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;
     }
 }