ListFragment（或片段）中的 BaseAdapter 不起作用

Question

我试图在 Activity 中显示一个列表视图并且它起作用了，但是当我尝试从一个从操作栏选项卡调用的片段中显示相同的列表视图时，我的程序没有运行。我曾尝试同时使用 Fragment 和 ListFragment，但即使使用我在 Internet 上找到的一些示例也没有用。谁能帮帮我？

当我尝试启动带有操作栏的活动时遇到的错误是这样开始的：

01-09 03:10:37.807：E/AndroidRuntime(1248)：致命异常：main 01-09 03:10:37.807: E/AndroidRuntime(1248): java.lang.RuntimeException: 无法启动 activity ComponentInfo{com.app/com.app.TelaPrincipal} : java.lang.RuntimeException: 你的内容必须有一个 ListView 其 id 属性是 'android.R.id.list'

所以，我需要在 TelaPrincipal.java 上创建任何列表？

TelaPrincipal.java

package com.app;


import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBar.Tab;
import android.support.v7.app.ActionBar.TabListener;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.SearchView;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.AutoCompleteTextView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;


public class TelaPrincipal extends ActionBarActivity {

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





        ActionBar ab = getSupportActionBar(); 
        ab.setDisplayHomeAsUpEnabled(true);
        ab.setDisplayShowTitleEnabled(true);

        //setupTabs();

        ab.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        Tab tab1 = ab.newTab();
        tab1.setTag("Professores");
        tab1.setText("Professores");
        tab1.setIcon(R.drawable.ac_professores);
        tab1.setTabListener(new NavegacaoTabs(new FListaProfessores()));
        ab.addTab(tab1);

        //Adicionar outras Tabs depois

    }


    private class NavegacaoTabs implements TabListener {
        private Fragment frag;

        public NavegacaoTabs(Fragment frag){
            this.frag = frag;
        }



        @Override
        public void onTabReselected(Tab tab, FragmentTransaction ft) {
            // TODO Auto-generated method stub
            Log.i("Script", "onTabReselected()");

        }

        @Override
        public void onTabSelected(Tab tab, FragmentTransaction ft) {
            // TODO Auto-generated method stub
            getSupportActionBar().setTitle(tab.getTag().toString());

            FragmentTransaction fts = getSupportFragmentManager().beginTransaction();
            fts.replace(R.id.fragmentcontainer, frag);

            fts.commit();

        }

        @Override
        public void onTabUnselected(Tab tab, FragmentTransaction ft) {
            // TODO Auto-generated method stub
            FragmentTransaction fts = getSupportFragmentManager().beginTransaction();
            fts.remove(frag);
            fts.commit();

        }
        }

}

tela_principal.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="${relativePackage}.${activityClass}" >

    <LinearLayout
        android:id="@+id/fragmentcontainer"
        android:layout_weight="100"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >
    </LinearLayout>

</LinearLayout>

Professor.java

package com.app;

public class Professor {
    private String nome;
    private String disciplina;


    private int avaliacoes;
    private int aprovacao;
    private int reprovacao;



    public String getNome() {
        return nome;
    }
    public void setNome(String nome) {
        this.nome = nome;
    }

    public String getDisciplina() {
        return disciplina;
    }
    public void setDisciplina(String disciplina) {
        this.disciplina = disciplina;
    }




    public int getAvaliacoes() {
        return avaliacoes;
    }
    public void setAvaliacoes(int avaliacoes) {
        this.avaliacoes = avaliacoes;
    }
    public int getAprovacao() {
        return aprovacao;
    }
    public void setAprovacao(int aprovacao) {
        this.aprovacao = aprovacao;
    }
    public int getReprovacao() {
        return reprovacao;
    }
    public void setReprovacao(int reprovacao) {
        this.reprovacao = reprovacao;
    }




}

professor.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_weight="10">

    </LinearLayout>

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:layout_weight="1">

        <View
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/vermelho_linha">
        </View>

    </LinearLayout>



    <LinearLayout
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="5dp"
    android:layout_weight="89">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

             <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                    <TextView
                            android:id="@+id/professor_tvNome"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:maxLines="2"
                            android:ellipsize="end"
                            android:layout_centerInParent="true"
                            android:textSize="28sp"
                            android:textColor="@color/preto"
                            android:text="TextView" />

                    </RelativeLayout>


        </LinearLayout>

         <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

             <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                    <TextView
                         android:id="@+id/professor_tvDisciplina"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:maxLines="2"
                         android:layout_centerInParent="true"
                         android:textSize="15sp"
                         android:ellipsize="end"
                         android:textColor="@color/preto"
                         android:text="TextView" />

                    </RelativeLayout>


        </LinearLayout>

          <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:paddingTop="5dp">

              <LinearLayout
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="50"
            android:orientation="vertical">

                  <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                    <TextView
                        android:id="@+id/professor_tvAvalicaoes"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textSize="15sp"
                        android:layout_centerInParent="true"
                        android:textColor="@color/preto"
                        android:text="TextView" />


                    </RelativeLayout>


        </LinearLayout>

              <LinearLayout
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="50"
            android:orientation="vertical">

                  <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">

                    <TextView
                         android:id="@+id/professor_tvAprovacoes"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:layout_centerInParent="true"
                         android:textSize="15sp"
                         android:textColor="@color/verde"
                         android:text="TextView" />


