Method onCreateContextMenu of a Fragment calls the onContextItemSelected method of another Fragment

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Method onCreateContextMenu of a Fragment calls the onContextItemSelected method of another Fragment

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#1 by (1 votes)

1

I have a FragmentActivity that calls its Fragments tabbed (ViewPager).

In both of these fragments the onCreateContextMenu and onContextItemSelected methods were implemented.

In the case, it happens that when I call the context menu from a fragment's list and select an item, the called onContextItemSelected method comes from the other fragment. Therefore, any object within this method is null and generates the exception.

Fragment 1 - Purchase

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    menu.add(0, 0, 0, "Informações adicionais");
    menu.add(0, 1, 1, "Itens da Compra");
    menu.add(0, 2, 2, "Formas de Pagamento");
}

@Override
public boolean onContextItemSelected(MenuItem item) {
    AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
    dialog = new Dialog(getActivity());
    switch (item.getItemId()) {
        case 0:
            dialog.setContentView(R.layout.item_for_listview_consulta_compras);
            dialog.setTitle("Informações Adicionais");
            exibeCompra(arrayCompra.getItem(info.position));
            break;
        case 1:
            dialog.setContentView(R.layout.simple_listview);
            dialog.setTitle("Itens da Compra");
            exibeListaItens(arrayCompra.getItem(info.position));
            break;
        case 2:
            dialog.setContentView(R.layout.recebimento_forma_pagamento_layout);
            dialog.setTitle("Formas de Pagamento");
            exibeFormaPagamento(arrayCompra.getItem(info.position));
            break;
        default:
            return false;
    }
    return true;
}

Fragment 2 - Sale

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    menu.add(0, 0, 0, "Informações adicionais");
    menu.add(0, 1, 1, "Itens da Venda");
    menu.add(0, 2, 2, "Formas de Pagamento");
}

@Override
public boolean onContextItemSelected(MenuItem item) {
    AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
    dialog = new Dialog(getActivity());
    switch (item.getItemId()) {
        case 0:
            dialog.setContentView(R.layout.item_for_consulta_venda);
            dialog.setTitle("Informações Adicionais");
            exibeVenda(arrayInfoVendas.getItem(info.position));
            break;
        case 1:
            dialog.setContentView(R.layout.simple_listview);
            dialog.setTitle("Itens da Venda");
            exibeListaItens(arrayInfoVendas.getItem(info.position));
            break;
        case 2:
            dialog.setContentView(R.layout.recebimento_forma_pagamento_layout);
            dialog.setTitle("Formas de Pagamento");
            exibeFormaPagamento(arrayInfoVendas.getItem(info.position));
            break;
        default:
            return false;
    }
    return true;
}

FragmentActivity

public class ConsultaTab extends FragmentActivity implements ActionBar.TabListener {

private ViewPager viewPager;
private TabPagerAdapter myAdapter;
private ActionBar actionBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Bundle extras = getIntent().getExtras();

    Funcoes.setMenuOpcoesSempreOn(getApplicationContext());
    setContentView(R.layout.act_consulta_cliente_tab);
    setTitle(R.string.title_activity_consulta);

    myAdapter = new TabPagerAdapter(getSupportFragmentManager());
    actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
    viewPager = (ViewPager) findViewById(R.id.pager);
    viewPager.setAdapter(myAdapter);

    viewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {

        @Override
        public void onPageSelected(int position) {
            actionBar = getActionBar();
            actionBar.setSelectedNavigationItem(position);
        }

    });

    if (extras != null)
        codPessoa = extras.getLong("codPessoaErp");

    for (int i = 0; i < myAdapter.getCount(); i++) {
        actionBar.addTab(actionBar.newTab().setText(myAdapter.getPageTitle(i)).setTabListener(this));
    }

}

@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
    viewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}

@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}

When I call the context menu of the Buy fragment and select an item, for example, "Additional information", the onContextItemSelected method is run from the Sale . But this only happens when I do this first by the fragment Vendae and soon after I call the fragment Buy. The error that occurs in this scenario is a NullPointerException

android android-fragment

asked by anonymous 29.10.2015 / 20:15

1 answer

Opening HTML inside a DIV, does not retrieve the partions via GET Sugar ORM ANDROID

score 1 · Accepted Answer

There are two ways to deal with this situation:

1 - Assign a different groupId for each group of items in each menu.

Fragment Buy:

menu.add(1, 0, 0, "Informações adicionais");
menu.add(1, 1, 1, "Itens da Compra");
menu.add(1, 2, 2, "Formas de Pagamento");

Fragment Sale:

menu.add(2, 0, 0, "Informações adicionais");
menu.add(2, 1, 1, "Itens da Compra");
menu.add(2, 2, 2, "Formas de Pagamento");

In method onContextItemSelected() test if the passed item belongs to the group you want to treat

@Override
public boolean onContextItemSelected(MenuItem item) {
    if (item.getGroupId() == 1) {
        switch(item.getItemId()) {

            case ....
            case ....
            default:
                return false;
         }
         return true;        
     }
     return false;
}

2 - In method onContextItemSelected test if method getUserVisibleHint() retreat true

@Override
public boolean onContextItemSelected(MenuItem item) {
    if (getUserVisibleHint()) {
        switch(item.getItemId()) {

            case ....
            case ....
            default:
                return false;
         }
         return true;        
     }
     return false;
}

Adapted from this question from SOen.