implemented a better way to animate welcome activity

app/src/main/java/com/vanced/manager/adapter/SponsorAdapter.kt

@@ -11,8 +11,6 @@ import com.vanced.manager.model.SponsorModel
 import com.vanced.manager.ui.viewmodels.HomeViewModel
 import com.vanced.manager.utils.LIGHT
 import com.vanced.manager.utils.currentTheme
-import com.vanced.manager.utils.defPrefs
-import com.vanced.manager.utils.managerTheme
 
 class SponsorAdapter(
     private val context: Context,

app/src/main/java/com/vanced/manager/adapter/WelcomePageAdapter.kt

@@ -0,0 +1,23 @@
+package com.vanced.manager.adapter
+
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentActivity
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import com.vanced.manager.ui.fragments.GrantRootFragment
+import com.vanced.manager.ui.fragments.SelectAppsFragment
+import com.vanced.manager.ui.fragments.WelcomeFragment
+
+class WelcomePageAdapter(activity: FragmentActivity) : FragmentStateAdapter(activity) {
+
+    override fun getItemCount(): Int = 3
+
+    override fun createFragment(position: Int): Fragment {
+        return when (position) {
+            0 -> WelcomeFragment()
+            1 -> SelectAppsFragment()
+            2 -> GrantRootFragment()
+            else -> throw IllegalArgumentException("Unknown fragment")
+        }
+    }
+
+}

app/src/main/java/com/vanced/manager/ui/WelcomeActivity.kt

@@ -1,21 +1,84 @@
 package com.vanced.manager.ui
 
+import android.animation.Animator
+import android.animation.ValueAnimator
 import android.os.Bundle
+import android.view.animation.AccelerateDecelerateInterpolator
 import androidx.appcompat.app.AppCompatActivity
-import androidx.navigation.findNavController
+import androidx.viewpager2.widget.ViewPager2
-import com.vanced.manager.R
+import com.vanced.manager.adapter.WelcomePageAdapter
+import com.vanced.manager.databinding.ActivityWelcomeBinding
+import kotlin.math.abs
 
 class WelcomeActivity : AppCompatActivity() {
 
-    private val navHost by lazy { findNavController(R.id.welcome_navhost) }
+    private lateinit var viewPager2: ViewPager2
+    private lateinit var binding: ActivityWelcomeBinding
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_welcome)
+        binding = ActivityWelcomeBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        viewPager2 = binding.welcomeViewpager
+        viewPager2.apply {
+            adapter = WelcomePageAdapter(this@WelcomeActivity)
+            isUserInputEnabled = false
+            setPageTransformer { page, position ->
+                page.apply {
+                    val pageWidth = width
+                    //Thank you, fragula dev!
+                    when {
+                        position > 0 && position < 1 -> {
+                            alpha = 1f
+                            translationX = 0f
+                        }
+                        position > -1 && position <= 0 -> {
+                            alpha = 1.0f - abs(position * 0.7f)
+                            translationX = -pageWidth * position / 1.3F
+                        }
+                    }
+                }
+            }
+        }
     }
 
     override fun onBackPressed() {
-        if (!navHost.popBackStack())
+        if (viewPager2.currentItem == 0) {
-            finish()
+            super.onBackPressed()
+        } else {
+            navigateTo(viewPager2.currentItem - 1)
+        }
     }
+
+    fun navigateTo(position: Int) {
+        viewPager2.currentPosition = position
+    }
+
+    //Shit way to implement animation duration, but at least it works
+    private var ViewPager2.currentPosition: Int
+        get() = currentItem
+        set(value)  {
+            val pixelsToDrag: Int = width * (value - currentItem)
+            val animator = ValueAnimator.ofInt(0, pixelsToDrag)
+            var previousValue = 0
+            animator.apply {
+                addUpdateListener { valueAnimator ->
+                    val currentValue = valueAnimator.animatedValue as Int
+                    val currentPxToDrag = (currentValue - previousValue).toFloat()
+                    fakeDragBy(-currentPxToDrag)
+                    previousValue = currentValue
+                }
+                addListener(object : Animator.AnimatorListener {
+                    override fun onAnimationStart(animation: Animator?) { beginFakeDrag() }
+                    override fun onAnimationEnd(animation: Animator?) { endFakeDrag() }
+                    override fun onAnimationCancel(animation: Animator?) {}
+                    override fun onAnimationRepeat(animation: Animator?) {}
+                })
+                interpolator = AccelerateDecelerateInterpolator()
+                duration = 500
+                start()
+            }
+        }
+
 }

