应用程序使用同一个TAG的Log方法

1. 简介

   调用Log记录日志时，如果每个文件定义自己的TAG，且作为Log的第一个入参，那么在adb logcat的使用，要写上多个TAG:d。为了简化，可以让整个应用使用一个TAG，比如使用appName。然后每个class再定义二级TAG，用以界定LOG所在的文件。

   
   

2. 实现代码
   

如下：

package com.example.utils;

import android.util.Log;

public class LogUtils {
    private static final String TAG = "MyAppName";

    public static void v(String tag, String msg) {
        Log.v(TAG, "[" + tag + "]" + msg);
    }

    public static void v(String tag, String msg, Throwable tr) {
        Log.v(TAG, "[" + tag + "]" + msg, tr);
    }    

    public static void d(String tag, String msg) {
        Log.d(TAG, "[" + tag + "]" + msg);
    }

    public static void d(String tag, String msg, Throwable tr) {
        Log.d(TAG, "[" + tag + "]" + msg, tr);
    }

    public static void w(String tag, String msg) {
        Log.w(TAG, "[" + tag + "]" + msg);
    }

    public static void w(String tag, String msg, Throwable tr) {
        Log.w(TAG, "[" + tag + "]" + msg, tr);
    }

    public static void e(String tag, String msg) {
        Log.e(TAG, "[" + tag + "]" + msg);
    }

    public static void e(String tag, String msg, Throwable tr) {
        Log.e(TAG, "[" + tag + "]" + msg, tr);
    }

    public static void printStackTraces(String tag) {
        StackTraceElement[] elements = Thread.currentThread().getStackTrace();
        LogUtils.e(TAG, "[" + tag + "] stack trace elements:");
        final String TABS = "    ";

        for (StackTraceElement element : elements) {
            Log.e(TAG, TABS + element.toString());
        }
    }

}

06-09 20:05:41.776: D/HelloIntent(1265): [CallerActivity]onCreate()
06-09 20:05:41.886: D/HelloIntent(1265): [CallerActivity]onCreateOptionsMenu()
06-09 20:05:45.056: D/HelloIntent(1265): [CallerActivity]onClick()
06-09 20:05:45.076: D/HelloIntent(1265): [CalleeActivity]onCreate()
06-09 20:05:45.096: D/HelloIntent(1265): [CalleeActivity]intent=Intent { flg=0x20000000 cmp=com.example.hellotoast/com.example.hellointent.CalleeActivity (has extras) }
06-09 20:05:45.096: D/HelloIntent(1265): [CalleeActivity]extra:Hello, Callee!
06-09 20:05:58.446: D/HelloIntent(1265): [CalleeActivity]onClick()
06-09 20:05:58.876: D/HelloIntent(1265): [CalleeActivity]onDestroy()