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

 package com.base.browserwhite.ui.activity.cleanjunk
 
 import android.graphics.Color
+import android.os.Environment
+import android.view.View
 import androidx.activity.addCallback
 import androidx.lifecycle.lifecycleScope
 import com.base.browserwhite.R
@@ -9,9 +11,17 @@ import com.base.browserwhite.databinding.ActivityScanJunkBinding
 import com.base.browserwhite.ui.activity.BaseActivity
 import com.base.browserwhite.ui.adapter.JunkScanAdapter
 import com.base.browserwhite.utils.BarUtils
+import com.base.browserwhite.utils.FileHelp.getFileFolder
+import com.base.browserwhite.utils.KotlinExt.toFormatSize
+import com.base.browserwhite.utils.MediaStoreUtils.queryFiles
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.channels.BufferOverflow
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.launch
+import java.io.File
 
 class ScanJunkActivity : BaseActivity<ActivityScanJunkBinding>() {
 
@@ -20,6 +30,12 @@ class ScanJunkActivity : BaseActivity<ActivityScanJunkBinding>() {
     override val binding: ActivityScanJunkBinding by lazy {
         ActivityScanJunkBinding.inflate(layoutInflater)
     }
+    private val mPathFlow = MutableSharedFlow<String>(
+        replay = 5,//当新的订阅者Collect时，发送几个已经发送过的数据给它
+        extraBufferCapacity = 5,//减去replay，MutableSharedFlow还缓存多少数据,缓冲池容量 = replay + extraBufferCapacity
+        onBufferOverflow = BufferOverflow.DROP_OLDEST//缓存策略，三种 丢掉最新值、丢掉最旧值和挂起
+    )
+    val pathFlow: SharedFlow<String> = mPathFlow
 
     override fun initView() {
         BarUtils.setStatusBarLightMode(this, true)
@@ -30,6 +46,12 @@ class ScanJunkActivity : BaseActivity<ActivityScanJunkBinding>() {
         junkScanAdapter = JunkScanAdapter()
         binding.rv.adapter = junkScanAdapter
 
+
+        lifecycleScope.launch(Dispatchers.Main) {
+            pathFlow.collectLatest {
+                binding.tvPath.text = it
+            }
+        }
         beginScan()
     }
 
@@ -45,19 +67,55 @@ class ScanJunkActivity : BaseActivity<ActivityScanJunkBinding>() {
 
     }
 
-    private fun beginScan() {
-        lifecycleScope.launch(Dispatchers.Main) {
-            junkScanAdapter.addData(ParentBean(R.mipmap.x_residual, "Residual File"), 0)
-            delay(300)
-            junkScanAdapter.addData(ParentBean(R.mipmap.x_useless, "Useless installation package"), 1)
-            delay(300)
-            junkScanAdapter.addData(ParentBean(R.mipmap.x_temp, "Temp Files"), 2)
-            delay(300)
-            junkScanAdapter.addData(ParentBean(R.mipmap.x_residual, "Log Files"), 3)
-
+    private fun beginScan() = lifecycleScope.launch(Dispatchers.Main) {
+        var size = 0L
+        junkScanAdapter.addData(ParentBean(R.mipmap.x_residual, "Residual File"), 0)
+        delay(300)
+        junkScanAdapter.addData(ParentBean(R.mipmap.x_useless, "Useless installation package"), 1)
+        delay(300)
+        junkScanAdapter.addData(ParentBean(R.mipmap.x_temp, "Temp Files"), 2)
+        delay(300)
+        junkScanAdapter.addData(ParentBean(R.mipmap.x_residual, "Log Files"), 3)
+
+        val emptyFolder = arrayListOf<File>()
+        arrayOf(
+            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM),
+            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS),
+            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS),
+            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
+            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES),
+            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC),
+        ).forEach { dir ->
+            val list = getFileFolder(mPathFlow, dir, filter = { it.listFiles().isNullOrEmpty() }).await()
+            emptyFolder.addAll(list)
         }
+        size = emptyFolder.sumOf { it.length() }
+        setSize(size)
+        junkScanAdapter.setFinishScan(0)
+
+        val apkList = queryFiles(this@ScanJunkActivity, ".apk", mPathFlow).await()
+        size += apkList.sumOf { it.length() }
+        setSize(size)
+        junkScanAdapter.setFinishScan(1)
+
+        val tempList = queryFiles(this@ScanJunkActivity, ".temp", mPathFlow).await()
+        size += tempList.sumOf { it.length() }
+        setSize(size)
+        junkScanAdapter.setFinishScan(2)
+
+        val logList = queryFiles(this@ScanJunkActivity, ".log", mPathFlow).await()
+        size += logList.sumOf { it.length() }
+        setSize(size)
+        junkScanAdapter.setFinishScan(3)
+
+        binding.tvPath.visibility = View.GONE
+        binding.tvBtn.isEnabled=true
+    }
 
-
+    private fun setSize(size: Long) {
+        val split = size.toFormatSize().split(" ")
+        binding.tvSize.text = split[0]
+        binding.tvUnit.text = split[1]
     }
 
 

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

@@ -64,5 +64,11 @@ class JunkScanAdapter : RecyclerView.Adapter<JunkScanAdapter.ParentViewHolder>()
         notifyItemChanged(position)
     }
 
