content: package cn.com.superLei.aoparms.common.utils;
  
  import android.content.Context;
  import android.graphics.Bitmap;
  import android.graphics.BitmapFactory;
  import android.graphics.Canvas;
  import android.graphics.PixelFormat;
  import android.graphics.drawable.BitmapDrawable;
  import android.graphics.drawable.Drawable;
  import android.util.Log;
  
  import org.json.JSONArray;
  import org.json.JSONObject;
  
  import java.io.BufferedReader;
  import java.io.BufferedWriter;
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.FileReader;
  import java.io.FileWriter;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.io.RandomAccessFile;
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Set;
  import java.util.concurrent.atomic.AtomicInteger;
  import java.util.concurrent.atomic.AtomicLong;
  
  /**
   * description $desc$
   * created by jerry on 2019/5/29.
   */
  public class ArmsCache {
  
      private static final String TAG = "ArmsCache";
      public static final int TIME_HOUR = 60 * 60;
      public static final int TIME_DAY = TIME_HOUR * 24;
      private static final int MAX_SIZE = 1000 * 1000 * 50; // 50 mb
      private static final int MAX_COUNT = Integer.MAX_VALUE; // 不限制存放数据的数量
      private static Map<String, ArmsCache> mInstanceMap = new HashMap<String, ArmsCache>();
      private ACacheManager mCache;
  
      public static ArmsCache get(Context ctx) {
          return get(ctx, "ArmsCache");
      }
  
      public static ArmsCache get(Context ctx, String cacheName) {
          File f = new File(ctx.getCacheDir(), cacheName);
          return get(f, MAX_SIZE, MAX_COUNT);
      }
  
      public static ArmsCache get(File cacheDir) {
          return get(cacheDir, MAX_SIZE, MAX_COUNT);
      }
  
      public static ArmsCache get(Context ctx, long max_zise, int max_count) {
          File f = new File(ctx.getCacheDir(), "ArmsCache");
          return get(f, max_zise, max_count);
      }
  
      public static ArmsCache get(File cacheDir, long max_zise, int max_count) {
          ArmsCache manager = mInstanceMap.get(cacheDir.getAbsoluteFile() + myPid());
          if (manager == null) {
              manager = new ArmsCache(cacheDir, max_zise, max_count);
              mInstanceMap.put(cacheDir.getAbsolutePath() + myPid(), manager);
          }
          return manager;
      }
  
      private static String myPid() {
          return "_" + android.os.Process.myPid();
      }
  
      private ArmsCache(File cacheDir, long max_size, int max_count) {
          if (!cacheDir.exists() && !cacheDir.mkdirs()) {
              throw new RuntimeException("can't make dirs in "
                      + cacheDir.getAbsolutePath());
          }
          mCache = new ACacheManager(cacheDir, max_size, max_count);
      }
  
      // =======================================
      // ============ String数据 读写 ==============
      // =======================================
      /**
       * 保存 String数据 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的String数据
       */
      public void put(String key, String value) {
          File file = mCache.newFile(key);
          BufferedWriter out = null;
          try {
              out = new BufferedWriter(new FileWriter(file), 1024);
              out.write(value);
          } catch (IOException e) {
              e.printStackTrace();
          } finally {
              if (out != null) {
                  try {
                      out.flush();
                      out.close();
                  } catch (IOException e) {
                      e.printStackTrace();
                  }
              }
              mCache.put(file);
          }
      }
  
      /**
       * 保存 String数据 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的String数据
       * @param saveTime
       *            保存的时间，单位：秒
       */
      public void put(String key, String value, int saveTime) {
          put(key, Utils.newStringWithDateInfo(saveTime, value));
      }
  
      /**
       * 读取 String数据
       *
       * @param key
       * @return String 数据
       */
      public String getAsString(String key) {
          File file = mCache.get(key);
          if (!file.exists())
              return null;
          boolean removeFile = false;
          BufferedReader in = null;
          try {
              in = new BufferedReader(new FileReader(file));
              String readString = "";
              String currentLine;
              while ((currentLine = in.readLine()) != null) {
                  readString += currentLine;
              }
              if (!Utils.isDue(readString)) {
                  return Utils.clearDateInfo(readString);
              } else {
                  removeFile = true;
                  return null;
              }
          } catch (IOException e) {
              e.printStackTrace();
              return null;
          } finally {
              if (in != null) {
                  try {
                      in.close();
                  } catch (IOException e) {
                      e.printStackTrace();
                  }
              }
              if (removeFile)
                  remove(key);
          }
      }
  
