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Build a India COVID-19 Cases Tracker Android App By City and State in Java & XML Using Volley and COVID19India API in Android Studio Full Project For Beginners

 

 

colors.xml

 

 

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#024265</color>
    <color name="colorPrimaryDark">#024265</color>
    <color name="colorAccent">#05af9b</color>

    <color name="color_one">#fb7268</color>
    <color name="color_white">#ededf2</color>
    <color name="color_two">#E3E0E0</color>

    <color name="cases">#FFA726</color>
    <color name="recovered">#66BB6A</color>
    <color name="deaths">#EF5350</color>
    <color name="active">#29B6F6</color>
</resources>

 

 

build.gradle

 

 

// Volley library
implementation 'com.android.volley:volley:1.1.1'

 

 

And also we need to add the internet permission to get data from the api

 

<!--Allow Internet Permission-->
<uses-permission android:name="android.permission.INTERNET" />

 

 

XML Code

 

 

activity_main.xml

 

 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="17dp"
        android:text="GEEKSFORGEEKS"
        android:textColor="@color/recovered"
        android:textSize="24sp" />

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="550dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true"
        android:layout_marginStart="10dp"
        android:layout_marginTop="60dp"
        android:layout_marginEnd="10dp"
        android:layout_marginBottom="10dp" />
    
</RelativeLayout>

 

 

testing.xml

 

 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:background="@color/color_white"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:orientation="horizontal"
            android:weightSum="2">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_gravity="center_vertical"
                android:layout_weight="1"
                android:orientation="vertical">

                <!--Text view to display City name-->
                <TextView
                    android:id="@+id/state"
                    android:layout_width="210dp"
                    android:layout_height="match_parent"
                    android:gravity="center_vertical"
                    android:text="City Name"
                    android:textColor="@color/colorAccent"
                    android:textSize="14sp"
                    android:textStyle="bold" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:orientation="vertical">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="horizontal">

                    <!--Text view to display Active Cases-->
                    <TextView
                        android:layout_width="107dp"
                        android:layout_height="match_parent"
                        android:gravity="center_horizontal"
                        android:text="Active- "
                        android:textStyle="bold" />

                    <!--Text view to display Active Cases in Numbers-->
                    <TextView
                        android:id="@+id/active"
                        android:layout_width="72dp"
                        android:layout_height="wrap_content"
                        android:text="2323223 "
                        android:textColor="@color/active"
                        android:textStyle="bold" />

                    <!--Image view to display increase in Cases -->
                    <ImageView
                        android:layout_width="17dp"
                        android:layout_height="match_parent"
                        android:src="@drawable/change" />

                    <!--Text view to display Todays Active Cases in Numbers-->
                    <TextView
                        android:id="@+id/incactive"
                        android:layout_width="wrap_content"
                        android:layout_height="match_parent"
                        android:gravity="center_horizontal"
                        android:text="32"
                        android:textColor="@color/active"
                        android:textStyle="bold" />
                </LinearLayout>

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="horizontal">

                    <!--Text view to display Cured Cases -->
                    <TextView
                        android:layout_width="107dp"
                        android:layout_height="match_parent"
                        android:gravity="center_horizontal"
                        android:text="Cured- "
                        android:textStyle="bold" />

                    <!--Text view to display Total Cured Cases in Numbers -->
                    <TextView
                        android:id="@+id/cured"
                        android:layout_width="72dp"
                        android:layout_height="wrap_content"
                        android:text="2323223 "
                        android:textColor="@color/recovered"
                        android:textStyle="bold" />

                    <!--Image view to display increase in Cases -->
                    <ImageView
                        android:layout_width="18dp"
                        android:layout_height="match_parent"
                        android:src="@drawable/change" />

                    <!--Text view to display Todays Cured Cases in Numbers -->
                    <TextView
                        android:id="@+id/inccured"
                        android:layout_width="wrap_content"
                        android:layout_height="match_parent"
                        android:gravity="center_horizontal"
                        android:text="32"
                        android:textColor="@color/recovered"
                        android:textStyle="bold" />

                </LinearLayout>

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="horizontal">

                    <!--Text view to display deths Cases -->
                    <TextView
                        android:layout_width="107dp"
                        android:layout_height="match_parent"
                        android:gravity="center_horizontal"
                        android:text="death- "
                        android:textStyle="bold" />