app/src/main/java/com/vanced/manager/ui/core/SlidingConstraintLayout.kt

@@ -1,32 +0,0 @@
-package com.vanced.manager.ui.core
-
-import android.content.Context
-import android.util.AttributeSet
-import androidx.constraintlayout.widget.ConstraintLayout
-
-open class SlidingConstraintLayout : ConstraintLayout {
-
-    constructor(context: Context) : super(context)
-    constructor(context: Context, attrs: AttributeSet?) : super(
-        context,
-        attrs
-    )
-
-    var xFraction: Float
-        get() {
-            val width = width
-            return if (width != 0)
-                x / getWidth()
-            else
-                x
-        }
-        set(xFraction) {
-            val width = width
-            val newWidth =
-                if (width > 0)
-                    xFraction * width
-                else
-                    (1).toFloat()
-            x = newWidth
-        }
-}

app/src/main/java/com/vanced/manager/ui/core/SlidingLinearLayout.kt

@@ -1,51 +0,0 @@
-package com.vanced.manager.ui.core
-
-import android.content.Context
-import android.util.AttributeSet
-import android.widget.LinearLayout
-
-open class SlidingLinearLayout: LinearLayout {
-
-    constructor(context: Context?) : super(context)
-    constructor(context: Context?, attrs: AttributeSet?) : super(
-        context,
-        attrs
-    )
-
-    var yFraction: Float
-        get() {
-            val height = height
-            return if (height != 0)
-                y / height
-            else
-                y
-        }
-        set(yFraction) {
-            val height = height
-            val newHeight =
-                if (height > 0)
-                    yFraction * height
-                else
-                    (1).toFloat()
-            y = newHeight
-        }
-
-    var xFraction: Float
-        get() {
-            val width = width
-            return if (width != 0)
-                x / getWidth()
-            else
-                x
-        }
-        set(xFraction) {
-            val width = width
-            val newWidth =
-                    if (width > 0)
-                        xFraction * width
-                    else
-                        (1).toFloat()
-            x = newWidth
-        }
-
-}

app/src/main/java/com/vanced/manager/ui/core/SlidingSwipeRefreshLayout.kt

@@ -1,32 +0,0 @@
-package com.vanced.manager.ui.core
-
-import android.content.Context
-import android.util.AttributeSet
-import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
-
-open class SlidingSwipeRefreshLayout : SwipeRefreshLayout {
-
-    constructor(context: Context?) : super(context!!)
-    constructor(context: Context?, attrs: AttributeSet?) : super(
-        context!!,
-        attrs
-    )
-
-    var xFraction: Float
-        get() {
-            val width = width
-            return if (width != 0)
-                x / getWidth()
-            else
-                x
-        }
-        set(xFraction) {
-            val width = width
-            val newWidth =
-                if (width > 0)
-                    xFraction * width
-                else
-                    (1).toFloat()
-            x = newWidth
-        }
-}

app/src/main/java/com/vanced/manager/ui/fragments/SelectAppsFragment.kt

@@ -5,13 +5,13 @@ import android.view.LayoutInflater
 import android.view.ViewGroup
 import android.widget.Toast
 import androidx.core.content.edit
-import androidx.navigation.fragment.findNavController
 import androidx.preference.PreferenceManager.getDefaultSharedPreferences
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.vanced.manager.R
 import com.vanced.manager.adapter.SelectAppsAdapter
 import com.vanced.manager.core.ui.base.BindingFragment
 import com.vanced.manager.databinding.FragmentSelectAppsBinding
+import com.vanced.manager.ui.WelcomeActivity
 
