主要功能有清除内/外缓存，清除数据库，清除sharedPreference，清除files和清除自定义目录，主要代码如下：
import android.content.Context;import android.os.Environment;import android.text.TextUtils;import java.io.File;import java.math.BigDecimal;/*** @author :huangxianfeng on /6/30.*本应用数据清除管理器* 主要功能有清除内/外缓存，清除数据库，清除sharedPreference，清除files和清除自定义目录*/public class DataCleanManager {private static DataCleanManager instance;private DataCleanManager(){};public static DataCleanManager getInstance(){if(instance == null){synchronized (DataCleanManager.class){if (instance == null){instance = new DataCleanManager();}}}return instance;}/**获取缓存的大小*/public String getTotalCacheSize(Context context) throws Exception {long iconPathSize = getFolderSize(new File(SDCardUtil.getInstance().getIconPath()));long loadPicPathSize = getFolderSize(new File(SDCardUtil.getInstance().getUploadPicPath()));long cacheSize = getFolderSize(context.getCacheDir());long deBugSize = getFolderSize(new File(SDCardUtil.getInstance().getDebugPath()));long downloadPath = getFolderSize(new File(SDCardUtil.getInstance().getDownloadPath()));if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {cacheSize += getFolderSize(context.getExternalCacheDir());}System.out.println("CacheSize...iconPathSize="+iconPathSize);System.out.println("CacheSize...loadPicPathSize="+loadPicPathSize);System.out.println("CacheSize...cacheSize="+cacheSize);System.out.println("CacheSize...deBugSize="+deBugSize);System.out.println("CacheSize...downloadPath="+downloadPath);System.out.println("----------------------------------");return getFormatSize(cacheSize + deBugSize + iconPathSize + loadPicPathSize+downloadPath);}/**清除缓存*/public void clearAllCache(Context context) {//在此地方进行清除// BitmapUtil.getInstance().getBitmapUtils().clearMemoryCache();// BitmapUtil.getInstance().getBitmapUtils().clearCache();// BitmapUtil.getInstance().getBitmapUtils().clearDiskCache();CommentDao.getInstance().clearAll();NoticeDao.getInstance().clearAll();CivistateDao.getInstance().clearAll();UserCommentListDao.getInstance().clearData();deleteFilesByDirectory(new File(SDCardUtil.getInstance().getUploadPicPath()));//清除拍照留下的剪切原图deleteFilesByDirectory(new File(SDCardUtil.getInstance().getIconPath()));deleteFilesByDirectory(new File(SDCardUtil.getInstance().getDownloadPath()));deleteDir(context.getCacheDir());deleteDir(new File(SDCardUtil.getInstance().getDebugPath()));if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {deleteDir(context.getExternalCacheDir());}}private 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]));System.out.println("success" + success + "; = " + dir.getAbsolutePath() + File.separator + children[i]);if (!success) {return false;}}}return dir.delete();}/*** * 清除本应用内部缓存(/data/data/com.xxx.xxx/cache) * ** @param context*/public void cleanInternalCache(Context context){deleteFilesByDirectory(context.getCacheDir());}/*** * 清除本应用所有数据库(/data/data/com.xxx.xxx/databases) * ** @param context*/public void cleanDatabases(Context context) {deleteFilesByDirectory(new File("/data/data/"+ context.getPackageName() + "/databases"));}/*** * 清除本应用SharedPreference(/data/data/com.xxx.xxx/shared_prefs) ** @param context*/public void cleanSharedPreference(Context context) {deleteFilesByDirectory(new File("/data/data/"+ context.getPackageName() + "/shared_prefs"));}/*** * 按名字清除本应用数据库 * *** @param context* @param dbName*/public void cleanDatabaseByName(Context context, String dbName) {context.deleteDatabase(dbName);}/*** * 清除/data/data/com.xxx.xxx/files下的内容 * ** @param context*/public void cleanFiles(Context context) {deleteFilesByDirectory(context.getFilesDir());}/*** * 清除外部cache下的内容(/mnt/sdcard/android/data/com.xxx.xxx/cache)* @param context*/public void cleanExternalCache(Context context) {if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {deleteFilesByDirectory(context.getExternalCacheDir());}}/*** * 清除自定义路径下的文件，使用需小心，请不要误删。而且只支持目录下的文件删除 * ** @param filePath* */public void cleanCustomCache(String filePath) {deleteFilesByDirectory(new File(filePath));}/*** * 清除本应用所有的数据 * ** @param context* @param filepath*/public 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);}}/*** * 删除方法 这里只会删除某个文件夹下的文件，如果传入的directory是个文件，将不做处理 * ** @param directory*/private void deleteFilesByDirectory(File directory) {if (directory != null && directory.exists() && directory.isDirectory()){for (File item : directory.listFiles()) {item.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 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;}/*** 删除指定目录下文件及目录** @param deleteThisPath* @param filepath* @return*/public void deleteFolderFile(String filePath, boolean deleteThisPath) {if (!TextUtils.isEmpty(filePath)) {try {File file = new File(filePath);if (file.isDirectory()) {// 如果下面还有文件File files[] = file.listFiles();for (int i = 0; i < files.length; i++) {deleteFolderFile(files[i].getAbsolutePath(), true);}}if (deleteThisPath) {if (!file.isDirectory()) {// 如果是文件，删除file.delete();} else {// 目录if (file.listFiles().length == 0) {// 目录下没有文件或者目录，删除file.delete();}}}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}}/*** 格式化单位** @param size* @return*/public 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";}public String getCacheSize(File file) throws Exception {return getFormatSize(getFolderSize(file));}}
可以根据自己具体情况实现自己的缓存清除，有更好的方法，可以留言交流。
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