媒体库、艺术家、专辑 做缓存处理

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

@@ -145,6 +145,9 @@ const ITEM_HEIGHT_BIG: number = 78; // 列表项大高度
 @Preview
 @Component
 export struct LocalMusic {
+  @State mediaKuCount: number = 0;
+  @State albumCount: number = 0;
+  @State artistCount: number = 0;
   @State fastForwardSeconds: string = '10'
   @State isShowBackFast: boolean = true//快进快退按钮
   @State isCanAuto:boolean = true
@@ -505,16 +508,9 @@ export struct LocalMusic {
       this.appName = appName
     })
     this.packName = AppUtil.getBundleName()
-    this.loadCacheFromStorage(); // 加载缓存
-    // 在首页初始化时读取媒体库缓存数据
-    let cachedListStr:string = PreferencesUtil.getStringSync('mediaKuList',  '[]');
-    let cachedList = JSON.parse(cachedListStr) as Array<VideoItem>;
-    if(ArrayUtil.isNotEmpty(cachedList)){
-      this.mediaKuList = cachedList
-      if(this.modeType==1){
-        this.updateListData(this.mediaKuList)
-      }
-    }
+    this.loadCacheFromStorage(); // 加载文件夹缓存
+    // 在首页初始化时读取媒体库,艺术家，专辑等缓存数据
+    this.initLoadCache()
 
     this.mkDownLoadDir()
 
@@ -628,6 +624,45 @@ export struct LocalMusic {
 
   }
 
+  //载入媒体库，艺术家，专辑等缓存
+  initLoadCache(){
+    this.mediaKuCount = PreferencesUtil.getNumberSync('mediaKuCount', 0)
+    this.artistCount = PreferencesUtil.getNumberSync('artistCount', 0)
+    this.albumCount = PreferencesUtil.getNumberSync('albumCount', 0)
+    let cachedListStr:string = PreferencesUtil.getStringSync('mediaKuList',  '[]');
+    let cachedList = JSON.parse(cachedListStr) as Array<VideoItem>;
+    if(ArrayUtil.isNotEmpty(cachedList)){
+      this.mediaKuList = cachedList
+      if(this.modeType==1){
+        this.updateListData(this.mediaKuList)
+      }
+    }
+
+    let artistListStr:string = PreferencesUtil.getStringSync('artistList',  '[]');
+    let artistCachedList = JSON.parse(artistListStr) as Array<VideoItem>;
+    if(ArrayUtil.isNotEmpty(artistCachedList)){
+      this.artistList = artistCachedList
+      let artistMapStr:string = PreferencesUtil.getStringSync('artistMap',  '[]');
+      const parsedArray = JSON.parse(artistMapStr)  as [string, VideoItem[]][];
+      this.artistMap  = new Map(parsedArray);
+      // this.artistMap = JSON.parse(artistMapStr) as Map<string, VideoItem[]>;
+      if(this.modeType==2){
+        this.updateListData(this.artistList)
+      }
+    }
+    let albumListStr:string = PreferencesUtil.getStringSync('albumList',  '[]');
+    let albumCachedList = JSON.parse(albumListStr) as Array<VideoItem>;
+    if(ArrayUtil.isNotEmpty(albumCachedList)){
+      this.albumList = albumCachedList
+      let albumMapStr:string = PreferencesUtil.getStringSync('albumMap',  '[]');
+      const parsedArray = JSON.parse(albumMapStr)  as [string, VideoItem[]][];
+      this.albumMap  = new Map(parsedArray);
+      if(this.modeType==3){
+        this.updateListData(this.albumList)
+      }
+    }
+  }
+
   startAutoHide() {
     if(this.isHiCar()){
       return
@@ -798,10 +833,10 @@ export struct LocalMusic {
             this.updateListData(this.mediaKuList)
           }
           PreferencesUtil.putSync('mediaKuCount', this.mediaKuList.length)
-          // 处理媒体库前50条记录，列表长度并存储到PreferencesUtil
-          if (ArrayUtil.isNotEmpty(this.mediaKuList)&&this.mediaKuList.length  > 50) {
-            // 只保存前50条记录到缓存中
-            let truncatedList = this.mediaKuList.slice(0,  50);
+          // 处理媒体库前100条记录，列表长度并存储到PreferencesUtil
+          if (ArrayUtil.isNotEmpty(this.mediaKuList)&&this.mediaKuList.length  > 100) {
+            // 只保存前100条记录到缓存中
+            let truncatedList = this.mediaKuList.slice(0,  100);
             PreferencesUtil.putSync('mediaKuList',  JSON.stringify(truncatedList));
           } else {
             PreferencesUtil.putSync('mediaKuList',  JSON.stringify(this.mediaKuList));
@@ -811,6 +846,17 @@ export struct LocalMusic {
           this.artistMap = e.data.data1;
           this.artistList = e.data.data2;
           PreferencesUtil.putSync('artistCount', this.artistList.length)
+
+          // 处理艺术家前100条记录，列表长度并存储到PreferencesUtil
+          if (ArrayUtil.isNotEmpty(this.artistList)&&this.artistList.length  > 100) {
+            // 只保存前100条记录到缓存中
+            let truncatedList = this.artistList.slice(0,  100);
+            PreferencesUtil.putSync('artistList',  JSON.stringify(truncatedList));
+          } else {
+            PreferencesUtil.putSync('artistList',  JSON.stringify(this.artistList));
+          }
+          const mapArray = Array.from(this.artistMap.entries());
+          PreferencesUtil.putSync('artistMap',  JSON.stringify(mapArray));
           break;
 
