增加阅读界面长按选择文字朗读功能

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

@@ -7,6 +7,7 @@ import android.content.Intent
 import android.content.pm.ResolveInfo
 import android.net.Uri
 import android.os.Build
+import android.speech.tts.TextToSpeech
 import android.view.LayoutInflater
 import android.view.Menu
 import android.view.ViewGroup
@@ -19,6 +20,7 @@ import androidx.core.view.isVisible
 import io.legado.app.R
 import io.legado.app.base.adapter.ItemViewHolder
 import io.legado.app.base.adapter.SimpleRecyclerAdapter
+import io.legado.app.service.BaseReadAloudService
 import io.legado.app.utils.gone
 import io.legado.app.utils.isAbsUrl
 import io.legado.app.utils.sendToClip
@@ -28,10 +30,12 @@ import kotlinx.android.synthetic.main.popup_action_menu.view.*
 import org.jetbrains.anko.sdk27.listeners.onClick
 import org.jetbrains.anko.share
 import org.jetbrains.anko.toast
+import java.util.*
 
 @SuppressLint("RestrictedApi")
 class TextActionMenu(private val context: Context, private val callBack: CallBack) :
-    PopupWindow(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT) {
+    PopupWindow(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT),
+    TextToSpeech.OnInitListener {
 
     private val adapter = Adapter(context)
     private val menu = MenuBuilder(context)
@@ -111,6 +115,13 @@ class TextActionMenu(private val context: Context, private val callBack: CallBac
         when (item.itemId) {
             R.id.menu_copy -> context.sendToClip(callBack.selectedText)
             R.id.menu_share_str -> context.share(callBack.selectedText)
+            R.id.menu_aloud -> {
+                if (BaseReadAloudService.isRun) {
+                    context.toast(R.string.alouding_disable)
+                    return
+                }
+                readAloud(callBack.selectedText)
+            }
             R.id.menu_browser -> {
                 try {
                     val intent = if (callBack.selectedText.isAbsUrl()) {
@@ -137,6 +148,31 @@ class TextActionMenu(private val context: Context, private val callBack: CallBac
         }
     }
 
+    private var textToSpeech: TextToSpeech? = null
+    private var ttsInitFinish = false
+    private var lastText: String = ""
+
+    @SuppressLint("SetJavaScriptEnabled")
+    private fun readAloud(text: String) {
+        if (textToSpeech == null && !ttsInitFinish) {
+            lastText = text
+            textToSpeech = TextToSpeech(context, this)
+            return
+        }
+        if (text == "") return
+        if (textToSpeech?.isSpeaking == true)
+            textToSpeech?.stop()
+        textToSpeech?.speak(text, TextToSpeech.QUEUE_ADD, null, "select_text")
+        lastText = ""
+    }
+
+    @Synchronized
+    override fun onInit(status: Int) {
+        textToSpeech?.language = Locale.CHINA
+        ttsInitFinish = true
+        readAloud(lastText)
+    }
+
     @RequiresApi(Build.VERSION_CODES.M)
     private fun createProcessTextIntent(): Intent {
         return Intent()

app/src/main/res/menu/content_select_action.xml

@@ -9,6 +9,10 @@
         android:id="@+id/menu_copy"
         android:title="@android:string/copy" />
 
+    <item
+        android:id="@+id/menu_aloud"
+        android:title="@string/read_aloud" />
+
     <item
         android:id="@+id/menu_browser"
         android:title="@string/browser" />

app/src/main/res/values/strings.xml

@@ -648,4 +648,5 @@
     <string name="main_menu">主菜单</string>
     <string name="request_permission">点击授予权限</string>
     <string name="tip_local_perm_request_storage">阅读需要访问存储卡权限，请点击下方的"授予权限"按钮，或前往“设置”—“应用权限”—打开所需权限。如果授予权限后仍然不正常，请点击右上角的“选择文件夹”，使用系统文件夹选择器。</string>
+    <string name="alouding_disable">全文朗读中不能朗读选中文字</string>
 </resources>