/**
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* Copyright (c) 2012-2013, Michael Yang 杨福海 (www.yangfuhai.com).
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* <p>
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* <p>
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* http://www.apache.org/licenses/LICENSE-2.0
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.zhaoyang.driver.utils.Cache;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.Canvas;
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import android.graphics.PixelFormat;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.text.TextUtils;
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import com.zhaoyang.driver.base.MyApplication;
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import org.json.JSONArray;
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import org.json.JSONObject;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.FileReader;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.io.RandomAccessFile;
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import java.io.Serializable;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Set;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.atomic.AtomicLong;
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/**
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* @author Michael Yang（www.yangfuhai.com） update at 2013.08.07
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*/
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public class CacheUtil {
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public static final int TIME_HOUR = 60 * 60;
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public static final int TIME_DAY = TIME_HOUR * 24;
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private static final int MAX_SIZE = 1000 * 1000 * 50; // 50 mb
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private static final int MAX_COUNT = Integer.MAX_VALUE; // 不限制存放数据的数量
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private static Map<String, CacheUtil> mInstanceMap = new HashMap<String, CacheUtil>();
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private ACacheManager mCache;
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public static CacheUtil get() {
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return get(MyApplication.Companion.getInstance(), "CacheUtil");
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}
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public static CacheUtil get(Context ctx) {
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return get(ctx, "CacheUtil");
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}
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public static CacheUtil get(Context ctx, String cacheName) {
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File f = new File(ctx.getCacheDir(), cacheName);
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return get(f, MAX_SIZE, MAX_COUNT);
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}
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public static CacheUtil get(File cacheDir) {
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return get(cacheDir, MAX_SIZE, MAX_COUNT);
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}
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public static CacheUtil get(Context ctx, long max_zise, int max_count) {
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File f = new File(ctx.getCacheDir(), "CacheUtil");
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return get(f, max_zise, max_count);
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}
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public static CacheUtil get(File cacheDir, long max_zise, int max_count) {
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CacheUtil manager = mInstanceMap.get(cacheDir.getAbsoluteFile() + myPid());
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if (manager == null) {
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manager = new CacheUtil(cacheDir, max_zise, max_count);
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mInstanceMap.put(cacheDir.getAbsolutePath() + myPid(), manager);
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}
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return manager;
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}
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private static String myPid() {
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return "_" + android.os.Process.myPid();
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}
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private CacheUtil(File cacheDir, long max_size, int max_count) {
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if (!cacheDir.exists() && !cacheDir.mkdirs()) {
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throw new RuntimeException("can't make dirs in "
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+ cacheDir.getAbsolutePath());
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}
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mCache = new ACacheManager(cacheDir, max_size, max_count);
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}
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// =======================================
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// ============ String数据 读写 ==============
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// =======================================
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/**
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* 保存 String数据 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的String数据
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*/
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public void put(String key, String value) {
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if (TextUtils.isEmpty(value)) {
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remove(key);
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return;
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}
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File file = mCache.newFile(key);
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BufferedWriter out = null;
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try {
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out = new BufferedWriter(new FileWriter(file), 1024);
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out.write(value);
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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if (out != null) {
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try {
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out.flush();
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out.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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mCache.put(file);
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}
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}
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/**
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* 保存 String数据 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的String数据
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* @param saveTime
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* 保存的时间，单位：秒
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*/
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public void put(String key, String value, int saveTime) {
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put(key, Utils.newStringWithDateInfo(saveTime, value));
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}
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/**
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* 读取 String数据
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*
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* @param key
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* @return String 数据
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*/
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public String getAsString(String key) {
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File file = mCache.get(key);
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if (!file.exists())
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return null;
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boolean removeFile = false;
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BufferedReader in = null;
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try {
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in = new BufferedReader(new FileReader(file));
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String readString = "";
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String currentLine;
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while ((currentLine = in.readLine()) != null) {
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readString += currentLine;
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}
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if (!Utils.isDue(readString)) {
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return Utils.clearDateInfo(readString);
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} else {
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removeFile = true;
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return null;
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}
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} catch (IOException e) {
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e.printStackTrace();
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return null;
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} finally {
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if (in != null) {
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try {
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in.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if (removeFile)
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remove(key);
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}
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}
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// =======================================
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// ============= JSONObject 数据 读写 ==============
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// =======================================
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/**
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* 保存 JSONObject数据 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的JSON数据
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*/
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public void put(String key, JSONObject value) {
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put(key, value.toString());
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}
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/**
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* 保存 JSONObject数据 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的JSONObject数据
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* @param saveTime
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* 保存的时间，单位：秒
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*/
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public void put(String key, JSONObject value, int saveTime) {
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put(key, value.toString(), saveTime);
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}
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/**
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* 读取JSONObject数据
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*
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* @param key
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* @return JSONObject数据
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*/
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public JSONObject getAsJSONObject(String key) {
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String JSONString = getAsString(key);
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try {
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JSONObject obj = new JSONObject(JSONString);
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return obj;
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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}
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}
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// =======================================
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// ============ JSONArray 数据 读写 =============
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// =======================================
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/**
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* 保存 JSONArray数据 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的JSONArray数据
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*/
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public void put(String key, JSONArray value) {
