Android Method of Obtaining Application Cache Size and Cleaning Cache

As shown below:

package com.lucasey.littleant.frame;

/** 
 *  Wen   Piece   Name : FileCacheUtils.java 
 *  Describe   State :  The main function is to clear the inside / External cache, clear database, clear sharedPreference , clear files And clear the custom directory  
 * */ 

import java.io.File; 
import java.math.BigDecimal; 

import android.content.Context; 
import android.os.Environment; 
import android.text.TextUtils; 

/**  This application data cleanup manager  */ 
public class FileCacheUtils { 
 /** 
 * *  Clear the internal cache of this application (/data/data/com.xxx.xxx/cache) * * 
 * 
 * @param context 
 */ 
 public static void cleanInternalCache(Context context) { 
 deleteFilesByDirectory(context.getCacheDir()); 
 } 

 /** 
 * *  Clear all databases of this application (/data/data/com.xxx.xxx/databases) * * 
 * 
 * @param context 
 */ 
 public static void cleanDatabases(Context context) { 
 deleteFilesByDirectory(new File("/data/data/" 
  + context.getPackageName() + "/databases")); 
 } 

 /** 
 * *  Clear this application SharedPreference(/data/data/com.xxx.xxx/shared_prefs) * 
 * 
 * @param context 
 */ 
 public static void cleanSharedPreference(Context context) { 
 deleteFilesByDirectory(new File("/data/data/" 
  + context.getPackageName() + "/shared_prefs")); 
 } 

 /** 
 * *  Clear this application database by name  * * 
 * 
 * @param context 
 * @param dbName 
 */ 
 public static void cleanDatabaseByName(Context context, String dbName) { 
 context.deleteDatabase(dbName); 
 } 

 /** 
 * *  Clear /data/data/com.xxx.xxx/files Content under  * * 
 * 
 * @param context 
 */ 
 public static void cleanFiles(Context context) { 
 deleteFilesByDirectory(context.getFilesDir()); 
 } 

 /** 
 * *  Clear the outside cache Content under (/mnt/sdcard/android/data/com.xxx.xxx/cache) 
 * 
 * @param context 
 */ 
 public static void cleanExternalCache(Context context) { 
 if (Environment.getExternalStorageState().equals( 
  Environment.MEDIA_MOUNTED)) { 
  deleteFilesByDirectory(context.getExternalCacheDir()); 
 } 
 } 
 /** 
 * *  Clear the files under the custom path. Be careful when using them. Please don't delete them by mistake. And it only supports file deletion under the directory  * * 
 * 
 * @param filePath 
 * */ 
 public static void cleanCustomCache(String filePath) { 
 deleteFilesByDirectory(new File(filePath)); 
 } 

 /** 
 * *  Clear all data of this application  * * 
 * 
 * @param context 
 * @param filepath 
 */ 
 public static void cleanApplicationData(Context context, String... filepath) { 
 cleanInternalCache(context); 
 cleanExternalCache(context); 
 cleanDatabases(context); 
 cleanSharedPreference(context); 
 cleanFiles(context); 
 if (filepath == null) { 
  return; 
 } 
 for (String filePath : filepath) { 
  cleanCustomCache(filePath); 
 } 
 } 

 /** 
 * *  Delete method   Only files in a folder will be deleted here. If the incoming directory Is a file and will not be processed  * * 
 * 
 * @param directory 
 */ 
 private static void deleteFilesByDirectory(File directory) { 
 if (directory != null && directory.exists() && directory.isDirectory()) { 
  for (File item : directory.listFiles()) { 
  item.delete(); 
  } 
 } 
 } 

 //  Get a file  
 //Context.getExternalFilesDir() --> SDCard/Android/data/ Package name of your application /files/  Directory, 1 General release 1 Some data stored for a long time  
 //Context.getExternalCacheDir() --> SDCard/Android/data/ Your application package name /cache/ Directory, 1 Store temporary cache data in general  
 public static long getFolderSize(File file) throws Exception { 
 long size = 0; 
 try { 
  File[] fileList = file.listFiles(); 
  for (int i = 0; i < fileList.length; i++) { 
  //  If there are files below  
  if (fileList[i].isDirectory()) { 
   size = size + getFolderSize(fileList[i]); 
  } else { 
   size = size + fileList[i].length(); 
  } 
  } 
 } catch (Exception e) { 
  e.printStackTrace(); 
 } 
 return size; 
 } 

 /** 
 *  Delete files and directories in specified directories  
 * 
 * @param deleteThisPath 
 * @param filepath 
 * @return 
 */ 
 public static void deleteFolderFile(String filePath, boolean deleteThisPath) { 
 if (!TextUtils.isEmpty(filePath)) { 
  try { 
  File file = new File(filePath); 
  if (file.isDirectory()) {//  If there are files below  
   File files[] = file.listFiles(); 
   for (int i = 0; i < files.length; i++) { 
   deleteFolderFile(files[i].getAbsolutePath(), true); 
   } 
  } 
  if (deleteThisPath) { 
   if (!file.isDirectory()) {//  If it is a file, delete  
   file.delete(); 
   } else {//  Directory  
   if (file.listFiles().length == 0) {//  There are no files or directories under the directory, delete them  
    file.delete(); 
   } 
   } 
  } 
  } catch (Exception e) { 
  // TODO Auto-generated catch block 
  e.printStackTrace(); 
  } 
 } 
 } 

 /** 
 *  Formatting unit  
 * @param size 
 * @return 
 */ 
 public static String getFormatSize(double size) { 
 double kiloByte = size / 1024; 
 if (kiloByte < 1) { 
  return size + "Byte"; 
 } 

 double megaByte = kiloByte / 1024; 
 if (megaByte < 1) { 
  BigDecimal result1 = new BigDecimal(Double.toString(kiloByte)); 
  return result1.setScale(2, BigDecimal.ROUND_HALF_UP) 
   .toPlainString() + "KB"; 
 } 

 double gigaByte = megaByte / 1024; 
 if (gigaByte < 1) { 
  BigDecimal result2 = new BigDecimal(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 = new BigDecimal(teraBytes); 
 return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() 
  + "TB"; 
 } 

 /***
 *  Gets the application cache size 
 * @param file
 * @return
 * @throws Exception
 */
 public static String getCacheSize(File file) throws Exception { 
 return getFormatSize(getFolderSize(file)); 
 } 

}