android开发中怎么通过Log函数输出当前行号和当前函数名

public class Debug {
	public static int line(Exception e) {
		StackTraceElement[] trace = e.getStackTrace();
		if (trace == null || trace.length == 0)
			return -1; //
		return trace[0].getLineNumber();
	}
	public static String fun(Exception e) {
		StackTraceElement[] trace = e.getStackTrace();
		if (trace == null)
			return ""; //
		return trace[0].getMethodName();
	}
}

　　使用场景：

public class test {
	public static String DI(Exception e) {
		return Debug.line(e)+"|"+Debug.fun(e)+"|";
	}
        public test() {
                 Log.d(TAG, DI(new Exception()));  //这里就输出我们需要的debug信息了
        }
}   

　　

 另一种使用形式：

public class DebugInfo extends Exception {
    public int line() {
        StackTraceElement[] trace = getStackTrace();
        if (trace == null || trace.length == 0) {
            return -1;
        }
        return trace[0].getLineNumber();
    }

    public String fun() {
        StackTraceElement[] trace = getStackTrace();
        if (trace == null || trace.length == 0) {
            return "";
        }
        return trace[0].getMethodName();
    }

    public DebugInfo() {
        super();
    }
    
    @Override
    public String toString() {
        return line() + "|" + fun() + "|";  
    }
}

使用方法

Log.d(TAG, new DebugInfo() + "hello world!");

 

public class DebugInfo {
    public static int line(StackTraceElement e) {
        return e.getLineNumber();
    }

    public static String method(StackTraceElement e) {
        return e.getMethodName();
    }

    public static String info(StackTraceElement e) {
        String ret = line(e) + "|" + method(e) + "|";
        return ret;
    }
}