Expandable ReyclerView module

expandable-recyclerview/src/androidTest/java/com/github/adriankuta/expandable_recyclerview/ExampleInstrumentedTest.kt

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+package com.github.adriankuta.expandable_recyclerview
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.github.adriankuta.expandable_recyclerview.test", appContext.packageName)
+    }
+}

expandable-recyclerview/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.github.adriankuta.expandable_recyclerview" />

expandable-recyclerview/src/main/java/com/github/adriankuta/expandable_recyclerview/ExpandableGroup.kt

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+package com.github.adriankuta.expandable_recyclerview
+
+import com.github.adriankuta.datastructure.tree.TreeNode
+
+open class ExpandableGroup<T>(value: T) : TreeNode<T>(value) {
+
+    private var _isExpanded = false
+    val isExpanded: Boolean
+        get() = _isExpanded
+
+
+    open fun expand() {
+        _isExpanded = true
+    }
+
+    open fun collapse() {
+        _isExpanded = false
+    }
+}

expandable-recyclerview/src/main/java/com/github/adriankuta/expandable_recyclerview/ExpandableRecyclerView.kt

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+package com.github.adriankuta.expandable_recyclerview
+
+import android.content.Context
+import android.util.AttributeSet
+import androidx.recyclerview.widget.RecyclerView
+
+class ExpandableRecyclerView @JvmOverloads constructor(
+    context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
+) : RecyclerView(context, attrs, defStyleAttr) {
+
+
+}

expandable-recyclerview/src/main/java/com/github/adriankuta/expandable_recyclerview/MultilevelRecyclerViewAdapter.kt

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+package com.github.adriankuta.expandable_recyclerview
+
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+
+abstract class MultilevelRecyclerViewAdapter<T, VH: RecyclerView.ViewHolder>: RecyclerView.Adapter<VH>() {
+
+    abstract fun getExpandableGroups(): ExpandableGroup<T>
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): VH {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun getItemCount(): Int {
+        getExpandableGroups().toList()
+        return getExpandableGroups().nodeCount()
+    }
+
+    override fun onBindViewHolder(holder: VH, position: Int) {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun getItemViewType(position: Int): Int {
+        return super.getItemViewType(position)
+    }
+}

expandable-recyclerview/src/main/java/com/github/adriankuta/expandable_recyclerview/Temp.java

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+package com.github.adriankuta.expandable_recyclerview;
+
+public class Temp {
+
+    public static void main(String[] args) {
+        ExpandableGroup<String> group = new ExpandableGroup<>("");
+
+    }
+}

expandable-recyclerview/src/main/res/values/strings.xml

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+<resources>
+    <string name="app_name">Expandable RecyclerView</string>
+</resources>

expandable-recyclerview/src/test/java/com/github/adriankuta/expandable_recyclerview/ExampleUnitTest.kt

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+package com.github.adriankuta.expandable_recyclerview
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}