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104 changes: 104 additions & 0 deletions
104
app/src/main/java/com/idormy/sms/forwarder/utils/CacheUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| package com.idormy.sms.forwarder.utils; | ||
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| import android.content.Context; | ||
| import android.os.Environment; | ||
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| import java.io.File; | ||
| import java.math.BigDecimal; | ||
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| public class CacheUtil { | ||
| /** | ||
| * 获取缓存大小 | ||
| * | ||
| * @param context | ||
| * @return | ||
| * @throws Exception | ||
| */ | ||
| public static String getTotalCacheSize(Context context) throws Exception { | ||
| long cacheSize = getFolderSize(context.getCacheDir()); | ||
| if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { | ||
| cacheSize += getFolderSize(context.getExternalCacheDir()); | ||
| } | ||
| return getFormatSize(cacheSize); | ||
| } | ||
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| /*** | ||
| * 清理所有缓存 | ||
| * @param context | ||
| */ | ||
| public static void clearAllCache(Context context) { | ||
| deleteDir(context.getCacheDir()); | ||
| if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { | ||
| deleteDir(context.getExternalCacheDir()); | ||
| } | ||
| } | ||
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| private static boolean deleteDir(File dir) { | ||
| if (dir != null && dir.isDirectory()) { | ||
| String[] children = dir.list(); | ||
| for (int i = 0; i < children.length; i++) { | ||
| boolean success = deleteDir(new File(dir, children[i])); | ||
| if (!success) { | ||
| return false; | ||
| } | ||
| } | ||
| } | ||
| return dir.delete(); | ||
| } | ||
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| // 获取文件 | ||
| //Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/ 目录，一般放一些长时间保存的数据 | ||
| //Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据 | ||
| public static long getFolderSize(File file) throws Exception { | ||
| long size = 0; | ||
| try { | ||
| File[] fileList = file.listFiles(); | ||
| for (int i = 0; i < fileList.length; i++) { | ||
| // 如果下面还有文件 | ||
| if (fileList[i].isDirectory()) { | ||
| size = size + getFolderSize(fileList[i]); | ||
| } else { | ||
| size = size + fileList[i].length(); | ||
| } | ||
| } | ||
| } catch (Exception e) { | ||
| e.printStackTrace(); | ||
| } | ||
| return size; | ||
| } | ||
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| /** | ||
| * 格式化单位 | ||
| * | ||
| * @param size | ||
| * @return | ||
| */ | ||
| public static String getFormatSize(double size) { | ||
| double kiloByte = size / 1024; | ||
| if (kiloByte < 1) { | ||
| return "0KB"; | ||
| } | ||
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| double megaByte = kiloByte / 1024; | ||
| if (megaByte < 1) { | ||
| BigDecimal result1 = new BigDecimal(Double.toString(kiloByte)); | ||
| return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB"; | ||
| } | ||
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| double gigaByte = megaByte / 1024; | ||
| if (gigaByte < 1) { | ||
| BigDecimal result2 = new BigDecimal(Double.toString(megaByte)); | ||
| return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB"; | ||
| } | ||
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| double teraBytes = gigaByte / 1024; | ||
| if (teraBytes < 1) { | ||
| BigDecimal result3 = new BigDecimal(Double.toString(gigaByte)); | ||
| return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB"; | ||
| } | ||
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| BigDecimal result4 = new BigDecimal(teraBytes); | ||
| return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB"; | ||
| } | ||
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| } |
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