优化

app/src/main/java/io/legado/app/help/http/EncodeConverter.kt

@@ -1,5 +1,6 @@
 package io.legado.app.help.http
 
+import io.legado.app.utils.EncodingDetect
 import io.legado.app.utils.UTF8BOMFighter
 import okhttp3.ResponseBody
 import retrofit2.Converter

app/src/main/java/io/legado/app/model/localbook/AnalyzeTxtFile.kt

@@ -0,0 +1,21 @@
+package io.legado.app.model.localbook
+
+import android.content.Context
+import android.net.Uri
+import io.legado.app.data.entities.Book
+import io.legado.app.utils.EncodingDetect
+
+object AnalyzeTxtFile {
+
+
+    fun analyze(context: Context, book: Book) {
+        context.contentResolver.openInputStream(Uri.parse(book.bookUrl))?.use { stream ->
+            val rawByteArray = ByteArray(2000)
+            stream.read(rawByteArray)
+            book.charset = EncodingDetect.getJavaEncode(rawByteArray)
+
+
+        }
+    }
+
+}

app/src/main/java/io/legado/app/utils/EncodingDetect.java

@@ -1,6 +1,7 @@
-package io.legado.app.help.http;
+package io.legado.app.utils;
 
 import androidx.annotation.NonNull;
+
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
@@ -119,19 +120,19 @@ public class EncodingDetect {
 class BytesEncodingDetect extends Encoding {
     // Frequency tables to hold the GB, Big5, and EUC-TW character
     // frequencies
-    int GBFreq[][];
+    int[][] GBFreq;
 
-    int GBKFreq[][];
+    int[][] GBKFreq;
 
-    int Big5Freq[][];
+    int[][] Big5Freq;
 
-    int Big5PFreq[][];
+    int[][] Big5PFreq;
 
-    int EUC_TWFreq[][];
+    int[][] EUC_TWFreq;
 
-    int KRFreq[][];
+    int[][] KRFreq;
 
-    int JPFreq[][];
+    int[][] JPFreq;
 
     // int UnicodeFreq[94][128];
     // public static String[] nicename;
@@ -170,7 +171,6 @@ class BytesEncodingDetect extends Encoding {
                     rawtext.length - byteoffset)) > 0) {
                 byteoffset += bytesread;
             }
-            ;
             chinesestream.close();
             guess = detectEncoding(rawtext);
         } catch (Exception e) {