package com.jianong.xmtt.util;
import android.content.Context;
import android.os.Environment;
import java.io.File;
import java.math.BigDecimal;
/**
* Created by hgl on 2016/6/23.
*/
public class DataCleanManager {
/**
* 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);
}
/**
* 清除缓存
* @param context
*/
public static void clearAllCache(Context context) {
deleteDir(context.getCacheDir());
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
deleteDir(context.getExternalCacheDir());
}
}
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();
}
// 获取文件大小
//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;
}
/**
* 格式化单位
* @param size
* @return
*/
public static String getFormatSize(
double size) {
double kiloByte = size / 1024
;
if (kiloByte < 1
) {
// return size + "Byte";
return "0K"
;
}
double megaByte = kiloByte / 1024
;
if (megaByte < 1
) {
BigDecimal result1 =
new BigDecimal(Double.toString(kiloByte));
return result1.setScale(2
, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "K"
;
}
double gigaByte = megaByte / 1024
;
if (gigaByte < 1
) {
BigDecimal result2 =
new BigDecimal(Double.toString(megaByte));
return result2.setScale(2
, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "M"
;
}
double teraBytes = gigaByte / 1024
;
if (teraBytes < 1
) {
BigDecimal result3 =
new BigDecimal(Double.toString(gigaByte));
return result3.setScale(2
, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "GB"
;
}
BigDecimal result4 =
new BigDecimal(teraBytes);
return result4.setScale(2
, BigDecimal.ROUND_HALF_UP).toPlainString()
+ "TB"
;
}
}
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