Android中清除缓存模块

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Android中清除缓存以及本地存储文件

创建一个清除缓存的工具类

public class DataCleanUtils {    /**     * 删除文件     * @param context     */    public static void cleanPath(Context context) {        deleteFilesByDirectory(new File(context.getPackageCodePath()));        deleteFilesByDirectory(new File(context.getCacheDir().getPath()));        deleteFilesByDirectory(new File(context.getExternalCacheDir().getPath()));        deleteFilesByDirectory(new File(context.getFilesDir().getPath()));        deleteFilesByDirectory(new File(context.getObbDir().getPath()));        deleteFilesByDirectory(new File(context.getPackageResourcePath()));        cleanSharedPreference(context);    }    /**     * 获取删除的文件大小     * @param context     * @return     */    public static String getDeleteSiZe(Context context){        return formatFileSize(allSize(context));    }    public static long allSize(Context context) {        return getDirSize(new File(context.getPackageCodePath())) +                getDirSize(new File(context.getCacheDir().getPath())) +                getDirSize(new File(context.getExternalCacheDir().getPath())) +                getDirSize(new File(context.getFilesDir().getPath())) +                getDirSize(new File(context.getObbDir().getPath())) +                getDirSize(new File(context.getPackageResourcePath()));    }    /**     * * 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"));    }    /**     * 获取目录文件大小     *     * @param dir     * @return     */    public static long getDirSize(File dir) {        if (dir == null) {            return 0;        }        if (!dir.isDirectory()) {            return 0;        }        long dirSize = 0;        File[] files = dir.listFiles();        for (File file : files) {            if (file.isFile()) {                dirSize += file.length();            } else if (file.isDirectory()) {                dirSize += file.length();                dirSize += getDirSize(file); // 递归调用继续统计            }        }        return dirSize;    }    /**     * 递归删除文件和文件夹     *     * @param file 要删除的根目录     */    public static void deleteFilesByDirectory(File file) {        if (file.isFile()) {            file.delete();            return;        }        if (file.isDirectory()) {            File[] childFile = file.listFiles();            if (childFile == null || childFile.length == 0) {                file.delete();                return;            }            for (File f : childFile) {                deleteFilesByDirectory(f);            }            file.delete();        }    }    /**     * 转换文件大小     *     * @param fileS     * @return B/KB/MB/GB     */    public static String formatFileSize(long fileS) {        java.text.DecimalFormat df = new java.text.DecimalFormat("#.00");        String fileSizeString = "";        if (fileS < 1024) {            fileSizeString = df.format((double) fileS) + "B";        } else if (fileS < 1048576) {            fileSizeString = df.format((double) fileS / 1024) + "KB";        } else if (fileS < 1073741824) {            fileSizeString = df.format((double) fileS / 1048576) + "MB";        } else {            fileSizeString = df.format((double) fileS / 1073741824) + "G";        }        return fileSizeString;    }}

工具类的使用demo（防止空间获取数据过大，放在子线程中操作）

 private void cleanData() {        showProgressDialog("","数据清理中",false);        new Thread(new Runnable() {            @Override            public void run() {                final long l = DataCleanUtils.allSize(getApplicationContext());                DataCleanUtils.cleanPath(getApplicationContext());               runOnUiThread(new Runnable() {                   @Override                   public void run() {                       if(l > DataCleanUtils.allSize(getApplicationContext())){                           dismissProgressDialog();                           long freeSize = l - DataCleanUtils.allSize(getApplicationContext());                           Toast.makeText(MainActivity.this, "释放了"+DataCleanUtils.formatFileSize(freeSize)+"空间", Toast.LENGTH_LONG).show();                       }else{                           dismissProgressDialog();                           Toast.makeText(MainActivity.this, "空间已经清理干净", Toast.LENGTH_SHORT).show();                       }                   }               });            }        }).start();        dismissProgressDialog();    }

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