+    fun setFinishScan(position: Int) {
+        val bean = beanList[position]
+        bean.finished = true
+        notifyItemChanged(position)
+    }
+
 
 }
\ No newline at end of file

app/src/main/java/com/base/browserwhite/utils/FileHelp.kt

+package com.base.browserwhite.utils
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.flow.MutableSharedFlow
+import java.io.File
+import java.util.LinkedList
+
+object FileHelp {
+    fun CoroutineScope.getFileFolder(
+        flow: MutableSharedFlow<String>,
+        file: File,
+        filter: (file: File) -> Boolean
+    ) = async(Dispatchers.IO) {
+
+        val set = HashSet<File>()
+        //添加第一层文件到链表
+        val linkList = LinkedList<File>()
+        val fileList = file.listFiles()
+        fileList?.forEach {
+            if (it.isDirectory) {
+                flow.emit(it.absolutePath)
+                linkList.add(it)
+                if (filter.invoke(it)) {
+                    set.add(it)
+                }
+            }
+        }
+
+        //链表取文件
+        var tempFile: File
+        while (!linkList.isEmpty()) {
+            tempFile = linkList.removeFirst()
+            val tempFileList = tempFile.listFiles()
+            tempFileList?.forEach {
+                if (it.isDirectory) {
+                    flow.emit(it.absolutePath)
+                    linkList.add(it)
+                    if (filter.invoke(it)) {
+                        set.add(it)
+                    }
+                }
+            }
+        }
+        set.toList()
+    }
+}
\ No newline at end of file

app/src/main/java/com/base/browserwhite/utils/MediaStoreUtils.kt

@@ -3,6 +3,7 @@ package com.base.browserwhite.utils
 import android.content.Context
 import android.database.Cursor
 import android.net.Uri
+import android.os.Build
 import android.provider.MediaStore
 import com.base.browserwhite.bean.ConstObject.MIME_TYPE_APK
 import com.base.browserwhite.bean.ConstObject.MIME_TYPE_AUDIO
@@ -17,6 +18,12 @@ import com.base.browserwhite.bean.ConstObject.MIME_TYPE_XLS
 import com.base.browserwhite.bean.ConstObject.MIME_TYPE_XLSX
 import com.base.browserwhite.bean.ConstObject.MIME_TYPE_ZIP
 import com.base.browserwhite.bean.MediaBean
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableSharedFlow
+import java.io.File
 
 
 object MediaStoreUtils {
@@ -351,4 +358,37 @@ object MediaStoreUtils {
         }
         return count
     }
+
+    private fun getFileTypeSelection(fileSuffix: String): String {
+        return (MediaStore.Files.FileColumns.MEDIA_TYPE + "="
+                + MediaStore.Files.FileColumns.MEDIA_TYPE_NONE + " AND "
+                + MediaStore.Files.FileColumns.DATA + " LIKE '%" + fileSuffix + "'")
+    }
+
+
+    fun CoroutineScope.queryFiles(context: Context, fileSuffix: String, flow: MutableSharedFlow<String>? = null) =
+        async(Dispatchers.IO) {
+            val selection = getFileTypeSelection(fileSuffix)
+            val fileList: MutableList<File> = ArrayList()
+            val projection = arrayOf(
+                MediaStore.Files.FileColumns._ID, MediaStore.Files.FileColumns.DATA,
+            )
+            val sortOrder = MediaStore.Files.FileColumns._ID + " DESC"
+            val queryUri = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                MediaStore.Files.getContentUri(MediaStore.VOLUME_EXTERNAL)
+            } else {
+                MediaStore.Files.getContentUri("external")
+            }
+            val cursor = context.contentResolver.query(queryUri, projection, selection, null, sortOrder)
+            if (cursor != null) {
+                while (cursor.moveToNext()) {
+                    delay(150)
+                    val path = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns.DATA))
+                    flow?.emit(path)
+                    fileList.add(File(path))
+                }
+                cursor.close()
+            }
+            fileList
+        }
 }
\ No newline at end of file

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

+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item android:drawable="@drawable/bg_0571ed_25" android:state_enabled="true" />
+    <item android:drawable="@drawable/bg_f3f4f6_25" android:state_enabled="false" />
+</selector>
\ No newline at end of file

app/src/main/res/drawable/bg_f3f4f6_25.xml

+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="#F3F4F6" />
+    <corners android:radius="25dp" />
+</shape>
\ No newline at end of file

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

@@ -82,8 +82,10 @@
             android:layout_width="match_parent"
             android:layout_height="35dp"
             android:background="#1A000000"
+            android:ellipsize="middle"
             android:gravity="center_vertical"
-            android:paddingStart="15dp"
+            android:paddingHorizontal="15dp"
+            android:singleLine="true"
             android:textColor="@color/white"
             android:textSize="12sp"
             app:layout_constraintBottom_toBottomOf="parent"
@@ -111,8 +113,16 @@
         android:layout_width="338dp"
         android:layout_height="50dp"
         android:layout_marginBottom="30dp"
+        android:background="@drawable/bg_clean_btn"
+        android:enabled="false"
+        android:gravity="center"
+        android:text="Scan in progress"
+        android:textSize="18sp"
+        android:textStyle="bold"
+        android:textColor="#AEAEB0"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent" />
+        app:layout_constraintStart_toStartOf="parent"
+        tools:ignore="HardcodedText" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file