         case 104: //收到查询专辑列表
@@ -824,6 +870,16 @@ export struct LocalMusic {
             this.startPlayOrResumePlay()
           }
           PreferencesUtil.putSync('albumCount', this.albumList.length)
+          // 处理专辑前100条记录，列表长度并存储到PreferencesUtil
+          if (ArrayUtil.isNotEmpty(this.albumList)&&this.albumList.length  > 100) {
+            // 只保存前100条记录到缓存中
+            let truncatedList = this.albumList.slice(0,  100);
+            PreferencesUtil.putSync('albumList',  JSON.stringify(truncatedList));
+          } else {
+            PreferencesUtil.putSync('albumList',  JSON.stringify(this.albumList));
+          }
+          const mapArrayAlbum = Array.from(this.albumMap.entries());
+          PreferencesUtil.putSync('albumMap',  JSON.stringify(mapArrayAlbum));
           break;
 
       }
@@ -3146,12 +3202,14 @@ export struct LocalMusic {
             .margin({ left: 8 })
             .fillColor(this.themeColor)
 
-          Text(`共找到${this.artistList.length}位艺术家`)
+          Text(this.artistList.length ==100  ? `共找到${this.artistCount}位艺术家`
+            :`共找到${this.artistList.length}位艺术家`)
             .fontColor($r('app.color.text_color'))
             .fontSize(14)
             .opacity(this.opacityItem)
             .visibility(this.modeType === 2 ? Visibility.Visible : Visibility.None)
-          Text(`共找到${this.albumList.length}张专辑`)
+          Text(this.albumList.length ==100  ? `共找到${this.albumCount+''}张专辑`
+            :`共找到${this.albumList.length}张专辑`)
             .fontColor($r('app.color.text_color'))
             .opacity(this.opacityItem)
             .visibility(this.modeType === 3 ? Visibility.Visible : Visibility.None)
@@ -3256,7 +3314,9 @@ export struct LocalMusic {
               curve: 'ease-in-out' // 可选动画曲线
             })
           if(Utility.getGlobalList(this.videoLocalList, CommonConstants.TYPE_LOCAL).length>0){
-            Text(`(${Utility.getGlobalList(this.videoLocalList, CommonConstants.TYPE_LOCAL).length}首)`)
+            Text(this.modeType==1&&Utility.getGlobalList(this.videoLocalList, CommonConstants.TYPE_LOCAL).length==100?
+              `(${this.mediaKuCount}首)`
+              :`(${Utility.getGlobalList(this.videoLocalList, CommonConstants.TYPE_LOCAL).length}首)`)
               .fontColor($r('app.color.text_color'))
               .fontSize(14)
               .opacity(this.opacityItem)