Android - 在标签活动中更新片段

Question

我正在构建一个带有标签活动的Android应用程序。 选项卡将是用户触发长按事件时的列表 在列表中的确定项目中，上下文菜单将 打开，用户将能够选择该选项 编辑该项目。

为此，我创建了一个扩展FragmentActivity并实现ActionBar.TabListener的actitivy。

我需要做的是，当用户选择编辑项目的选项时，表单会在此列表的选项卡（片段列表）中打开，更新当前选项卡的片段。 我尝试在List活动片段中使用FragmentTransaction，但它没有用。

我尝试过的代码如下（在ListFragment中）

FragmentTransaction transaction = getFragmentManager()
                        .beginTransaction();
                transaction.replace(((ViewGroup) getView().getParent()).getId(),
                        newFragment);
                transaction.addToBackStack(null);
                transaction .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE); //
                // Commit the transaction
                transaction.commit();

有人可以帮助我吗？谢谢

编辑： FragmentActivity的布局如下：

<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
</android.support.v4.view.ViewPager>

FragmentActivity的代码如下：

public class FiltroActivity extends FragmentActivity implements
        ActionBar.TabListener {
    private ViewPager viewPager;
    private TabsPagerAdapter mAdapter;
    private ActionBar actionBar;
    // Tab titles
    private String[] tabs = { "Filtro", "Diário", "Semanal" };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.filtro_activity);
        viewPager = (ViewPager) findViewById(R.id.pager);
        actionBar = getActionBar();
        mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
        viewPager.setAdapter(mAdapter);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        for (String tab_name : tabs) {
            actionBar.addTab(actionBar.newTab().setText(tab_name)
                    .setTabListener(this));
        }
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageSelected(int position) {
                actionBar.setSelectedNavigationItem(position);
            }
            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
            }
            @Override
            public void onPageScrollStateChanged(int arg0) {
            }
        });
    }
    @Override
    public void onTabReselected(Tab tab, android.app.FragmentTransaction ft) {
    }
    @Override
    public void onTabSelected(Tab tab, android.app.FragmentTransaction ft) {
        // TODO Auto-generated method stub
    }
    @Override
    public void onTabUnselected(Tab tab, android.app.FragmentTransaction ft) {
        // TODO Auto-generated method stub
    }
}

ListFragment的代码如下：

public class ListagemFragment extends ListFragment {
    public class MyListAdapter extends ArrayAdapter<Compromisso> {
        Context myContext;
        View v;
        public MyListAdapter(Context context, int textViewResourceId,
                List<Compromisso> objects) {
            super(context, textViewResourceId, objects);
            myContext = context;
        }
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // return super.getView(position, convertView, parent);

            v = convertView;
            LayoutInflater inflater = (LayoutInflater) myContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View row = inflater.inflate(R.layout.listagem_item_activity,
                    parent, false);
            TextView label = (TextView) row.findViewById(R.id.txtTitulo);
            TextView label2 = (TextView) row.findViewById(R.id.txtData);
            if (compromissos.size() > 0) {
                label.setText(compromissos.get(position).getTitulo());
                label2.setText("Data: "
                        + Formatter.GetShortDate(compromissos.get(position)
                                .getDataInicio(), "dd/MM/yyyy HH:mm"));
            }
            return row;
        }
    }
    List<Compromisso> compromissos;
    MyListAdapter myListAdapter;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.getListaCompromisso();
        myListAdapter = new MyListAdapter(getActivity(),
                R.layout.listagem_item_activity, compromissos);
        setListAdapter(myListAdapter);
    }

    private void getListaCompromisso() {
        compromissos = new ArrayList<Compromisso>();
        CompromissoNegocio negocio = new CompromissoNegocio();
        compromissos = negocio.getListaCompromisso(getActivity()
                .getApplicationContext());
    }
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        registerForContextMenu(getListView());
        super.onActivityCreated(savedInstanceState);
    }
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        MenuInflater inflater = this.getActivity().getMenuInflater();
        inflater.inflate(R.menu.menu_listagem, menu);
    }
    @Override
    public boolean onContextItemSelected(MenuItem item) {
        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item
                .getMenuInfo();
        int position;
        Intent i;
        switch (item.getItemId()) {
        case R.id.delete_item:
            info = (AdapterContextMenuInfo) item.getMenuInfo();
            position = (int) info.position;
            CompromissoNegocio compNeg = new CompromissoNegocio();
            compNeg.Deletar(compromissos.get(position).getCompromissoID(),
                    getActivity());
            compromissos.remove(position);
            myListAdapter.notifyDataSetChanged();
            return true;
        case R.id.edit_item:
            info = (AdapterContextMenuInfo) item.getMenuInfo();
            position = (int) info.position;
            EditActivity newFragment = new EditActivity();
            FragmentTransaction transaction = getFragmentManager()
                    .beginTransaction();
            transaction.replace(((ViewGroup) getView().getParent()).getId(),
                    newFragment);
            transaction.addToBackStack(null);
            transaction
                    .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE); //
            // Commit the transaction
            transaction.commit();
            Log.i("haha", "haha");

            return true;
        default:
            return super.onContextItemSelected(item);
        }
    }

    public void onResume() {
        super.onResume();
        getListaCompromisso();
        myListAdapter.notifyDataSetChanged();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        return inflater.inflate(R.layout.listagem_activity, container, false);
    }
}