开始多人协作

app/src/main/java/com/aiosman/riderpro/MainActivity.kt

@@ -90,10 +90,10 @@ fun NavigationController(navController: NavHostController){
         navController = navController,
         startDestination = NavigationItem.Home.route,
         enterTransition = {
-            fadeIn(animationSpec = tween(300))
+            fadeIn(animationSpec = tween(0))
         },
         exitTransition = {
-            fadeOut(animationSpec = tween(300))
+            fadeOut(animationSpec = tween(0))
         }){
         composable(route = NavigationItem.Home.route){
             Home()

app/src/main/java/com/aiosman/riderpro/ShortViewCompose.kt

@@ -35,6 +35,7 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.Shape
 import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.FontWeight
@@ -42,6 +43,8 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.viewinterop.AndroidView
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleEventObserver
 import androidx.media3.common.C
 import androidx.media3.common.MediaItem
 import androidx.media3.common.Player
@@ -131,6 +134,7 @@ fun VideoPlayer(
 ) {
     val context = LocalContext.current
     val scope= rememberCoroutineScope()
+    val lifecycleOwner = LocalLifecycleOwner.current
 
     val exoPlayer = remember {
         ExoPlayer.Builder(context)
@@ -214,6 +218,27 @@ fun VideoPlayer(
             }
         }
 
+        DisposableEffect(lifecycleOwner) {
+            val observer = LifecycleEventObserver { _, event ->
+                when (event) {
+                    Lifecycle.Event.ON_PAUSE -> {
+                        exoPlayer.pause() // 应用进入后台时暂停
+                    }
+                    Lifecycle.Event.ON_RESUME -> {
+                        if (pager == pagerState.currentPage) {
+                            exoPlayer.play() // 返回前台且为当前页面时恢复播放
+                        }
+                    }
+                    else -> {}
+                }
+            }
+            lifecycleOwner.lifecycle.addObserver(observer)
+
+            onDispose {
+                lifecycleOwner.lifecycle.removeObserver(observer)
+            }
+        }
+
 
     }
     Box(modifier = Modifier.fillMaxSize(),