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

代码仓库——游戏源码汇总
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