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put(key, value.toString());
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}
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/**
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* 保存 JSONArray数据 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的JSONArray数据
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* @param saveTime
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* 保存的时间，单位：秒
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*/
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public void put(String key, JSONArray value, int saveTime) {
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put(key, value.toString(), saveTime);
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}
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/**
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* 读取JSONArray数据
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*
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* @param key
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* @return JSONArray数据
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*/
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public JSONArray getAsJSONArray(String key) {
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String JSONString = getAsString(key);
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try {
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JSONArray obj = new JSONArray(JSONString);
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return obj;
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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}
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}
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// =======================================
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// ============== byte 数据 读写 =============
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// =======================================
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/**
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* 保存 byte数据 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的数据
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*/
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public void put(String key, byte[] value) {
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File file = mCache.newFile(key);
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FileOutputStream out = null;
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try {
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out = new FileOutputStream(file);
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out.write(value);
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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if (out != null) {
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try {
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out.flush();
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out.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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mCache.put(file);
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}
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}
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/**
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* 保存 byte数据 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的数据
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* @param saveTime
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* 保存的时间，单位：秒
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*/
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public void put(String key, byte[] value, int saveTime) {
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put(key, Utils.newByteArrayWithDateInfo(saveTime, value));
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}
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/**
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* 获取 byte 数据
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*
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* @param key
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* @return byte 数据
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*/
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public byte[] getAsBinary(String key) {
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RandomAccessFile RAFile = null;
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boolean removeFile = false;
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try {
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File file = mCache.get(key);
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if (!file.exists())
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return null;
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RAFile = new RandomAccessFile(file, "r");
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byte[] byteArray = new byte[(int) RAFile.length()];
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RAFile.read(byteArray);
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if (!Utils.isDue(byteArray)) {
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return Utils.clearDateInfo(byteArray);
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} else {
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removeFile = true;
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return null;
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}
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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} finally {
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if (RAFile != null) {
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try {
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RAFile.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if (removeFile)
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remove(key);
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}
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}
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// =======================================
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// ============= 序列化 数据 读写 ===============
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// =======================================
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/**
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* 保存 Serializable数据 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的value
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*/
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public void put(String key, Serializable value) {
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put(key, value, -1);
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}
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/**
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* 保存 Serializable数据到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的value
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* @param saveTime
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* 保存的时间，单位：秒
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*/
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public void put(String key, Serializable value, int saveTime) {
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ByteArrayOutputStream baos = null;
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ObjectOutputStream oos = null;
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try {
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baos = new ByteArrayOutputStream();
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oos = new ObjectOutputStream(baos);
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oos.writeObject(value);
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byte[] data = baos.toByteArray();
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if (saveTime != -1) {
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put(key, data, saveTime);
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} else {
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put(key, data);
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}
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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try {
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oos.close();
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} catch (IOException e) {
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}
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}
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}
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/**
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* 读取 Serializable数据
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*
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* @param key
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* @return Serializable 数据
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*/
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public Object getAsObject(String key) {
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byte[] data = getAsBinary(key);
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if (data != null) {
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ByteArrayInputStream bais = null;
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ObjectInputStream ois = null;
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try {
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bais = new ByteArrayInputStream(data);
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ois = new ObjectInputStream(bais);
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Object reObject = ois.readObject();
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return reObject;
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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} finally {
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try {
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if (bais != null)
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bais.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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try {
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if (ois != null)
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ois.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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return null;
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}
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// =======================================
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// ============== bitmap 数据 读写 =============
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// =======================================
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/**
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* 保存 bitmap 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的bitmap数据
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*/
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public void put(String key, Bitmap value) {
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put(key, Utils.Bitmap2Bytes(value));
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}
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/**
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* 保存 bitmap 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的 bitmap 数据
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* @param saveTime
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* 保存的时间，单位：秒
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*/
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public void put(String key, Bitmap value, int saveTime) {
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put(key, Utils.Bitmap2Bytes(value), saveTime);
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}
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/**
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* 读取 bitmap 数据
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*
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* @param key
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* @return bitmap 数据
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*/
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public Bitmap getAsBitmap(String key) {
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if (getAsBinary(key) == null) {
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return null;
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}
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return Utils.Bytes2Bimap(getAsBinary(key));
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}
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// =======================================
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// ============= drawable 数据 读写 =============
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// =======================================
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/**
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* 保存 drawable 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的drawable数据
