android 简单实用的Log打印类封装，助你快速定位问题

基于Android实现一段音频和视频播放的安卓代码
http://www.eoeandroid.com/thread-195269-1-1.html

Android手机测周围环境分贝的功能源码
http://www.eoeandroid.com/thread-194968-1-1.html

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http://www.eoeandroid.com/thread-195034-1-1.html

滑动切换加载网络图片可放大缩小例子
http://www.eoeandroid.com/thread-194644-1-1.html

实现uc和墨迹天气那样的左右拖动效果
http://www.eoeandroid.com/thread-194450-1-1.html

 

 

相信众多android开发者在开发程序的过程中会经常用到Log打印信息

以方便了解当前程序的运行状况以及在出现BUG的时候能够快速定位问题

大多数童鞋会使用官方的打印log的方法，设置TAG，然后在Eclipse里面设置过滤标签，切换来回的看Log，但这样却效率很低；

下面分享一个Log打印信息的封装类，主要提供以下功能：

 

1.使用一个标签来标记当前的AP（避免设置过多的TAG来过滤显示不同Java文件下的Log）

2.显示当前的线程ID，用于辨别主线程还是子线程

3.显示当前的Java文件与打印log的行号，便于快速定位到源文件

4.最后显示你设置打印出来的信息

不罗嗦，上代码：

 

public class CommonLog {  private String tag = "CommonLog";  public static int logLevel = Log.VERBOSE;  public static boolean isDebug = true;     public CommonLog() { }      public CommonLog(String tag) {  this.tag = tag;  }     public void setTag(String tag) {  this.tag = tag;  }     private String getFunctionName() {  StackTraceElement[] sts = Thread.currentThread().getStackTrace();     if (sts == null) {  return null;  }        for (StackTraceElement st:sts) {  if (st.isNativeMethod()) {  continue;  }     if (st.getClassName().equals(Thread.class.getName())) {  continue;  }     if (st.getClassName().equals(this.getClass().getName())) {  continue;  }     return "["+Thread.currentThread().getId()+": "+st.getFileName()+":"+st.getLineNumber()+"]";  }     return null;  }     public void info(Object str) {  if (logLevel <= Log.INFO) {   String name = getFunctionName();  String ls=(name==null?str.toString():(name+" - "+str));  Log.i(tag, ls);  }  }     public void i(Object str) {  if (isDebug) {  info(str);  }  }     public void verbose(Object str) {  if (logLevel <= Log.VERBOSE) {  String name = getFunctionName();  String ls=(name==null?str.toString():(name+" - "+str));  Log.v(tag, ls);   }  }     public void v(Object str) {  if (isDebug) {  verbose(str);  }  }     public void warn(Object str) {  if (logLevel <= Log.WARN) {  String name = getFunctionName();  String ls=(name==null?str.toString():(name+" - "+str));  Log.w(tag, ls);  }  }     public void w(Object str) {  if (isDebug) {  warn(str);  }  }     public void error(Object str) {  if (logLevel <= Log.ERROR) {   String name = getFunctionName();  String ls=(name==null?str.toString():(name+" - "+str));  Log.e(tag, ls);  }  }     public void error(Exception ex) {  if (logLevel <= Log.ERROR) {  StringBuffer sb = new StringBuffer();  String name = getFunctionName();  StackTraceElement[] sts = ex.getStackTrace();     if (name != null) {  sb.append(name+" - "+ex+"\r\n");  } else {  sb.append(ex+"\r\n");  }     if (sts != null && sts.length > 0) {  for (StackTraceElement st:sts) {  if (st != null) {  sb.append("[ "+st.getFileName()+":"+st.getLineNumber()+" ]\r\n");  }  }  }     Log.e(tag, sb.toString());  }  }     public void e(Object str) {  if (isDebug) {  error(str);  }  }     public void e(Exception ex) {  if (isDebug) {  error(ex);  }  }     public void debug(Object str) {  if (logLevel <= Log.DEBUG) {  String name = getFunctionName();  String ls = (name == null?str.toString():(name+" - "+str));  Log.d(tag, ls);  }  }     public void d(Object str) {  if (isDebug) {  debug(str);  }  }  }

 

看ACTIVITY里的调用：

public class DebugDemoActivity extends Activity implements OnClickListener{  /** Called when the activity is first created. */     private CommonLog mCommonLog = LogFactory.createLog();  private Button mBtn1;  private Button mBtn2;     public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.main);     initView();     mCommonLog.e("onCreate...");     }        @Override  protected void onStart() {  // TODO Auto-generated method stub  super.onStart();     mCommonLog.e("onStart...");  }     @Override  protected void onResume() {  // TODO Auto-generated method stub  super.onResume();     mCommonLog.e("onResume...");  }           @Override  protected void onPause() {  // TODO Auto-generated method stub  super.onPause();     mCommonLog.e("onPause...");  }     @Override  protected void onStop() {  // TODO Auto-generated method stub  super.onStop();     mCommonLog.e("onStop...");  }        @Override  protected void onDestroy() {  // TODO Auto-generated method stub  super.onDestroy();     mCommonLog.e("onDestroy...");  }     public void initView()  {  mBtn1 = (Button) findViewById(R.id.button1);  mBtn1.setOnClickListener(this);     mBtn2 = (Button) findViewById(R.id.button2);  mBtn2.setOnClickListener(this);  }     @Override  public void onClick(View view) {  // TODO Auto-generated method stub  switch(view.getId())  {  case R.id.button1:  {  mCommonLog.e("R.id.button1 onClick...");  }  break;  case R.id.button2:  {  SubThread subThread = new SubThread();  subThread.start();  }  break;  default:  break;  }  }  }

最后看效果图：

 

源码下载：DebugDemo