publicclassDataCleanManager {
publicstaticString getTotalCacheSize(Context context)throwsException {
longcacheSize = getFolderSize(context.getCacheDir());
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
cacheSize += getFolderSize(context.getExternalCacheDir());
}
returngetFormatSize(cacheSize);
}
publicstaticvoidclearAllCache(Context context) {
deleteDir(context.getCacheDir());
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
deleteDir(context.getExternalCacheDir());
}
}
privatestaticbooleandeleteDir(File dir) {
if(dir !=null&& dir.isDirectory()) {
String[] children = dir.list();
for(inti =0; i < children.length; i++) {
booleansuccess = deleteDir(newFile(dir, children[i]));
if(!success) {
returnfalse;
}
}
}
returndir.delete();
}
// 獲取文件
//Context.getExternalFilesDir() --> SDCard/Android/data/你的應用的包名/files/ 目錄，一般放一些長時間保存的數據
//Context.getExternalCacheDir() --> SDCard/Android/data/你的應用包名/cache/目錄，一般存放臨時緩存數據
publicstaticlonggetFolderSize(File file)throwsException {
longsize =0;
try{
File[] fileList = file.listFiles();
for(inti =0; i < fileList.length; i++) {
// 如果下面還有文件
if(fileList[i].isDirectory()) {
size = size + getFolderSize(fileList[i]);
}else{
size = size + fileList[i].length();
}
}
}catch(Exception e) {
e.printStackTrace();
}
returnsize;
}
/**
* 格式化單位
*
* @param size
* @return
*/
publicstaticString getFormatSize(doublesize) {
doublekiloByte = size /1024;
if(kiloByte <1) {
//??????????? return size + "Byte";
return"0K";
}
doublemegaByte = kiloByte /1024;
if(megaByte <1) {
BigDecimal result1 =newBigDecimal(Double.toString(kiloByte));
returnresult1.setScale(2, BigDecimal.ROUND_HALF_UP)
.toPlainString() +"KB";
}
doublegigaByte = megaByte /1024;
if(gigaByte <1) {
BigDecimal result2 =newBigDecimal(Double.toString(megaByte));
returnresult2.setScale(2, BigDecimal.ROUND_HALF_UP)
.toPlainString() +"MB";
}
doubleteraBytes = gigaByte /1024;
if(teraBytes <1) {
BigDecimal result3 =newBigDecimal(Double.toString(gigaByte));
returnresult3.setScale(2, BigDecimal.ROUND_HALF_UP)
.toPlainString() +"GB";
}
BigDecimal result4 =newBigDecimal(teraBytes);
returnresult4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()
+"TB";
}
}
