okhttp returns null response - json

Question

```protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main3);
ctx=getApplicationContext();
txtString= (TextView)findViewById(R.id.txtString);
httpClient = new OkHttpClient();
try {
sendGETT();
}
catch (Exception e)
{
e.printStackTrace();
}
}
protected void sendGETT() throws IOException {
httpClient = new OkHttpClient();
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("https://devru-gaana-v1.p.rapidapi.com/featuredAlbums.php")
.get()
.addHeader("x-rapidapi-host", "devru-gaana-v1.p.rapidapi.com")
.addHeader("x-rapidapi-key", "my api key")
.build();
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
httpClient.newCall(request).enqueue(new Callback() {
#Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
#Override
public void onResponse(Call call, Response response) throws IOException {
try (ResponseBody responseBody = response.body()) {
if (!response.isSuccessful())
throw new IOException("Unexpected code " + response.body().string());
Headers responseHeaders = response.headers();
for (int i = 0, size = responseHeaders.size(); i < size; i++) {
System.out.println(responseHeaders.name(i) + ": " +
responseHeaders.value(i));
Main3Activity.txtString.setText(response.header("Server"));
}
Gson gson = new GsonBuilder().setPrettyPrinting().create();
JsonParser jp = new JsonParser();
JsonElement je = jp.parse(response.body().charStream());
final String prettyJsonString = gson.toJson(je);
runOnUiThread(new Runnable() {
#Override
public void run() {
txtString.setText(prettyJsonString);
}
});
}
}
});
}
}```
I'm trying to use okhttpclient with okhttp3, but it return a null value.i tried another url with headers which work fine but when i try this it gives null respone.I tried many solutions from net but I can't figured this out.hope for the help.thanks
This code works fine, for example,
for
Response response = client.newCall(request).execute();
Request request = new Request.Builder()
.url("https://httpbin.org/get")
.addHeader("custom-key", "mkyong") // add request headers
.addHeader("User-Agent", "OkHttp Bot")
.build();
or any other website but I want to get the content of website using rapid api with add headers
```Request request = new Request.Builder()
.url("https://devru-gaana-v1.p.rapidapi.com/featuredAlbums.php")
.get()
.addHeader("x-rapidapi-host", "devru-gaana-v1.p.rapidapi.com")
.addHeader("x-rapidapi-key", "mine api for site")
.build();```