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`package com.cundong.izhihu.util;

import android.util.Log;

public class Logger {

/**
 * log tag
 */
private String tag = "Logger";// application name

//TODO 配置Log打开或关闭
/**
 * debug or not
 */
private static boolean debug = true;

private static Logger instance = new Logger();

private Logger() {

}

public static Logger getLogger() {
	return instance;
}

private String getFunctionName() {
	StackTraceElement[] sts = Thread.currentThread().getStackTrace();

	if (sts == null) {
		return null;
	}

	for (StackTraceElement st : sts) {
		if (st.isNativeMethod()) {
			continue;
		}

		if (st.getClassName().equals(Thread.class.getName())) {
			continue;
		}

		if (st.getClassName().equals(this.getClass().getName())) {
			continue;
		}

		return "[" + Thread.currentThread().getName() + "(" + Thread.currentThread().getId() + "): " + st.getFileName() + ":" + st.getLineNumber() + "]";
	}

	return null;
}

private String createMessage(String msg) {
	String functionName = getFunctionName();
	String message = (functionName == null ? msg : (functionName + " - " + msg));
	return message;
}

/**
 * log.i
 */
public void i(String msg) {
	if (debug) {
		String message = createMessage(msg);
		Log.i(tag, message);
	}
}

/**
 * log.v
 */
public void v(String msg) {
	if (debug) {
		String message = createMessage(msg);
		Log.v(tag, message);
	}
}

/**
 * log.d
 */
public void d(String msg) {
	if (debug) {
		String message = createMessage(msg);
		Log.d(tag, message);
	}
}

/**
 * log.e
 */
public void e(String msg) {

// if (debug) { String message = createMessage(msg); Log.e(tag, message); // } }

/**
 * log.error
 */
public void error(Exception e) {
	if (debug) {
		StringBuffer sb = new StringBuffer();
		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(tag, sb.toString());
	}
}

/**
 * log.d
 */
public void w(String msg) {
	if (debug) {
		String message = createMessage(msg);
		Log.w(tag, message);
	}
}

public void setTag(String tag) {
	this.tag = tag;
}

/**
 * set debug
 */
public static void setDebug(boolean d) {
	debug = d;
}

public static boolean isDebug(){
	return debug;
}

}`