27、android log日志

一、记住

加写sd卡权限

二、代码

 package com.example.logtest;

 import java.io.File;
 import java.io.IOException;

 import org.apache.log4j.Appender;
 import org.apache.log4j.FileAppender;
 import org.apache.log4j.Logger;
 import org.apache.log4j.PatternLayout;

 import android.app.Activity;
 import android.os.Bundle;
 import android.os.Environment;
 import android.util.Log;

 public class MainActivity extends Activity {

     public static  Logger gLoggerTvMenu;
     public static String pathTvMenuCache =  Environment.getExternalStorageDirectory()+File.separator+"5wei"+ File.separator+"TvMenuCache"+ File.separator;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         gLoggerTvMenu = Logger.getLogger("tvMenu");
         PatternLayout tvMenuLayout = new PatternLayout("%d %p [%c] - %m%n");
         try {
             Appender tvMenuAppender = new FileAppender(tvMenuLayout,pathTvMenuCache+"tvMenu.log");
             gLoggerTvMenu.addAppender(tvMenuAppender);
         } catch (IOException e) {
             // TODO Auto-generated catch block
             Log.e("error", "wrong :"+e.getMessage());
             e.printStackTrace();
         }

         gLoggerTvMenu.debug("it is a test");
     }
 }

三、效果

在对应目录生成对应的日志文件

四、demo外链

http://pan.baidu.com/s/1dDCiS17