OK,am new with navigation charts and data binding, tried to follow android documentation on this subject but simply can't understand what is going on.This is simply empty activity with nav drawer,but how,for a love of god, i switch to another fragment when i click on some item in nav drawer?
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private AppBarConfiguration mAppBarConfiguration;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = findViewById(R.id.drawer_layout);
NavigationView navigationView = findViewById(R.id.nav_view);
// Passing each menu ID as a set of Ids because each
// menu should be considered as top level destinations.
mAppBarConfiguration = new AppBarConfiguration.Builder(
R.id.nav_home_fragment, R.id.nav_gallery_fragment, R.id.nav_slideshow_fragment)
.setDrawerLayout(drawer)
.build();
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
NavigationUI.setupWithNavController(navigationView, navController);
}
@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);
return true;
}
@Override
public boolean onSupportNavigateUp() {
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
return NavigationUI.navigateUp(navController, mAppBarConfiguration)
|| super.onSupportNavigateUp();
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.pocetni_ekran: {
Navigation.findNavController(this, R.id.nav_host_fragment).navigate(R.id.nav_home_fragment);
break;
}
case R.id.galerija: {
Navigation.findNavController(this, R.id.nav_host_fragment).navigate(R.id.nav_gallery_fragment);
break;
}
case R.id.slajdsou: {
Navigation.findNavController(this, R.id.nav_host_fragment).navigate(R.id.nav_slideshow_fragment);
break;
}
}
item.setChecked(true);
return true;
}
}
and my mobile navigation xml
<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/mobile_navigation"
app:startDestination="@+id/nav_home_fragment">
<fragment
android:id="@+id/nav_home_fragment"
android:name="com.nswd.slajdmeni.ui.home.HomeFragment"
android:label="@string/menu_home"
tools:layout="@layout/fragment_home">
<action
android:id="@+id/action_HomeFragment_to_HomeSecondFragment"
app:destination="@id/nav_gallery_fragment" />
<action
android:id="@+id/action_nav_home_fragment_to_nav_slideshow_fragment"
app:destination="@id/nav_slideshow_fragment" />
</fragment>
<fragment
android:id="@+id/nav_gallery_fragment"
android:name="com.nswd.slajdmeni.ui.gallery.GalleryFragment"
android:label="@string/menu_gallery"
tools:layout="@layout/fragment_gallery" />
<fragment
android:id="@+id/nav_slideshow_fragment"
android:name="com.nswd.slajdmeni.ui.slideshow.SlideshowFragment"
android:label="@string/menu_slideshow"
tools:layout="@layout/fragment_slideshow" />
</navigation>
and my app bar xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">
<group android:checkableBehavior="single">
<item
android:id="@+id/pocetni_ekran"
android:icon="@drawable/ic_menu_camera"
android:title="@string/menu_home" />
<item
android:id="@+id/galerija"
android:icon="@drawable/ic_menu_gallery"
android:title="@string/menu_gallery" />
<item
android:id="@+id/slajdsou"
android:icon="@drawable/ic_menu_slideshow"
android:title="@string/menu_slideshow" />
</group>
</menu>
EDITED: posting my main_activity layout:
<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.drawerlayout.widget.DrawerLayout>
In your layout change the position to:
<androidx.drawerlayout.widget.DrawerLayout>
<include
.../>
<com.google.android.material.navigation.NavigationView
android:layout_gravity="start"
../>
</androidx.drawerlayout.widget.DrawerLayout>
Then replace the IDs in the activity_main_drawer to match the id defined in the navigation.xml graph