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Android Kotlin Fundamentals 03.2: Define navigation paths

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8. Task: Add an Up button in the app bar
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skysamara 2020-03-03 17:30:28 +03:00
parent 452c69c318
commit 7e229e5b07
1 changed files with 11 additions and 0 deletions
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11
AndroidTriviaFragment/app/src/main/java/com/example/android/navigation/MainActivity.kt
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@ -19,6 +19,8 @@ package com.example.android.navigation
import android.os.Bundle import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity import androidx.appcompat.app.AppCompatActivity
import androidx.databinding.DataBindingUtil import androidx.databinding.DataBindingUtil
import androidx.navigation.findNavController
import androidx.navigation.ui.NavigationUI
import com.example.android.navigation.databinding.ActivityMainBinding import com.example.android.navigation.databinding.ActivityMainBinding
class MainActivity : AppCompatActivity() { class MainActivity : AppCompatActivity() {
@ -26,8 +28,17 @@ class MainActivity : AppCompatActivity() {
super.onCreate(savedInstanceState) super.onCreate(savedInstanceState)
@Suppress("UNUSED_VARIABLE") @Suppress("UNUSED_VARIABLE")
val binding = DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main) val binding = DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main)
val navController = this.findNavController(R.id.myNavHostFragment)
NavigationUI.setupActionBarWithNavController(this, navController)
} }
override fun onSupportNavigateUp(): Boolean {
val navController = this.findNavController(R.id.myNavHostFragment)
return navController.navigateUp()
}
// TODO (01) Create the new TitleFragment // TODO (01) Create the new TitleFragment
// Select File->New->Fragment->Fragment (Blank) // Select File->New->Fragment->Fragment (Blank)