                    <!--Text view to display total death Cases in Numbers -->
                    <TextView
                        android:id="@+id/death"
                        android:layout_width="72dp"
                        android:layout_height="wrap_content"
                        android:text="2323223 "
                        android:textColor="@color/deaths"
                        android:textStyle="bold" />

                    <!--Image view to display increase in Cases -->
                    <ImageView
                        android:layout_width="18dp"
                        android:layout_height="match_parent"
                        android:src="@drawable/change" />

                    <!--Text view to display todays death Cases in Numbers -->
                    <TextView
                        android:id="@+id/incdeath"
                        android:layout_width="wrap_content"
                        android:layout_height="match_parent"
                        android:gravity="center"
                        android:text="32"
                        android:textColor="@color/deaths"
                        android:textStyle="bold" />

                </LinearLayout>

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="horizontal">

                    <!--Text view to display total Number of cases Cases -->
                    <TextView
                        android:layout_width="107dp"
                        android:layout_height="match_parent"
                        android:gravity="center_horizontal"
                        android:text="total- "
                        android:textStyle="bold" />

                    <!--Text view to display total Number of cases Cases in Numbers -->
                    <TextView
                        android:id="@+id/total"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:text="2323223 "
                        android:textStyle="bold" />

                </LinearLayout>

            </LinearLayout>

        </LinearLayout>

    </LinearLayout>

    <View
        android:layout_width="391dp"
        android:layout_height="6dp"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:layout_marginStart="11dp"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="113dp"
        android:layout_marginEnd="10dp"
        android:layout_marginRight="20dp"
        android:background="@color/color_two" />

</RelativeLayout>

 

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Java Code

 

 

Model.java

 

 

public class Model {
    private String name, total, death, cured, active, incAct, incDec, incRec;

    public Model(String name, String total, String death, String cured,
                String active, String incAct, String incDec, String incRec)
    {
        this.name = name;
        this.total = total;
        this.death = death;
        this.cured = cured;
        this.active = active;
        this.incAct = incAct;
        this.incDec = incDec;
        this.incRec = incRec;
    }

    public String getIncAct()
    {
        return incAct;
    }

    public void setIncAct(String incAct)
    {
        this.incAct = incAct;
    }

    public String getIncDec()
    {
        return incDec;
    }

    public void setIncDec(String incDec)
    {
        this.incDec = incDec;
    }

    public String getIncRec()
    {
        return incRec;
    }

    public void setIncRec(String incRec)
    {
        this.incRec = incRec;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public String getTotal()
    {
        return total;
    }

    public void setTotal(String total)
    {
        this.total = total;
    }

    public String getDeath()
    {
        return death;
    }

    public void setDeath(String death)
    {
        this.death = death;
    }

    public String getCured()
    {
        return cured;
    }

    public void setCured(String cured)
    {
        this.cured = cured;
    }

    public String getActive()
    {
        return active;
    }

    public void setActive(String active)
    {
        this.active = active;
    }
}

 

 

Step 7: Create an Adapter Class

Now create a new JAVA Adapter Class to put the data that have fetched into a ListView that has created before.

 

 

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import java.util.List;

// Create A Class Adapter
public class Adapter extends ArrayAdapter<Model> {
    private Context context;
    private List<Model> modelList;
    
    public Adapter(Context context, List<Model> modelList) {
        super(context, R.layout.testing, modelList);
        
        this.context = context;
        this.modelList = modelList;
    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {

        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.testing, null,true);

        // In this step we connect the XML with Java File
        TextView state = view.findViewById(R.id.state);
        TextView active = view.findViewById(R.id.active);
        TextView cured = view.findViewById(R.id.cured);
        TextView death = view.findViewById(R.id.death);
        TextView total = view.findViewById(R.id.total);
        TextView incactive = view.findViewById(R.id.incactive);
        TextView inccured = view.findViewById(R.id.inccured);
        TextView incdeath = view.findViewById(R.id.incdeath);

        // Adding Data to modellist
        state.setText(modelList.get(position).getName());
        active.setText(modelList.get(position).getActive());
        cured.setText(modelList.get(position).getCured());
        death.setText(modelList.get(position).getDeath());
        total.setText(modelList.get(position).getTotal());
        incactive.setText(modelList.get(position).getIncAct());
        inccured.setText(modelList.get(position).getIncRec());
        incdeath.setText(modelList.get(position).getIncDec());

        return view;
    }
}

 