      // =======================================
      // ============= JSONObject 数据 读写 ==============
      // =======================================
      /**
       * 保存 JSONObject数据 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的JSON数据
       */
      public void put(String key, JSONObject value) {
          put(key, value.toString());
      }
  
      /**
       * 保存 JSONObject数据 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的JSONObject数据
       * @param saveTime
       *            保存的时间，单位：秒
       */
      public void put(String key, JSONObject value, int saveTime) {
          put(key, value.toString(), saveTime);
      }
  
      /**
       * 读取JSONObject数据
       *
       * @param key
       * @return JSONObject数据
       */
      public JSONObject getAsJSONObject(String key) {
          String JSONString = getAsString(key);
          try {
              JSONObject obj = new JSONObject(JSONString);
              return obj;
          } catch (Exception e) {
              e.printStackTrace();
              return null;
          }
      }
  
      // =======================================
      // ============ JSONArray 数据 读写 =============
      // =======================================
      /**
       * 保存 JSONArray数据 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的JSONArray数据
       */
      public void put(String key, JSONArray value) {
          put(key, value.toString());
      }
  
      /**
       * 保存 JSONArray数据 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的JSONArray数据
       * @param saveTime
       *            保存的时间，单位：秒
       */
      public void put(String key, JSONArray value, int saveTime) {
          put(key, value.toString(), saveTime);
      }
  
      /**
       * 读取JSONArray数据
       *
       * @param key
       * @return JSONArray数据
       */
      public JSONArray getAsJSONArray(String key) {
          String JSONString = getAsString(key);
          try {
              JSONArray obj = new JSONArray(JSONString);
              return obj;
          } catch (Exception e) {
              e.printStackTrace();
              return null;
          }
      }
  
      // =======================================
      // ============== byte 数据 读写 =============
      // =======================================
      /**
       * 保存 byte数据 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的数据
       */
      public void put(String key, byte[] value) {
          File file = mCache.newFile(key);
          FileOutputStream out = null;
          try {
              out = new FileOutputStream(file);
              out.write(value);
          } catch (Exception e) {
              e.printStackTrace();
          } finally {
              if (out != null) {
                  try {
                      out.flush();
                      out.close();
                  } catch (IOException e) {
                      e.printStackTrace();
                  }
              }
              mCache.put(file);
          }
      }
  
      /**
       * 保存 byte数据 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的数据
       * @param saveTime
       *            保存的时间，单位：秒
       */
      public void put(String key, byte[] value, int saveTime) {
          put(key, Utils.newByteArrayWithDateInfo(saveTime, value));
      }
  
      /**
       * 获取 byte 数据
       *
       * @param key
       * @return byte 数据
       */
      public byte[] getAsBinary(String key) {
          RandomAccessFile RAFile = null;
          boolean removeFile = false;
          try {
              File file = mCache.get(key);
              if (!file.exists())
                  return null;
              RAFile = new RandomAccessFile(file, "r");
              byte[] byteArray = new byte[(int) RAFile.length()];
              RAFile.read(byteArray);
              if (!Utils.isDue(byteArray)) {
                  return Utils.clearDateInfo(byteArray);
              } else {
                  removeFile = true;
                  return null;
              }
          } catch (Exception e) {
              e.printStackTrace();
              return null;
          } finally {
              if (RAFile != null) {
                  try {
                      RAFile.close();
                  } catch (IOException e) {
                      e.printStackTrace();
                  }
              }
              if (removeFile)
                  remove(key);
          }
      }
  
      // =======================================
      // ============= 序列化 数据 读写 ===============
      // =======================================
      /**
       * 保存 Serializable数据 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的value
       */
      public void put(String key, Serializable value) {
          put(key, value, -1);
      }
  
      /**
       * 保存 Serializable数据到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的value
       * @param saveTime
       *            保存的时间，单位：秒
       */
      public void put(String key, Serializable value, int saveTime) {
          ByteArrayOutputStream baos = null;
          ObjectOutputStream oos = null;
          try {
              baos = new ByteArrayOutputStream();
              oos = new ObjectOutputStream(baos);
              oos.writeObject(value);
              byte[] data = baos.toByteArray();
              if (saveTime != -1) {
                  put(key, data, saveTime);
              } else {
                  put(key, data);
              }
          } catch (Exception e) {
              e.printStackTrace();
          } finally {
              try {
                  oos.close();
              } catch (IOException e) {
              }
          }
      }
  
