ListFragment（或 Fragment）中的 BaseAdapter 不起作用
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【中文标题】ListFragment（或 Fragment）中的 BaseAdapter 不起作用【英文标题】：BaseAdapter in ListFragment (or Fragment) doesn't working 【发布时间】：2015-03-07 08:11:06 【问题描述】：我试图在一个 Activity 中显示一个列表视图并且它有效，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无法使用。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：
01-09 03:10:37.807：E/androidRuntime(1248)：致命异常：主要 01-09 03:10:37.807: E/AndroidRuntime(1248): java.lang.RuntimeException: 无法启动活动 ComponentInfocom.app/com.app.TelaPrincipal: java.lang.RuntimeException: 你的内容必须有id属性为'android.R.id.list'的ListView
那么，我需要在 TelaPrincipal.java 上创建任何列表吗？
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_
android:layout_
android:orientation="vertical"
tools:context="$relativePackage.$activityClass" >
<LinearLayout
android:id="@+id/fragmentcontainer"
android:layout_weight="100"
android:layout_
android:layout_
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
教授.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_
android:layout_
android:orientation="horizontal">
<LinearLayout
android:layout_
android:layout_
android:orientation="vertical"
android:layout_weight="10">
</LinearLayout>
<LinearLayout
android:layout_
android:layout_
android:orientation="horizontal"
android:layout_weight="1">
<View
android:layout_
android:layout_
android:background="@color/vermelho_linha">
</View>
</LinearLayout>
<LinearLayout
android:layout_
android:layout_
android:orientation="vertical"
android:padding="5dp"
android:layout_weight="89">
<LinearLayout
android:layout_
android:layout_
android:orientation="vertical">
<RelativeLayout
android:layout_
android:layout_>
<TextView
android:id="@+id/professor_tvNome"
android:layout_
android:layout_
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_
android:layout_
android:orientation="vertical">
<RelativeLayout
android:layout_
android:layout_>
<TextView
android:id="@+id/professor_tvDisciplina"
android:layout_
android:layout_
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_
android:layout_
android:orientation="horizontal"
android:paddingTop="5dp">
<LinearLayout
android:layout_
android:layout_
android:layout_weight="50"
android:orientation="vertical">
<RelativeLayout
android:layout_
android:layout_>
<TextView
android:id="@+id/professor_tvAvalicaoes"
android:layout_
android:layout_
android:textSize="15sp"
android:layout_centerInParent="true"
android:textColor="@color/preto"
android:text="TextView" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:layout_
android:layout_
android:layout_weight="50"
android:orientation="vertical">
<RelativeLayout
android:layout_
android:layout_>
<TextView
android:id="@+id/professor_tvAprovacoes"
android:layout_
android:layout_
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
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_profes-s-res.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical" >
<ListView
android:id="@+id/lista_professores"
android:layout_
android:layout_
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 ComponentInfocom.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.access$600(ActivityThread.java:130)
01-09 03:10:37.807: E/AndroidRuntime(1248): at android.app.ActivityThread$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【问题讨论】：
您发布了所有代码，但没有说明问题所在。只是说“不工作”是没有用的。 我已经更新了我认为是问题所在的地方。问题基本上是，当我使用 ListView 在 Activity 上运行此代码时，它会运行，而在 Fragment 或 ListFragment 上，它会在调用 ActivityHost 时崩溃。 请放崩溃的logcat跟踪 我不知道如何显示“11 more..”消息，够吗？ 请看我的回答 【参考方案1】：它崩溃了，因为您需要将 listview 的 id 设置为 android.R.id.list
像这样更改布局xml flista_professores
<?xml version="1.0" encoding="utf-8"?>
<ListView
android:id="@android:id/list"
android:layout_
android:layout_
android:scrollbars="vertical"
android:divider="@color/azul_linha"
android:dividerHeight="1dp"
style="@style/DropDownListView.Cadernotema">
</ListView>
【讨论】：
我收到错误“解析 XML 时出错：未绑定前缀”。我在 listView 上添加了“xmlns:android="schemas.android.com/apk/res/android" 并且它起作用了！非常感谢你，我为此苦苦挣扎了两天，一遍又一遍地阅读所有 java 文件。 你知道大多数时候logcat错误足以得到错误。只需要了解它。 请注意，在我的代码中没有LinearLayout，只有带有列表名称的ListView，它正在工作，添加或不添加linearlayout有什么区别吗？【参考方案2】：Logcat 说“你的内容必须有一个 id 属性为 'android.R.id.list' 的 ListView”
根据docListFragmant
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？
【讨论】：
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