Android缓存清理
public classCacheDataManager {
public staticStringgetTotalCacheSize(Context context)throwsException {
longcacheSize =getFolderSize(context.getCacheDir());
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
cacheSize +=getFolderSize(context.getExternalCacheDir());
}
returngetFormatSize(cacheSize);
}
public static voidclearAllCache(Context context) {
deleteDir(context.getCacheDir());
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
deleteDir(context.getExternalCacheDir());
}
}
private static booleandeleteDir(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) {
return false;
}
}
}
returndir.delete();
}
// 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 longgetFolderSize(File file)throwsException {
longsize =0;
try{
File[] fileList = file.listFiles();
for(inti =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();
}
returnsize;
}
/**
* 格式化单位
*
*@paramsize
*/
public staticStringgetFormatSize(doublesize) {
doublekiloByte = size /1024;
if(kiloByte <1) {
returnsize +"Byte";
}
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";
}
}
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