Disclaimer: I already read the post at onClick event in navigation drawer, but sadly it does not work for me.
I am pretty new to Android I am just making my first app in Kotlin and I wanted to integrate an NavigationDrawer. In it I have integrated an option "Website" which should just launch a website. Just when I click on it it closes the drawer, but does not start the Intent for the website.
My Code: (I removed unimportant parts that are needed for the rest of the app)
MainActivity.kt:
class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {
private lateinit var drawerLayout: DrawerLayout
private lateinit var aToggle: ActionBarDrawerToggle
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(activity_main)
createNotificationChannel()
setNavigationViewListener()
val toolbar: Toolbar = toolbar
setSupportActionBar(toolbar)
val actionbar: ActionBar? = supportActionBar
actionbar?.apply {
setDisplayHomeAsUpEnabled(true)
setHomeAsUpIndicator(R.drawable.ic_menu)
}
drawerLayout = drawer_layout
aToggle = ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open, R.string.close)
drawerLayout.addDrawerListener(aToggle)
drawerLayout.addDrawerListener(
object : DrawerLayout.DrawerListener {
override fun onDrawerSlide(drawerView: View, slideOffset: Float) {
}
override fun onDrawerOpened(drawerView: View) {
}
override fun onDrawerClosed(drawerView: View) {
}
override fun onDrawerStateChanged(newState: Int) {
}
}
)
aToggle.syncState()
val navigationView: NavigationView = findViewById(R.id.nav_view)
navigationView.setNavigationItemSelectedListener { menuItem ->
// set item as selected to persist highlight
menuItem.isChecked = true
// close drawer when item is tapped
drawerLayout.closeDrawers()
// Add code here to update the UI based on the item selected
// For example, swap UI fragments here
true
}
}
private fun setNavigationViewListener() {
val navigationView = nav_view
navigationView.setNavigationItemSelectedListener(this)
}
override fun onCreateOptionsMenu(menu: Menu): Boolean {
val inflater = menuInflater
inflater.inflate(R.menu.drawer_view, menu)
return true
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
return when (item.itemId) {
android.R.id.home -> {
drawerLayout.openDrawer(GravityCompat.START)
true
}
else -> super.onOptionsItemSelected(item)
}
if(aToggle.onOptionsItemSelected(item)) {
return true
}
}
override fun onNavigationItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
R.id.website -> {
val i = Intent(Intent.ACTION_VIEW).setData(Uri.parse("http://gym-wen.de/vp/"))
startActivity(i)
drawerLayout.closeDrawer(GravityCompat.START)
return true
}
else -> {}
}
return true
}
}
activity_main.xml:
<?xml version="1.0" encoding="UTF-8"?>
<android.support.v4.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:layout_width="match_parent"
android:id="@+id/drawer_layout"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/activity_main">
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:theme="@style/ThemeOverlay.AppCompat.ActionBar" />
<ListView
android:id="@+id/vertretungs_list"
android:paddingTop="?attr/actionBarSize"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</FrameLayout>
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:menu="@menu/drawer_view" />
drawer_view.xml (menu):
<?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/website"
android:title="@string/website" />
<item
android:id="@+id/nav_gallery"
android:title="2" />
<item
android:id="@+id/nav_slideshow"
android:title="3" />
<item
android:id="@+id/nav_manage"
android:title="4" />
</group>
I am pretty sure I forgot something, but I just do not know what it is. I read many tutorials and other posts, but I just do not know it. Hopefully someone can help me :)
Greetings