      /**
       * 读取 Serializable数据
       *
       * @param key
       * @return Serializable 数据
       */
      public Object getAsObject(String key) {
          byte[] data = getAsBinary(key);
          if (data != null) {
              ByteArrayInputStream bais = null;
              ObjectInputStream ois = null;
              try {
                  bais = new ByteArrayInputStream(data);
                  ois = new ObjectInputStream(bais);
                  Object reObject = ois.readObject();
                  return reObject;
              } catch (Exception e) {
                  e.printStackTrace();
                  return null;
              } finally {
                  try {
                      if (bais != null)
                          bais.close();
                  } catch (IOException e) {
                      e.printStackTrace();
                  }
                  try {
                      if (ois != null)
                          ois.close();
                  } catch (IOException e) {
                      e.printStackTrace();
                  }
              }
          }
          return null;
  
      }
  
      /**
       * 获取集合
       * @param key
       * @param clazz
       * @param <T> 泛型对象
       * @return
       * @throws ClassCastException
       */
      public <T>ArrayList<T> getAsList(String key, Class<T> clazz) throws ClassCastException {
          Object object = getAsObject(key);
          if (object != null){
              if (object instanceof List){
                  ArrayList<T> arrayList = (ArrayList<T>) object;
                  if (arrayList.size() > 0){
                      T t = arrayList.get(0);
                      if (t.getClass() == clazz){
                          return arrayList;
                      }else {
                          Log.e(TAG, "Clazz Type error");
                          throw new ClassCastException("Clazz Type error");
                      }
                  }
              }else{
                  Log.e(TAG, "Value is not ArrayList Type");
                  throw new ClassCastException("Value is not ArrayList Type");
              }
          }
          return null;
      }
  
      // =======================================
      // ============== bitmap 数据 读写 =============
      // =======================================
      /**
       * 保存 bitmap 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的bitmap数据
       */
      public void put(String key, Bitmap value) {
          put(key, Utils.Bitmap2Bytes(value));
      }
  
      /**
       * 保存 bitmap 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的 bitmap 数据
       * @param saveTime
       *            保存的时间，单位：秒
       */
      public void put(String key, Bitmap value, int saveTime) {
          put(key, Utils.Bitmap2Bytes(value), saveTime);
      }
  
      /**
       * 读取 bitmap 数据
       *
       * @param key
       * @return bitmap 数据
       */
      public Bitmap getAsBitmap(String key) {
          if (getAsBinary(key) == null) {
              return null;
          }
          return Utils.Bytes2Bimap(getAsBinary(key));
      }
  
      // =======================================
      // ============= drawable 数据 读写 =============
      // =======================================
      /**
       * 保存 drawable 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的drawable数据
       */
      public void put(String key, Drawable value) {
          put(key, Utils.drawable2Bitmap(value));
      }
  
      /**
       * 保存 drawable 到 缓存中
       *
       * @param key
       *            保存的key
       * @param value
       *            保存的 drawable 数据
       * @param saveTime
       *            保存的时间，单位：秒
       */
      public void put(String key, Drawable value, int saveTime) {
          put(key, Utils.drawable2Bitmap(value), saveTime);
      }
  
      /**
       * 读取 Drawable 数据
       *
       * @param key
       * @return Drawable 数据
       */
      public Drawable getAsDrawable(String key) {
          if (getAsBinary(key) == null) {
              return null;
          }
          return Utils.bitmap2Drawable(Utils.Bytes2Bimap(getAsBinary(key)));
      }
  
      /**
       * 获取缓存文件
       *
       * @param key
       * @return value 缓存的文件
       */
      public File file(String key) {
          File f = mCache.newFile(key);
          if (f.exists())
              return f;
          return null;
      }
  
      /**
       * 移除某个key
       *
       * @param key
       * @return 是否移除成功
       */
      public boolean remove(String key) {
          return mCache.remove(key);
      }
  
      /**
       * 清除所有数据
       */
      public void clear() {
          mCache.clear();
      }
  
