可以显示行号的Android Log 工具

Android 的Log 类只能以TAG的方式却分不同类的信息，这里利用反射的方式，将Log所在的行号和类名抓出来，以后转交测试的时候如果看到log的消息就可以快速定位软件的bug

package com.tcl.navigator.utils;

import android.util.Log;

public class LogUtils {
	private static final boolean DEBUG = true;
	private static final String TAG = "LogUtils.java";

	public static void e(String message) {
		if (DEBUG) {
			StackTraceElement[] elements = Thread.currentThread().getStackTrace();
			if (elements.length < 4) {
				Log.e(TAG, "Stack to shallow");
			}else{
				String fullClassName = elements[3].getClassName();
				String className = fullClassName.substring(fullClassName.lastIndexOf(".") + 1);
				String methodName = elements[3].getMethodName();
				int lineNumber = elements[3].getLineNumber();
				Log.e(className + "." + methodName + "():" + lineNumber,message);
			}
		}
	}
	public static void d(String message) {
		if (DEBUG) {
			StackTraceElement[] elements = Thread.currentThread().getStackTrace();
			if (elements.length < 3) {
				Log.e(TAG, "Stack to shallow");
			}else{
				String fullClassName = elements[3].getClassName();
				String className = fullClassName.substring(fullClassName.lastIndexOf(".") + 1);
				String methodName = elements[3].getMethodName();
				int lineNumber = elements[3].getLineNumber();
				Log.d(className + "." + methodName + "():" + lineNumber,message);
			}
		}
	}
	public static void i(String message) {
		if (DEBUG) {
			StackTraceElement[] elements = Thread.currentThread().getStackTrace();
			if (elements.length < 3) {
				Log.e(TAG, "Stack to shallow");
			}else{
				String fullClassName = elements[3].getClassName();
				String className = fullClassName.substring(fullClassName.lastIndexOf(".") + 1);
				String methodName = elements[3].getMethodName();
				int lineNumber = elements[3].getLineNumber();
				Log.i(className + "." + methodName + "():" + lineNumber,message);
			}
		}
	}
	
	public static void w(String message) {
		if (DEBUG) {
			StackTraceElement[] elements = Thread.currentThread().getStackTrace();
			if (elements.length < 3) {
				Log.e(TAG, "Stack to shallow");
			}else{
				String fullClassName = elements[3].getClassName();
				String className = fullClassName.substring(fullClassName.lastIndexOf(".") + 1);
				String methodName = elements[3].getMethodName();
				int lineNumber = elements[3].getLineNumber();
				Log.w(className + "." + methodName + "():" + lineNumber,message);
			}
		}
	}
	public static void v(String message) {
		if (DEBUG) {
			StackTraceElement[] elements = Thread.currentThread().getStackTrace();
			if (elements.length < 3) {
				Log.e(TAG, "Stack to shallow");
			}else{
				String fullClassName = elements[3].getClassName();
				String className = fullClassName.substring(fullClassName.lastIndexOf(".") + 1);
				String methodName = elements[3].getMethodName();
				int lineNumber = elements[3].getLineNumber();
				Log.v(className + "." + methodName + "():" + lineNumber,message);
			}
		}
	}
	
}