android post请求

implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'

import retrofit2.Call;
import retrofit2.http.Body;
import retrofit2.http.POST;

public interface ApiService {
    @POST("api/login")
    Call<LoginResponse> login(@Body LoginRequest request);
}

public class LoginRequest {
    private String username;
    private String password;

    public LoginRequest(String username, String password) {
        this.username = username;
        this.password = password;
    }
}

public class LoginResponse {
    private String token;
    private String message;

    // Getters and setters
}

Retrofit retrofit = new Retrofit.Builder()
    .baseUrl("https://your-api-url.com/")
    .addConverterFactory(GsonConverterFactory.create())
    .build();

ApiService apiService = retrofit.create(ApiService.class);

LoginRequest request = new LoginRequest("user", "pass");
Call<LoginResponse> call = apiService.login(request);

call.enqueue(new Callback<LoginResponse>() {
    @Override
    public void onResponse(Call<LoginResponse> call, Response<LoginResponse> response) {
        if (response.isSuccessful()) {
            LoginResponse loginResponse = response.body();
            // Handle successful response
        } else {
            // Handle error
        }
    }

    @Override
    public void onFailure(Call<LoginResponse> call, Throwable t) {
        // Handle failure
    }
});