优化

app/src/main/assets/help/httpTts.md

@@ -0,0 +1,15 @@
+# 在线朗读规则说明
+
+* 在线朗读规则为url规则,同书源url
+* js参数
+~~~
+speakText //朗读文本
+speakSpeed //朗读速度,0-45
+~~~
+* 例:
+~~~
+http://tts.baidu.com/text2audio,{
+    "method": "POST",
+    "body": "tex={{java.encodeURI(java.encodeURI(speakText))}}&spd={{String((speakSpeed + 5) / 10 + 4)}}&per=5003&cuid=baidu_speech_demo&idx=1&cod=2&lan=zh&ctp=1&pdt=1&vol=5&pit=5&_res_tag_=audio"
+}
+~~~

app/src/main/java/io/legado/app/ui/book/read/config/SpeakEngineDialog.kt

@@ -30,6 +30,7 @@ import kotlinx.android.synthetic.main.dialog_http_tts_edit.view.*
 import kotlinx.android.synthetic.main.dialog_recycler_view.*
 import kotlinx.android.synthetic.main.item_http_tts.view.*
 import org.jetbrains.anko.sdk27.listeners.onClick
+import java.io.File
 
 class SpeakEngineDialog : BaseDialogFragment(), Toolbar.OnMenuItemClickListener {
 
@@ -128,7 +129,10 @@ class SpeakEngineDialog : BaseDialogFragment(), Toolbar.OnMenuItemClickListener
                 }
             }
             neutralButton(R.string.help) {
-                TextDialog.show(childFragmentManager, "")
+                val helpStr = String(
+                    requireContext().assets.open("help${File.separator}httpTts.md").readBytes()
+                )
+                TextDialog.show(childFragmentManager, helpStr, TextDialog.MD)
             }
         }.show().applyTint()
     }

app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt

@@ -54,7 +54,7 @@ class MyFragment : BaseFragment(R.layout.fragment_my_config), FileChooserDialog.
     override fun onCompatOptionsItemSelected(item: MenuItem) {
         when (item.itemId) {
             R.id.menu_help -> {
-                val text = String(requireContext().assets.open("help.md").readBytes())
+                val text = String(requireContext().assets.open("help/help.md").readBytes())
                 TextDialog.show(childFragmentManager, text, TextDialog.MD)
             }
         }