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Code Issues Packages Projects Releases Wiki Activity

Fix back button behavior

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This commit is contained in:
topjohnwu 2019-09-28 05:01:25 -04:00
parent 6a10cc9c55
commit 5c5625911d
1 changed files with 28 additions and 31 deletions
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59
app/src/main/java/com/topjohnwu/magisk/ui/MainActivity.kt
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@ -43,12 +43,11 @@ open class MainActivity : BaseActivity<MainViewModel, ActivityMainBinding>(), Na
override val navHostId: Int = R.id.main_nav_host override val navHostId: Int = R.id.main_nav_host
override val defaultPosition: Int = 0 override val defaultPosition: Int = 0
private val navigationController get() = if (navHostId == 0) null else _navigationController private val navigationController by lazy {
private val _navigationController by lazy {
FragNavController(supportFragmentManager, navHostId) FragNavController(supportFragmentManager, navHostId)
} }
private val isRootFragment get() = private val isRootFragment get() =
navigationController?.let { it.currentStackIndex != defaultPosition } ?: false navigationController.currentStackIndex != defaultPosition
override val baseFragments: List<KClass<out Fragment>> = listOf( override val baseFragments: List<KClass<out Fragment>> = listOf(
HomeFragment::class, HomeFragment::class,
@ -68,7 +67,7 @@ open class MainActivity : BaseActivity<MainViewModel, ActivityMainBinding>(), Na
super.onCreate(savedInstanceState) super.onCreate(savedInstanceState)
navigationController?.apply { navigationController.apply {
rootFragmentListener = this@MainActivity rootFragmentListener = this@MainActivity
transactionListener = this@MainActivity transactionListener = this@MainActivity
initialize(defaultPosition, savedInstanceState) initialize(defaultPosition, savedInstanceState)
@ -90,7 +89,7 @@ open class MainActivity : BaseActivity<MainViewModel, ActivityMainBinding>(), Na
override fun onSaveInstanceState(outState: Bundle) { override fun onSaveInstanceState(outState: Bundle) {
super.onSaveInstanceState(outState) super.onSaveInstanceState(outState)
navigationController?.onSaveInstanceState(outState) navigationController.onSaveInstanceState(outState)
} }
override fun setTitle(title: CharSequence?) { override fun setTitle(title: CharSequence?) {
@ -102,30 +101,28 @@ open class MainActivity : BaseActivity<MainViewModel, ActivityMainBinding>(), Na
} }
override fun onBackPressed() { override fun onBackPressed() {
val fragment = navigationController?.currentFrag as? BaseFragment<*, *>
if (fragment?.onBackPressed() == true) {
return
}
try {
navigationController?.popFragment() ?: throw UnsupportedOperationException()
} catch (e: UnsupportedOperationException) {
when {
isRootFragment -> {
val options = FragNavTransactionOptions.newBuilder()
.transition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE)
.build()
navigationController?.switchTab(defaultPosition, options)
}
else -> super.onBackPressed()
}
}
if (binding.drawerLayout.isDrawerOpen(binding.navView)) { if (binding.drawerLayout.isDrawerOpen(binding.navView)) {
binding.drawerLayout.closeDrawer(binding.navView) binding.drawerLayout.closeDrawer(binding.navView)
} else { } else {
super.onBackPressed() val fragment = navigationController.currentFrag as? BaseFragment<*, *>
if (fragment?.onBackPressed() == true) {
return
}
try {
navigationController.popFragment()
} catch (e: UnsupportedOperationException) {
when {
isRootFragment -> {
val options = FragNavTransactionOptions.newBuilder()
.transition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE)
.build()
navigationController.switchTab(defaultPosition, options)
}
else -> super.onBackPressed()
}
}
} }
} }
@ -197,15 +194,15 @@ open class MainActivity : BaseActivity<MainViewModel, ActivityMainBinding>(), Na
override fun navigateTo(event: MagiskNavigationEvent) { override fun navigateTo(event: MagiskNavigationEvent) {
val directions = event.navDirections val directions = event.navDirections
navigationController?.defaultTransactionOptions = FragNavTransactionOptions.newBuilder() navigationController.defaultTransactionOptions = FragNavTransactionOptions.newBuilder()
.customAnimations(event.animOptions) .customAnimations(event.animOptions)
.build() .build()
navigationController?.currentStack navigationController.currentStack
?.indexOfFirst { it.javaClass == event.navOptions.popUpTo } ?.indexOfFirst { it.javaClass == event.navOptions.popUpTo }
?.let { if (it == -1) null else it } // invalidate if class is not found ?.let { if (it == -1) null else it } // invalidate if class is not found
?.let { if (event.navOptions.inclusive) it + 1 else it } ?.let { if (event.navOptions.inclusive) it + 1 else it }
?.let { navigationController?.popFragments(it) } ?.let { navigationController.popFragments(it) }
when (directions.isActivity) { when (directions.isActivity) {
true -> navigateToActivity(event) true -> navigateToActivity(event)
@ -238,9 +235,9 @@ open class MainActivity : BaseActivity<MainViewModel, ActivityMainBinding>(), Na
when (val index = baseFragments.indexOfFirst { it.java.name == destination.name }) { when (val index = baseFragments.indexOfFirst { it.java.name == destination.name }) {
-1 -> destination.newInstance() -1 -> destination.newInstance()
.apply { arguments = event.navDirections.args } .apply { arguments = event.navDirections.args }
.let { navigationController?.pushFragment(it) } .let { navigationController.pushFragment(it) }
// When it's desired that fragments of same class are put on top of one another edit this // When it's desired that fragments of same class are put on top of one another edit this
else -> navigationController?.switchTab(index) else -> navigationController.switchTab(index)
} }
} }