Java 片段中的接口侦听器

对不起，我的问题很简单
我有一个片段需要实现接口侦听器

package com.tumta.henrique.teste;


import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.tumta.henrique.teste.ConsultaEntidades.*;
import java.util.List;


/**
 * A simple {@link Fragment} subclass.
 */
public class EntidadeFragment extends Fragment implements ConsultaConcluidaListener {

    private static final String ARG_SECTION_NUMBER = "section_number";

    public EntidadeFragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_entidade, container, false);
        new ConsultaEntidades((ConsultaEntidades)getActivity()).execute();
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
    }

    public static EntidadeFragment newInstance(int sectionNumber){
        EntidadeFragment frag = new EntidadeFragment();
        Bundle args = new Bundle();
        args.putInt(ARG_SECTION_NUMBER, sectionNumber);
        frag.setArguments(args);
        return frag;
    }

    @Override
    public void onConsultaConcluida(List<String> result) {
        ListView listaEntidades = (ListView) getView().findViewById(R.id.listaentidades);
        ArrayAdapter arrayAdapter = new ArrayAdapter<>(getView().getContext(),android.R.layout.simple_list_item_1, result);
        listaEntidades.setAdapter(arrayAdapter);
    }
}

---

您注意到我需要在frag中实现该接口。我该怎么做呢？

您的

onCreateView中有两个错误

返回后，您正在尝试实例化

异步任务

您正在将

getActivity（）

强制转换到接口，而没有让

活动实现它
它应该是这样的：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
   new ConsultaEntidades(this).execute();
   return inflater.inflate(R.layout.fragment_entidade, container, false);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
   new ConsultaEntidades(this).execute();
   return inflater.inflate(R.layout.fragment_entidade, container, false);
}