Android OrmLite更新時のリスト

Question

リストのアイテムが削除されているときに私のビューをリフレッシュしようとしています。私は現在AsyncTaskのonPostExecuteメソッドでビューをリフレッシュ/リロードしようとしています。これまで私が試したことはありませんでした。これは完了するのは簡単な仕事のように思えます。私のカスタムアダプターは、BaseAdapterを拡張します。私は何かシンプルなものがあることを願っています。誰も光を流すことができますか？

乾杯。

public class ItemListActivity extends OrmLiteBaseListActivity<DatabaseHelper> { 

    private final String TAG = getClass().getSimpleName(); 
    private DatabaseHelper dbHelper; 
    private ListView itemListView; 
    private ItemListAdapter listAdapter; 
    /** Called when the activity is first created. */ 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.itemslistactivity); 
     registerForContextMenu(getListView()); 
     itemListView = getListView();  
     itemListView.setOnCreateContextMenuListener(new OnCreateContextMenuListener() { 
      public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 
       MenuInflater inflater = getMenuInflater(); 
       inflater.inflate(R.menu.listview_context_menu, menu); 
      }   
     }); 
     listAdapter = new ItemListAdapter(getApplicationContext(), new ArrayList<Item>()); 
     itemListView.setAdapter(listAdapter); 

     dbHelper = getHelper(); 
     new SelectDataTask().execute(dbHelper); 

    } 

    public void add_OnClick(View v) { 
     Intent intent = new Intent(); 
     intent.setClass(this, AddItemActivity.class); 
     startActivity(intent); 
    } 



    @Override 
    public boolean onContextItemSelected(MenuItem item) { 
     AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo(); 
     Item b = (Item) listAdapter.getItem(info.position); 
     try { 
      switch (item.getItemId()) { 
       case R.id.remove_item:   
        dbHelper.getItemDao().deleteById(new Integer(b.id)); 
        listAdapter.notifyDataSetChanged(); 
        return true; 
      } 
     } catch (SQLException e) { 
      //FIXME 
      e.printStackTrace(); 
      Log.e(TAG, e.getMessage()); 
     } 
     return false; 
    } 

    private class SelectDataTask extends AsyncTask<DatabaseHelper, Void, List<Item>> { 
     private final ProgressDialog dialog = new ProgressDialog(
       ItemListActivity.this); 

     // can use UI thread here 
     protected void onPreExecute() { 
      this.dialog.setMessage("Retreiving item data..."); 
      this.dialog.show(); 
     } 

     @Override 
     protected List<Item> doInBackground(DatabaseHelper... params) { 
      List<Item> l = null; 
      try { 
       Dao<Item, Integer> dao = params[0].getItemDao(); 
       l = dao.queryForAll(); 
      } catch (SQLException e) { 
       //TODO -- cleanup 
       e.printStackTrace(); 
       Log.e(TAG, e.getMessage()); 
      } 
      return l; 
     } 

     // can use UI thread here 
     @Override 
     protected void onPostExecute(List<Item> b) { 
      listAdapter = new MyListAdapter(getApplicationContext(), b); 
      itemListView.setAdapter(listAdapter); 
      //TODO -- none of this works 
      itemListView.invalidateViews(); 
      listAdapter.notifyDataSetChanged(); 
      if (this.dialog.isShowing()) { 
       this.dialog.dismiss(); 
      } 

     } 
    } 

Answer 1

私の溶液（グループCRUD）チェック：

public class GroupsPreferenceActivity extends BaseAppActivity { 
    private DatabaseHelper dbHelper; 
    private ListView listView; 
    private GroupAdapter groupAdapter; 
    private DatabaseModel groupModel; 
    private OnDeleteListener onDeleteListener; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     setContentView(R.layout.group_preference_layout); 
     setDbHelper(new DatabaseHelper(getApplicationContext())); 
     setGroupModel(new DatabaseModel(getDbHelper(), GroupData.class)); 
     setListView((ListView) findViewById(R.id.lv_group)); 
     setGroupAdapter(new GroupAdapter(GroupsPreferenceActivity.this)); 
     getListView().setAdapter(getGroupAdapter()); 
     setOnDeleteListener(new OnDeleteListener() { 
      @Override 
      public void onClick(GroupData group) { 
       removeGroup(group); 
      } 
     }); 
     getListView().setOnItemClickListener(new OnItemClickListener() { 

