Question

DetailFragment.java

 public void sendPost() {
    mAPIService.savePost("O3", 2, "ssfu", "jhsgdhf", 20, "mystring", 1, "UnoiaTech", "hdbjhsdhfjsd").enqueue(new Callback<Post>() {
        @Override
        public void onResponse(Call<Post> call, Response<Post> response) {

            if (response.isSuccessful()) {
                Toast.makeText(getActivity(), "Submited" + response.body(), Toast.LENGTH_SHORT).show();
                Log.i(TAG, "post submitted to API." + response.body().toString());
            }
        }

        @Override
        public void onFailure(Call<Post> call, Throwable t) {
            Toast.makeText(getActivity(), "Error To Post API in DetailFragment", Toast.LENGTH_SHORT).show();

            Log.e(TAG, "Unable to submit post to API.");
        }
    });
}

PlanFragment.java

next_plan_btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
    detailFragment.sendPost();

}

}）;

ApiUtils.java

public class ApiUtils {

private ApiUtils() {}

public static final String BASE_URL = "http://192.168.100.14:8080";

public static APIService getAPIService() {

    return RetrofitClient.getClient(BASE_URL).create(APIService.class);
}

}

RetroClient.java

public class RetrofitClient {
private static Retrofit retrofit = null;

public static Retrofit getClient(String baseUrl) {
    if (retrofit==null) {
        retrofit = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }
    return retrofit;
}

}

ApiService.java

public interface APIService {

@POST("/deals/deal")
@FormUrlEncoded
Call<Post> savePost(@Field("bookingType") String bookingType,
                    @Field("dealPrice") int dealPrice,
                    @Field("description") String  description,
                     @Field("keyword") String keyword,
                    @Field("originalPrice") int originalPrice,
                    @Field("plan") String plan,
                    @Field("shopId") int shopId,
                    @Field("shopName") String shopName,
                    @Field("title") String title);

}

显示错误

致命的例外：主要流程：googlemap.arun.com.mywork2，PID：20969 java.lang.NullPointerException：尝试调用接口方法 “retrofit2.Call googlemap.arun.com.mywork2.data.remote.APIService.savePost（java.lang.String中， int，java.lang.String，java.lang.String，int，java.lang.String，int，空对象引用上的java.lang.String，java.lang.String）' 在 googlemap.arun.com.mywork2.DetailFragment.sendPost（DetailFragment.java:104）在 googlemap.arun.com.mywork2.PlanFragment $ 5.onClick（PlanFragment.java:85）在android.view.View.performClick（View.java:5272）在android.view.View $ PerformClick.run（View.java:21528）在android.os.Handler.handleCallback（Handler.java:815）在android.os.Handler.dispatchMessage（Handler.java:104）在android.os.Looper.loop（Looper.java:207）在android.app.ActivityThread.main（ActivityThread.java:5857） at java.lang.reflect.Method.invoke（Native Method）在 com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1026）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:887）

Retrofit2 ApiServices保存点显示空对象引用

0 个答案: