如何使用FragmentTransaction從陣列適配器到片段

Question

當我通過array adapter和fragment之間的參數，字符串用戶的值它不打印在日誌中......爲什麼？

這是我的代碼：

陣列適配器：

public abstract class PlanetAdapter extends ArrayAdapter<Planet> implements CompoundButton.OnCheckedChangeListener 

{ 

    private List<Planet> planetList; 
    private Context context ; 
    ArrayList<Birra> objects; 
    public boolean Checked; 
    private Integer[] imageId; 
    String ciao; 

    /* public PlanetAdapter(Context context) { 
     super(context, R.layout.single_listview_item); 
    } 
*/ 

public PlanetAdapter(FragmentManager fm,List<Planet> planetList, Context context,Integer[] imageId) { 


    super(context, R.layout.single_listview_item,planetList); 


    this.fm=fm; 
    this.planetList = planetList; 
    this.context = context; 
    this.imageId = imageId; 
} 






    public class PlanetHolder { 
     public TextView planetName; 
     public TextView distView; 
     public TextView valuta; 
     public CheckBox chkBox; 
     public EditText edit; 
     public TextView caratteristica; 
     public boolean checked; 
     public TextView id; 
     public ImageView imageView; 
     public Spinner spinner; 
    } 

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

    @Override 
    public Planet getItem(int position) { 
     return planetList.get(position); 
    } 




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

     View row = convertView; 
     PlanetHolder holder = null; 

     if (row == null) { 
      LayoutInflater inflater = ((Activity) context).getLayoutInflater(); 
      row = inflater.inflate(R.layout.single_listview_item, parent, false); 
      holder = new PlanetHolder(); 
      holder.planetName = (TextView) row.findViewById(R.id.name); 
      holder.distView = (TextView) row.findViewById(R.id.dist); 
      holder.valuta = (TextView) row.findViewById(R.id.valuta); 
      holder.chkBox = (CheckBox) row.findViewById(R.id.chk_box); 
      holder.edit = (EditText) row.findViewById(R.id.editText); 
      holder.spinner = (Spinner) row.findViewById(R.id.simpleSpinner); 

      holder.caratteristica=(TextView) row.findViewById(R.id.caratteristica); 
      holder.imageView = (ImageView) row.findViewById(R.id.ivImage); 
      holder.edit.setVisibility(View.GONE); 
      holder.edit.setEnabled(false); 
      holder.spinner.setVisibility(View.GONE); 

      // holder.id = (TextView) row.findViewById(R.id.id); 


      row.setTag(holder); 

     } else { 
      holder = (PlanetHolder) row.getTag(); 
     } 

     final Planet p = planetList.get(position); 
     holder.imageView.setImageResource(imageId[position]); 
     holder.planetName.setText(p.getName()); 
     holder.distView.setText("" + p.getDistance()); 
     holder.valuta.setText("" + p.getValuta()); 
     holder.chkBox.setChecked(p.isSelected()); 
     holder.chkBox.setTag(p); 
     holder.caratteristica.setText(p.getCaratteristica()); 
     holder.edit.setEnabled(false); 
     SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE); 
     boolean isChecked = states.getBoolean("holder.chkBox" + holder.planetName.getText().toString(), false); 
     System.out.println(isChecked); 
     if (isChecked) { 
      holder.chkBox.setChecked(true); 
      holder.edit.setVisibility(View.VISIBLE); 
      holder.edit.setEnabled(true); 
      holder.spinner.setVisibility(View.VISIBLE); 

      SharedPreferences statess = getContext().getSharedPreferences("states", Context.MODE_PRIVATE); 
      String string = statess.getString("finalHolder.edit" + holder.planetName.getText().toString(), holder.edit.getText().toString().trim()); 
      holder.edit.setText(string); 


     } else { 
      holder.chkBox.setChecked(false); 
      holder.edit.setVisibility(View.GONE); 
      holder.edit.setEnabled(false); 
      holder.spinner.setVisibility(View.GONE); 


