Automatically reload previously selected fragment on orientation change,... (cde66e44) · Commits · e / os / App Lounge

app/src/main/java/io/eelo/appinstaller/MainActivity.kt

+30 −9

Original line number	Diff line number	Diff line
		@@ -18,11 +18,12 @@ import io.eelo.appinstaller.search.SearchFragment
		import io.eelo.appinstaller.settings.SettingsFragment
		import io.eelo.appinstaller.updates.UpdatesFragment
		import io.eelo.appinstaller.utils.Common
		import io.eelo.appinstaller.utils.Constants.CURRENTLY_SELECTED_FRAGMENT_KEY
		import io.eelo.appinstaller.utils.Constants.STORAGE_PERMISSION_REQUEST_CODE
		import kotlinx.android.synthetic.main.activity_main.*

		class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemSelectedListener {
		private var currentFragment: Fragment? = null
		private var currentFragmentId = 0
		private val homeFragment = HomeFragment()
		private val categoriesFragment = CategoriesFragment()
		private val searchFragment = SearchFragment()
		@@ -38,7 +39,15 @@ class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemS
		val installManager = installManagerGetter.connectAndGet(this)
		initialiseFragments(installManager)
		// Show the home fragment by default
		showFragment(homeFragment)
		if (savedInstanceState != null) {
		if (selectFragment(savedInstanceState.getInt(CURRENTLY_SELECTED_FRAGMENT_KEY))) {
		currentFragmentId = savedInstanceState.getInt(CURRENTLY_SELECTED_FRAGMENT_KEY)
		}
		} else {
		if (selectFragment(R.id.menu_home)) {
		currentFragmentId = R.id.menu_home
		}
		}
		}

		bottom_navigation_view.setOnNavigationItemSelectedListener(this)
		@@ -52,24 +61,32 @@ class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemS
		}

		override fun onNavigationItemSelected(item: MenuItem): Boolean {
		when {
		item.itemId == R.id.menu_home -> {
		if (selectFragment(item.itemId)) {
		currentFragmentId = item.itemId
		return true
		}
		return false
		}

		private fun selectFragment(fragmentId: Int): Boolean {
		when (fragmentId) {
		R.id.menu_home -> {
		showFragment(homeFragment)
		return true
		}
		item.itemId == R.id.menu_categories -> {
		R.id.menu_categories -> {
		showFragment(categoriesFragment)
		return true
		}
		item.itemId == R.id.menu_search -> {
		R.id.menu_search -> {
		showFragment(searchFragment)
		return true
		}
		item.itemId == R.id.menu_updates -> {
		R.id.menu_updates -> {
		showFragment(updatesFragment)
		return true
		}
		item.itemId == R.id.menu_settings -> {
		R.id.menu_settings -> {
		showFragment(settingsFragment)
		return true
		}
		@@ -82,7 +99,6 @@ class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemS
		.beginTransaction()
		.replace(R.id.frame_layout, fragment)
		.commit()
		currentFragment = fragment
		}

		@SuppressLint("RestrictedApi")
		@@ -112,6 +128,11 @@ class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemS
		}
		}

		override fun onSaveInstanceState(outState: Bundle?) {
		super.onSaveInstanceState(outState)
		outState?.putInt(CURRENTLY_SELECTED_FRAGMENT_KEY, currentFragmentId)
		}

		override fun onDestroy() {
		super.onDestroy()
		installManagerGetter.disconnect(this)

app/src/main/java/io/eelo/appinstaller/categories/CategoriesFragment.kt

+13 −0

Original line number	Diff line number	Diff line
		@@ -2,6 +2,7 @@ package io.eelo.appinstaller.categories

		import android.arch.lifecycle.Observer
		import android.arch.lifecycle.ViewModelProviders
		import android.content.res.Configuration
		import android.os.Bundle
		import android.support.v4.app.Fragment
		import android.text.TextUtils
		@@ -60,6 +61,18 @@ class CategoriesFragment : Fragment() {
		itemParams.marginStart = itemPadding
		itemParams.marginEnd = itemPadding

		// Check device orientation and increase/decrease number of columns
		val orientation = resources.configuration.orientation
		if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
		// In landscape
		applicationsCategoriesList.columnCount = 3
		gamesCategoriesList.columnCount = 3
		} else {
		// In portrait
		applicationsCategoriesList.columnCount = 2
		gamesCategoriesList.columnCount = 2
		}

		// Bind to the list of applications categories
		categoriesViewModel.getApplicationsCategories().observe(this, Observer {
		showApplicationsCategories()

app/src/main/java/io/eelo/appinstaller/utils/Constants.kt

+3 −0

Original line number	Diff line number	Diff line
		@@ -17,4 +17,7 @@ object Constants {

		// Categories
		const val CATEGORY_KEY = "category_key"

		// Home
		const val CURRENTLY_SELECTED_FRAGMENT_KEY = "currently_selected_fragment"
		}

app/src/main/res/layout/fragment_categories.xml

+0 −2

Original line number	Diff line number	Diff line
		@@ -37,7 +37,6 @@
		android:layout_height="wrap_content"
		android:layout_gravity="center_horizontal"
		android:layout_marginTop="@dimen/layout_margin_medium"
		android:columnCount="2"
		app:layout_constraintTop_toBottomOf="@id/applications_categories_title" />

		<TextView
		@@ -59,7 +58,6 @@
		android:layout_height="wrap_content"
		android:layout_gravity="center_horizontal"
		android:layout_marginTop="@dimen/layout_margin_medium"
		android:columnCount="2"
		app:layout_constraintTop_toBottomOf="@id/games_categories_title" />

		</LinearLayout>