フラグメントトランザクションで破棄されたフラグメント、アクティビティを置換しようとするとエラーが発生する

Question

イメージを展開可能なビューでクリックすると、現在のフラグメントを別のフラグメントに置き換えようとしています。イメージをクリックすると、アクティビティが破壊されたことが原因だと言います。

MainActivity.java

public class MainActivity extends FragmentActivity { 

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

     // Check that the activity is using the layout version with 
     // the fragment_container FrameLayout 
     if (findViewById(R.id.fragment_container) != null) { 

      // However, if we're being restored from a previous state, 
      // then we don't need to do anything and should return or else 
      // we could end up with overlapping fragments. 
      if (savedInstanceState != null) { 
       return; 
      } 

      // Create a new Fragment to be placed in the activity layout 
      QuestionsFragment firstFragment = new QuestionsFragment(); 

      // In case this activity was started with special instructions from an 
      // Intent, pass the Intent's extras to the fragment as arguments 
      firstFragment.setArguments(getIntent().getExtras()); 

      // Add the fragment to the 'fragment_container' FrameLayout 
      getFragmentManager().beginTransaction() 
        .add(R.id.fragment_container, firstFragment).commit(); 
     } 

    } 

    public void thanksFragment(){ 
     //Adicionando código responsável pela transição do 
     //Fragmento para tela de agradecimento 
     ThanksFragment thanks = new ThanksFragment(); 

     FragmentTransaction transaction = getFragmentManager().beginTransaction(); 
     // Replace whatever is in the fragment_container view with this fragment, 
     // and add the transaction to the back stack if needed 
     transaction.replace(R.id.fragment_container, thanks); 
     transaction.addToBackStack(null); 
     // Commit the transaction 
     transaction.commit(); 
    } 
} 

QuestionsFragment.Java

public class QuestionsFragment extends Fragment{ 

    MyExpandableListAdapter listAdapter; 
    ExpandableListView expListView; 
    List<String> listDataHeader; 
    HashMap<String, Emoticons> listDataChild; 


    //private ArrayAdapter<String> mQuestionAdapter; 

    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 

     View rootView = inflater.inflate(R.layout.questions_fragment, container, false); 


     //Get the ListView 
     expListView = (ExpandableListView) rootView.findViewById(R.id.list_view); 

     //Prepare ListData 
     prepareListData(); 

     listAdapter = new MyExpandableListAdapter(QuestionsFragment.this.getActivity().getApplicationContext(), listDataHeader, listDataChild); 

     expListView.setAdapter(listAdapter); 

     // Inflate the layout for this fragment 
     return rootView; 
    } 

    /* 
    * Preparing the list data 
    */ 
    public void prepareListData() { 

     listDataHeader = new ArrayList<String>(); 
     listDataChild = new HashMap<String, Emoticons>(); 

     // Adding child data 
     listDataHeader.add("Rapidez e Eficiência no Check in:"); 
     listDataHeader.add("Rapidez e Eficiência no Check out:"); 
     listDataHeader.add("Cordialidade:"); 
     listDataHeader.add("Limpeza do Apartamento:"); 
     listDataHeader.add("Conforto do Apartamento:"); 
     listDataHeader.add("Artigos de Banho:"); 
     listDataHeader.add("Café da Manha:"); 
     listDataHeader.add("Refeições:"); 
     listDataHeader.add("Serviços de Internet:"); 
     listDataHeader.add("Serviços de Estacionamento:"); 


     // Adding child data 
     listDataChild.put(listDataHeader.get(0), new Emoticons()); 
     listDataChild.put(listDataHeader.get(1),new Emoticons()); 
     listDataChild.put(listDataHeader.get(2),new Emoticons()); 
     listDataChild.put(listDataHeader.get(3),new Emoticons()); 
     listDataChild.put(listDataHeader.get(4),new Emoticons()); 
     listDataChild.put(listDataHeader.get(5),new Emoticons()); 
     listDataChild.put(listDataHeader.get(6),new Emoticons()); 
     listDataChild.put(listDataHeader.get(7),new Emoticons()); 
     listDataChild.put(listDataHeader.get(8),new Emoticons()); 
     listDataChild.put(listDataHeader.get(9),new Emoticons()); 

