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