View>(R.id.txt_state_recovered) as TextView
}

}

In the activity_home.xml we can create the UI screen for Recycler View item buttons.

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="8dp"
android:paddingRight="8dp"
tools:context=".Home">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="10dp"
android:visibility="gone"
android:layout_marginTop="40dp"
android:clickable="true"
tools:ignore="MissingConstraints">
<ImageView
android:id="@+id/img_android"
android:layout_width="155dp"
android:layout_height="180dp"
android:layout_marginRight="15dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="20dp"
android:src="@drawable/add_icon"/>
<ImageView
android:id="@+id/img_hms_icon"
android:layout_width="155dp"
android:layout_height="180dp"
android:layout_marginRight="5dp"
android:layout_marginTop="20dp"
android:src="@drawable/doctor_icon"/>
</LinearLayout>

<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerview_list"
android:layout_width="match_parent"
android:layout_height="match_parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

In the activity_covid.xml we can create the UI screen for cases list.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".covid.CovidActivity">

<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="3dp"
app:cardCornerRadius="3dp"
app:cardElevation="3dp">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="80dp"
android:layout_marginTop="0dp"
android:orientation="horizontal">
<ImageView
android:layout_width="50dp"
android:layout_height="100dp"
android:layout_marginLeft="25dp"
android:layout_marginBottom="25dp"
android:src="@drawable/world_icon" >
</ImageView>
<TextView
android:layout_width="match_parent"
android:layout_height="80dp"
android:text="World Wide Record"
android:textAlignment="center"
android:layout_marginBottom="30dp"
android:textSize="18sp"
android:padding="3dp"
android:textColor="@color/black"
android:layout_marginTop="25dp">
</TextView>
</LinearLayout>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="70dp"
android:orientation="horizontal"
android:weightSum="3" >

<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
tools:ignore="Suspicious0dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Cases"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="15sp"
android:padding="4dp"
android:textStyle="bold"
android:textColor="@color/black">
</TextView>
<TextView
android:id="@+id/txt_world_cases"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Number of Cases"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="12sp"
android:padding="4dp"
android:textColor="@color/blue">
</TextView>
</LinearLayout>

<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
tools:ignore="Suspicious0dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Recovered"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="15sp"
android:padding="4dp"
android:textStyle="bold"
android:textColor="@color/black">
</TextView>
<TextView
android:id="@+id/txt_world_recovered"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Number of Recovered"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="12sp"
android:padding="4dp"
android:textColor="@color/green">
</TextView>
</LinearLayout>

<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
tools:ignore="Suspicious0dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Deaths"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="15sp"
android:padding="4dp"
android:textStyle="bold"
android:textColor="@color/black">
</TextView>
<TextView
android:id="@+id/txt_world_deaths"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Number of Deaths"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="12sp"
android:padding="4dp"
android:textColor="@color/red">
</TextView>
</LinearLayout>

</LinearLayout>

</LinearLayout>

</androidx.cardview.widget.CardView>

<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="3dp"
app:cardCornerRadius="3dp"
app:cardElevation="3dp">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="80dp"
android:layout_marginTop="0dp"
android:orientation="horizontal">
<ImageView
android:layout_width="50dp"
android:layout_height="100dp"
android:layout_marginLeft="25dp"
android:layout_marginBottom="25dp"
android:src="@drawable/india_icon" >
</ImageView>
<TextView
android:layout_width="match_parent"
android:layout_height="80dp"
android:text="India Record"
android:textAlignment="center"
android:layout_marginBottom="30dp"
android:textSize="18sp"
android:padding="3dp"
android:textColor="@color/indianblue"
android:layout_marginTop="25dp">
</TextView>
</LinearLayout>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="70dp"
android:orientation="horizontal"
android:weightSum="3" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
tools:ignore="Suspicious0dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Cases"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="15sp"
android:padding="4dp"
android:textStyle="bold"
android:textColor="@color/black">
</TextView>
<TextView
android:id="@+id/txt_india_cases"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:padding="4dp"
android:text="Number of Cases"
android:textAlignment="center"
android:textColor="@color/blue"
android:textSize="12sp">
</TextView>
</LinearLayout>

<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
tools:ignore="Suspicious0dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Recovered"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="15sp"
android:padding="4dp"
android:textStyle="bold"
android:textColor="@color/black">
</TextView>
<TextView
android:id="@+id/txt_india_recovered"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Number of Recovered"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="12sp"
android:padding="4dp"
android:textColor="@color/green">
</TextView>
</LinearLayout>

<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
tools:ignore="Suspicious0dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Deaths"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="15sp"
android:padding="4dp"
android:textStyle="bold"
android:textColor="@color/black">
</TextView>
<TextView
android:id="@+id/txt_india_deaths"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Number of Deaths"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="12sp"
android:padding="4dp"
android:textColor="@color/red">
</TextView>
</LinearLayout>

</LinearLayout>

</LinearLayout>

</androidx.cardview.widget.CardView>

<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerview_cases"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

</LinearLayout>

In the cases_list.xml we can create the UI screen for customized items of state wise cases.

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="3dp"
app:cardCornerRadius="3dp"
app:cardElevation="3dp" >

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">

<TextView
android:id="@+id/txt_state"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="State Name"
android:textSize="18sp"
android:padding="5dp"
android:layout_margin="3dp"
android:textColor="@color/teal_700">
</TextView>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="65dp"
android:orientation="horizontal"
android:weightSum="3" >

<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Cases"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="15sp"
android:padding="4dp"
android:textStyle="bold"
android:textColor="@color/black">
</TextView>
<TextView
android:id="@+id/txt_state_cases"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Number of Cases"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="12sp"
android:padding="4dp"
android:textColor="@color/blue">
</TextView>
</LinearLayout>

<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Recovered"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="15sp"
android:padding="4dp"
android:textStyle="bold"
android:textColor="@color/black">
</TextView>
<TextView
android:id="@+id/txt_state_recovered"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Number of Recovered"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="12sp"
android:padding="4dp"
android:textColor="@color/green">
</TextView>
</LinearLayout>

<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Deaths"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="15sp"
android:padding="4dp"
android:textStyle="bold"
android:textColor="@color/black">
</TextView>
<TextView
android:id="@+id/txt_state_deaths"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Number of Deaths"
android:textAlignment="center"
android:layout_gravity="center_horizontal"
android:textSize="12sp"
android:padding="4dp"
android:textColor="@color/red">
</TextView>
</LinearLayout>

</LinearLayout>

</LinearLayout>

</androidx.cardview.widget.CardView>

Demo

Tips and Tricks

1. Make sure you are already registered as Huawei developer.

2. Set minSDK version to 24 or later, otherwise you will get AndriodManifest merge issue.

3. Make sure you have added the agconnect-services.json file to app folder.

4. Make sure you have added SHA-256 fingerprint without fail.

5. Make sure all the dependencies are added properly.

Conclusion

In this article, we have learned that how to get the number of Covid-19 affected cases world-wide as well as India wise. Here, we have used the Volley as Library to fetch the data using the REST API to display in the application. In this application, we can find the total cases affected, number of cases recovered and number of deaths on worldwide as well as in India can find the state wise list also.

I hope you have read this article. If you found it is helpful, please provide likes and comments.

Reference

Volley Library - https://www.geeksforgeeks.org/volle... library,interfering with the user experience.