      /**
       * @title 缓存管理器
       * @author 杨福海（michael） www.yangfuhai.com
       * @version 1.0
       */
      public class ACacheManager {
          private final AtomicLong cacheSize;
          private final AtomicInteger cacheCount;
          private final long sizeLimit;
          private final int countLimit;
          private final Map<File, Long> lastUsageDates = Collections
                  .synchronizedMap(new HashMap<File, Long>());
          protected File cacheDir;
  
          private ACacheManager(File cacheDir, long sizeLimit, int countLimit) {
              this.cacheDir = cacheDir;
              this.sizeLimit = sizeLimit;
              this.countLimit = countLimit;
              cacheSize = new AtomicLong();
              cacheCount = new AtomicInteger();
              calculateCacheSizeAndCacheCount();
          }
  
          /**
           * 计算 cacheSize和cacheCount
           */
          private void calculateCacheSizeAndCacheCount() {
              new Thread(new Runnable() {
                  @Override
                  public void run() {
                      int size = 0;
                      int count = 0;
                      File[] cachedFiles = cacheDir.listFiles();
                      if (cachedFiles != null) {
                          for (File cachedFile : cachedFiles) {
                              size += calculateSize(cachedFile);
                              count += 1;
                              lastUsageDates.put(cachedFile,
                                      cachedFile.lastModified());
                          }
                          cacheSize.set(size);
                          cacheCount.set(count);
                      }
                  }
              }).start();
          }
  
          private void put(File file) {
              int curCacheCount = cacheCount.get();
              while (curCacheCount + 1 > countLimit) {
                  long freedSize = removeNext();
                  cacheSize.addAndGet(-freedSize);
  
                  curCacheCount = cacheCount.addAndGet(-1);
              }
              cacheCount.addAndGet(1);
  
              long valueSize = calculateSize(file);
              long curCacheSize = cacheSize.get();
              while (curCacheSize + valueSize > sizeLimit) {
                  long freedSize = removeNext();
                  curCacheSize = cacheSize.addAndGet(-freedSize);
              }
              cacheSize.addAndGet(valueSize);
  
              Long currentTime = System.currentTimeMillis();
              file.setLastModified(currentTime);
              lastUsageDates.put(file, currentTime);
          }
  
          private File get(String key) {
              File file = newFile(key);
              Long currentTime = System.currentTimeMillis();
              file.setLastModified(currentTime);
              lastUsageDates.put(file, currentTime);
  
              return file;
          }
  
          private File newFile(String key) {
              return new File(cacheDir, key.hashCode() + "");
          }
  
          private boolean remove(String key) {
              File image = get(key);
              return image.delete();
          }
  
          private void clear() {
              lastUsageDates.clear();
              cacheSize.set(0);
              File[] files = cacheDir.listFiles();
              if (files != null) {
                  for (File f : files) {
                      f.delete();
                  }
              }
          }
  
          /**
           * 移除旧的文件
           *
           * @return
           */
          private long removeNext() {
              if (lastUsageDates.isEmpty()) {
                  return 0;
              }
  
              Long oldestUsage = null;
              File mostLongUsedFile = null;
              Set<Entry<File, Long>> entries = lastUsageDates.entrySet();
              synchronized (lastUsageDates) {
                  for (Entry<File, Long> entry : entries) {
                      if (mostLongUsedFile == null) {
                          mostLongUsedFile = entry.getKey();
                          oldestUsage = entry.getValue();
                      } else {
                          Long lastValueUsage = entry.getValue();
                          if (lastValueUsage < oldestUsage) {
                              oldestUsage = lastValueUsage;
                              mostLongUsedFile = entry.getKey();
                          }
                      }
                  }
              }
  
              long fileSize = calculateSize(mostLongUsedFile);
              if (mostLongUsedFile.delete()) {
                  lastUsageDates.remove(mostLongUsedFile);
              }
              return fileSize;
          }
  
          private long calculateSize(File file) {
              return file.length();
          }
      }
  
      /**
       * @title 时间计算工具类
       * @author 杨福海（michael） www.yangfuhai.com
       * @version 1.0
       */
      private static class Utils {
  
          /**
           * 判断缓存的String数据是否到期
           *
           * @param str
           * @return true：到期了 false：还没有到期
           */
          private static boolean isDue(String str) {
              return isDue(str.getBytes());
          }
  
