...

app/src/main/java/com/base/pdfviewerscannerwhite/helper/BaseActivity.kt

 package com.base.pdfviewerscannerwhite.helper
 
 import android.app.Dialog
-import android.content.ComponentCallbacks
 import android.content.Intent
-import android.os.Build
 import android.os.Bundle
 import android.os.LocaleList
 import androidx.appcompat.app.AppCompatActivity
@@ -14,10 +12,6 @@ import com.base.pdfviewerscannerwhite.ui.main.MainActivity
 import com.base.pdfviewerscannerwhite.utils.ActivityLauncher
 import com.base.pdfviewerscannerwhite.utils.ActivityManagerUtils
 import com.base.pdfviewerscannerwhite.utils.LogEx
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.MainScope
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.launch
 import java.util.Locale
 
 abstract class BaseActivity<T : ViewBinding> : AppCompatActivity() {

app/src/main/java/com/base/pdfviewerscannerwhite/helper/MyApplication.kt

@@ -20,6 +20,11 @@ class MyApplication : Application() {
 
         var mainLanguage: String = Locale.ENGLISH.language
         var setLanguage: String = Locale.ENGLISH.language
+        var feedbackLanguage: String = Locale.ENGLISH.language
+        var pptLanguage: String = Locale.ENGLISH.language
+        var pdfLanguage: String = Locale.ENGLISH.language
+        var pdfLoadingLanguage: String = Locale.ENGLISH.language
+        var pdfMergeLanguage: String = Locale.ENGLISH.language
 
         @JvmField
         var PAUSED_VALUE = 0

app/src/main/java/com/base/pdfviewerscannerwhite/ui/document/pdf/PdfActivity.kt

@@ -30,6 +30,7 @@ import com.base.pdfviewerscannerwhite.bean.ConstObject.haveGuideGesture
 import com.base.pdfviewerscannerwhite.bean.PdfPageBean
 import com.base.pdfviewerscannerwhite.databinding.ActivityPdfBinding
 import com.base.pdfviewerscannerwhite.helper.BaseActivity
+import com.base.pdfviewerscannerwhite.helper.MyApplication
 import com.base.pdfviewerscannerwhite.utils.KeyBoardUtils.hideKeyboard
 import com.base.pdfviewerscannerwhite.utils.KeyBoardUtils.showKeyBoard
 import com.base.pdfviewerscannerwhite.utils.LogEx
@@ -59,6 +60,13 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
         ActivityPdfBinding.inflate(layoutInflater)
     }
 
+    override fun onResume() {
+        super.onResume()
+        updateAppLanguage(MyApplication.pdfLanguage) {
+            MyApplication.pdfLanguage = it
+        }
+    }
+
     override fun initView() {
 
         val metrics = DisplayMetrics()

app/src/main/java/com/base/pdfviewerscannerwhite/ui/document/pdf/PdfLoadingActivity.kt

@@ -8,6 +8,7 @@ import com.base.pdfviewerscannerwhite.bean.ConstObject.DO_SAVE_PDF
 import com.base.pdfviewerscannerwhite.bean.ConstObject.DO_SPLIT_PDF
 import com.base.pdfviewerscannerwhite.databinding.ActivityPdfLoadingBinding
 import com.base.pdfviewerscannerwhite.helper.BaseActivity
+import com.base.pdfviewerscannerwhite.helper.MyApplication
 import com.base.pdfviewerscannerwhite.utils.LogEx
 import com.base.pdfviewerscannerwhite.utils.ToastUtils.toast
 import kotlinx.coroutines.Dispatchers
@@ -35,6 +36,13 @@ class PdfLoadingActivity : BaseActivity<ActivityPdfLoadingBinding>() {
     private var progressFinishAction: (() -> Unit)? = null
 
     var resultFile: File? = null
+    override fun onResume() {
+        super.onResume()
+        updateAppLanguage(MyApplication.pdfLoadingLanguage) {
+            MyApplication.pdfLoadingLanguage = it
+        }
+    }
+
     override fun initView() {
         pdfPresenter = PdfPresenter(this)
         initSpPa()

app/src/main/java/com/base/pdfviewerscannerwhite/ui/document/pdf/PdfMergeActivity.kt

