Add ViewPager for HomeActivity and BottomNav

app/src/main/java/net/pokeranalytics/android/ui/activity/HomeActivity.kt

@@ -3,14 +3,11 @@ package net.pokeranalytics.android.ui.activity
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
-import androidx.fragment.app.Fragment
 import com.google.android.material.bottomnavigation.BottomNavigationView
 import kotlinx.android.synthetic.main.activity_home.*
 import net.pokeranalytics.android.R
 import net.pokeranalytics.android.ui.activity.components.PokerAnalyticsActivity
-import net.pokeranalytics.android.ui.fragment.HistoryFragment
-import net.pokeranalytics.android.ui.fragment.SettingsFragment
-import net.pokeranalytics.android.ui.fragment.StatsFragment
+import net.pokeranalytics.android.ui.adapter.HomePagerAdapter
 
 
 
@@ -44,7 +41,7 @@ class HomeActivity : PokerAnalyticsActivity() {
 
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
-		setContentView(net.pokeranalytics.android.R.layout.activity_home)
+		setContentView(R.layout.activity_home)
 
 		initUI()
 	}
@@ -55,6 +52,12 @@ class HomeActivity : PokerAnalyticsActivity() {
 	private fun initUI() {
 		navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)
 		navigation.selectedItemId = net.pokeranalytics.android.R.id.navigation_history
+
+		val homePagerAdapter = HomePagerAdapter(supportFragmentManager)
+		viewPager.offscreenPageLimit = 5
+		viewPager.enablePaging = false
+		viewPager.adapter = homePagerAdapter
+
 	}
 
 	/**
@@ -69,22 +72,7 @@ class HomeActivity : PokerAnalyticsActivity() {
 			else -> ""
 		}
 
-		val fragment: Fragment = when(index) {
-			0 -> HistoryFragment()
-			1 -> StatsFragment()
-			else -> SettingsFragment()
-		}
-
-		val fragmentManager = supportFragmentManager
-		val count = fragmentManager.backStackEntryCount
-		for (i in 0 until count) {
-			fragmentManager.popBackStack()
-		}
-
-		val fragmentTransaction = fragmentManager.beginTransaction()
-		fragmentTransaction.replace(net.pokeranalytics.android.R.id.container, fragment)
-		fragmentTransaction.commit()
-
+		viewPager.setCurrentItem(index, false)
 	}
 
 

app/src/main/java/net/pokeranalytics/android/ui/adapter/HomePagerAdapter.kt

@@ -0,0 +1,64 @@
+package net.pokeranalytics.android.ui.adapter
+
+import android.util.SparseArray
+import android.view.ViewGroup
+import androidx.fragment.app.FragmentManager
+import androidx.fragment.app.FragmentStatePagerAdapter
+import net.pokeranalytics.android.ui.fragment.HistoryFragment
+import net.pokeranalytics.android.ui.fragment.SettingsFragment
+import net.pokeranalytics.android.ui.fragment.StatsFragment
+import net.pokeranalytics.android.ui.fragment.components.PokerAnalyticsFragment
+import java.lang.ref.WeakReference
+
+/**
+ * Home Adapter
+ */
+class HomePagerAdapter(fragmentManager: FragmentManager) : FragmentStatePagerAdapter(fragmentManager) {
+
+	var weakReferences = SparseArray<WeakReference<PokerAnalyticsFragment>>()
+
+	override fun getItem(position: Int): PokerAnalyticsFragment {
+		return when (position) {
+			0 -> HistoryFragment.newInstance()
+			1 -> StatsFragment.newInstance()
+			2 -> SettingsFragment.newInstance()
+			else -> HistoryFragment.newInstance()
+		}
+	}
+
+	override fun getCount(): Int {
+		return 5
+	}
+
+	override fun destroyItem(container: ViewGroup, position: Int, `object`: Any) {
+		super.destroyItem(container, position, `object`)
+		weakReferences.remove(position)
+	}
+
+	override fun instantiateItem(container: ViewGroup, position: Int): Any {
+		val fragment = super.instantiateItem(container, position) as PokerAnalyticsFragment
+		weakReferences.put(position, WeakReference(fragment))
+		return fragment
+	}
+
+	override fun getItemPosition(obj: Any): Int {
+		val fragment = obj as PokerAnalyticsFragment
+		return when (fragment) {
+			HistoryFragment::class.java -> 0
+			StatsFragment::class.java -> 1
+			SettingsFragment::class.java -> 2
+			else -> -1
+		}
+	}
+
+	/**
+	 * Return the fragment at the position key
+	 */
+	fun getFragment(key: Int): PokerAnalyticsFragment? {
+		if (weakReferences.get(key) != null) {
+			return weakReferences.get(key).get()
+		}
+		return null
+	}
+
+}

app/src/main/java/net/pokeranalytics/android/ui/view/PokerAnalyticsViewPager.kt

@@ -0,0 +1,33 @@
+package net.pokeranalytics.android.ui.view
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.MotionEvent
+import androidx.viewpager.widget.ViewPager
+
+/**
+ * Poker Analytics ViewPager
+ */
+class PokerAnalyticsViewPager(context: Context, attrs: AttributeSet) : ViewPager(context, attrs) {
+
+	var enablePaging: Boolean = false
+
+	init {
+		this.enablePaging = false
+	}
+
+	override fun onTouchEvent(event: MotionEvent): Boolean {
+		return if (this.enablePaging) {
+			super.onTouchEvent(event)
+		} else false
+
+	}
+
+	override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
+		return if (this.enablePaging) {
+			super.onInterceptTouchEvent(event)
+		} else false
+
+	}
+
+}

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

@@ -15,6 +15,7 @@
 		app:layout_constraintTop_toTopOf="parent"
 		app:title="@string/app_name" />
 
+	<!--
 	<FrameLayout
 		android:id="@+id/container"
 		android:layout_width="0dp"
@@ -22,6 +23,15 @@
 		app:layout_constraintBottom_toTopOf="@+id/navigation"
 		app:layout_constraintEnd_toEndOf="parent"
 		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/toolbar" /> -->
+
+	<net.pokeranalytics.android.ui.view.PokerAnalyticsViewPager
+		android:id="@+id/viewPager"
+		android:layout_width="0dp"
+		android:layout_height="0dp"
+		app:layout_constraintBottom_toTopOf="@+id/navigation"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
 		app:layout_constraintTop_toBottomOf="@+id/toolbar" />
 
 	<com.google.android.material.bottomnavigation.BottomNavigationView