主屏幕启动器Android

Question

I have 5 Fragments and of course my .MainActivity.

MainActivity
FragOne
FragTwo
---
FragFive

and then:

activity_main.xml
app_bar_main.xml
content_main.xml
nav_header_main.xml
lay1.xml
lay2.xml
---
lay5.xml

When the application is loaded it's a blank screen but then obviously when I click the navigation bar the pages will load.

My question is, is there anyway I can use a fragment as my launcher page, because if I tried making a home page on any other activity like content_main or acivity_main, obviously then it would show on every page which I don't want. But then if I made a new activity and set that as the launcher,obviously that would work but then my navigation bar would be missing I presume? What's the best way to go about this?

Answer 1

What you want is not that big a problem. Just load a fragment using SupportFragmentManager in your MainActivity . If this Fragment is a one time view only (before you change to your other fragments using Navigation Drawer), then a simple loading of your launcher Fragment in the MainActivity is enough.

Example for loading it once in MainActivity:

In your onCreate method in MainActivity :

///////////Setting up Fragment as Starting Page////////////
LauncherFragment fragment = new LauncherFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction =
                    getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragment,"launcher");
fragmentTransaction.commit();

This Launcher Fragment won't be seen after you change to other Fragments using NavigationDrawer (unless you call it somewhere else, which according to your question you don't want)

---

If instead of using separate LauncherFragment you decide you want to load FragOne itself, you will need to manually highlight your Drawer's First item (FragOne) after setting up FragOne

navigationView.getMenu().getItem(0).setChecked(true);       ////Set Navigation drawer manually