                    </RelativeLayout>

        </LinearLayout>

        </LinearLayout>

    </LinearLayout>

    </LinearLayout>

ProfessorAdapter.java

package com.app;

import java.lang.reflect.Array;
import java.util.ArrayList;




import android.content.Context;
import android.graphics.Color;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView.FindListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class ProfessorAdapter extends BaseAdapter {
    private Context context;
    private ArrayList<Professor> lista;


    public ProfessorAdapter(Context context, ArrayList<Professor> lista){
        this.context = context;
        this.lista = lista;
    }


    @Override
    public int getCount() {
        return lista.size();
    }

    @Override
    public Object getItem(int position) {
        return lista.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        Professor professor = lista.get(position);
        View layout;



        if (convertView == null){
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            layout = inflater.inflate(R.layout.professor, null);
        }
        else{
            layout = convertView;
        }

        TextView nomeProfessor = (TextView) layout.findViewById(R.id.professor_tvNome);
        nomeProfessor.setText(professor.getNome());

        TextView avaliacoesProfessor = (TextView) layout.findViewById(R.id.professor_tvAvalicaoes);
        avaliacoesProfessor.setText(professor.getAvaliacoes() + " avaliações");

        TextView disciplinaProfessor = (TextView) layout.findViewById(R.id.professor_tvDisciplina);
        disciplinaProfessor.setText(professor.getDisciplina());


        float porcentagemAprovacao = ( (float) professor.getAprovacao() / (float) professor.getAvaliacoes() ) *100;
        TextView aprovacoesProfessor = (TextView) layout.findViewById(R.id.professor_tvAprovacoes);



        if(porcentagemAprovacao >50){

            aprovacoesProfessor.setTextColor(Color.parseColor("#00FF00"));

        }
        else{

            aprovacoesProfessor.setTextColor(Color.parseColor("#FF0000"));
        }

        String porcento = String.format("%.1f", porcentagemAprovacao);
        aprovacoesProfessor.setText(porcento + "% aprovações");




        return layout;
    }

}

FListaProfessores.java << 我认为错误出在这个文件中，我做了很多更改并尝试了所有方法都没有成功，这是我最后一次尝试。

package com.app;


import java.util.ArrayList;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.ListFragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class FListaProfessores extends ListFragment {

    ProfessorAdapter adapter;
    private static ArrayList<Professor> professores = new ArrayList<Professor>();
    private static ListView lv;

    @Override
    public void onActivityCreated(Bundle savedInstanceState){
      super.onActivityCreated(savedInstanceState);


        fillProfessores(professores);
        adapter = new ProfessorAdapter(getActivity(), professores);



        setListAdapter(adapter);

        getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // TODO Auto-generated method stub

                Professor temp = (Professor) parent.getItemAtPosition(position);
                String nomeProfessor = (String) temp.getNome();

                Toast.makeText(getView().getContext(), "Professor " + nomeProfessor + " clicado", Toast.LENGTH_SHORT).show();


            }



        });


    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View view = inflater.inflate(R.layout.flista_professores, null, false); 


        return (view);
    }





public void fillProfessores(ArrayList<Professor> professores){

        Professor professor = new Professor();
        professor.setNome("Professor 1");
        professor.setDisciplina("Materia 1");
        professor.setAvaliacoes(125);
        professor.setAprovacao(83);
        professores.add(professor);

        Professor professor2 = new Professor();
        professor2.setNome("Professor 2");
        professor2.setDisciplina("Materia 2");
        professor2.setAvaliacoes(233);
        professor2.setAprovacao(182);
        professores.add(professor2);


    }

}

flista_professres.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >


    
             
             <ListView
              android:id="@+id/lista_professores"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:scrollbars="vertical"
              android:divider="@color/azul_linha"
              android:dividerHeight="1dp"
              style="@style/DropDownListView.Cadernotema">

           </ListView>
           

 </LinearLayout>

LogCat 消息

01-09 03:10:37.807: E/AndroidRuntime(1248): FATAL EXCEPTION: main
01-09 03:10:37.807: E/AndroidRuntime(1248): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app/com.app.TelaPrincipal}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.app.ActivityThread.access0(ActivityThread.java:130)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.os.Handler.dispatchMessage(Handler.java:99)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.os.Looper.loop(Looper.java:137)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.app.ActivityThread.main(ActivityThread.java:4745)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at java.lang.reflect.Method.invokeNative(Native Method)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at java.lang.reflect.Method.invoke(Method.java:511)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at dalvik.system.NativeStart.main(Native Method)
01-09 03:10:37.807: E/AndroidRuntime(1248): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.support.v4.app.ListFragment.ensureList(ListFragment.java:344)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.support.v4.app.ListFragment.onViewCreated(ListFragment.java:145)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:961)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1126)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:548)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1163)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.app.Activity.performStart(Activity.java:5018)
01-09 03:10:37.807: E/AndroidRuntime(1248):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2032)
01-09 03:10:37.807: E/AndroidRuntime(1248):  ... 11 more

Answer 1

Logcat表示"Your content must have a ListView whose id attribute is 'android.R.id.list'"

根据文档ListFragmant

your view hierarchy must contain a ListView object with the id "@android:id/list" (or list if it's in code)

是否在 flista_professores 布局中？

Answer 2

它崩溃了，因为你需要将列表视图的 ID 作为 android.R.id.list

像这样更改布局xmlflista_professores

<?xml version="1.0" encoding="utf-8"?>
    <ListView
        android:id="@android:id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="vertical"
        android:divider="@color/azul_linha"
        android:dividerHeight="1dp"
        style="@style/DropDownListView.Cadernotema">
    </ListView>

ListFragment（或片段）中的 BaseAdapter 不起作用

BaseAdapter in ListFragment (or Fragment) doesn't working

android

android-fragments

android-listview

android-listfragment