<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.poc.justamap">

    <!--
         The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
         Google Maps Android API v2, but you must specify either coarse or fine
         location permissions for the 'MyLocation' functionality.
    -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="MY_API_KEY" />

        <activity
            android:name=".MapsActivity"
            android:label="@string/title_activity_maps">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

        <activity
            android:name=".MapsActivity"
            android:label="@string/title_activity_maps"></activity>
        <activity android:name=".WelcomeActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

package ...

import...

public class ColorListAdapter extends RecyclerView.Adapter {

   private JSONArray colorList;

   public ColorListAdapter(JSONArray json){
       super();
       if(json != null){
           this.colorList = json;
       }
   }

   @NonNull @override
   public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
       View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.fragment_color_view, viewGroup, false);
       return new ColorListHolder(view);
   }

   @override
   public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
       try {
           ((ColorListHolder)viewHolder).setContentValue(i);
       } catch (JSONException e) {
           e.printStackTrace();
       }
   }

   @override
   public int getItemCount() {
       return this.colorList.length();
   }

   private class ColorListHolder extends RecyclerView.ViewHolder {

       private TextView colorCodeText;
       private TextView colorNameText;
       private CardView imageView;

       public ColorListHolder(@NonNull View itemView) {
           super(itemView);
           this.colorCodeText = itemView.findViewById(R.id.colorCode_text);
           this.colorNameText = itemView.findViewById(R.id.colorName_text);
           this.imageView = itemView.findViewById(R.id.colorView);
       }

       public void setContentValue(int index) throws JSONException {
           this.colorNameText.setText(((JSONObject)colorList.get(index)).getString("Name"));
           this.colorCodeText.setText(((JSONObject)colorList.get(index)).getString("ColorCode"));
           this.imageView.setCardBackgroundColor(Color.parseColor(((JSONObject)colorList.get(index)).getString("HexString")));
       }
   }

}

Toast.makeText(getApplicationContext(), "Record added", Toast.LENGTH_SHORT).show();