@@ -8,13 +8,13 @@ import com.base.pdfviewerscannerwhite.bean.ConstObject.DO_MERGE_PDF
 import com.base.pdfviewerscannerwhite.bean.DocumentBean
 import com.base.pdfviewerscannerwhite.databinding.ActivityPdfMergeBinding
 import com.base.pdfviewerscannerwhite.helper.BaseActivity
+import com.base.pdfviewerscannerwhite.helper.MyApplication
 import com.base.pdfviewerscannerwhite.ui.view.DialogView.showDocumentRenameDialog
 import com.base.pdfviewerscannerwhite.ui.view.PdfDialog.showPdfPwdDialog
 import com.base.pdfviewerscannerwhite.utils.KotlinExt.toFormatTime2
 import com.base.pdfviewerscannerwhite.utils.LogEx
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.cancel
-import kotlinx.coroutines.delay
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import java.util.concurrent.ArrayBlockingQueue
@@ -30,6 +30,12 @@ class PdfMergeActivity : BaseActivity<ActivityPdfMergeBinding>() {
     private lateinit var pdfPresenter: PdfPresenter
     private lateinit var adapter: PdfMergeAdapter
 
+    override fun onResume() {
+        super.onResume()
+        updateAppLanguage(MyApplication.pdfMergeLanguage) {
+            MyApplication.pdfMergeLanguage = it
+        }
+    }
 
     override fun initView() {
         pdfPresenter = PdfPresenter(this)

app/src/main/java/com/base/pdfviewerscannerwhite/ui/document/ppt/PptActivity.kt

@@ -12,6 +12,7 @@ import androidx.core.view.isVisible
 import com.base.pdfviewerscannerwhite.bean.DocumentBean
 import com.base.pdfviewerscannerwhite.databinding.ActivityPptBinding
 import com.base.pdfviewerscannerwhite.helper.BaseActivity
+import com.base.pdfviewerscannerwhite.helper.MyApplication
 import com.base.pdfviewerscannerwhite.ui.view.DialogView.showDocumentMore
 import com.base.pdfviewerscannerwhite.utils.LogEx
 import com.base.pdfviewerscannerwhite.utils.SpStringUtils
@@ -47,6 +48,13 @@ class PptActivity : BaseActivity<ActivityPptBinding>() {
 
     }
 
+    override fun onResume() {
+        super.onResume()
+        updateAppLanguage(MyApplication.pptLanguage) {
+            MyApplication.pptLanguage = it
+        }
+    }
+
     private var totalPageNumber = 0
 
     @SuppressLint("SetTextI18n")

app/src/main/java/com/base/pdfviewerscannerwhite/ui/set/FeedbackActivity.kt

@@ -4,6 +4,7 @@ import androidx.activity.addCallback
 import androidx.core.widget.addTextChangedListener
 import com.base.pdfviewerscannerwhite.databinding.ActivityFeedbackBinding
 import com.base.pdfviewerscannerwhite.helper.BaseActivity
+import com.base.pdfviewerscannerwhite.helper.MyApplication
 import com.base.pdfviewerscannerwhite.utils.ToastUtils.toast
 
 class FeedbackActivity : BaseActivity<ActivityFeedbackBinding>() {
@@ -16,6 +17,13 @@ class FeedbackActivity : BaseActivity<ActivityFeedbackBinding>() {
 
     }
 
+    override fun onResume() {
+        super.onResume()
+        updateAppLanguage(MyApplication.feedbackLanguage) {
+            MyApplication.feedbackLanguage = it
+        }
+    }
+
     override fun initListener() {
         super.initListener()
         onBackPressedDispatcher.addCallback {