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I’m trying to create a Drawer navigation menu, but when I run my app it crashes, already searched and the changes that were to be made at first I already did. Someone can help me?
Error log:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.pokedex, PID: 7212
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.example.pokedex/com.example.pokedex.ui.main.MainActivity}:
java.lang.ClassCastException: android.widget.FrameLayout cannot be cast to
androidx.drawerlayout.widget.DrawerLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3449)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at
android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.ClassCastException: android.widget.FrameLayout cannot be cast to
androidx.drawerlayout.widget.DrawerLayout
at com.example.pokedex.ui.main.MainActivity.configDrawer(MainActivity.kt:34)
at com.example.pokedex.ui.main.MainActivity.onCreate(MainActivity.kt:29)
at android.app.Activity.performCreate(Activity.java:8000)
at android.app.Activity.performCreate(Activity.java:7984)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
my Main Activity class
class MainActivity : AppCompatActivity() {
private lateinit var toggle: ActionBarDrawerToggle
private val controlador by lazy {
findNavController(R.id.pokemons_activity_nav_host)
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.main_activity)
configNavControler()
configDrawer()
}
private fun configDrawer() {
toggle = ActionBarDrawerToggle(this, drawerLayout as DrawerLayout?, R.string.open,
R.string.close)
(drawerLayout as DrawerLayout?)?.addDrawerListener(toggle)
toggle.syncState()
supportActionBar?.setDisplayHomeAsUpEnabled(true)
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
if(toggle.onOptionsItemSelected(item)){
return true
}
return super.onOptionsItemSelected(item)
}
private fun configNavControler() {
val navView: BottomNavigationView = findViewById(R.id.main_activity_bottom_navigation)
val navHostFragment = supportFragmentManager
.findFragmentById(R.id.pokemons_activity_nav_host) as NavHostFragment
val navController = navHostFragment.navController
navView.setupWithNavController(navController)
// configura para ver se o Nav View aparece ou nao
configNavView(navController, navView)
}
private fun configNavView(
navController: NavController,
navView: BottomNavigationView
) {
// pega o id do fragment e compara,se for igual, faz as atribuições necessárias (aparecer ou
desaparecer Nav View)
navController.addOnDestinationChangedListener { controller, destination, arguments ->
if (destination.id == R.id.entrada_graph) {
navView.visibility = View.GONE
} else {
navView.visibility = View.VISIBLE
}
}
}
}
activity_main xml
<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/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.main.MainActivity">
<androidx.fragment.app.FragmentContainerView
android:id="@+id/pokemons_activity_nav_host"
class="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:navGraph="@navigation/nav_graph" />
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/main_activity_bottom_navigation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="0dp"
android:layout_marginEnd="0dp"
android:background="@color/bottomNavigation"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="@menu/botao_nav_menu" />
</androidx.constraintlayout.widget.ConstraintLayout>
<com.google.android.material.navigation.NavigationView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:id="@+id/navView"
app:headerLayout="@layout/nav_header"
app:menu="@menu/nav_drawer_menu"
android:layout_gravity="start"
android:fitsSystemWindows="true"/>
</androidx.drawerlayout.widget.DrawerLayout>