//缓存数据的工具类
/** * Copyright (c) 2012-2013, Michael Yang 张忍钰(www.yangfuhai.com). * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.xyw.smartlock.utils; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.io.RandomAccessFile; import java.io.Serializable; import java.util.Collections; import java.util.HashMap; 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; import org.json.JSONArray; import org.json.JSONObject; 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; /** * @author Michael Yang(www.yangfuhai.com) update at 2013.08.07 */ public class ACache { 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 MapmInstanceMap = new HashMap (); private ACacheManager mCache; public static ACache get(Context ctx) { return get(ctx, "ACache"); } public static ACache get(Context ctx, String cacheName) { File f = new File(ctx.getCacheDir(), cacheName); return get(f, MAX_SIZE, MAX_COUNT); } public static ACache get(File cacheDir) { return get(cacheDir, MAX_SIZE, MAX_COUNT); } public static ACache get(Context ctx, long max_zise, int max_count) { File f = new File(ctx.getCacheDir(), "ACache"); return get(f, max_zise, max_count); } public static ACache get(File cacheDir, long max_zise, int max_count) { ACache manager = mInstanceMap.get(cacheDir.getAbsoluteFile() + myPid()); if (manager == null) { manager = new ACache(cacheDir, max_zise, max_count); mInstanceMap.put(cacheDir.getAbsolutePath() + myPid(), manager); } return manager; } private static String myPid() { return "_" + android.os.Process.myPid(); } private ACache(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); } /** * Provides a means to save a cached file before the data are available. * Since writing about the file is complete, and its close method is called, * its contents will be registered in the cache. Example of use: * * ACache cache = new ACache(this) try { OutputStream stream = * cache.put("myFileName") stream.write("some bytes".getBytes()); // now * update cache! stream.close(); } catch(FileNotFoundException e){ * e.printStackTrace() } */ class xFileOutputStream extends FileOutputStream { File file; public xFileOutputStream(File file) throws FileNotFoundException { super(file); this.file = file; } public void close() throws IOException { super.close(); mCache.put(file); } } // ======================================= // ============ 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); } } /** * Cache for a stream * * @param key * the file name. * @return OutputStream stream for writing data. * @throws FileNotFoundException * if the file can not be created. */ public OutputStream put(String key) throws FileNotFoundException { return new xFileOutputStream(mCache.newFile(key)); } /** * * @param key * the file name. * @return (InputStream or null) stream previously saved in cache. * @throws FileNotFoundException * if the file can not be opened */ public InputStream get(String key) throws FileNotFoundException { File file = mCache.get(key); if (!file.exists()) return null; return new FileInputStream(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; } // ======================================= // ============== 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 MaplastUsageDates = Collections.synchronizedMap(new HashMap ()); 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> entries = lastUsageDates.entrySet(); synchronized (lastUsageDates) { for (Entryentry : 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; } BitmapDrawable bd=new BitmapDrawable(bm); bd.setTargetDensity(bm.getDensity()); return new BitmapDrawable(bm); } } }//这个工具类可以存储多种类型数据
//自己写的对象工具类,存储自己需要的字段
package com.xyw.smartlock.utils; import java.io.Serializable; import java.util.Date; public class AcacheUserBean implements Serializable { /** * */ private static final long serialVersionUID = 1L; private String OP_DT; private String OP_NO; private String result; private String BeginTime; private String EndTime; private String OP_NAME; private String AREA_NAME; private String KEYVALUE; private String Area_id; private String ROLE_ID; private String USER_CONTEXT; @Override public String toString() { return "AcacheUserBean{" + "OP_DT='" + OP_DT + '\'' + ", OP_NO='" + OP_NO + '\'' + ", result='" + result + '\'' + ", BeginTime=" + BeginTime + ", EndTime=" + EndTime + ", OP_NAME='" + OP_NAME + '\'' + ", AREA_NAME='" + AREA_NAME + '\'' + ", KEYVALUE='" + KEYVALUE + '\'' + ", Area_id='" + Area_id + '\'' + ", ROLE_ID='" + ROLE_ID + '\'' + ", USER_CONTEXT='" + USER_CONTEXT + '\'' + '}'; } public static long getSerialVersionUID() { return serialVersionUID; } public String getOP_DT() { return OP_DT; } public void setOP_DT(String OP_DT) { this.OP_DT = OP_DT; } public String getOP_NO() { return OP_NO; } public void setOP_NO(String OP_NO) { this.OP_NO = OP_NO; } public String getResult() { return result; } public void setResult(String result) { this.result = result; } public String getBeginTime() { return BeginTime; } public void setBeginTime(String beginTime) { BeginTime = beginTime; } public String getEndTime() { return EndTime; } public void setEndTime(String endTime) { EndTime = endTime; } public String getOP_NAME() { return OP_NAME; } public void setOP_NAME(String OP_NAME) { this.OP_NAME = OP_NAME; } public String getAREA_NAME() { return AREA_NAME; } public void setAREA_NAME(String AREA_NAME) { this.AREA_NAME = AREA_NAME; } public String getKEYVALUE() { return KEYVALUE; } public void setKEYVALUE(String KEYVALUE) { this.KEYVALUE = KEYVALUE; } public String getArea_id() { return Area_id; } public void setArea_id(String area_id) { Area_id = area_id; } public String getROLE_ID() { return ROLE_ID; } public void setROLE_ID(String ROLE_ID) { this.ROLE_ID = ROLE_ID; } public String getUSER_CONTEXT() { return USER_CONTEXT; } public void setUSER_CONTEXT(String USER_CONTEXT) { this.USER_CONTEXT = USER_CONTEXT; } }//存储缓存时的方法
//定义参数
private AcacheUserBean acacheUserBean; private ACache mCache;//oncreate里面定义对象// 缓存数据 mCache = ACache.get(this); acacheUserBean = new AcacheUserBean();//缓存数据//读取缓存的数据acacheUserBean.setOP_DT("OP_DT");// acacheUserBean.setOP_NO("OP_PHONE"); acacheUserBean.setResult("result"); acacheUserBean.setBeginTime("VBEGINTIME"); acacheUserBean.setEndTime("VENDTIME"); acacheUserBean.setOP_NAME("OP_NAME"); acacheUserBean.setAREA_NAME("AREA_NAME"); acacheUserBean.setKEYVALUE("KEYVALUE"); acacheUserBean.setArea_id("AREA_ID"); acacheUserBean.setROLE_ID("ROLE_ID"); acacheUserBean.setUSER_CONTEXT("USER_CONTEXT"); mCache.put("LoginInfo", acacheUserBean);// 缓存文件名称 // // 读取缓存数据 acacheUserBean = (AcacheUserBean) mCache.getAsObject("LoginInfo");
// 缓存数据 mCache = ACache.get(this); acacheUserBean = new AcacheUserBean(); // 读取缓存数据 AcacheUserBean LoginInfo = (AcacheUserBean) mCache.getAsObject("LoginInfo"); user_context_number = LoginInfo.getUSER_CONTEXT().toString();