Do forgive my poor question drafting skill, please help me understand the error shown in logcat which I believe is the reason why my app stopping
My Main Activity File
package com.syddhoo.bookapp.pack
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.MenuItem
import android.widget.FrameLayout
import androidx.appcompat.widget.Toolbar
import androidx.appcompat.app.ActionBarDrawerToggle
import androidx.core.view.GravityCompat
import androidx.drawerlayout.widget.DrawerLayout
import androidx.coordinatorlayout.widget.CoordinatorLayout
import com.google.android.material.navigation.NavigationView
import com.syddhoo.bookapp.*
class MainActivity : AppCompatActivity() {
lateinit var drawerLayout: DrawerLayout
lateinit var coordinatorLayout: CoordinatorLayout
lateinit var toolbar: Toolbar
lateinit var frameLayout: FrameLayout
lateinit var navigationView: NavigationView
var previousMenuItem : MenuItem? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
drawerLayout = findViewById(R.id.drawerLayout)
coordinatorLayout = findViewById(R.id.coordinatorLayout)
toolbar = findViewById(R.id.toolbar)
frameLayout = findViewById(R.id.frameLayout)
navigationView = findViewById(R.id.navigationView)
setUpToolBar()
openDashboard()
val actionBarDrawerToggle = ActionBarDrawerToggle(this@MainActivity, drawerLayout,
R.string.open_drawer,
R.string.close_drawer
)
drawerLayout.addDrawerListener(actionBarDrawerToggle)
actionBarDrawerToggle.syncState()
navigationView.setNavigationItemSelectedListener {
if(previousMenuItem != null){
previousMenuItem?.isChecked = false
}
it.isCheckable = true
it.isChecked = true
previousMenuItem = it
when(it.itemId){
R.id.dashboard ->{
openDashboard()
drawerLayout.closeDrawers()
}
R.id.favourite ->{
supportFragmentManager.beginTransaction().replace(
R.id.frameLayout,
FavouritesFragment()
)
.commit()
supportActionBar?.title ="Favourites"
drawerLayout.closeDrawers()
}
R.id.profile ->{
supportFragmentManager.beginTransaction().replace(
R.id.frameLayout,
ProfileFragment()
)
.commit()
supportActionBar?.title ="Profile"
drawerLayout.closeDrawers()
}
R.id.about ->{
supportFragmentManager.beginTransaction().replace(
R.id.frameLayout,
AboutAppFragment()
)
.commit()
supportActionBar?.title ="About App"
drawerLayout.closeDrawers()
}
}
return@setNavigationItemSelectedListener true
}
}
fun setUpToolBar(){
setSupportActionBar(toolbar)
supportActionBar?.title = "Toolbar Title"
supportActionBar?.setHomeButtonEnabled(true)
supportActionBar?.setDisplayHomeAsUpEnabled(true)
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
val id = item.itemId
if(id== R.id.home){
drawerLayout.openDrawer(GravityCompat.START)
}
return super.onOptionsItemSelected(item)
}
fun openDashboard(){
val fragment = DashboardFragment()
val transaction = supportFragmentManager.beginTransaction()
transaction.replace(R.id.frameLayout,fragment)
transaction.commit()
supportActionBar?.title = "Dashboard"
navigationView.setCheckedItem(R.id.dashboard)
}
override fun onBackPressed() {
val frag = supportFragmentManager.findFragmentById(R.id.frameLayout)
when(frag){
!is DashboardFragment -> openDashboard()
else -> super.onBackPressed()
}
}
}
Logcat error directing towards line 34 setUpToolBar() and line 93 setSupportActionBar(toolbar) in Main Activity My Logcat
2021-05-27 20:15:40.373 30082-30082/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.syddhoo.bookapp, PID: 30082
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.syddhoo.bookapp/com.syddhoo.bookapp.pack.MainActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3792)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3968)
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$H.handleMessage(ActivityThread.java:2307)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:246)
at android.app.ActivityThread.main(ActivityThread.java:8506)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1139)
Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at androidx.appcompat.app.AppCompatDelegateImpl.setSupportActionBar(AppCompatDelegateImpl.java:572)
at androidx.appcompat.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:159)
at com.syddhoo.bookapp.pack.MainActivity.setUpToolBar(MainActivity.kt:93)
at com.syddhoo.bookapp.pack.MainActivity.onCreate(MainActivity.kt:34)
at android.app.Activity.performCreate(Activity.java:8198)
at android.app.Activity.performCreate(Activity.java:8182)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3765)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3968)
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$H.handleMessage(ActivityThread.java:2307)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:246)
at android.app.ActivityThread.main(ActivityThread.java:8506)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1139)
Error seems to be something related to Action Bar. I there something I need to import? I'm a very beginner android developer and also new to stack overflow. Any suggestions are openly welcome. Thanks in advance.
