Android日志框架Logger修改默认缓存路径
2019-09-29 本文已影响0人
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android日志框架logger
https://github.com/orhanobut/logger
代码与分析
这里只针对性的分析磁盘缓存路径的修改,设置磁盘(SD卡)缓存的代码如下所示:
FormatStrategy formatStrategy = CsvFormatStrategy.newBuilder()
.tag("custom")
.build();
Logger.addLogAdapter(new DiskLogAdapter(formatStrategy));
其中CsvFormatStrategy为默认的文件格式化策略。
@NonNull public CsvFormatStrategy build() {
if (date == null) {
date = new Date();
}
if (dateFormat == null) {
dateFormat = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss.SSS", Locale.UK);
}
if (logStrategy == null) {
String diskPath = Environment.getExternalStorageDirectory().getAbsolutePath();
String folder = diskPath + File.separatorChar + "logger";
HandlerThread ht = new HandlerThread("AndroidFileLogger." + folder);
ht.start();
Handler handler = new DiskLogStrategy.WriteHandler(ht.getLooper(), folder, MAX_BYTES);
logStrategy = new DiskLogStrategy(handler);
}
return new CsvFormatStrategy(this);
}
CsvFormatStrategy使用建造者模式创建实例,通过源码可以看到缓存路径是通过logStrategy 进行设置的,没有办法直接修改folder,可以考虑通过重写CsvFormatStrategy类进行修改,或者传入自己重写的DiskLogStrategy进行修改。修改过程中发现重写方案中,有些代码的作用域是受保护的,会导致要拷贝的类较多,所以考虑通过反射的方式,实现缓存路径的修改,代码如下:
public static void init() {
String diskPath = Environment.getExternalStorageDirectory().getAbsolutePath();
String folder = diskPath + File.separatorChar + "loggeraa";
HandlerThread ht = new HandlerThread("AndroidFileLogger." + folder);
ht.start();
try {
//通过反射实例化DiskLogStrategy中的内部类WriteHandler
Class<?> clazz = Class.forName("com.orhanobut.logger.DiskLogStrategy$WriteHandler");
Constructor constructor = clazz.getDeclaredConstructor(Looper.class, String.class, int.class);
//开启强制访问
constructor.setAccessible(true);
//核心:通过构造函数,传入相关属性,得到WriteHandler实例
Handler handler = (Handler) constructor.newInstance(ht.getLooper(), folder, MAX_BYTES * 1024);
//创建缓存策略
FormatStrategy strategy = CsvFormatStrategy.newBuilder().logStrategy(new DiskLogStrategy(handler)).build();
DiskLogAdapter adapter = new DiskLogAdapter(strategy);
Logger.addLogAdapter(adapter);
} catch (Exception e) {
e.printStackTrace();
ht.quit();
}
}
最终效果:
通过调试看到缓存策略的路径已经被修改为"/storage/emulated/0/loggeraa"
缓存路径修改