feat: media card polish - per-index controls, cover jump, wrap, slide transition

app/src/main/java/top/yeij/hearth/media/MediaSessionSource.kt

@@ -2,6 +2,7 @@ package top.yeij.hearth.media
 
 import android.content.ComponentName
 import android.content.Context
+import android.content.Intent
 import android.graphics.Bitmap
 import android.media.MediaMetadata
 import android.media.session.MediaController
@@ -13,11 +14,13 @@ import java.io.ByteArrayOutputStream
 
 // 监听系统活跃媒体会话（支持多个：音乐/听书/视频同时在线），
 // 元数据/播放状态变化时实时回调（切歌、暂停/播放即时推送）；
-// 提供播放控制（上一首/暂停播放/下一首）与封面提取。
+// 提供播放控制（上一首/暂停播放/下一首）、封面提取与跳转播放界面。
 // Watch active media sessions (supports multiple: music/audiobook/video at once),
 // push in real time on metadata/playback-state change (track switch, play/pause);
-// provide transport controls (previous/play-pause/next) and cover extraction.
+// provide transport controls (previous/play-pause/next), cover extraction and
+// jumping to the playback UI.
 class MediaSessionSource(context: Context) {
+    private val appContext = context.applicationContext
     private val msm = context.getSystemService(Context.MEDIA_SESSION_SERVICE) as MediaSessionManager
 
     // 通知监听组件作为授权凭据传入 addOnActiveSessionsChangedListener，
@@ -99,23 +102,48 @@ class MediaSessionSource(context: Context) {
         }
     }
 
-    // 播放控制：作用于第一个（当前展示）controller
-    // Transport controls: act on the first (currently shown) controller
-    fun previous() {
-        controllers.firstOrNull()?.transportControls?.skipToPrevious()
-        Log.d(TAG, "previous")
+    // 播放控制：作用于指定索引的 controller（对应 H5 当前滑到的会话）
+    // Transport controls: act on the controller at the given index (matching the
+    // session the H5 card is currently showing)
+    fun previous(index: Int) {
+        controllers.getOrNull(index)?.transportControls?.skipToPrevious()
+        Log.d(TAG, "previous: index=$index")
     }
 
-    fun next() {
-        controllers.firstOrNull()?.transportControls?.skipToNext()
-        Log.d(TAG, "next")
+    fun next(index: Int) {
+        controllers.getOrNull(index)?.transportControls?.skipToNext()
+        Log.d(TAG, "next: index=$index")
     }
 
-    fun playPause() {
-        val c = controllers.firstOrNull() ?: return
+    fun playPause(index: Int) {
+        val c = controllers.getOrNull(index) ?: return
         val playing = c.playbackState?.state == PlaybackState.STATE_PLAYING
         if (playing) c.transportControls.pause() else c.transportControls.play()
-        Log.d(TAG, "playPause: playing=$playing")
+        Log.d(TAG, "playPause: index=$index playing=$playing")
+    }
+
+    // 跳转到指定会话的播放界面：优先 sessionActivity（PendingIntent），
+    // 失败则回退到启动该 App
+    // Jump to the session's playback UI: prefer sessionActivity (PendingIntent),
+    // fall back to launching the app
+    fun openMediaApp(index: Int) {
+        val c = controllers.getOrNull(index) ?: return
+        val sessionActivity = c.sessionActivity
+        if (sessionActivity != null) {
+            try {
+                sessionActivity.send()
+                Log.d(TAG, "openMediaApp: sessionActivity sent for ${c.packageName}")
+                return
+            } catch (e: Exception) {
+                Log.w(TAG, "openMediaApp: sessionActivity failed: ${e.message}")
+            }
+        }
+        val launch = appContext.packageManager.getLaunchIntentForPackage(c.packageName)
+        if (launch != null) {
+            launch.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            appContext.startActivity(launch)
+            Log.d(TAG, "openMediaApp: launched ${c.packageName}")
+        }
     }
 
     // 更新 controller 列表：注销旧回调、注册新回调