...

app/src/main/java/com/base/browserwhite/ui/activity/cleanjunk/ScanJunkActivity.kt

@@ -45,6 +45,7 @@ class ScanJunkActivity : BaseActivity<ActivityScanJunkBinding>() {
     )
     val pathFlow: SharedFlow<String> = mPathFlow
 
+    @SuppressLint("SetTextI18n")
     override fun initView() {
         BarUtils.setStatusBarLightMode(this, true)
         BarUtils.setStatusBarColor(this, Color.TRANSPARENT)
@@ -54,7 +55,13 @@ class ScanJunkActivity : BaseActivity<ActivityScanJunkBinding>() {
         junkScanAdapter = JunkScanAdapter()
         binding.rv.adapter = junkScanAdapter
 
-        junkExpandAdapter = JunkExpandAdapter()
+        junkExpandAdapter = JunkExpandAdapter { size ->
+            if (size > 0) {
+                binding.tvBtn.text = "Clean up ${size.toFormatSize()}"
+            } else {
+                binding.tvBtn.text = "Got it"
+            }
+        }
         binding.rvEx.adapter = junkExpandAdapter
 
         lifecycleScope.launch(Dispatchers.Main) {

app/src/main/java/com/base/browserwhite/ui/adapter/JunkExpandAdapter.kt

@@ -12,7 +12,7 @@ import com.base.browserwhite.utils.XmlEx.inflate
 import pokercc.android.expandablerecyclerview.ExpandableAdapter
 import java.io.File
 
-class JunkExpandAdapter : ExpandableAdapter<ExpandableAdapter.ViewHolder>() {
+class JunkExpandAdapter(private val selectAction: (size: Long) -> Unit) : ExpandableAdapter<ExpandableAdapter.ViewHolder>() {
 
     private val beanList = arrayListOf<ParentBean>()
     override fun getChildCount(groupPosition: Int): Int {
@@ -50,6 +50,7 @@ class JunkExpandAdapter : ExpandableAdapter<ExpandableAdapter.ViewHolder>() {
                     parentBean.isSelect = allSelect
                     notifyGroupChange(groupPosition, "aa")
                 }
+                selectChange()
             }
 
             if (childBean.playAnimation) {
@@ -93,6 +94,7 @@ class JunkExpandAdapter : ExpandableAdapter<ExpandableAdapter.ViewHolder>() {
                 bean.isSelect = !bean.isSelect
                 bean.childItem.forEach { it.isSelect = bean.isSelect }
                 notifyDataSetChanged()
+                selectChange()
             }
             if (bean.playAnimation) {
                 val slideInFromRight = AnimationUtils.loadAnimation(holder.itemView.context, R.anim.slide_in_from_right)
@@ -116,4 +118,9 @@ class JunkExpandAdapter : ExpandableAdapter<ExpandableAdapter.ViewHolder>() {
         notifyDataSetChanged()
     }
 
+    private fun selectChange() {
+        val size = beanList.flatMap { it.childItem }.filter { it.isSelect }.sumOf { bean -> File(bean.path).length() }
+        selectAction.invoke(size)
+    }
+
 }