android 一个很好使用的 LogUtils 日志工具类

public class LogUtils {
    static String className;//类名
    static String methodName;//方法名
    static int lineNumber;//行数

    private LogUtils() {
    }

    public static boolean isDebuggable() {
        return true;
    }

    private static String createLog(String log) {
        StringBuffer buffer = new StringBuffer();
        buffer.append(methodName);
        buffer.append("(").append(className).append(":").append(lineNumber).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 e(String message) {
        if (!isDebuggable())
            return;
        // Throwable instance must be created before any methods
        getMethodNames(new Throwable().getStackTrace());
        Log.e(className, createLog(message));
    }


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

        getMethodNames(new Throwable().getStackTrace());
        Log.i(className, createLog(message));
    }

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

        getMethodNames(new Throwable().getStackTrace());
        Log.d(className, createLog(message));
    }

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

        getMethodNames(new Throwable().getStackTrace());
        Log.v(className, createLog(message));
    }

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

        getMethodNames(new Throwable().getStackTrace());
        Log.w(className, createLog(message));
    }

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

        getMethodNames(new Throwable().getStackTrace());
        Log.wtf(className, createLog(message));
    }

}