搜索网上的方法，使用storageStatsManager.queryStatsForUid()，获得到的数据不正确，使用queryStatsForPackage才拿到正确的数据
public static long getAppStorage(Context context, String packageName) {StorageStatsManager storageStatsManager = (StorageStatsManager) context.getSystemService(Context.STORAGE_STATS_SERVICE);StorageManager storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);List<StorageVolume> storageVolumes = storageManager.getStorageVolumes();long appSizeL =0;for (StorageVolume storageVolume : storageVolumes) {UUID uuid = null;String uuidStr = storageVolume.getUuid();try {if (TextUtils.isEmpty(uuidStr)){uuid = StorageManager.UUID_DEFAULT;}else {uuid = UUID.fromString(uuidStr);}}catch (Exception e){uuid = StorageManager.UUID_DEFAULT;}//通过包名获取uidint uid = 0;try {uid = getUid(context, packageName);} catch (PackageManager.NameNotFoundException e) {e.printStackTrace();}StorageStats storageStats = null;try {UserHandle userHandle = Process.myUserHandle();storageStats = storageStatsManager.queryStatsForPackage(uuid, packageName, userHandle);} catch (Exception e) {e.printStackTrace();return 0;}//获取到App的总大小appSizeL = storageStats.getAppBytes() + storageStats.getCacheBytes() + storageStats.getDataBytes();}return appSizeL;}
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