 

MainActivity.java

 

 

import android.os.Bundle;
import android.widget.ListView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    ListView listView;

    public static List<Model> modelList = new ArrayList<>();
    Model model;
    Adapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = findViewById(R.id.listView);
        fetchData();

    }

    private void fetchData() {
        // The Link Through Which We Can Fetch Data
        String url = "https://api.covid19india.org/state_district_wise.json";

        StringRequest request = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {

                try {
                    // Creating JSON Object
                    JSONObject object = new JSONObject(response);

                    // From that object we are fetching data
                    JSONObject object1 = object.getJSONObject("Uttar Pradesh");
                    JSONObject object2 = object1.getJSONObject("districtData");
                    JSONObject object3 = object2.getJSONObject("Prayagraj");
                    JSONObject object4 = object3.getJSONObject("delta");


                    String active = object3.getString("active");
                    String confirmed = object3.getString("confirmed");
                    String deceased = object3.getString("deceased");
                    String recovered = object3.getString("recovered");

                    String confInc = object4.getString("confirmed");
                    String confDec = object4.getString("deceased");
                    String confRec = object4.getString("recovered");

                    model = new Model("Prayagraj", confirmed, deceased, recovered, active,
                                                                    confInc, confDec, confRec);
                    // placing data into the app using AdapterClass
                    modelList.add(model);

                    // Creating JSON Object
                    object3 = object2.getJSONObject("Ballia");

                    // From that object we are fetching data
                    active = object3.getString("active");
                    confirmed = object3.getString("confirmed");
                    deceased = object3.getString("deceased");
                    recovered = object3.getString("recovered");
                    object4 = object3.getJSONObject("delta");
                    confInc = object4.getString("confirmed");
                    confDec = object4.getString("deceased");
                    confRec = object4.getString("recovered");

                    model = new Model("Ballia", confirmed, deceased, recovered, active,
                                                                confInc, confDec, confRec);
                    // placing data into the app using AdapterClass
                    modelList.add(model);

                    // Creating JSON Object
                    object3 = object2.getJSONObject("Lucknow");

                    // From that object we are fetching data
                    active = object3.getString("active");
                    confirmed = object3.getString("confirmed");
                    deceased = object3.getString("deceased");
                    recovered = object3.getString("recovered");
                    object4 = object3.getJSONObject("delta");

                    confInc = object4.getString("confirmed");
                    confDec = object4.getString("deceased");
                    confRec = object4.getString("recovered");

                    model = new Model("Lucknow", confirmed, deceased, recovered, active,
                                                                    confInc, confDec, confRec);
                    // placing data into the app using AdapterClass
                    modelList.add(model);

                    // Creating JSON Object
                    object3 = object2.getJSONObject("Varanasi");

                    // From that object we are fetching data
                    active = object3.getString("active");
                    confirmed = object3.getString("confirmed");
                    deceased = object3.getString("deceased");
                    recovered = object3.getString("recovered");
                    object4 = object3.getJSONObject("delta");

                    confInc = object4.getString("confirmed");
                    confDec = object4.getString("deceased");
                    confRec = object4.getString("recovered");

                    model = new Model("Varanasi", confirmed, deceased, recovered, active,
                                                                    confInc, confDec, confRec);
                    // placing data into the app using AdapterClass
                    modelList.add(model);

                    // Creating JSON Object
                    object3 = object2.getJSONObject("Agra");

                    // From that object we are fetching data
                    active = object3.getString("active");
                    confirmed = object3.getString("confirmed");
                    deceased = object3.getString("deceased");
                    recovered = object3.getString("recovered");
                    object4 = object3.getJSONObject("delta");
                    confInc = object4.getString("confirmed");
                    confDec = object4.getString("deceased");
                    confRec = object4.getString("recovered");

                    model = new Model("Agra", confirmed, deceased, recovered, active,
                                                                confInc, confDec, confRec);
                    // placing data into the app using AdapterClass
                    modelList.add(model);

                    adapter = new Adapter(MainActivity.this, modelList);
                    listView.setAdapter(adapter);

                    // In case of error it will run
                } catch (JSONException e) {
                    e.printStackTrace();
                }

            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                // In case of error it will run
                Toast.makeText(MainActivity.this, error.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });

        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(request);
    }
}

 

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