文件遍历方式获取文件

app/src/main/java/com/base/superpdfreader/MainActivity.kt

@@ -2,7 +2,6 @@ package com.base.superpdfreader
 
 import android.annotation.SuppressLint
 import android.graphics.Color
-import android.util.Log
 import androidx.core.content.ContextCompat
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentActivity
@@ -11,7 +10,7 @@ import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
 import com.base.superpdfreader.databinding.ActivityMainBinding
 import com.base.superpdfreader.databinding.ItemTabBinding
 import com.base.superpdfreader.fragment.DocumentListFragment
-import com.base.superpdfreader.fragment.DocumentListFragment.Companion.MODE_DPF
+import com.base.superpdfreader.fragment.DocumentListFragment.Companion.MODE_PDF
 import com.base.superpdfreader.fragment.DocumentListFragment.Companion.MODE_EXCEL
 import com.base.superpdfreader.fragment.DocumentListFragment.Companion.MODE_PPT
 import com.base.superpdfreader.fragment.DocumentListFragment.Companion.MODE_WORD
@@ -30,7 +29,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
     private val pages = arrayListOf<DocumentListFragment>()
 
     private val pdfFragment by lazy {
-        DocumentListFragment().apply { UI_MODE = MODE_DPF }
+        DocumentListFragment().apply { UI_MODE = MODE_PDF }
     }
     private val wordFragment by lazy {
         DocumentListFragment().apply { UI_MODE = MODE_WORD }

app/src/main/java/com/base/superpdfreader/adapter/DocumentAdapter.kt

@@ -10,12 +10,10 @@ import com.base.superpdfreader.bean.DocumentBean
 import com.base.superpdfreader.databinding.ItemDocumentBinding
 import com.base.superpdfreader.view.XmlEx.inflate
 import java.io.File
-import java.nio.file.Files
-import java.nio.file.attribute.FileTime
 
-class DocumentAdapter(val itemClick: (bean: DocumentBean) -> Unit) : RecyclerView.Adapter<DocumentAdapter.DDD>() {
+class DocumentAdapter(val itemClick: (bean: DocumentBean) -> Unit) :
+    RecyclerView.Adapter<DocumentAdapter.DDD>() {
 
-    private val hasData = HashSet<File>()
     private val docList = ArrayList<DocumentBean>()
 
     class DDD(view: View) : ViewHolder(view)
@@ -43,19 +41,17 @@ class DocumentAdapter(val itemClick: (bean: DocumentBean) -> Unit) : RecyclerVie
     @SuppressLint("NotifyDataSetChanged")
     fun addData(type: String, drawable: Int, list: List<File>) {
 
-        list.forEach { file ->
-            val flag = hasData.add(file)
-            if (flag) {
-                val bean = DocumentBean(
-                    drawable,
-                    file.name,
-                    file.lastModified(),
-                    file.length(),
-                    file.absolutePath, type
-                )
-                docList.add(bean)
-            }
+        val beans = list.map { file ->
+            val bean = DocumentBean(
+                drawable,
+                file.name,
+                file.lastModified(),
+                file.length(),
+                file.absolutePath, type
+            )
+            bean
         }
+        docList.addAll(beans)
         notifyDataSetChanged()
     }
 

app/src/main/java/com/base/superpdfreader/fragment/DocumentListFragment.kt

@@ -9,16 +9,18 @@ import com.base.superpdfreader.adapter.DocumentAdapter
 import com.base.superpdfreader.databinding.FragmentDocumentListBinding
 import com.base.superpdfreader.helps.BaseFragment
 import com.base.superpdfreader.helps.FileHelp.loadDocument
+import com.base.superpdfreader.helps.LogEx
 import com.base.superpdfreader.helps.PermissionHelp.checkStorePermission
 import com.base.superpdfreader.helps.PermissionHelp.requestStorePermission
 import com.base.superpdfreader.view.DocumentDetailDialog.showDocumentDetailDialog
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.async
 import kotlinx.coroutines.launch
 
 class DocumentListFragment() : BaseFragment<FragmentDocumentListBinding>() {
 
-    var UI_MODE: String = MODE_DPF
+    private val TAG = "DocumentListFragment"
+
+    var UI_MODE: String = MODE_PDF
     private lateinit var adapter: DocumentAdapter
 
     public override val binding: FragmentDocumentListBinding by lazy {
@@ -28,20 +30,24 @@ class DocumentListFragment() : BaseFragment<FragmentDocumentListBinding>() {
 
     override fun setView() {
         when (UI_MODE) {
-            MODE_DPF -> {
-                binding.tvAllow.background = ContextCompat.getDrawable(requireContext(), R.drawable.bg_allow_pdf)
+            MODE_PDF -> {
+                binding.tvAllow.background =
+                    ContextCompat.getDrawable(requireContext(), R.drawable.bg_allow_pdf)
             }
 
             MODE_WORD -> {
-                binding.tvAllow.background = ContextCompat.getDrawable(requireContext(), R.drawable.bg_allow_word)
+                binding.tvAllow.background =
+                    ContextCompat.getDrawable(requireContext(), R.drawable.bg_allow_word)
             }
 
             MODE_PPT -> {
-                binding.tvAllow.background = ContextCompat.getDrawable(requireContext(), R.drawable.bg_allow_ppt)
+                binding.tvAllow.background =
+                    ContextCompat.getDrawable(requireContext(), R.drawable.bg_allow_ppt)
             }
 
