Android 清除缓存

 * 文 件 名:  DataCleanManager.java 

     * 描    述:  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 

     */  

    package com.archermind.DataClean;  

       

    import java.io.File;  

       

    import android.content.Context;  

    import android.os.Environment;  

       

    /** 

     * 本应用数据清除管理器 

     */  

    public class DataCleanManager {  

        /** 

         * 清除本应用内部缓存(/data/data/com.xxx.xxx/cache) 

         *  

         * @param context 

         */  

        public static 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 static 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 static 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 static void cleanDatabaseByName(Context context, String dbName) {  

            context.deleteDatabase(dbName);  

        }  

       

        /** 

         * 清除/data/data/com.xxx.xxx/files下的内容 

         *  

         * @param context 

         */  

        public static 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 static 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 static void cleanCustomCache(String filePath) {  

            deleteFilesByDirectory(new File(filePath));  

        }  

       

        /** 

         * 清除本应用所有的数据 

         *  

         * @param context 

         * @param filepath 

         */  

        public static void cleanApplicationData(Context context, String... filepath) {  

            cleanInternalCache(context);  

            cleanExternalCache(context);  

            cleanDatabases(context);  

            cleanSharedPreference(context);  

            cleanFiles(context);  

            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 static void deleteFilesByDirectory(File directory) {  

            if (directory != null && directory.exists() && directory.isDirectory()) {  

                for (File item : directory.listFiles()) {  

                    item.delete();  

                }  

            }  

        }  

    }