package com.itheima.zhbj74.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Bitmap.CompressFormat;
import android.os.Environment;
/**
* 本地缓存
*
* @author Kevin
* @date 2015-10-24
*/
public class LocalCacheUtils {
private static final String LOCAL_CACHE_PATH = Environment
.getExternalStorageDirectory().getAbsolutePath() + "/zhbj74_cache";
// 写本地缓存
public void setLocalCache(String url, Bitmap bitmap) {
File dir = new File(LOCAL_CACHE_PATH);
if (!dir.exists() || !dir.isDirectory()) {
dir.mkdirs();// 创建文件夹
}
try {
String fileName = MD5Encoder.encode(url);
File cacheFile = new File(dir, fileName);
bitmap.compress(CompressFormat.JPEG, 100, new FileOutputStream(
cacheFile));// 参1:图片格式;参2:压缩比例0-100; 参3:输出流
} catch (Exception e) {
e.printStackTrace();
}
}
// 读本地缓存
public Bitmap getLocalCache(String url) {
try {
File cacheFile = new File(LOCAL_CACHE_PATH, MD5Encoder.encode(url));
if (cacheFile.exists()) {
Bitmap bitmap = BitmapFactory.decodeStream(new FileInputStream(
cacheFile));
return bitmap;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}