LocalMusic本地播放增加定位歌曲的Button

entry/src/main/ets/pages/SettingPage.ets

@@ -2397,7 +2397,7 @@ export struct SettingPage {
       // Line().width('100%').height(0.3).backgroundColor($r('app.color.index_tab_unselected_font_color'))
       //播控条显示上一首按钮
       Row() {
-        SymbolGlyph($r('sys.symbol.arrow_left'))
+        SymbolGlyph($r('sys.symbol.backward_end_fill'))
           .fontSize(20)
           .fontColor([this.themeColor])
           .alignSelf(ItemAlign.Center)

entry/src/main/ets/view/LocalMusic.ets

@@ -302,6 +302,7 @@ const ITEM_HEIGHT_BIG: number = 78; // 列表项大高度
 @Preview
 @Component
 export struct LocalMusic {
+  @State showFindLocation: boolean = true
   @StorageProp("EnablePointLight") enablePointLight: boolean = true
   @State showSimple: boolean = true//开启沉浸模式
   @State isPaging: boolean = true;//是否分页加载机制
@@ -2149,7 +2150,7 @@ export struct LocalMusic {
     }
   }
 
-  private async hydrateFullMediaPlayListIfNeeded(): Promise<void> {
+  private async hydrateFullMediaPlayListIfNeeded(isSonList:boolean = true): Promise<void> {
     if (this.isHydratingPlayList) {
       return;
     }
@@ -2183,8 +2184,14 @@ export struct LocalMusic {
         }
       }
       if (fullList.length > 0) {
-        this.songList = fullList;
-        this.sonDataSource.pushArrayData(this.songList);
+        if(isSonList){
+          this.songList = fullList;
+          this.sonDataSource.pushArrayData(this.songList);
+        }else{
+          this.videoLocalList = fullList;
+          this.dataSource.pushArrayData(this.videoLocalList);
+        }
+
       }
     } finally {
       this.isHydratingPlayList = false;
@@ -3143,9 +3150,9 @@ export struct LocalMusic {
               }
             })
             // 右侧居中的字母表索引
-            if(this.showZMIndex){
+
               this.indexBuilder()
-            }
+
 
             this.topTitleBar()
           }
@@ -3329,61 +3336,74 @@ export struct LocalMusic {
   //字母表索引
   @Builder
   indexBuilder(){
-    if(this.enableShowAlphabet){
       Column({space: 5}){
-        if(this.isShowAlphaBet&&!(this.modeType==2&&!this.isCanBack)
-          &&!(this.modeType==3&&!this.isCanBack)){
-          AlphabetIndexer({arrayValue: this.alphaBet,selected: this.selectAlphaBetIndex})
-            .attributeModifier(this.alphaBetStyle)
-            .usingPopup(this.isTouchingAlphaBet)
-            .onAreaChange((old_value,new_value)=>{
-              this.alphabetHeight = new_value.height as number
-            })
-            .popupPosition({
-              x: 40,
-              y: this.alphabetHeight / 2
-            })
-            .onSelect((index: number) => {
-              void this.onSelectIndexItem(this.alphaBet[index])
+        if(this.showZMIndex&&this.enableShowAlphabet){
+          if(this.isShowAlphaBet&&!(this.modeType==2&&!this.isCanBack)
+            &&!(this.modeType==3&&!this.isCanBack)){
+            AlphabetIndexer({arrayValue: this.alphaBet,selected: this.selectAlphaBetIndex})
+              .attributeModifier(this.alphaBetStyle)
+              .usingPopup(this.isTouchingAlphaBet)
+              .onAreaChange((old_value,new_value)=>{
+                this.alphabetHeight = new_value.height as number
+              })
+              .popupPosition({
+                x: 40,
+                y: this.alphabetHeight / 2
+              })
+              .onSelect((index: number) => {
+                void this.onSelectIndexItem(this.alphaBet[index])
+              })
+              .onTouch((event: TouchEvent) =>{
+                this.showAlphabetIndex()
+                if(event.type === TouchType.Up || event.type === TouchType.Cancel){
+                  this.isTouchingAlphaBet = false
+                  this.hideAlphabetIndexAfterDelay(1500)
+                }else{
+                  this.isTouchingAlphaBet = true
+                }
+              })
+              .transition(
+                TransitionEffect.translate({x: 10})
+                  .combine(TransitionEffect.opacity(0.1))
+                  .animation({
+                    duration: 150,
+                    curve: Curve.EaseInOut,
+                  })
+              )
+          }
+        }
+        if(this.showFindLocation){
+          if(!(this.showZMIndex&&this.enableShowAlphabet)){
+            Blank()
+              .layoutWeight(1)
+          }
+
+          PointLightDefaultButton({
+            isSysBol:true,
+            pointColor:Color.Black,
+            imageResource:$r('sys.symbol.local_fill'),
+            isPx: false,
+            builderHeight: 30,
+            builderWidth: 30,
+          })
+          // ListLocateButton()
+            .onClick(() =>{
+              void this.locateCurrentSong();
             })
-            .onTouch((event: TouchEvent) =>{
-              this.showAlphabetIndex()
-              if(event.type === TouchType.Up || event.type === TouchType.Cancel){
-                this.isTouchingAlphaBet = false
-                this.hideAlphabetIndexAfterDelay(1500)
-              }else{
-                this.isTouchingAlphaBet = true
-              }
+            .clickEffect({level:ClickEffectLevel.LIGHT,scale: 0.5})
+            .margin({
+              bottom: this.bottomSafeHeight+100,right:10
             })
-            .transition(
-              TransitionEffect.translate({x: 10})
-                .combine(TransitionEffect.opacity(0.1))
-                .animation({
-                  duration: 150,
-                  curve: Curve.EaseInOut,
-                })
-            )
-        }else{
-          Blank()
-            .layoutWeight(1)
         }
 