          /**
           * 判断缓存的byte数据是否到期
           *
           * @param data
           * @return true：到期了 false：还没有到期
           */
          private static boolean isDue(byte[] data) {
              String[] strs = getDateInfoFromDate(data);
              if (strs != null && strs.length == 2) {
                  String saveTimeStr = strs[0];
                  while (saveTimeStr.startsWith("0")) {
                      saveTimeStr = saveTimeStr
                              .substring(1, saveTimeStr.length());
                  }
                  long saveTime = Long.valueOf(saveTimeStr);
                  long deleteAfter = Long.valueOf(strs[1]);
                  if (System.currentTimeMillis() > saveTime + deleteAfter * 1000) {
                      return true;
                  }
              }
              return false;
          }
  
          private static String newStringWithDateInfo(int second, String strInfo) {
              return createDateInfo(second) + strInfo;
          }
  
          private static byte[] newByteArrayWithDateInfo(int second, byte[] data2) {
              byte[] data1 = createDateInfo(second).getBytes();
              byte[] retdata = new byte[data1.length + data2.length];
              System.arraycopy(data1, 0, retdata, 0, data1.length);
              System.arraycopy(data2, 0, retdata, data1.length, data2.length);
              return retdata;
          }
  
          private static String clearDateInfo(String strInfo) {
              if (strInfo != null && hasDateInfo(strInfo.getBytes())) {
                  strInfo = strInfo.substring(strInfo.indexOf(mSeparator) + 1,
                          strInfo.length());
              }
              return strInfo;
          }
  
          private static byte[] clearDateInfo(byte[] data) {
              if (hasDateInfo(data)) {
                  return copyOfRange(data, indexOf(data, mSeparator) + 1,
                          data.length);
              }
              return data;
          }
  
          private static boolean hasDateInfo(byte[] data) {
              return data != null && data.length > 15 && data[13] == '-'
                      && indexOf(data, mSeparator) > 14;
          }
  
          private static String[] getDateInfoFromDate(byte[] data) {
              if (hasDateInfo(data)) {
                  String saveDate = new String(copyOfRange(data, 0, 13));
                  String deleteAfter = new String(copyOfRange(data, 14,
                          indexOf(data, mSeparator)));
                  return new String[] { saveDate, deleteAfter };
              }
              return null;
          }
  
          private static int indexOf(byte[] data, char c) {
              for (int i = 0; i < data.length; i++) {
                  if (data[i] == c) {
                      return i;
                  }
              }
              return -1;
          }
  
          private static byte[] copyOfRange(byte[] original, int from, int to) {
              int newLength = to - from;
              if (newLength < 0)
                  throw new IllegalArgumentException(from + " > " + to);
              byte[] copy = new byte[newLength];
              System.arraycopy(original, from, copy, 0,
                      Math.min(original.length - from, newLength));
              return copy;
          }
  
          private static final char mSeparator = ' ';
  
          private static String createDateInfo(int second) {
              String currentTime = System.currentTimeMillis() + "";
              while (currentTime.length() < 13) {
                  currentTime = "0" + currentTime;
              }
              return currentTime + "-" + second + mSeparator;
          }
  
          /*
           * Bitmap → byte[]
           */
          private static byte[] Bitmap2Bytes(Bitmap bm) {
              if (bm == null) {
                  return null;
              }
              ByteArrayOutputStream baos = new ByteArrayOutputStream();
              bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
              return baos.toByteArray();
          }
  
          /*
           * byte[] → Bitmap
           */
          private static Bitmap Bytes2Bimap(byte[] b) {
              if (b.length == 0) {
                  return null;
              }
              return BitmapFactory.decodeByteArray(b, 0, b.length);
          }
  
          /*
           * Drawable → Bitmap
           */
          private static Bitmap drawable2Bitmap(Drawable drawable) {
              if (drawable == null) {
                  return null;
              }
              // 取 drawable 的长宽
              int w = drawable.getIntrinsicWidth();
              int h = drawable.getIntrinsicHeight();
              // 取 drawable 的颜色格式
              Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
                      : Bitmap.Config.RGB_565;
              // 建立对应 bitmap
              Bitmap bitmap = Bitmap.createBitmap(w, h, config);
              // 建立对应 bitmap 的画布
              Canvas canvas = new Canvas(bitmap);
              drawable.setBounds(0, 0, w, h);
              // 把 drawable 内容画到画布中
              drawable.draw(canvas);
              return bitmap;
          }
  
          /*
           * Bitmap → Drawable
           */
          @SuppressWarnings("deprecation")
          private static Drawable bitmap2Drawable(Bitmap bm) {
              if (bm == null) {
                  return null;
              }
              return new BitmapDrawable(bm);
          }
      }
  
  }
  