     } 

     holder.chkBox.setOnCheckedChangeListener(PlanetAdapter.this); 
     // final BirraHolder finalHolder = birraHolder; 
     final PlanetHolder finalHolder = holder; 

     holder.chkBox.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (finalHolder.chkBox.isChecked()) { 
        finalHolder.edit.setVisibility(View.VISIBLE); 
        finalHolder.edit.setEnabled(true); 
        finalHolder.spinner.setVisibility(View.VISIBLE); 
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
          getContext(), 
          R.array.country_arrays, 
          android.R.layout.simple_spinner_item); 
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
        //finalHolder.spinner.setAdapter(adapter); 

        finalHolder.spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
         public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
         finalHolder.spinner.setSelection(position); 
         String selState = finalHolder.spinner.getSelectedItem().toString(); 
         System.out.println(selState); 
         Toast.makeText(
         getContext(), 
         "Clicked on Planet: " + selState + "", Toast.LENGTH_SHORT).show(); 

          Fragment fragment = new Fragment(); 
          Bundle bundle = new Bundle(); 
          bundle.putString("key", selState); 
          Log.i("BUNDLE", bundle.toString()); 
          //fragment.setArguments(bundle); 


          //frag.setArguments(bundleUp); 
          String tag = fragment.getClass().getName(); 
          FragmentManager fm = getActivity().getSupportFragmentManager(); 
          fragment.setArguments(bundle); 
          FragmentTransaction ft = fm.beginTransaction(); 
          ft.replace(R.id.fragmentContainer, fragment); 
          ft.addToBackStack(tag); 
          ft.commit(); 

         } 

         @Override 
         public void onNothingSelected(AdapterView<?> parent) { 

         } 






        }); 
        SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE); 
        SharedPreferences.Editor editor = states.edit(); 
        editor.putBoolean("holder.chkBox" + finalHolder.planetName.getText().toString(), true); 
        editor.commit(); 
        finalHolder.edit.addTextChangedListener(new TextWatcher() { 
         @Override 
         public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
         } 

         @Override 
         public void onTextChanged(CharSequence s, int start, int before, int count) { 
         } 

         @Override 
         public void afterTextChanged(Editable s) { 
          p.setQuantità(finalHolder.edit.getText().toString().trim()); 
          SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE); 
          SharedPreferences.Editor editor = states.edit(); 
          editor.putString("finalHolder.edit" + finalHolder.planetName.getText().toString(), finalHolder.edit.getText().toString().trim()); 
          editor.commit(); 


         } 
        }); 

        /* SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE); 
        SharedPreferences.Editor editor = states.edit(); 
        editor.putBoolean("holder.chkBox" + finalHolder.planetName.getText().toString(), true); 
        editor.commit();*/ 
        //Utility.putPizzaItem(p); 
        //Utility.getPizzaItem(p); 


       } else { 
        finalHolder.edit.setVisibility(View.GONE); 
        finalHolder.edit.setEnabled(false); 
        finalHolder.edit.setText(""); 
        finalHolder.spinner.setVisibility(View.GONE); 


       } 

      } 
     }); 
     /*holder.chkBox.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (finalHolder.chkBox.isChecked()) { 
        finalHolder.edit.setVisibility(View.VISIBLE); 
        finalHolder.edit.setEnabled(true); 
        SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE); 
        SharedPreferences.Editor editor = states.edit(); 
        editor.putBoolean("holder.chkBox", true); 
        //pizzaSelected.put(p.getId(), p); 
        System.out.println(p.getId()); 
       } else { 

        finalHolder.edit.setVisibility(View.GONE); 
        finalHolder.edit.setEnabled(false); 
        finalHolder.edit.setText(null); 
        pizzaSelected.remove(p.getId()); 

       } 

      } 
     }); 
*/ 


     /* finalHolder.edit.addTextChangedListener(new TextWatcher() { 
      @Override 
      public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
      } 

      @Override 
      public void onTextChanged(CharSequence s, int start, int before, int count) { 
      } 

