package com.moac.android.soundmap.api;

import android.util.Log;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.google.gson.Gson;

public class ApiClient {

    private static final String TAG = ApiClient.class.getSimpleName();

    private final String hostDomain;
    private final String hostScheme;
    private final String clientId;

    private Gson gson;
    private RequestQueue requestQueue;

    public ApiClient(RequestQueue requestQueue, Gson gson, String hostScheme, String hostDomain, String clientId) {
        this.requestQueue = requestQueue;
        this.gson = gson;
        this.hostScheme = hostScheme;
        this.hostDomain = hostDomain;
        this.clientId = clientId;
    }

    public <T> void execute(ApiRequest<T> request, Response.Listener<T> okListener, Response.ErrorListener errorListener) {

        // Add required header
        if (!request.getQueryMap().containsKey(ApiConst.CLIENT_ID_PARAM)) {
            request.withQuery(ApiConst.CLIENT_ID_PARAM, clientId);
        }

        final String url = String.format("%s://%s%s", hostScheme, hostDomain, request.toUrl());
        Log.i(TAG, "### execute() ### - url: " + url);
        GsonRequest apiRequest = new GsonRequest<>(gson, url, request.getTargetType(), okListener, errorListener);
        requestQueue.add(apiRequest);
    }
}

package com.moac.android.soundmap.api;

import android.util.Log;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.google.gson.Gson;

public class ApiClient {

    private static final String TAG = ApiClient.class.getSimpleName();

    private final String hostDomain;
    private final String hostScheme;
    private final String clientId;

    private Gson gson;
    private RequestQueue requestQueue;

    public ApiClient(RequestQueue requestQueue, Gson gson, String hostScheme, String hostDomain, String clientId) {
        this.requestQueue = requestQueue;
        this.gson = gson;
        this.hostScheme = hostScheme;
        this.hostDomain = hostDomain;
        this.clientId = clientId;
    }

    public <T> void execute(ApiRequest<T> request, Response.Listener<T> okListener, Response.ErrorListener errorListener) {

        // Add required header
        if (!request.getQueryMap().containsKey(ApiConst.CLIENT_ID_PARAM)) {
            request.withQuery(ApiConst.CLIENT_ID_PARAM, clientId);
        }

        final String url = String.format("%s://%s%s", hostScheme, hostDomain, request.toUrl());
        Log.i(TAG, "### execute() ### - url: " + url);
        GsonRequest<T> apiRequest = new GsonRequest<>(gson, url, request.getTargetType(), okListener, errorListener);
        requestQueue.add(apiRequest);
    }
}

Fix unsafe operation generics warning
Fix unsafe operation generics warning
