java.lang中。 RuntimeException未找到Retrofit注释。 （参数＃3） [英] java.lang. RuntimeException No Retrofit annotation found. (parameter #3)

问题描述

我正在尝试更新此 RetroFit +奥托教程，所以我的代码更新为：

I'm trying to update this RetroFit + Otto tutorial, so my code updated is:

IWeather.java

RetroFit 2. +不允许返回 void ，所以代替 void getWeather（...）我添加了呼叫<天气> getWeather（...）。

RetroFit 2.+ doesn't allow to return void, so instead of void getWeather(...) I added Call<Weather> getWeather(...).

public interface IWeather {

    @GET("/{latitude},{longitude}")
    Call<Weather> getWeather(@Path("latitude") String latitude,
                             @Path("longitude") String longitude,
                             Callback<Weather> callback);
} 

ForecastClient.java

RetroFit 2. +已更改其构造函数，因此新的 ForecastClient 具有下一个表单。 IllegalArgumentException 指向 weather.getWeather（...）方法。

RetroFit 2.+ has changed his constructor, so the new ForecastClient has the next form. The IllegalArgumentException points to the weather.getWeather(...) method.

public class ForecastClient {

    private static final String BASE_URL = "https://api.darksky.net/forecast/";
    private static final String API_KEY = "******************";
    public static final String API_URL = BASE_URL + API_KEY + "/";

    private static ForecastClient mForecastClient;
    private static Retrofit mRetroAdapter;

    public static ForecastClient getClient() {
        if (mForecastClient == null) {
            mForecastClient = new ForecastClient();
        }
        return mForecastClient;
    }

    private ForecastClient() {
        mRetroAdapter = new Retrofit.Builder()
                .baseUrl(API_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .client(new OkHttpClient())
                .build();
    }

    public void getWeather(String latitude, String longitude, Callback<Weather> callback) {
        IWeather weather = mRetroAdapter.create(IWeather.class);
        weather.getWeather(latitude, longitude, callback);
    }
}

ForecastManager.java

public class ForecastManager {

    private Context mContext;
    private Bus mBus;
    private ForecastClient sForecastClient;

    public ForecastManager(Context context, Bus bus) {
        this.mContext = context;
        this.mBus = bus;
        sForecastClient = ForecastClient.getClient();
    }

    @Subscribe
    public void onGetWeatherEvent(GetWeatherEvent getWeatherEvent) {
        String latitude = Double.toString(getWeatherEvent.getLatitude()).trim();
        String longitude = Double.toString(getWeatherEvent.getLongitude()).trim();

        Callback<Weather> callback = new Callback<Weather>() {
            @Override
            public void onResponse(Call<Weather> call, Response<Weather> response) {
                Log.d(ForecastManager.class.getSimpleName(), response.body().toString());
                mBus.post(new SendWeatherEvent(response.body()));
            }

            @Override
            public void onFailure(Call<Weather> call, Throwable t) {
                Log.e(ForecastManager.class.getSimpleName(), t.getMessage());
            }
        };

        sForecastClient.getWeather(latitude, longitude, callback);
    }
}

我收到一个No Retrofit注释，我发现了猜测原因是与我的回调有关，但它是一个RetroFit回调，所以我不明白为什么会出错。

I'm receiving a No Retrofit annotation found and I guess the reason is something related with my callback, but it is a RetroFit callback, so I don't understand why the error.

stacktrace指向MainActivity，in特别是Otto的方法 post（）带有 java.lang.RuntimeException：无法调度事件，由先前提到的错误 java.lang.IllegalArgumentException：找不到Retrofit注释。 （参数＃3）：

The stacktrace points to the MainActivity, in particular to the Otto's method post() with a java.lang.RuntimeException: Could not dispatch event, caused by the error previously mentioned java.lang.IllegalArgumentException: No Retrofit annotation found. (parameter #3):

MainActivity.java

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.activity_main_textView)
    TextView textView;
    @BindView(R.id.activity_main_button)
    Button button;

    private static final double LATITUDE = **.******;
    private static final double LONGITUDE = **.******;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ButterKnife.bind(this);
    }

    @OnClick(R.id.activity_main_button)
    public void onClick(View view) {
        BusProvider.getInstace().post(new GetWeatherEvent(LATITUDE, LONGITUDE));
    }

    @Subscribe
    public void onSendWeatherEvent(SendWeatherEvent sendWeatherEvent) {
        Weather weather = sendWeatherEvent.getWeather();
        Currently currently = weather.getCurrently();
        textView.setText(currently.getSummary());
    }

关于错误在哪里或如何处理总线订阅的任何线索，回调，等等？

Any clue about where is the error or how should I handle the bus subscriptions, the callback, etcetera?

推荐答案

java.lang.IllegalArgumentException：未找到Retrofit注释。 （参数＃3）

如错误所示，问题是 getWeather的第三个参数方法没有注释。 Callback 类用于 Call＃enqueue（回调）方法。

As the error says, the problem is that the third parameter of the getWeather method does not have an annotation. The Callback class is used for the Call#enqueue(Callback) method.

只需将 sForecastClient.getWeather（纬度，经度，回调）更改为 sForecastClient.getWeather（纬度，经度）.enqueue（回调） ）并删除第三个参数。

Simply change sForecastClient.getWeather(latitude, longitude, callback) to sForecastClient.getWeather(latitude, longitude).enqueue(callback) and remove the third parameter.

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