Click on the icon of the action bar to open a new entry

Question

I would like to know how to click on the icon/word in the action bar and open a new.

Here’s what I’m doing:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.marcas:
            Toast.makeText(this, "Menu Item 1 selected", Toast.LENGTH_SHORT)
                    .show();
            break;
        }

    return true;
}

It returns me the message of how I clicked on the icon, but I would like to open a new entry.

Answer 1

You can do it like this:

public boolean onOptionsItemSelected(MenuItem item) {

        int id = item.getItemId();
        if (id == R.id.menueditar) {

            Intent iedicao = new Intent(MainActivity.this, paginadeedicao.class);

            startActivity(iedicao);
            MainActivity.this.finish();
            return true;
        }
    }
    return super.onOptionsItemSelected(item);
}

where:

                Intent iedicao = new Intent(MainActivity.this, paginadeedicao.class);

You create a new Intent with the name in this case from mainActivity (current activity) to paginated.class (which is another code page)

You can also send parameters with the extra put:

    iedicao.putExtra("pagina", page);

has to come before startActivity.

You’re inflating the menu?

//coloca os ícones no menu
    @Override
    public boolean onMenuOpened(int featureId, Menu menu) {
        if(featureId == Window.FEATURE_ACTION_BAR && menu != null){
            if(menu.getClass().getSimpleName().equals("MenuBuilder")){
                try{
                    Method m = menu.getClass().getDeclaredMethod("setOptionalIconsVisible", Boolean.TYPE);
                    m.setAccessible(true);
                    m.invoke(menu, true);
                } catch(NoSuchMethodException e){
                } catch(Exception e){
                    throw new RuntimeException(e);
                }
            }
        }

        return super.onMenuOpened(featureId, menu);
    }
    //cria todos os menus
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        onMenuOpened(Window.FEATURE_ACTION_BAR, menu);
        return true;
    }
    //seta as opções de função dos itens do menu
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        int id = item.getItemId();
        if (id == R.id.menueditar) {

            startActivity(new Intent(MainActivity.this, edicao.class));
            MainActivity.this.finish();

            return true;
        }
    }
    return super.onOptionsItemSelected(item);
}

that

startActivity(new Intent(MainActivity.this, edicao.class));

is equal to that

Intent iedicao = new Intent(MainActivity.this, paginadeedicao.class);

startActivity(iedicao);