小编Emr*_*aki的帖子

我有一个Web API和一个应用程序。所以我想注册一个应用程序，但是我遇到了问题。我用天蓝色。有我的registerapi（接口）

@FormUrlEncoded
@POST("/application/json")
public void insertUser(
        @Field("Username") String Username,
        @Field("Password") String Password,
        @Field("Email") String Email,
        Callback<Response> callback);

和我的mainactivty.java页面

public class MainActivity extends AppCompatActivity {

private EditText editTextUsername;
private EditText editTextPassword;
private EditText editTextEmail;
private Button buttonRegister;
final public static String ROOT_URL = "http://bsapmusic.azurewebsites.net/api/music/register";


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    editTextUsername = (EditText) findViewById(R.id.etusername);
    editTextPassword = (EditText) findViewById(R.id.etpassword);
    editTextEmail = (EditText) findViewById(R.id.etmail);
    buttonRegister = (Button) findViewById(R.id.btnkayit);
    buttonRegister.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            insertUser();
        }
    }); …