开源TT框架上的日志类

public class Logger {/** * log tag */private String tagName = "MoGuLogger";// tag name// private static int logLevel = Log.VERBOSE;private static int logLevel = Log.VERBOSE;private static Logger inst;private Lock lock;private Logger() {lock = new ReentrantLock();}public static synchronized Logger getLogger(Class<?> key) {if (inst == null) {inst = new Logger();}return inst;}private String getFunctionName() {StackTraceElement[] sts = Thread.currentThread().getStackTrace();if (sts == null) {return null;}Log.i("TAG", "start" + "threadName:" + Thread.class.getName() + " className:"+ this.getClass().getName());for (StackTraceElement st : sts) {Log.i("TAG", st.getClassName());}Log.i("TAG", "end");for (StackTraceElement st : sts) {Log.i("TAG", st.getClassName());if (st.isNativeMethod()) {continue;}if (st.getClassName().equals(Thread.class.getName())) {continue;}if (st.getClassName().equals(this.getClass().getName())) {continue;}return "[" + st.getFileName() + ":" + st.getLineNumber() + "]";}return null;}private String createMessage(String msg) {String functionName = getFunctionName();long threadId = Thread.currentThread().getId();String currentTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS").format(new Date());String message = (functionName == null ? msg : (functionName + " - "+ String.valueOf(threadId) + " - " + msg));return currentTime + " - " + message;}/** * log.i */public void i(String format, Object... args) {if (logLevel <= Log.INFO) {lock.lock();try {String message = createMessage(getInputString(format, args));Log.i(tagName, message);} finally {lock.unlock();}}}/** * log.v */public void v(String format, Object... args) {if (logLevel <= Log.VERBOSE) {lock.lock();try {String message = createMessage(getInputString(format, args));Log.v(tagName, message);} finally {lock.unlock();}}}/** * log.d */public void d(String format, Object... args) {if (logLevel <= Log.DEBUG) {lock.lock();try {String message = createMessage(getInputString(format, args));Log.d(tagName, message);} finally {lock.unlock();}}}/** * log.e */public void e(String format, Object... args) {if (logLevel <= Log.ERROR) {lock.lock();try {String message = createMessage(getInputString(format, args));Log.e(tagName, message);} finally {lock.unlock();}}}private String getInputString(String format, Object... args) {if (format == null) {return "null log format";}return String.format(format, args);}/** * log.error */public void error(Exception e) {if (logLevel <= Log.ERROR) {StringBuffer sb = new StringBuffer();lock.lock();try {String name = getFunctionName();StackTraceElement[] sts = e.getStackTrace();if (name != null) {sb.append(name + " - " + e + "\r\n");} else {sb.append(e + "\r\n");}if (sts != null && sts.length > 0) {for (StackTraceElement st : sts) {if (st != null) {sb.append("[ " + st.getFileName() + ":" + st.getLineNumber() + " ]\r\n");}}}Log.e(tagName, sb.toString());} finally {lock.unlock();}}}/** * log.d */public void w(String format, Object... args) {if (logLevel <= Log.WARN) {lock.lock();try {String message = createMessage(getInputString(format, args));Log.w(tagName, message);} finally {lock.unlock();}}}/** * set log level */public void setLevel(int l) {lock.lock();try {logLevel = l;} finally {lock.unlock();}}}