import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    URL url = new URL("http://www.example.com/api");
                    HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
                    httpConn.setRequestMethod("GET");
                    int responseCode = httpConn.getResponseCode();
                    if (responseCode == HttpURLConnection.HTTP_OK) {
                        // Do something with the response
                    } else {
                        // Handle error
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }
}





import com.google.gson.Gson;

// Define a model class
class MyModel {
    String field1;
    int field2;
    // ...
}

// In your API call code
if (responseCode == HttpURLConnection.HTTP_OK) {
    // Get the response body as a string
    InputStream in = httpConn.getInputStream();
    BufferedReader reader = new BufferedReader(new InputStreamReader(in));
    StringBuilder response = new StringBuilder();
    String line;
    while ((line = reader.readLine()) != null) {
        response.append(line);
    }
    reader.close();

    // Convert the response string into a model object
    Gson gson = new Gson();
    MyModel model = gson.fromJson(response.toString(), MyModel.class);

    // Do something with the model object
} else {
    // Handle error
}