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*/
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public void put(String key, Drawable value) {
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put(key, Utils.drawable2Bitmap(value));
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}
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/**
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* 保存 drawable 到 缓存中
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*
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* @param key
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* 保存的key
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* @param value
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* 保存的 drawable 数据
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* @param saveTime
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* 保存的时间，单位：秒
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*/
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public void put(String key, Drawable value, int saveTime) {
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put(key, Utils.drawable2Bitmap(value), saveTime);
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}
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/**
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* 读取 Drawable 数据
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*
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* @param key
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* @return Drawable 数据
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*/
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public Drawable getAsDrawable(String key) {
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if (getAsBinary(key) == null) {
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return null;
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}
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return Utils.bitmap2Drawable(Utils.Bytes2Bimap(getAsBinary(key)));
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}
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/**
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* 获取缓存文件
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*
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* @param key
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* @return value 缓存的文件
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*/
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public File file(String key) {
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File f = mCache.newFile(key);
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if (f.exists())
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return f;
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return null;
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}
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/**
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* 移除某个key
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*
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* @param key
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* @return 是否移除成功
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*/
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public boolean remove(String key) {
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return mCache.remove(key);
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}
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/**
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* 清除所有数据
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*/
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public void clear() {
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mCache.clear();
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}
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/**
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* @title 缓存管理器
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* @author 杨福海（michael） www.yangfuhai.com
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* @version 1.0
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*/
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public class ACacheManager {
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private final AtomicLong cacheSize;
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private final AtomicInteger cacheCount;
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private final long sizeLimit;
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private final int countLimit;
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private final Map<File, Long> lastUsageDates = Collections
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.synchronizedMap(new HashMap<File, Long>());
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protected File cacheDir;
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private ACacheManager(File cacheDir, long sizeLimit, int countLimit) {
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this.cacheDir = cacheDir;
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this.sizeLimit = sizeLimit;
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this.countLimit = countLimit;
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cacheSize = new AtomicLong();
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cacheCount = new AtomicInteger();
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calculateCacheSizeAndCacheCount();
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}
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/**
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* 计算 cacheSize和cacheCount
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*/
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private void calculateCacheSizeAndCacheCount() {
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new Thread(new Runnable() {
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@Override
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public void run() {
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int size = 0;
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int count = 0;
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File[] cachedFiles = cacheDir.listFiles();
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if (cachedFiles != null) {
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for (File cachedFile : cachedFiles) {
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size += calculateSize(cachedFile);
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count += 1;
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lastUsageDates.put(cachedFile,
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cachedFile.lastModified());
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}
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cacheSize.set(size);
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cacheCount.set(count);
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}
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}
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}).start();
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}
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private void put(File file) {
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int curCacheCount = cacheCount.get();
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while (curCacheCount + 1 > countLimit) {
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long freedSize = removeNext();
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cacheSize.addAndGet(-freedSize);
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curCacheCount = cacheCount.addAndGet(-1);
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}
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cacheCount.addAndGet(1);
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long valueSize = calculateSize(file);
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long curCacheSize = cacheSize.get();
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while (curCacheSize + valueSize > sizeLimit) {
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long freedSize = removeNext();
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curCacheSize = cacheSize.addAndGet(-freedSize);
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}
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cacheSize.addAndGet(valueSize);
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Long currentTime = System.currentTimeMillis();
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file.setLastModified(currentTime);
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lastUsageDates.put(file, currentTime);
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}
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private File get(String key) {
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File file = newFile(key);
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Long currentTime = System.currentTimeMillis();
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file.setLastModified(currentTime);
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lastUsageDates.put(file, currentTime);
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return file;
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}
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private File newFile(String key) {
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return new File(cacheDir, key.hashCode() + "");
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}
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private boolean remove(String key) {
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File image = get(key);
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return image.delete();
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}
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private void clear() {
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lastUsageDates.clear();
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cacheSize.set(0);
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File[] files = cacheDir.listFiles();
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if (files != null) {
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for (File f : files) {
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f.delete();
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}
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}
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}
|
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/**
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* 移除旧的文件
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*
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* @return
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*/
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private long removeNext() {
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if (lastUsageDates.isEmpty()) {
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return 0;
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}
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Long oldestUsage = null;
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File mostLongUsedFile = null;
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Set<Entry<File, Long>> entries = lastUsageDates.entrySet();
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synchronized (lastUsageDates) {
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for (Entry<File, Long> entry : entries) {
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if (mostLongUsedFile == null) {
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mostLongUsedFile = entry.getKey();
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oldestUsage = entry.getValue();
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} else {
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Long lastValueUsage = entry.getValue();
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if (lastValueUsage < oldestUsage) {
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oldestUsage = lastValueUsage;
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mostLongUsedFile = entry.getKey();
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}
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}
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}
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}
|
|
long fileSize = calculateSize(mostLongUsedFile);
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if (mostLongUsedFile.delete()) {
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lastUsageDates.remove(mostLongUsedFile);
|
}
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return fileSize;
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}
|
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private long calculateSize(File file) {
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return file.length();
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}
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}
|
|
/**
|
* @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);
|
}
|
}
|
|
}
|