    } 

} 

MyExpandableListAdapter.java

public class MyExpandableListAdapter extends BaseExpandableListAdapter { 

    private static int img1; 
    private static int img2; 
    private static int img3; 
    private static int img4; 
    private static int img5; 

    private Context _context; 
    private List<String> _listDataHeader; // header titles 
    // child data in format of header title, child title 
    private HashMap<String, Emoticons> _listDataChild; 


    public MyExpandableListAdapter(Context context, List<String> listDataHeader, 
           HashMap<String, Emoticons> listChildData) { 
     this._context = context; 
     this._listDataHeader = listDataHeader; 
     this._listDataChild = listChildData; 


    } 

    public long getChildId(int groupPosition, int childPosition) { 
     return childPosition; 
    } 

    public View getChildView(int groupPosition, final int childPosition, 
          boolean isLastChild, View convertView, ViewGroup parent) { 

     if (convertView == null) { 
      LayoutInflater infalInflater = (LayoutInflater) this._context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = infalInflater.inflate(R.layout.emoticons_question_list_item, null); 
     } 

     //Linha Importante, pois instancio um objeto que receberá o valor do Objeto armazenado no HashMap 
     final Emoticons getQuestionEmoticons = (Emoticons)_listDataChild.get(_listDataHeader.get(groupPosition)); 

     final ImageView imgBad = (ImageView) convertView.findViewById(R.id.image_bad); 
     imgBad.setImageResource(getQuestionEmoticons.getImgBad()); 

     final ImageView imgBad2 = (ImageView) convertView.findViewById(R.id.image_bad2); 
     imgBad2.setImageResource(getQuestionEmoticons.getImgBad2()); 


     final ImageView imgNormal = (ImageView) convertView.findViewById(R.id.image_normal); 
     imgNormal.setImageResource(getQuestionEmoticons.getImgNormal()); 


     final ImageView imgGood = (ImageView) convertView.findViewById(R.id.image_good); 
     imgGood.setImageResource(getQuestionEmoticons.getImgGood()); 

     final ImageView imgExcelent = (ImageView) convertView.findViewById(R.id.image_excelent); 
     imgExcelent.setImageResource(getQuestionEmoticons.getImgExcelent()); 

     //Aqui foram adicionados os listners 
     imgBad.setClickable(true); 
     imgBad.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       getQuestionEmoticons.changeEmoticons(1); 

       imgBad.setImageResource(getQuestionEmoticons.getImgBad()); 
       imgBad2.setImageResource(getQuestionEmoticons.getImgBad2()); 
       imgNormal.setImageResource(getQuestionEmoticons.getImgNormal()); 
       imgGood.setImageResource(getQuestionEmoticons.getImgGood()); 
       imgExcelent.setImageResource(getQuestionEmoticons.getImgExcelent()); 

       MainActivity main = new MainActivity(); 
       main.thanksFragment(); 
      } 
     }); 

     imgBad2.setClickable(true); 
     imgBad2.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       getQuestionEmoticons.changeEmoticons(2); 

       imgBad.setImageResource(getQuestionEmoticons.getImgBad()); 
       imgBad2.setImageResource(getQuestionEmoticons.getImgBad2()); 
       imgNormal.setImageResource(getQuestionEmoticons.getImgNormal()); 
       imgGood.setImageResource(getQuestionEmoticons.getImgGood()); 
       imgExcelent.setImageResource(getQuestionEmoticons.getImgExcelent()); 
      } 
     }); 

     imgNormal.setClickable(true); 
     imgNormal.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       getQuestionEmoticons.changeEmoticons(3); 

       imgBad.setImageResource(getQuestionEmoticons.getImgBad()); 
       imgBad2.setImageResource(getQuestionEmoticons.getImgBad2()); 
       imgNormal.setImageResource(getQuestionEmoticons.getImgNormal()); 
       imgGood.setImageResource(getQuestionEmoticons.getImgGood()); 
       imgExcelent.setImageResource(getQuestionEmoticons.getImgExcelent()); 
      } 
     }); 

     imgGood.setClickable(true); 
     imgGood.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       getQuestionEmoticons.changeEmoticons(4); 

