一个好用的Log管理类

public class L {
private static String className;            //所在的类名
private static String methodName;            //所在的方法名
private static int lineNumber;                //所在行号

public static final int VERBOSE = 1;          //显示Verbose及以上的Log
public static final int DEBUG = 2;            //显示Debug及以上的Log
public static final int INFO = 3;            //显示Info及以上的Log
public static final int WARN = 4;            //显示Warn及以上的Log
public static final int ERROR = 5;            //显示Error及以上的Log
public static final int NOTHING = 6;        //全部不显示

public static final int LEVEL = NOTHING;    //控制显示的级别

private L() {
}

public static boolean isDebuggable() {
return BuildConfig.DEBUG;
}

private static String createLog(String log) {

StringBuffer buffer = new StringBuffer();
buffer.append("[");
buffer.append(methodName);
buffer.append(":");
buffer.append(lineNumber);
buffer.append("]");
buffer.append(log);

return buffer.toString();
}

private static void getMethodNames(StackTraceElement[] sElements) {
className = sElements[1].getFileName();
methodName = sElements[1].getMethodName();
lineNumber = sElements[1].getLineNumber();
}

public static void v(String message) {
if (!isDebuggable()) {
return;
}

if (LEVEL <= VERBOSE) {
getMethodNames(new Throwable().getStackTrace());
Log.v(className, createLog(message));
}
}

public static void d(String message) {
if (!isDebuggable()) {
return;
}

if (LEVEL <= DEBUG) {
getMethodNames(new Throwable().getStackTrace());
Log.d(className, createLog(message));
}
}

public static void i(String message) {
if (!isDebuggable()) {
return;
}

if (LEVEL <= INFO) {
getMethodNames(new Throwable().getStackTrace());
Log.i(className, createLog(message));
}
}

public static void w(String message) {
if (!isDebuggable()) {
return;
}

if (LEVEL <= WARN) {
getMethodNames(new Throwable().getStackTrace());
Log.w(className, createLog(message));
}
}

public static void e(String message) {
if (!isDebuggable()) {
return;
}

if (LEVEL <= ERROR) {
getMethodNames(new Throwable().getStackTrace());
Log.e(className, createLog(message));
}
}
}