      @Override 
      public void onItemClick(AdapterView<?> adapter, View parent, 
        int position, long id) { 
       addGroup(getGroupAdapter().getItem(position)); 
      } 
     }); 
     getGroupAdapter().setOnDeleteListener(getOnDeleteListener()); 
     doLoadGroups(); 
    } 

    private void doLoadGroups() { 
     getGroupAdapter().clear(); 
     List<?> items = getGroupModel().getAll(); 
     for (Object group : items) { 
      getGroupAdapter().add((GroupData) group); 
     } 
     getGroupAdapter().notifyDataSetChanged(); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     super.onCreateOptionsMenu(menu); 
     getSupportMenuInflater().inflate(R.menu.groups_preference_menu, menu); 
     return true; 
    } 

    @Override 
    public boolean onMenuItemSelected(int featureId, MenuItem item) { 
     super.onMenuItemSelected(featureId, item); 
     switch (item.getItemId()) { 
     case R.id.option_item_add_group: 
      addGroup(); 
      break; 

     default: 
      break; 
     } 
     return true; 
    } 

    private void addGroup() { 
     addGroup(null); 
    } 

    private void addGroup(final GroupData groupData) { 
     LayoutInflater factory = LayoutInflater 
       .from(GroupsPreferenceActivity.this); 
     final View textEntryView = factory.inflate(
       R.layout.create_group_dialog_view, null); 
     final EditText editName = (EditText) textEntryView 
       .findViewById(R.id.tv_group_name); 
     String positiveButtonName = getString(R.string.create); 
     OnClickListener positiveListener = new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog, int id) { 
       createGroup(editName.getText().toString()); 
      } 
     }; 
     if (groupData != null) { 
      positiveButtonName = getString(R.string.update); 
      editName.setText(groupData.getName()); 
      positiveListener = new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialog, int id) { 
        groupData.setName(editName.getText().toString()); 
        updateGroup(groupData); 
       } 
      }; 
     } 
     AlertDialog.Builder builder = new AlertDialog.Builder(
       GroupsPreferenceActivity.this); 
     String title = getString(R.string.preference_add_group); 

     builder.setCancelable(true) 
       .setTitle(title) 
       .setView(textEntryView) 
       .setPositiveButton(positiveButtonName, positiveListener) 
       .setNegativeButton(getString(R.string.cancel), 
         new DialogInterface.OnClickListener() { 
          public void onClick(DialogInterface dialog, int id) { 
           dialog.cancel(); 
          } 
         }); 
     final AlertDialog alert = builder.create(); 
     alert.show(); 
     final Button yesButton = alert.getButton(Dialog.BUTTON_POSITIVE); 
     yesButton.setEnabled(false); 
     editName.addTextChangedListener(new TextWatcher() { 

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

      @Override 
      public void beforeTextChanged(CharSequence s, int start, int count, 
        int after) { 

      } 

      @Override 
      public void afterTextChanged(Editable s) { 
       yesButton.setEnabled(s.length() > 0); 
      } 
     }); 
    } 

    protected void updateGroup(GroupData groupData) { 
     getGroupModel().update(groupData); 
     doLoadGroups(); 
    } 

    protected void createGroup(String name) { 
     GroupData groupData = new GroupData(); 
     groupData.setName(name); 
     getGroupModel().add(groupData); 
     doLoadGroups(); 
    } 

    protected void removeGroup(GroupData group) { 
     getGroupModel().remove(group); 
     doLoadGroups(); 
    } 

    public DatabaseHelper getDbHelper() { 
     return dbHelper; 
    } 

    public void setDbHelper(DatabaseHelper dbHelper) { 
     this.dbHelper = dbHelper; 
    } 

    public ListView getListView() { 
     return listView; 
    } 

    public void setListView(ListView listView) { 
     this.listView = listView; 
    } 

    public GroupAdapter getGroupAdapter() { 
     return groupAdapter; 
    } 

    public void setGroupAdapter(GroupAdapter groupAdapter) { 
     this.groupAdapter = groupAdapter; 
    } 

    public DatabaseModel getGroupModel() { 
     return groupModel; 
    } 

    public void setGroupModel(DatabaseModel groupModel) { 
     this.groupModel = groupModel; 
    } 

    public OnDeleteListener getOnDeleteListener() { 
     return onDeleteListener; 
    } 

    public void setOnDeleteListener(OnDeleteListener onDeleteListener) { 
     this.onDeleteListener = onDeleteListener; 
    } 
} 

をマイDBヘルパーはあります：https://github.com/beshkenadze/android-utils/tree/master/src/net/beshkenadze/android/db