feat: implement edge-to-edge support

- Update layout to use CoordinatorLayout and ConstraintLayout- Add toolbar and implement proper window insets handling
- Enable edge-to-edge support for immersive UI experience
- Refactor MainActivity to use new UI components
- Update themes to use NoActionBar parent for consistency

app/src/main/kotlin/com/dingyi/treeview/MainActivity.kt

@@ -16,6 +16,10 @@ import androidx.core.view.isVisible
 import androidx.core.view.updateLayoutParams
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.updatePadding
+import androidx.activity.enableEdgeToEdge
 import com.dingyi.treeview.databinding.ActivityMainBinding
 import com.dingyi.treeview.databinding.ItemDirBinding
 import com.dingyi.treeview.databinding.ItemFileBinding
@@ -48,10 +52,19 @@ class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        binding = ActivityMainBinding.inflate(layoutInflater)
+        enableEdgeToEdge()
 
+        binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
+        setSupportActionBar(binding.toolbar)
+
+        ViewCompat.setOnApplyWindowInsetsListener(binding.treeview) { view, windowInsets ->
+            val insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars())
+            view.updatePadding(bottom = insets.bottom)
+            windowInsets
+        }
+
         val tree = createTree()
         this.tree = tree
 
@@ -79,22 +92,23 @@ class MainActivity : AppCompatActivity() {
     }
 
     override fun onPrepareOptionsMenu(menu: Menu): Boolean {
+        println("prepare menu $menu")
         menu.findItem(R.id.drag_node).apply {
             isChecked = binding.treeview.supportDragging
             isEnabled =
-                binding.treeview.selectionMode != TreeView.SelectionMode.MULTIPLE_WITH_CHILDREN
+                binding.treeview.selectionMode != TreeView.SelectionMode.NONE
         }
         menu.findItem(R.id.select_mode).apply {
             isChecked =
-                binding.treeview.selectionMode == TreeView.SelectionMode.MULTIPLE_WITH_CHILDREN
+                binding.treeview.selectionMode != TreeView.SelectionMode.NONE
             isEnabled = !binding.treeview.supportDragging
         }
         menu.findItem(R.id.slow_mode).apply {
             isChecked = isSlow
         }
         menu.findItem(R.id.selected_group).apply {
             isEnabled =
-                binding.treeview.selectionMode == TreeView.SelectionMode.MULTIPLE_WITH_CHILDREN
+                binding.treeview.selectionMode != TreeView.SelectionMode.NONE
         }
         return super.onPrepareOptionsMenu(menu)
     }
@@ -306,7 +320,7 @@ class MainActivity : AppCompatActivity() {
 
             applyDepth(holder, node)
 
-            (getCheckableView(node, holder) as MaterialCheckBox).apply {
+            getCheckableView(node, holder).apply {
                 isVisible = node.selected
                 isSelected = node.selected
             }
@@ -342,7 +356,7 @@ class MainActivity : AppCompatActivity() {
         override fun getCheckableView(
             node: TreeNode<DataSource<String>>,
             holder: TreeView.ViewHolder
-        ): Checkable {
+        ): MaterialCheckBox {
             return if (node.isChild) {
                 ItemDirBinding.bind(holder.itemView).checkbox
             } else {
@@ -351,11 +365,7 @@ class MainActivity : AppCompatActivity() {
         }
 
         override fun onClick(node: TreeNode<DataSource<String>>, holder: TreeView.ViewHolder) {
-            if (node.isChild) {
-                applyDir(holder, node)
-            } else {
-                Toast.makeText(this@MainActivity, "Clicked ${node.name}", Toast.LENGTH_LONG).show()
-            }
+            Toast.makeText(this@MainActivity, "Clicked ${node.name}", Toast.LENGTH_LONG).show()
         }
 
         override fun onMoveView(

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

@@ -1,24 +1,48 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout 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:orientation="vertical"
-    android:animateLayoutChanges="true"
+    android:fitsSystemWindows="true"
     tools:context=".MainActivity">
 
-    <ProgressBar
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/appBarLayout"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:id="@+id/progress"
-        style="@style/Widget.AppCompat.ProgressBar.Horizontal"
-        android:indeterminate="true" />
+        android:fitsSystemWindows="true">
 
-    <io.github.dingyi222666.view.treeview.TreeView
+        <com.google.android.material.appbar.MaterialToolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:layout_scrollFlags="scroll|enterAlways|snap" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:id="@+id/treeview"
-      />
+        android:animateLayoutChanges="true"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+        <ProgressBar
+            android:id="@+id/progress"
+            style="@style/Widget.AppCompat.ProgressBar.Horizontal"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:indeterminate="true"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <io.github.dingyi222666.view.treeview.TreeView
+            android:id="@+id/treeview"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:clipToPadding="false"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/progress" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
 
-</LinearLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -1,6 +1,6 @@
 <resources xmlns:tools="http://schemas.android.com/tools">
     <!-- Base application theme. -->
-    <style name="Theme.TreeView" parent="Theme.Material3.DynamicColors.Light">
+    <style name="Theme.TreeView" parent="Theme.Material3.DynamicColors.Light.NoActionBar">
         <!-- Primary brand color. -->
       <!--  <item name="colorPrimary">@color/purple_500</item>
         <item name="colorPrimaryVariant">@color/purple_700</item>