从抽屉活动示例更改布局

Question

I've created a new project, starting with the "Navigation drawer activity" set by default. I wanted to change the layout when a button of the navigation drawer is pressed.

In the MainActivity.java, I added the last line here:

@SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_camera) {
            // Handle the camera action
        } else if (id == R.id.nav_gallery) {
            setContentView(R.layout.app_bar_main2);
        ...

I've also created a new layout named app_bar_main2, and added a basic TextView.

I've not done anything else (which might be why it's not working), and when I run the app and click on the gallery icon, the app closes itself.

What have I to do to make it work?

Answer 1

When you click on any option in the Navigation Drawer Activity in Android, it opens a fragment on the main UI and closes the earlier fragment by itself.

All you need to do is make a Fragment visible on the UI on the selection of an option

Here's some help about Fragments