       imgBad.setImageResource(getQuestionEmoticons.getImgBad()); 
       imgBad2.setImageResource(getQuestionEmoticons.getImgBad2()); 
       imgNormal.setImageResource(getQuestionEmoticons.getImgNormal()); 
       imgGood.setImageResource(getQuestionEmoticons.getImgGood()); 
       imgExcelent.setImageResource(getQuestionEmoticons.getImgExcelent()); 
      } 
     }); 

     imgExcelent.setClickable(true); 
     imgExcelent.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       getQuestionEmoticons.changeEmoticons(5); 

       imgBad.setImageResource(getQuestionEmoticons.getImgBad()); 
       imgBad2.setImageResource(getQuestionEmoticons.getImgBad2()); 
       imgNormal.setImageResource(getQuestionEmoticons.getImgNormal()); 
       imgGood.setImageResource(getQuestionEmoticons.getImgGood()); 
       imgExcelent.setImageResource(getQuestionEmoticons.getImgExcelent()); 
      } 
     }); 

      return convertView; 
    } 


    public Object getGroup(int groupPosition) { 
     return this._listDataHeader.get(groupPosition); 
    } 

    @Override 
    public Object getChild(int groupPosition, int childPosition) { 
     return null; 
    } 

    public int getGroupCount() { 
     return this._listDataHeader.size(); 
    } 

    @Override 
    public int getChildrenCount(int groupPosition) { 
     return 1; 
    } 

    public long getGroupId(int groupPosition) { 
     return groupPosition; 
    } 

    public View getGroupView(int groupPosition, boolean isExpanded, 
          View convertView, ViewGroup parent) { 
     String headerTitle = (String) getGroup(groupPosition); 
     if (convertView == null) { 
      LayoutInflater infalInflater = (LayoutInflater) this._context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = infalInflater.inflate(R.layout.question_list_item, null); 
     } 

     TextView txtListGroup = (TextView) convertView 
       .findViewById(R.id.question_list_item_textview); 
     txtListGroup.setText(headerTitle); 

     return convertView; 
    } 

    public boolean hasStableIds() { 
     return false; 
    } 

    public boolean isChildSelectable(int groupPosition, int childPosition) { 
     return true; 
    } 

} 

そして、これは私が手にエラーがある：

FATAL EXCEPTION: main 
                       Process: br.ind.uptech.princessfeedback, PID: 6631 
                       java.lang.IllegalStateException: Activity has been destroyed 
                        at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1365) 
                        at android.app.BackStackRecord.commitInternal(BackStackRecord.java:729) 
                        at android.app.BackStackRecord.commit(BackStackRecord.java:705) 
                        at br.ind.uptech.princessfeedback.MainActivity.thanksFragment(MainActivity.java:54) 
                        at 

    br.ind.uptech.princessfeedback.MyExpandableListAdapter$1.onClick(MyExpandableListAdapter.java:96) 
                         at android.view.View.performClick(View.java:5242) 
                         at android.view.View$PerformClick.run(View.java:21156) 
                         at android.os.Handler.handleCallback(Handler.java:739) 
                         at android.os.Handler.dispatchMessage(Handler.java:95) 
                         at android.os.Looper.loop(Looper.java:145) 
                         at android.app.ActivityThread.main(ActivityThread.java:6862) 
                         at java.lang.reflect.Method.invoke(Native Method) 
                         at java.lang.reflect.Method.invoke(Method.java:372) 
                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404) 
                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199) 

ありがとう非常に多く！

Answer 1

ここに問題があると思います。自分でMainActivityを新しくするべきではありません。 MyExpandableListAdapterからMainActivityのメソッドを呼び出す場合は、そのアクティビティ参照を渡すことができます。安全のために、あなたはQuestionsFragmentでコールバックを使うことができます。

---

//Aqui foram adicionados os listners 
    imgBad.setClickable(true); 
    imgBad.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      getQuestionEmoticons.changeEmoticons(1); 

      imgBad.setImageResource(getQuestionEmoticons.getImgBad()); 
      imgBad2.setImageResource(getQuestionEmoticons.getImgBad2()); 
      imgNormal.setImageResource(getQuestionEmoticons.getImgNormal()); 
      imgGood.setImageResource(getQuestionEmoticons.getImgGood()); 
      imgExcelent.setImageResource(getQuestionEmoticons.getImgExcelent()); 

      MainActivity main = new MainActivity(); 
      main.thanksFragment(); 
     } 
    });