             MODE_EXCEL -> {
-                binding.tvAllow.background = ContextCompat.getDrawable(requireContext(), R.drawable.bg_allow_excel)
+                binding.tvAllow.background =
+                    ContextCompat.getDrawable(requireContext(), R.drawable.bg_allow_excel)
             }
         }
         adapter = DocumentAdapter { bean ->
@@ -72,13 +78,15 @@ class DocumentListFragment() : BaseFragment<FragmentDocumentListBinding>() {
 
     private fun initData() = lifecycleScope.launch(Dispatchers.IO) {
         when (UI_MODE) {
-            MODE_DPF -> {
+            MODE_PDF -> {
                 loadDocument(filter = {
-                    it.path.contains(".pdf")
+                    val fileType = it.path.substring(it.path.length - 4, it.path.length)
+                    val flag = fileType == ".pdf"
+                    LogEx.logDebug(TAG, "fileType=$fileType flag=$flag")
+                    flag
                 }) { files ->
-
                     launch(Dispatchers.Main) {
-                        adapter.addData(MODE_DPF, R.mipmap.pdf, files)
+                        adapter.addData(MODE_PDF, R.mipmap.pdf, files)
                     }
                 }
             }
@@ -95,6 +103,7 @@ class DocumentListFragment() : BaseFragment<FragmentDocumentListBinding>() {
 
             MODE_PPT -> {
                 loadDocument(filter = {
+
                     it.path.contains(".ppt")
                 }) { files ->
                     launch(Dispatchers.Main) {
@@ -121,7 +130,7 @@ class DocumentListFragment() : BaseFragment<FragmentDocumentListBinding>() {
     }
 
     companion object {
-        const val MODE_DPF = "PDF"
+        const val MODE_PDF = "PDF"
         const val MODE_WORD = "WORD"
         const val MODE_PPT = "PPT"
         const val MODE_EXCEL = "EXCEL"

app/src/main/java/com/base/superpdfreader/helps/FileHelp.kt

 package com.base.superpdfreader.helps
 
 import android.os.Environment
+import android.provider.MediaStore
 import android.util.Log
 import androidx.lifecycle.LifecycleCoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -15,33 +16,28 @@ object FileHelp {
         filter: (file: File) -> Boolean,
         eachFile: (eachFiles: List<File>) -> Unit
     ) {
-        var firstSend = true
+
         val resultList = arrayListOf<File>()
 
         val root = Environment.getExternalStorageDirectory()
         loadFileByFilter(root, filter = filter, onDo = {
-            Log.e(TAG, "file=$it")
 
-            if (firstSend) {
-                //第一次发送
-                firstSend = false
-                eachFile.invoke(listOf(it))
+            if (resultList.size == 5) {
+                val mainList = arrayListOf<File>()
+                mainList.addAll(resultList)
+                resultList.clear()
+                Log.e(TAG, "size=${mainList.size}")
+                //这里onDo切换到main主协程,避免IO协程里的数据和main协程里的数据共用同一对象
+                eachFile.invoke(mainList)
+
             } else {
-                //间隔发送
                 resultList.add(it)
-                if (resultList.size == 5) {
-                    val mainList = arrayListOf<File>()
-                    mainList.addAll(mainList)
-                    //这里onDo切换到main主协程,避免IO协程里的数据和main协程里的数据共用同一对象
-                    eachFile.invoke(mainList)
-                    resultList.clear()
-                }
             }
         })
         eachFile.invoke(resultList)
     }
 
-    fun loadFileByFilter(
+    private fun loadFileByFilter(
         folder: File,
         filter: (file: File) -> Boolean,
         onDo: ((file: File) -> Unit)?
@@ -54,7 +50,11 @@ object FileHelp {
             if (it.isDirectory) {
                 linkList.add(it)
             } else {
-                onDo?.invoke(it)
+                val flag = filter(it)
+                LogEx.logDebug(TAG, "$it flag=$flag")
+                if (flag) {
+                    onDo?.invoke(it)
+                }
             }
         }
 
@@ -67,7 +67,9 @@ object FileHelp {
                 if (it.isDirectory) {
                     linkList.add(it)
                 } else {
-                    if (filter(it)) {
+                    val flag = filter(it)
+                    LogEx.logDebug(TAG, "$it flag=$flag")
+                    if (flag) {
                         onDo?.invoke(it)
                     }
                 }

app/src/main/java/com/base/superpdfreader/helps/MediaStoreHelp.kt

+package com.base.superpdfreader.helps
+
+object MediaStoreHelp {
+}
\ No newline at end of file

app/src/main/java/com/base/superpdfreader/view/DocumentDetailDialog.kt

@@ -27,7 +27,7 @@ object DocumentDetailDialog {
         binding.tvName.text = bean.name
         binding.tvInfo.text = "Last modified: ${bean.info(true)}"
         when (UI_MODE) {
-            DocumentListFragment.MODE_DPF -> {
+            DocumentListFragment.MODE_PDF -> {
                 binding.ivDocument.setImageResource(R.mipmap.pdf)
                 binding.ivOpen.setImageResource(R.mipmap.openfileh)
                 binding.ivEmail.setImageResource(R.mipmap.emailh)