 class SelectAppsFragment : BindingFragment<FragmentSelectAppsBinding>() {
 
@@ -52,6 +52,6 @@ class SelectAppsFragment : BindingFragment<FragmentSelectAppsBinding>() {
         selectAdapter.apps.forEach { app ->
             prefs.edit { putBoolean("enable_${app.tag}", app.isChecked) }
         }
-        findNavController().navigate(SelectAppsFragmentDirections.selectAppsToGrantRoot())
+        (requireActivity() as WelcomeActivity).navigateTo(2)
     }
 }

app/src/main/java/com/vanced/manager/ui/fragments/WelcomeFragment.kt

@@ -3,9 +3,9 @@ package com.vanced.manager.ui.fragments
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import androidx.navigation.fragment.findNavController
 import com.vanced.manager.core.ui.base.BindingFragment
 import com.vanced.manager.databinding.FragmentWelcomeBinding
+import com.vanced.manager.ui.WelcomeActivity
 
 class WelcomeFragment : BindingFragment<FragmentWelcomeBinding>() {
 
@@ -20,10 +20,8 @@ class WelcomeFragment : BindingFragment<FragmentWelcomeBinding>() {
     }
 
     private fun bindData() {
-        binding.welcomeGetStarted.setOnClickListener { navigateToWelcome() }
+        binding.welcomeGetStarted.setOnClickListener {
-    }
+            (requireActivity() as WelcomeActivity).navigateTo(1)
-
+        }
-    private fun navigateToWelcome() {
-        findNavController().navigate(WelcomeFragmentDirections.welcomeToSelectApps())
     }
 }

app/src/main/res/animator/fragment_enter_right.xml

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<set xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <objectAnimator
-        android:duration="@android:integer/config_mediumAnimTime"
-        android:valueType="floatType"
-        android:valueFrom="1.0"
-        android:valueTo="0"
-        android:propertyName="xFraction" />
-
-</set>

app/src/main/res/animator/fragment_exit_right.xml

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<set xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <objectAnimator
-        android:duration="@android:integer/config_mediumAnimTime"
-        android:valueType="floatType"
-        android:valueFrom="0"
-        android:valueTo="1.0"
-        android:propertyName="xFraction" />
-
-</set>

app/src/main/res/animator/welcome_exit.xml

@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<set xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <objectAnimator
-        android:duration="@android:integer/config_longAnimTime"
-        android:valueType="floatType"
-        android:valueFrom="0"
-        android:valueTo="-0.3"
-        android:propertyName="xFraction" />
-
-
-    <objectAnimator
-        android:duration="@android:integer/config_longAnimTime"
-        android:propertyName="alpha"
-        android:valueFrom="1"
-        android:valueTo="0.3"
-        android:valueType="floatType" />
-
-</set>

app/src/main/res/animator/welcome_pop_enter.xml

@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<set xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <objectAnimator
-        android:duration="@android:integer/config_longAnimTime"
-        android:valueType="floatType"
-        android:valueFrom="-0.3"
-        android:valueTo="0"
-        android:propertyName="xFraction" />
-
-
-    <objectAnimator
-        android:duration="@android:integer/config_longAnimTime"
-        android:propertyName="alpha"
-        android:valueFrom="0.3"
-        android:valueTo="1"
-        android:valueType="floatType" />
-
-</set>

app/src/main/res/drawable/ic_info_black_24dp.xml

@@ -1,10 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="?attr/toolbarIconColor"
-        android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM13,17h-2v-6h2v6zM13,9h-2L11,7h2v2z"/>
-
-</vector>

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

@@ -1,16 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.viewpager2.widget.ViewPager2
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/welcome_viewpager"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
+    android:layout_height="match_parent" />
-    tools:context=".ui.WelcomeActivity">
-
-    <fragment
-        android:id="@+id/welcome_navhost"
-        android:name="androidx.navigation.fragment.NavHostFragment"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        app:defaultNavHost="true"
-        app:navGraph="@navigation/welcome_navigation" />
-</RelativeLayout>

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

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
-<com.vanced.manager.ui.core.SlidingConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?colorSurface">
@@ -9,14 +10,16 @@
         android:id="@+id/grant_root_header"
         android:text="@string/are_you_rooted"
         app:layout_constraintTop_toTopOf="parent"
-        style="@style/WelcomeHeaderTitle" />
+        style="@style/WelcomeHeaderTitle"
+        tools:ignore="MissingConstraints" />
 
     <TextView
         android:id="@+id/grant_root_description"
         android:text="@string/willing_to_use_root"
         android:textSize="13sp"
         app:layout_constraintTop_toBottomOf="@id/grant_root_header"
-        style="@style/WelcomeHeaderSubtitle" />
+        style="@style/WelcomeHeaderSubtitle"
+        tools:ignore="MissingConstraints" />
 
     <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/grant_root_fab"
@@ -64,4 +67,5 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:maxImageSize="48dp" />
-</com.vanced.manager.ui.core.SlidingConstraintLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<com.vanced.manager.ui.core.SlidingConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
@@ -37,4 +37,4 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:maxImageSize="48dp" />
 
-</com.vanced.manager.ui.core.SlidingConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<com.vanced.manager.ui.core.SlidingConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -28,4 +28,5 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent" />
-</com.vanced.manager.ui.core.SlidingConstraintLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/navigation/welcome_navigation.xml

@@ -1,42 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<navigation
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/welcome_navigation"
-    app:startDestination="@id/fragment_welcome">
-
-    <fragment
-        android:id="@+id/fragment_welcome"
-        android:name="com.vanced.manager.ui.fragments.WelcomeFragment"
-        tools:layout="@layout/fragment_welcome">
-
-        <action
-            android:id="@+id/welcome_to_select_apps"
-            app:destination="@id/fragment_select_apps"
-            app:enterAnim="@animator/fragment_enter_right"
-            app:exitAnim="@animator/welcome_exit"
-            app:popEnterAnim="@animator/welcome_pop_enter"
-            app:popExitAnim="@animator/fragment_exit_right"/>
-
-    </fragment>
-
-    <fragment
-        android:id="@+id/fragment_select_apps"
-        android:name="com.vanced.manager.ui.fragments.SelectAppsFragment">
-
-        <action
-            android:id="@+id/select_apps_to_grant_root"
-            app:destination="@id/fragment_grant_root"
-            app:enterAnim="@animator/fragment_enter_right"
-            app:exitAnim="@animator/welcome_exit"
-            app:popEnterAnim="@animator/welcome_pop_enter"
-            app:popExitAnim="@animator/fragment_exit_right"/>
-
-    </fragment>
-
-    <fragment
-        android:id="@+id/fragment_grant_root"
-        android:name="com.vanced.manager.ui.fragments.GrantRootFragment" />
-
-</navigation>

app/src/main/res/values/dimens.xml

@@ -1,7 +1,6 @@
 <resources>
     <!-- Default screen margins, per the Android Design guidelines. -->
 
-    <dimen name="twelvedp">12dp</dimen>
     <dimen name="stdp">16dp</dimen>
     <dimen name="top_header_margin">128dp</dimen>
 

app/src/main/res/values/styles.xml

@@ -130,11 +130,6 @@
         <item name="android:textColor">?colorLinkImage</item>
     </style>
 
-    <style name="AboutDevNames" parent="Widget.AppCompat.TextView">
-        <item name="android:textSize">15sp</item>
-        <item name="android:textColor">?colorWelcomeHeaderSubtitle</item>
-    </style>
-
     <style name="WelcomeHeaderSubtitle" parent="Widget.AppCompat.TextView">
         <item name="android:layout_width">match_parent</item>
         <item name="android:layout_height">wrap_content</item>