Android Logging

最新推荐文章于 2024-12-23 18:11:38 发布

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原文链接：https://yq.aliyun.com/articles/47708

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Here is HauteLook’s logger class from our Android Code Library. It displays class name, method name and line number per line of log message.

package com.hautelook.android.lib.logger;

/**

 * @authorjimmy@hautelook.com

 * @copyright 2011 HauteLook

 * 

 * Description:

 *   Simple logger that displays: class name, method name and line number

 *

 *

 * Usage:

 *  

 *   Use this class directly or customize it by extending it.

 *  

 *      HLlog.i("");

 *      HLLog.i("called");

 *      HLLog.i("called","tag");

 *   

 *      L.i();

 *      L.i("called");

 *      L.i("called","tag");

 * 

 * Sub-classing example:

 * 

 *    // C.DEBUG = boolean true/false (project specific constant class)

 * 

 *    public class L extends HLLog {

 *     

 *           public static String DEFAULT_TAG = "HauteLook";

 *     

 *           public static void i() {

 *                if(C.DEBUG) callLogger("i", DEFAULT_TAG, "");

 *           }

 *     

 *           public static void i(String message) {

 *                  if(C.DEBUG) callLogger("i", DEFAULT_TAG, message);

 *           }

 *

 *           public static void i(String message, String tag) {

 *                  if(C.DEBUG) callLogger("i", tag, message);

 *           }

 *

 *    }

 *  

 */

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import android.util.Log;

@SuppressWarnings("unused")
publicclass HLLog {

       publicstatic String DEFAULT_TAG ="HauteLookLib";

       finalstaticintdepth = 4;

       publicstaticvoid i(String message) {

              callLogger("i", DEFAULT_TAG, message);

       }

       publicstaticvoid i(String message, String tag) {

              callLogger("i", tag, message);

       }

       publicstaticvoid d(String message) {

              callLogger("d", DEFAULT_TAG, message);

       }

       publicstaticvoid d(String message, String tag) {

              callLogger("d", tag, message);

       }

       publicstaticvoid e(String message) {

              callLogger("e", DEFAULT_TAG, message);

       }

       publicstaticvoid e(String message, String tag) {

              callLogger("e", tag, message);

       }

       publicstaticvoid w(String message) {

              callLogger("w", DEFAULT_TAG, message);

       }

       publicstaticvoid w(String message, String tag) {

              callLogger("w", tag, message);

       }

       publicstaticvoid v(String message) {

              callLogger("v", DEFAULT_TAG, message);

       }

       publicstaticvoid v(String message, String tag) {

              callLogger("v", tag, message);

       }

       @SuppressWarnings("rawtypes")

       publicstaticvoid callLogger(String methodName, String tag, String message) {

              final StackTraceElement[] ste = Thread.currentThread().getStackTrace();

              try {

                     Class cls = Class.forName("android.util.Log");

                     Method method = cls.getMethod(methodName, String.class,       String.class);

                     method.invoke(null, tag, getTrace(ste) + message);

              } catch (ClassNotFoundException e) {

                     e.printStackTrace();

              } catch (IllegalArgumentException e) {

                     e.printStackTrace();

              } catch (SecurityException e) {

                     e.printStackTrace();

              } catch (IllegalAccessException e) {

                     e.printStackTrace();

              } catch (InvocationTargetException e) {

                     e.printStackTrace();

              } catch (NoSuchMethodException e) {

                     e.printStackTrace();

              }

       }

       publicstatic String getTrace(StackTraceElement[] ste) {

              return"[" + getClassName(ste) + "][" + getMethodName(ste) + "][" + getLineNumber(ste) + "] ";

       }

       publicstatic String getClassPackage(StackTraceElement[] ste) {

              return ste[depth].getClassName();

       }

       publicstatic String getClassName(StackTraceElement[] ste) {

              String[] temp = ste[depth].getClassName().split("\\.");

              return temp[temp.length - 1];

       }

       publicstatic String getMethodName(StackTraceElement[] ste) {

              return ste[depth].getMethodName();

       }

       publicstaticint getLineNumber(StackTraceElement[] ste) {

              return ste[depth].getLineNumber();

       }

}

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