Question

我是应用程序构建中的菜鸟，但我正在尝试！我已经建立了应用程序的基础，首先在android studio中尝试。构建一个包含片段的菜单。但是我希望有一个菜单项链接到一个活动（因为我希望它看起来与其他活动不同。）尝试了很多，但它不起作用。你帮帮我吗？

这是我的菜单代码：

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {

    int id = item.getItemId();

    if (id == R.id.nav_camera) {

        MainFragment fragment = new MainFragment();
        android.support.v4.app.FragmentTransaction fragmentTransaction =
                getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.fragment_container, fragment);
        fragmentTransaction.commit();

    } else if (id == R.id.nav_gallery) {
        Zakkaartjes fragment = new Zakkaartjes();
        android.support.v4.app.FragmentTransaction fragmentTransaction =
                getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.fragment_container, fragment);
        fragmentTransaction.commit();

    } else if (id == R.id.nav_slideshow) {
        Rekenen fragment = new Rekenen();
        android.support.v4.app.FragmentTransaction fragmentTransaction =
                getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.fragment_container, fragment);
        fragmentTransaction.commit();

    } else if (id == R.id.nav_manage) {
         //THIS IS WHERE I WOULD LIKE TO HAVE A LINK TO MY "notities activity"

    } else if (id == R.id.nav_share) {
        Protocollen fragment = new Protocollen();
        android.support.v4.app.FragmentTransaction fragmentTransaction =
                getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.fragment_container, fragment);
        fragmentTransaction.commit();


    } else if (id == R.id.nav_send) {
        Intent emailIntent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(
                "mailto","info@verpleegkundigzakboek.nl", null));
        emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Email van verpleegkundig zakboek app");
        startActivity(Intent.createChooser(emailIntent, "Verzend e-mail"));

    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
    }

Made Notities.java（其中包含其他布局）并制作了activity_notities.xml 希望有人能帮助我吗？！

Answer 1

如果我理解正确，这应该有效：

else if (id == R.id.nav_manage) {
    Intent intent = new Intent(this, YourNextActivity.class);
    startActivity(intent);
    finish();
}

此外，您可以考虑使用switch代替大量else if：

public boolean onNavigationItemSelected(MenuItem item) {

    switch (item.getId()){
        case R.id.nav_camera:
            //your code
            break;
        case R.id.nav_gallery:
            //your code
            break;
        // add case blocks for each id you want to manage
    }
}

有关switch here的更多信息。

片段菜单中的活动

1 个答案: