ArrayList from Fragment to Activity then to another Fragment

Question

Когда я удаляю из mMovements ArrayList в методе onCreateView WODListFragment, я вызываю setMovements из WODListActivity и передаю обновленный ArrayList (успешно).

public class WODListFragment extends ListFragment{ 
public static final String NEW_MOVE_ADDED = "new_move_in_list"; 
public static final String MOVE_REMOVED = "move_removed"; 

private ArrayList<Integer> mMovements; 

public static WODListFragment newInstance(ArrayList<Integer> moves) { 
    Bundle args = new Bundle(); 
    args.putSerializable(NEW_MOVE_ADDED, moves); 
    Log.d("fmovements", "size: " + moves.size()); 
    WODListFragment fragment = new WODListFragment(); 
    fragment.setArguments(args); 

    return fragment; 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    getActivity().setTitle(R.string.movement_title); 

    // Get the arguments that were serialized in WODListActivity. 
    Bundle args = getArguments(); 
    mMovements = (ArrayList<Integer>) args.getSerializable(NEW_MOVE_ADDED); 

    MovementsAdapter adapter = new MovementsAdapter(mMovements); 
    setListAdapter(adapter); 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup parent, 
     Bundle savedInstanceState) { 

    View v = inflater.inflate(R.layout.wod_list, parent, false); 

    // get the amount of total movements allowed in the wod 
    Intent i = getActivity().getIntent(); 
    int moveCount = i.getExtras().getInt("count"); 

    final Button finalize_wod = (Button)v.findViewById(R.id.finalize_wod); 
    final Button delete_move = (Button)v.findViewById(R.id.delete_move); 
    final TextView wod_scoring = (TextView)v.findViewById(R.id.wod_scoring); 
    final Button start_wod = (Button)v.findViewById(R.id.start_wod); 

    // show finalize button when wod is full 
    if (mMovements.size() == moveCount) { 
     finalize_wod.setVisibility(View.VISIBLE); 
    } 

    // set finalize button 
    finalize_wod.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      // change visible buttons on finalize click 
      finalize_wod.setVisibility(View.GONE); 
      delete_move.setVisibility(View.GONE); 
      wod_scoring.setVisibility(View.VISIBLE); 
      start_wod.setVisibility(View.VISIBLE); 

      Movement m = new Movement(); 

      if (mMovements.size() == 3) { // 3x3 
       wod_scoring.setText(m.scoringExpl[0]); 
      } 
      else if (mMovements.size() == 2) { // 21-15-9 
       wod_scoring.setText(m.scoringExpl[1]); 
      } 
      else // max effort 
       wod_scoring.setText(m.scoringExpl[2]); 

      // set start wod button 
      start_wod.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        // access stopwatch so user can start their wod 
       } 
      }); // end of start_wod setOnClickListener 
     } 
    }); // end of finalize_wod setOnClickListener 


    // set delete button 
    delete_move.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Toast.makeText(v.getContext(), "delete", 
        Toast.LENGTH_SHORT).show(); 
      mMovements.remove(mMovements.size() - 1); 

      // update the listView with the value deleted 
      ((MovementsAdapter)getListAdapter()).notifyDataSetChanged(); 

      Activity activity = getActivity(); 

      if(activity instanceof WODListActivity) { 
       ((WODListActivity) activity).setMovements(mMovements); 
      } 

      finalize_wod.setVisibility(View.GONE); 
     } 
    }); // end of delete_move setOnClickListener 

    return v; 
} 

public class MovementsAdapter extends ArrayAdapter<Integer> { 
    public MovementsAdapter(ArrayList<Integer> movements) { 
     super(getActivity(), 0, movements); 
     Log.d("testing", "here" + " " + movements.size()); 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) 
     if (convertView == null) { 
      convertView = getActivity().getLayoutInflater() 
        .inflate(R.layout.wod_list_item, null); 
     } 

     final int move = getItem(position); 
     TextView movementName = (TextView)convertView.findViewById(R.id.movement_list_item_name); 
     TextView movementReps = (TextView)convertView.findViewById(R.id.movement_list_item_reps); 
     Button aboutMove = (Button)convertView.findViewById(R.id.btnViewAbout); 

