实用的Log打印类封装，助尼快速定位源码（android）

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().getName()+"("+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...");            }@Overrideprotected void onStart() {// TODO Auto-generated method stubsuper.onStart(); mCommonLog.e("onStart...");}@Overrideprotected void onResume() {// TODO Auto-generated method stubsuper.onResume(); mCommonLog.e("onResume...");}@Overrideprotected void onPause() {// TODO Auto-generated method stubsuper.onPause(); mCommonLog.e("onPause...");}@Overrideprotected void onStop() {// TODO Auto-generated method stubsuper.onStop(); mCommonLog.e("onStop...");}        @Overrideprotected void onDestroy() {// TODO Auto-generated method stubsuper.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);    }@Overridepublic void onClick(View view) {// TODO Auto-generated method stubswitch(view.getId()){case R.id.button1:{ mCommonLog.e("R.id.button1onClick...");}break;case R.id.button2:{SubThread subThread = new SubThread();subThread.start();}break;default:break;}}}

最后看效果图：

下面附上工程链接：

http://download.csdn.net/detail/geniuseoe2012/4470104

欲了解更多androidlogcat的使用，请看这篇博文：

http://blog.csdn.net/geniuseoe2012/article/details/7820366

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