add sentence service

android/sample-app/src/main/java/cn/learningpad/oraltrainer/sample/MainActivity.kt

@@ -1,6 +1,7 @@
 package cn.learningpad.oraltrainer.sample
 
 import android.app.Activity
+import android.content.Intent
 import android.graphics.Color
 import android.net.Uri
 import android.os.Bundle
@@ -19,9 +20,16 @@ import cn.learningpad.oraltrainer.sdk.OralTrainerSdk
 import cn.learningpad.oraltrainer.sdk.PlaybackSnapshot
 import cn.learningpad.oraltrainer.sdk.PlayerConfig
 import cn.learningpad.oraltrainer.sdk.SentenceBoundary
+import cn.learningpad.oraltrainer.sdk.SentenceBoundaryApiCallback
 import cn.learningpad.oraltrainer.sdk.TrainingMediaItem
+import cn.learningpad.oraltrainer.sdk.SentenceBoundaryApiResult
 
 class MainActivity : Activity() {
+    private companion object {
+        const val PICK_VIDEO_REQUEST = 1001
+    }
+
+    private lateinit var sdk: OralTrainerSdk
     private lateinit var controller: OralTrainerController
     private lateinit var statusText: TextView
     private lateinit var sentenceText: TextView
@@ -29,7 +37,7 @@ class MainActivity : Activity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        val sdk = OralTrainerSdk.init(this)
+        sdk = OralTrainerSdk.init(this)
         controller = sdk.createController(
             playerConfig = PlayerConfig(
                 sentenceMode = true,
@@ -66,8 +74,8 @@ class MainActivity : Activity() {
             addView(commandButton("快退") { controller.rewind() })
             addView(commandButton("播放/暂停") { controller.togglePlayPause() })
             addView(commandButton("快进") { controller.fastForward() })
-            addView(commandButton("上一句") { controller.seekToPreviousSentence() })
-            addView(commandButton("下一句") { controller.seekToNextSentence() })
+            addView(commandButton("上一句") { controller.previousSentenceOrRewind() })
+            addView(commandButton("下一句") { controller.nextSentenceOrForward() })
         }
 
         val root = LinearLayout(this).apply {
@@ -77,6 +85,10 @@ class MainActivity : Activity() {
             addView(statusText)
             addView(sentenceText)
             addView(controls)
+            addView(Button(this@MainActivity).apply {
+                text = "选择本地视频"
+                setOnClickListener { openLocalVideoPicker() }
+            })
         }
         setContentView(root)
 
@@ -108,6 +120,37 @@ class MainActivity : Activity() {
         controller.loadItem(sampleOnlineLesson())
     }
 
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        if (requestCode != PICK_VIDEO_REQUEST || resultCode != RESULT_OK) {
+            return
+        }
+        val uri = data?.data ?: return
+        val persistableFlags = data.flags and Intent.FLAG_GRANT_READ_URI_PERMISSION
+        if (persistableFlags != 0) {
+            runCatching {
+                contentResolver.takePersistableUriPermission(uri, persistableFlags)
+            }
+        }
+        val item = TrainingMediaItem(
+            id = uri.toString(),
+            title = uri.lastPathSegment ?: "本地视频",
+            uri = uri,
+        )
+        controller.loadItem(item)
+        statusText.text = "正在获取句子边界..."
+        sdk.sentenceBoundaryApi.fetchForUri(uri, contentResolver, object : SentenceBoundaryApiCallback {
+            override fun onSuccess(result: SentenceBoundaryApiResult) {
+                controller.loadItem(item.copy(sentences = result.sentences))
+                statusText.text = "句子边界已加载：${result.sentences.size} 句"
+            }
+
+            override fun onError(error: Throwable) {
+                statusText.text = "句子边界获取失败，使用 10 秒跳转：${error.message.orEmpty()}"
+            }
+        })
+    }
+
     override fun onDestroy() {
         controller.release()
         super.onDestroy()
@@ -128,6 +171,18 @@ class MainActivity : Activity() {
         }
     }
 
+    private fun openLocalVideoPicker() {
+        startActivityForResult(
+            Intent(Intent.ACTION_OPEN_DOCUMENT).apply {
+                addCategory(Intent.CATEGORY_OPENABLE)
+                type = "video/*"
+                addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION)
+            },
+            PICK_VIDEO_REQUEST,
+        )
+    }
+
     private fun sampleOnlineLesson(): TrainingMediaItem {
         return TrainingMediaItem(
             id = "online_sample_01",