Question

网址链接：http://www.factsplanet.info/cities.php 方法改造错误：java.lang.IllegalArgumentException

主要类

public class MainActivity extends AppCompatActivity {
    Retrofit retrofit;
    Factory service;

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

         retrofit = new Retrofit.Builder()
                .baseUrl("https://factsplanet.info/")
                .build();

       service = retrofit.create(Factory.class);

        Call<ThisIsPojo> call = service.getnames();

        call.enqueue(new Callback<ThisIsPojo>() {
            @Override
            public void onResponse(Response<ThisIsPojo> response, Retrofit retrofit) {
                Toast.makeText(MainActivity.this, response.body().getData().get(1).getCountry(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onFailure(Throwable t) {

            }
        });
    }
}

接口类：

public interface Factory {

@GET ("http://www.factsplanet.info/cities.php")
    Call<ThisIsPojo>  getnames();
}

POJO CLASS：

公共类ThisIsPojo {

    private List<Datum> data = null;
    private Map<String, Object> additionalProperties = new HashMap<String, Object>();

    public List<Datum> getData() {
        return data;
    }

    public void setData(List<Datum> data) {
        this.data = data;
    }

    public Map<String, Object> getAdditionalProperties() {
        return this.additionalProperties;
    }

    public void setAdditionalProperty(String name, Object value) {
        this.additionalProperties.put(name, value);
    }

}

错误说： java.lang.RuntimeException ：无法启动活动

java.lang.IllegalArgumentException：无法为类app.com.alphaapps.android.suntest.pojo.ThisIsPojo为方法Factory.getnames

创建转换器

Answer 1

像这样修改：

retrofit = new Retrofit.Builder().baseUrl("https://factsplanet.info/").addConverterFactory(GsonConverterFactory.create()).build();

Answer 2

你好尝试这种方式，如果它可以帮助

服务界面

<!Doctype HTML>
<html>
<body>
Enter Value: <input type="number" id='rCircle'>&nbsp
<button onclick="calcAreaCircle()">Calculate</button>
<br/>
<br/>
<span id="circleArea"></span>
<script>    
    var calcAreaCircle  = function(){
        var circle = document.getElementById("rCircle"),
        circleArea = document.getElementById("circleArea");
        radius = parseInt(circle.value,10);

        console.log(parseInt(circle.value,10));
        console.log(typeof radius+": "+radius);

        var circleResult = Math.PI * Math.pow(radius, 2);
        circleArea.innerHTML = ("The area is: " + circleResult)
    };
</script>
</body>
</html>

<强>服务类

public interface ServiceInterface {
    @GET(HttpConstants.CITIESJSON)
    Call<GeonameResponse>getCities(@Query("north")double north, @Query("south")double south, @Query("east")double east, @Query("west")double west, @Query("lang")String lang, @Query("username")String username);

    @GET(HttpConstants.USERDATAJSON)
    Call<ListData>taskData(@Query("method")String method,@Query("stdID")int stdID);

    @POST(HttpConstants.USERDATAJSON)
    Call<ListData> saveUser(@Body DataPojo pojo);
}

<强>实施

public class ServiceClass {
    static ServiceInterface serviceInterface;
//    public static final String baseUrl= HttpConstants.BASE_URL_GEONAME;
    public static final String baseUrl= HttpConstants.baseUrl;

    public static ServiceInterface connection(){
        if(serviceInterface==null){
            HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
            interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
            OkHttpClient client = new OkHttpClient();
            client.interceptors().add(new Interceptor() {
                @Override
                public Response intercept(Chain chain) throws IOException {
                    Response response=chain.proceed(chain.request());
                    return response;
                }
            });
            Retrofit retrofit = new Retrofit.Builder()
                    .client(client)
                    .addConverterFactory(GsonConverterFactory.create())
                    .baseUrl(baseUrl)
                    .build();
            serviceInterface=retrofit.create(ServiceInterface.class);
        }
        return serviceInterface;
    }
}

整个例子请访问以下链接 https://github.com/pratikvyas1991/NetworkingExample/tree/master/app/src/main/java/com/ims/tasol/networkingexample

改造错误 - java.lang.IllegalArgumentException

2 个答案: