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Add nested navigation example and fixes
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‎Tutorial0-MaterialDesign/src/androidTest/java/com/smarttoolfactory/tutorial0_materialdesign/ExampleInstrumentedTest.kt

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This file was deleted.

‎Tutorial0-MaterialDesign/src/main/java/com/smarttoolfactory/tutorial0_materialdesign/blankfragment/BaseDataBindingFragment.kt

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@@ -22,6 +22,7 @@ abstract class BaseDataBindingFragment<ViewBinding : ViewDataBinding> : Fragment
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): View? {
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// Inflate the layout for this fragment
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dataBinding = DataBindingUtil.inflate(inflater, getLayoutRes(), container, false)
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return dataBinding.root
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}
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‎Tutorial0-MaterialDesign/src/main/java/com/smarttoolfactory/tutorial0_materialdesign/blankfragment/GenericFragment.kt

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@@ -55,6 +55,7 @@ class GenericFragment : BaseDataBindingFragment<FragmentGenericBinding>() {
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println("💀 $fragmentName onDestroy() id: $fragID, this: $this")
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}
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companion object {
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const val ARG_POSITION = "position"

‎Tutorial0-MaterialDesign/src/main/java/com/smarttoolfactory/tutorial0_materialdesign/blankfragment/GenericFragmentParent.kt

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@@ -1,10 +1,11 @@
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package com.smarttoolfactory.tutorial0_materialdesign.blankfragment
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3+
import android.content.Context
34
import android.os.Bundle
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import android.view.LayoutInflater
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import android.view.View
67
import android.view.ViewGroup
7-
import androidx.fragment.app.add
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import androidx.fragment.app.Fragment
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import androidx.fragment.app.commit
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import androidx.fragment.app.replace
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import com.smarttoolfactory.tutorial0_materialdesign.R
@@ -62,6 +63,24 @@ class GenericFragmentParent(private val fragID: Int) :
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}
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override fun onActivityCreated(savedInstanceState: Bundle?) {
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super.onActivityCreated(savedInstanceState)
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}
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override fun onAttach(context: Context) {
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super.onAttach(context)
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}
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override fun onAttachFragment(childFragment: Fragment) {
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super.onAttachFragment(childFragment)
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}
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override fun onDetach() {
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super.onDetach()
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}
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6584
override fun onDestroyView() {
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super.onDestroyView()
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println("👻 $fragmentName onDestroyView() id: $fragID, this: $this")

‎Tutorial0-MaterialDesign/src/main/java/com/smarttoolfactory/tutorial0_materialdesign/chapter0_nested_fragments/Activity0NestedFragments.kt

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
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package com.smarttoolfactory.tutorial0_materialdesign.chapter0_nested_fragments
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import android.os.Bundle
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import androidx.appcompat.app.AppCompatActivity
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class Activity0NestedFragments : AppCompatActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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}
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}

‎Tutorial0-MaterialDesign/src/main/java/com/smarttoolfactory/tutorial0_materialdesign/chapter2_1viewpager2_fragments/Activity2_1ViewPagerFragmentAdapter.kt

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Original file line numberDiff line numberDiff line change
@@ -87,14 +87,7 @@ class Activity2_1ViewPagerFragmentAdapter : AppCompatActivity() {
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// position: Int,
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// positionOffset: Float,
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// positionOffsetPixels: Int
90-
// ) {
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// println(
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// "🤪 ViewPager2.OnPageChangeCallback() onPageScrolled() position: $position, " +
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// "positionOffset: $positionOffset, " +
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// "positionOffsetPixels: $positionOffsetPixels"
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// )
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//
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// }
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// ) {}
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//
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// override fun onPageScrollStateChanged(state: Int) {}
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‎Tutorial0-MaterialDesign/src/main/java/com/smarttoolfactory/tutorial0_materialdesign/chapter2_1viewpager2_fragments/Activity2_3ViewPagerInsideFragment.kt

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Original file line numberDiff line numberDiff line change
@@ -31,7 +31,7 @@ class Activity2_3ViewPagerInsideFragment : AppCompatActivity() {
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setSupportActionBar(dataBinding.toolbar)
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34-
createFragment()
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createRootFragment()
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/*
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Add a back stack listener to check number of fragments to display top back button
@@ -56,7 +56,10 @@ class Activity2_3ViewPagerInsideFragment : AppCompatActivity() {
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}
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}
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59-
private fun createFragment() {
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/**
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* Create root fragment for this Activity
61+
*/
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private fun createRootFragment() {
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// ✅ Replace Fragment with Java Style
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// supportFragmentManager.beginTransaction()

‎Tutorial0-MaterialDesign/src/main/java/com/smarttoolfactory/tutorial0_materialdesign/chapter2_1viewpager2_fragments/Activity2_4ViewPagerFragmentState.kt

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package com.smarttoolfactory.tutorial0_materialdesign.chapter2_1viewpager2_fragments
2+
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import android.os.Bundle
4+
import android.widget.Toast
5+
import androidx.appcompat.app.AppCompatActivity
6+
import androidx.databinding.DataBindingUtil
7+
import androidx.fragment.app.commit
8+
import androidx.fragment.app.replace
9+
import com.smarttoolfactory.tutorial0_materialdesign.R
10+
import com.smarttoolfactory.tutorial0_materialdesign.blankfragment.FragmentThatContainsViewPager
11+
import com.smarttoolfactory.tutorial0_materialdesign.databinding.Activity23viewpagerInFragmentBinding
12+
import com.smarttoolfactory.tutorial0_materialdesign.fragment_factory.GenericFragmentFactory
13+
14+
class Activity2_4ViewPagerFragmentState : AppCompatActivity() {
15+
16+
lateinit var dataBinding: Activity23viewpagerInFragmentBinding
17+
18+
override fun onCreate(savedInstanceState: Bundle?) {
19+
20+
/*
21+
⚠️ FragmentFactory should be placed before super.onCreate to be able
22+
find non-empty constructors of fragments
23+
*/
24+
supportFragmentManager.fragmentFactory = GenericFragmentFactory.getFragmentFactory()
25+
26+
super.onCreate(savedInstanceState)
27+
dataBinding =
28+
DataBindingUtil.setContentView(this, R.layout.activity2_3viewpager_in_fragment)
29+
30+
dataBinding.toolbar.title = "ViewPager Inside Fragment"
31+
32+
setSupportActionBar(dataBinding.toolbar)
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34+
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/*
36+
Add a back stack listener to check number of fragments to display top back button
37+
*/
38+
supportFragmentManager.addOnBackStackChangedListener {
39+
40+
val fragmentOnTop = supportFragmentManager.findFragmentById(
41+
R.id.fragment_container_view
42+
)
43+
44+
val fragmentCount = supportFragmentManager.backStackEntryCount
45+
46+
Toast.makeText(
47+
this@Activity2_4ViewPagerFragmentState,
48+
// Check fragment count and fragment on top of the stack for fragment_container_view
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"Activity fragmentCount: $fragmentCount, current Frag: $fragmentOnTop",
50+
Toast.LENGTH_SHORT
51+
).show()
52+
53+
supportActionBar?.setDisplayHomeAsUpEnabled(fragmentCount > 0)
54+
55+
}
56+
}
57+
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/**
59+
* Create root fragment for this Activity
60+
*/
61+
private fun createRootFragment() {
62+
63+
// ✅ Replace Fragment with DSL style
64+
supportFragmentManager.commit {
65+
replace<FragmentThatContainsViewPager>(R.id.fragment_container_view)
66+
}
67+
}
68+
69+
override fun onSupportNavigateUp(): Boolean {
70+
supportFragmentManager.popBackStack()
71+
return true
72+
}
73+
74+
}

‎Tutorial0-MaterialDesign/src/main/java/com/smarttoolfactory/tutorial0_materialdesign/chapter2_1viewpager2_fragments/Activity2_5ViewPagerChildFragments.kt

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,86 @@
1+
package com.smarttoolfactory.tutorial0_materialdesign.chapter2_1viewpager2_fragments
2+
3+
import android.os.Bundle
4+
import android.widget.Toast
5+
import androidx.appcompat.app.AppCompatActivity
6+
import androidx.databinding.DataBindingUtil
7+
import androidx.fragment.app.commit
8+
import androidx.fragment.app.replace
9+
import com.smarttoolfactory.tutorial0_materialdesign.R
10+
import com.smarttoolfactory.tutorial0_materialdesign.blankfragment.FragmentThatContainsViewPager
11+
import com.smarttoolfactory.tutorial0_materialdesign.databinding.Activity23viewpagerInFragmentBinding
12+
import com.smarttoolfactory.tutorial0_materialdesign.fragment_factory.GenericFragmentFactory
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14+
class Activity2_5ViewPagerChildFragments : AppCompatActivity() {
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16+
lateinit var dataBinding: Activity23viewpagerInFragmentBinding
17+
18+
override fun onCreate(savedInstanceState: Bundle?) {
19+
20+
/*
21+
⚠️ FragmentFactory should be placed before super.onCreate to be able
22+
find non-empty constructors of fragments
23+
*/
24+
supportFragmentManager.fragmentFactory = GenericFragmentFactory.getFragmentFactory()
25+
26+
super.onCreate(savedInstanceState)
27+
dataBinding =
28+
DataBindingUtil.setContentView(this, R.layout.activity2_3viewpager_in_fragment)
29+
30+
dataBinding.toolbar.title = "ViewPager Inside Fragment"
31+
32+
setSupportActionBar(dataBinding.toolbar)
33+
34+
createRootFragment()
35+
36+
/*
37+
Add a back stack listener to check number of fragments to display top back button
38+
*/
39+
supportFragmentManager.addOnBackStackChangedListener {
40+
41+
val fragmentOnTop = supportFragmentManager.findFragmentById(
42+
R.id.fragment_container_view
43+
)
44+
45+
val fragmentCount = supportFragmentManager.backStackEntryCount
46+
47+
Toast.makeText(
48+
this@Activity2_5ViewPagerChildFragments,
49+
// Check fragment count and fragment on top of the stack for fragment_container_view
50+
"Activity fragmentCount: $fragmentCount, current Frag: $fragmentOnTop",
51+
Toast.LENGTH_SHORT
52+
).show()
53+
54+
supportActionBar?.setDisplayHomeAsUpEnabled(fragmentCount > 0)
55+
56+
}
57+
}
58+
59+
/**
60+
* Create root fragment for this Activity
61+
*/
62+
private fun createRootFragment() {
63+
64+
// ✅ Replace Fragment with Java Style
65+
// supportFragmentManager.beginTransaction()
66+
// .replace(
67+
// R.id.fragment_container_view,
68+
// FragmentThatContainsViewPager::class.java,
69+
// Bundle()
70+
// )
71+
// .commit()
72+
73+
// ✅ Replace Fragment with DSL style
74+
supportFragmentManager.commit {
75+
replace<FragmentThatContainsViewPager>(R.id.fragment_container_view)
76+
// Using addToBackStack makes backStackEntryCount 1
77+
// .addToBackStack(null)
78+
}
79+
}
80+
81+
override fun onSupportNavigateUp(): Boolean {
82+
supportFragmentManager.popBackStack()
83+
return true
84+
}
85+
86+
}

‎Tutorial1-1Navigation-NavGraph/build.gradle

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@@ -1,11 +1,11 @@
11
apply plugin: 'com.android.application'
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apply plugin: 'kotlin-android'
3+
apply plugin: 'kotlin-kapt'
34
apply plugin: 'kotlin-android-extensions'
45

56
android {
67
compileSdkVersion rootProject.compileSdkVersion
78
defaultConfig {
8-
applicationId "com.smarttoolfactory.navigationworkmanagerpagination"
99
minSdkVersion rootProject.minSdkVersion
1010
targetSdkVersion rootProject.targetSdkVersion
1111
versionCode 1

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