-        // ListLocateButton()
-        //   .onClick(() =>{
-        //     this.locateSong()
-        //   })
-        //   .clickEffect({level:ClickEffectLevel.LIGHT,scale: 0.5})
-        //   .margin({
-        //     bottom: 10
-        //   })
       }
       .padding({
-        bottom: 0
+        bottom: 0,right:5
       })
       .position({x:'92%'})
       .height('100%')
       .justifyContent(FlexAlign.Center)
-    }
+
   }
 
   async onSelectIndexItem(letter: string) {
@@ -7032,6 +7052,47 @@ export struct LocalMusic {
 
   }
 
+  scrollIndexMain(){
+    try {
+      setTimeout(() => {
+        this.getUIContext()?.animateTo({ duration: 555 }, () => {
+          if(this.curIndex>60){
+            this.listScroller.scrollToIndex(this.curIndex,false, ScrollAlign.CENTER)
+          }else{
+            this.listScroller.scrollToIndex(this.curIndex,true, ScrollAlign.CENTER)
+          }
+
+        })
+      }, 123)
+    }catch (error) {
+      console.error(`onecold scrollIndexMain出错: ${error}`);
+    }
+
+  }
+
+  // 智能定位当前播放歌曲，如果当前页没有则加载完整列表
+  async locateCurrentSong(): Promise<void> {
+    if (!this.currentSong) {
+      console.warn("heanup locateCurrentSong: 当前没有播放的歌曲");
+      return;
+    }
+
+    // 检查当前播放歌曲是否在已加载的列表中
+    const targetIndex = Utility.getIndexFromList(this.videoLocalList, this.currentSong.filePath);
+    
+    if (targetIndex > 0) {
+      // 歌曲在当前列表中，直接滚动
+      console.info("heanup locateCurrentSong: 找到歌曲，索引=" + targetIndex);
+      this.curIndex = targetIndex;
+    } else {
+      // 歌曲不在当前列表中，加载当前歌曲再第几页完整列表后再定位
+      console.info("heanup locateCurrentSong: 歌曲不在当前列表，开始加载完整列表");
+      await this.hydrateFullMediaPlayListIfNeeded(false);
+
+    }
+    this.scrollIndexMain();
+  }
+
   //播放列表布局
   @Builder
   PlayListSheet() {