項目中碰到了計算緩存大小和清空緩存的功能镐确,這個很常見的功能荠察,幾乎每個APP都有镊掖,以為實現(xiàn)很簡單程储,網上搜了一大堆呛每,發(fā)現(xiàn)都不是符合我需要的缩滨,而且經常刪除的沒有效果呐萨,于是又另外找了一些資料冯挎,折騰了蠻久底哥,終于完成了。以下的這個類的功能很簡單,計算你的緩存總大小趾徽,不管內部緩存還是外部緩存奶陈,和清空緩存,包括內部和外部的緩存一起清空:
public
class DataCleanManager {
public static StringgetTotalCacheSize(Context context) throws Exception {
long cacheSize =getFolderSize(context.getCacheDir());
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
cacheSize +=getFolderSize(context.getExternalCacheDir());
}
return getFormatSize(cacheSize);
}
public static void clearAllCache(Contextcontext) {
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
boolean success = deleteDir(newFile(dir, children[i]));
if (!success) {
return false;
}
}
}
return dir.delete();
}
//獲取文件
//Context.getExternalFilesDir() -->SDCard/Android/data/你的應用的包名/files/目錄附较,一般放一些長時間保存的數(shù)據(jù)
//Context.getExternalCacheDir() -->SDCard/Android/data/你的應用包名/cache/目錄吃粒,一般存放臨時緩存數(shù)據(jù)
public static long getFolderSize(File file)throws Exception {
long size = 0;
try {
File[] fileList =file.listFiles();
for (int i = 0; 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();
}
return size;
}
/**
*格式化單位
* @param size
*/
public static String getFormatSize(doublesize) {
double kiloByte = size / 1024;
if (kiloByte < 1) {
return size + "Byte";
}
double megaByte = kiloByte / 1024;
if (megaByte < 1) {
BigDecimal result1 = newBigDecimal(Double.toString(kiloByte));
return result1.setScale(2,BigDecimal.ROUND_HALF_UP)
.toPlainString() +"KB";
}
double gigaByte = megaByte / 1024;
if (gigaByte < 1) {
BigDecimal result2 = newBigDecimal(Double.toString(megaByte));
return result2.setScale(2,BigDecimal.ROUND_HALF_UP)
.toPlainString() +"MB";
}
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 = newBigDecimal(teraBytes);
return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()
+ "TB";
}
}
當你在項目中需要查下緩存大小,就使用getTotalCacheSize(Context)方法拒课,清空緩存徐勃,就使用clearAllCache(Context)方法。當然早像,開發(fā)完APP也是需要進行全方位的檢測:www.ineice.com僻肖。