      @Override 
      public void afterTextChanged(Editable s) { 
       p.setQuantità(finalHolder.edit.getText().toString().trim()); 
       SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE); 
       SharedPreferences.Editor editor = states.edit(); 
       editor.putString("finalHolder.edit" + finalHolder.planetName.getText().toString(), finalHolder.edit.getText().toString().trim()); 
       editor.commit(); 


      } 
     }); 
*/ 

     // holder.planetName.setText(p.getName()); 
     // holder.distView.setText("" + p.getDistance()); 
     // holder.valuta.setText("" + p.getValuta()); 
     // holder.chkBox.setChecked(p.isSelected()); 
     // holder.chkBox.setTag(p); 
     // holder.edit.setEnabled(false); 
     // holder.id.setId(p.getId()); 

     return row; 
    } 




    private FragmentManager getSupportFragmentManager() { 
     return null; 
    } 


    ArrayList<Planet> getBox() { 
     ArrayList<Planet> box = new ArrayList<Planet>(); 
     for (Planet p : planetList) { 
      if (p.isSelected()) 
       box.add(p); 
     } 
     return box; 
    } 



    } 

片斷：

 public class MyListFragment extends Fragment{ 

    String user=""; 


     Bundle arguments = getArguments(); 
       if (arguments != null) { 
         //String userId = arguments.getString("key"); 
         //System.out.println("finalmente:"+userId); 
        user = arguments.getString("key"); 


       } /*else { 
        Log.i("BUNDLE == null", "NULL"); 
       }*/ 
       System.out.println("finalmente:"+user); 
. 
. 
. 
planetList.add(new Planet(getActivity.getSupportFragmentManager(),"Margherita", "6", "€","(pomodoro e mozzarella),")); 
    planetList.add(new Planet("Diavola", "7","€","(pomodoro,mozzarella e salsiccia piccante)")); 
    planetList.add(new Planet("Bufalina", "5","€","(pomodoro e mozzarella di bufala)")); 
    planetList.add(new Planet("Marinara", "5", "€","(pomodoro)")); 
    planetList.add(new Planet("Viennese", "4", "€", "(pomodoro,mozzarella e wrustel)")); 

    plAdapter = new PlanetAdapter(getSupportFragmentManager(),planetList, getContext(),imageId) 

Answer 1

下面是一些有用的方法，以幫助掰開你的邏輯。

public Fragment buildFragment(String data) { 
    MyListFragment fragment = new MyListFragment(); 
    Bundle bundle = new Bundle(); 
    bundle.putString("key", data); 
    fragment.setArguments(bundle); 
    return fragment; 
} 

// Display Fragment in a View with ID of "menu_frame" 
public void replaceFragment(Fragment fragment, String tag) { 
    FragmentManager fm = getContextFragmentManager(this.context); 
    fm.beginTransaction() 
     .replace(R.id.menu_frame, fragment) // Make sure this ID can be found in the XML for the activity 
     .addToBackStack(tag) 
     .commit(); 
} 

// Helper method to get the FragmentManager within the adapter 
public FragmentManager getContextFragmentManager(Context context) { 
    FragmentManager fm = null; 
    if(context instanceof Activity){ 
     fm = ((Activity)context).getSupportFragmentManager(); 
    } 
    return fm; 
} 

如何接收Fragment中的參數看起來不錯。

您應該能夠使用這些方法，像這樣

finalHolder.spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
     finalHolder.spinner.setSelection(position); 
     String selState = finalHolder.spinner.getSelectedItem().toString(); 

     Fragment fragment = buildFragment(selState); 

     String tag = fragment.getClass().getName(); 
     replaceFragment(fragment, tag); 
} 

---

注：

適配器內部時，存在一個適配器沒有getActivity()方法，所以你必須投上下文。

而且getSupportFragmentManager()或getFragmentManager()最終取決於你使用的片段類 - 支持V4片段或android.app.Fragment類

請刪除從適配器此方法。

private FragmentManager getSupportFragmentManager() { 
    return null; 
}