相关疑难解决方法(0)

我为此感到茫然.我在ViewPager中手动切换标签.我在Activity中有这个代码:

@Override
public void onBackPressed()
{
    if (childFragmentStack.empty())
    {
        // Go to the devices screen
        Intent intent = new Intent(this, SelectDeviceActivity.class);
        startActivity(intent);
    }
    else
    {
        Fragment fragment = childFragmentStack.pop();

        if (fragment == null)
        {
            return;
        }

        processingBackStack = true;

        if (fragment instanceof ViewChildFragment)
        {
            viewFragment.activateFragment((ViewChildFragment) fragment);
            mViewPager.setCurrentItem(VIEW_FRAGMENT_INDEX, true);
        }
        else if (fragment instanceof SetupChildFragment)
        {
            setupFragment.activateFragment((SetupChildFragment) fragment);
            mViewPager.setCurrentItem(SETUP_FRAGMENT_INDEX, true); //**
        }
        else if (fragment == homeFragment)
        {
            mViewPager.setCurrentItem(HOME_FRAGMENT_INDEX, true); //**
        }

        processingBackStack = false;
    }
}

如果我在选项卡之间滚动,我将它们添加到堆栈('childFragmentStack').我正在使用FragmentPagerAdapter来处理片段.如果我执行View-> Setup-> View-> Setup之类的操作然后将其反转,它只会达到Setup-> …