     Movement m = new Movement(); 
     movementName.setText("Movement: " + m.movementNames[move]); 
     movementReps.setText("Reps: " + m.reps[move]); 

     // set about button 
     aboutMove.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       Intent describeMov = new Intent(v.getContext(), MovementDescriptionActivity.class); 

       describeMov.putExtra("id", move); 
       startActivity(describeMov); 
      } 
     }); 

     return convertView; 
    } 
} 

}

public class WODListActivity extends SingleFragmentActivity{ 

ArrayList<Integer> movements = new ArrayList<Integer>(); 

@Override 
protected Fragment createFragment() { 
    movements.addAll((Collection<? extends Integer>) getIntent().getSerializableExtra(WODListFragment.NEW_MOVE_ADDED)); 

    return WODListFragment.newInstance(movements); 
} 

@Override 
public void onPause() { 
    super.onPause(); 
    setMovements(movements); 
} 

public void setMovements(ArrayList<Integer> moves) { 

    Log.d("amovements", "size: " + moves.size()); 
    Intent data = new Intent(); 
    data.putExtra(WODListFragment.NEW_MOVE_ADDED, moves); 
    setResult(Activity.RESULT_OK, data); 
} 

}

Я пытаюсь получить этот ArrayList обратно MovementSelectionFragment и установить движений ArrayList обновленной ArrayList. В WODListActivity он передается как перемещение ArrayList. Я пробовал модифицировать метод onActivityResult в MovementSelectionFragment (наряду с примерно 100 различными комбинациями других вещей). Я также пробовал модифицировать метод onPause в WODListActivity. Во всяком случае, я расстроен, и мне нужно услышать разные взгляды.

public class MovementSelectionFragment extends Fragment{ 

private static final int REQUEST_NEW_MOVEMENT = 0; 
public static final String NEW_MOVE_ADDED = "new_move_in_list"; 
public static final String MOVE_REMOVED = "move_removed"; 

private int numSelLeft; 
private int origCount; 
private GridView mGridView; 
Boolean moveDel = false; 
/* 
* This array allows the user to select multiple workouts at once. 
* It doesn't need to be reinstantiated every time the user backs up 
* to this view. 
*/ 
private ArrayList<Integer> movements = new ArrayList<Integer>(); 

@Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setRetainInstance(true); 
    } 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup parent, 
      Bundle savedInstanceState) { 

    View v = inflater.inflate(R.layout.movement_selection, parent, false); 

    // display number of moves in wod 
    if (movements.isEmpty()) { 
     numSelLeft = displayBeforeSelect(v); 
     origCount = numSelLeft; 
    } 

    // locate gridView and assign ImageAdapter 
    mGridView = (GridView)v.findViewById(R.id.gridView); 
    mGridView.setAdapter(new ImageAdapter(v.getContext())); 

    mGridView.setOnItemClickListener(new OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> arg0, View v, int position, 
       long id) { 

      // Sending image id to WODListActivity 
      Intent movementIntent = new Intent(v.getContext(), 
        WODListActivity.class); 
      movements.add(position); // Add position of movement to array 

      v.setVisibility(View.GONE); // kill selected button 

      movementIntent.putExtra(WODListFragment.NEW_MOVE_ADDED, 
        movements); 
      movementIntent.putExtra("count", origCount); 
      startActivityForResult(movementIntent, REQUEST_NEW_MOVEMENT); 
     } 

    }); 

    return v; 
} 

@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (resultCode != Activity.RESULT_OK) { 
     return; 
    } 
} 

Спасибо.

Answer 1

Вы можете хранить ваши Adapter в Activity как поле, сделать поглотитель к нему и получить доступ к нему в фрагментах через, например, (WODListActivity) getActivity().getMovementsAdapter();