增加几个方法

app/src/main/java/io/legado/app/help/JsExtensions.kt

@@ -18,7 +18,7 @@ import rxhttp.wrapper.param.RxHttp
 import rxhttp.wrapper.param.toByteArray
 import java.io.File
 import java.net.URLEncoder
-import java.nio.charset.Charset
+import java.text.DateFormat
 import java.util.*
 
 @Keep
@@ -104,7 +104,7 @@ interface JsExtensions {
             if (it != null) {
                 for (f in it) {
                     val charsetName = EncodingDetect.getEncode(f)
-                    contents.append(String(f.readBytes(), Charset.forName(charsetName)))
+                    contents.append(String(f.readBytes(), charset(charsetName)))
                             .append("\n")
                 }
                 contents.deleteCharAt(contents.length - 1)
@@ -114,6 +114,13 @@ interface JsExtensions {
         return contents.toString()
     }
 
+    /**
+     * js实现文件夹/文件的删除
+     */
+    fun deleteFolder(path: String) {
+        FileUtils.deleteFile(path)
+    }
+
     /**
      * js实现重定向拦截,网络访问get
      */
@@ -202,6 +209,15 @@ interface JsExtensions {
         return dateFormat.format(Date(time))
     }
 
+    fun timeFormat(time: String): String {
+        val date = DateFormat.getDateTimeInstance().parse(time)
+        return if (date == null) {
+            ""
+        } else {
+            dateFormat.format(date)
+        }
+    }
+
     /**
      * utf8编码转gbk编码
      */
@@ -234,10 +250,20 @@ interface JsExtensions {
     /**
      * 读取本地文件
      */
-    fun readFile(path: String): ByteArray? {
+    fun readFile(path: String): ByteArray {
         return File(path).readBytes()
     }
 
+    fun readTxtFile(path: String): String {
+        val f = File(path)
+        val charsetName = EncodingDetect.getEncode(f)
+        return String(f.readBytes(), charset(charsetName))
+    }
+
+    fun readTxtFile(path: String, charsetName: String): String {
+        return String(File(path).readBytes(), charset(charsetName))
+    }
+
     /**
      * 解析字体,返回字体解析类
      */