本文实例为大家分享了Android清除应用缓存的具体代码,供大家参考,具体内容如下
import android.content.Context; import android.os.Environment; import java.io.File; import java.math.BigDecimal; /** * 获取缓存大小并清理缓存 */ public class DataCleanManagerUtils { /** * 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 */ /** * 获取缓存值 */ public static String getTotalCacheSize(Context context) { long cacheSize = getFolderSize(context.getCacheDir()); if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { cacheSize += getFolderSize(context.getExternalCacheDir()); } return getFormatSize(cacheSize); } /** * 清除所有缓存 */ public static void clearAllCache(Context context) { deleteDir(context.getCacheDir()); if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { deleteDir(context.getExternalCacheDir()); //TODO 有网页清理时注意排错,是否存在/data/data/应用package目录下找不到database文件夹的问题 context.deleteDatabase("webview.db"); context.deleteDatabase("webviewCache.db"); } } /** * 删除某个文件 */ private static 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])); if (!success) { return false; } } return dir.delete(); } if (dir != null) { return dir.delete(); } else { return false; } } /** * 获取文件 */ public static long getFolderSize(File file) { long size = 0; if (file != null) { File[] fileList = file.listFiles(); if (fileList != null && fileList.length > 0) { 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(); } } } } return size; } /** * 格式化单位 */ public static String getFormatSize(double size) { double kiloByte = size / 1024; double megaByte = kiloByte / 1024; 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 = BigDecimal.valueOf(teraBytes); return result4.setScale(2,BigDecimal.ROUND_HALF_UP).toPlainString() + "TB"; } }原文链接:https://www.f2er.com/android/534582.html