Encapsulation of Log output logs of Android system LogUtils

Encapsulation of Log output logs of Android system LogUtils
MainActivity is as follows:

Package cc.cn. logutil; import android. OS. bundle; import android. app. activity;/*** Demo Description: * encapsulation of Log output logs of the Android system LogUtils ** 1. You can modify the LEVEL values in LogUtils to determine which levels of logs can be output. * It is convenient to output logs selectively or shield logs from output. * 2 the output logs include the thread, class, and method name of the log output, practical information such as the number of rows already in this method * 3 LogUtils call Method * 3.1 According to the system's original method * 3.2 or no TAG is set, the default is the file name ** remarks: * StackTrace and StackTraceElement are used in this example. * For details, see the StackTrace overview and StackTraceElement instance in the previous blog. ** PS: * today, I have a cold and fever. it is a consolation to complete this example after work * September 23, 2014 23:05:01. */public class MainActivity extends Activity {@ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); LogUtils. I ("MainActivity", "onCreate1"); LogUtils. I (null, "onCreate2"); LogUtils. I ("", "onCreate3"); LogUtils. I ("onCreate4"); test ();} private void test () {LogUtils. I ("test () in MainActivity called"); TestLog. testLog (); new Thread () {public void run () {LogUtils. I ("subthread called ");};}. start () ;}@ Overrideprotected void onStart () {super. onStart (); LogUtils. I ("onStart") ;}@ Overrideprotected void onResume () {super. onResume (); LogUtils. I ("onResume") ;}@ Overrideprotected void onPause () {super. onPause (); LogUtils. I ("onPause") ;}@ Overrideprotected void onStop () {super. onStop (); LogUtils. I ("onStop") ;}@ Overrideprotected void onDestroy () {super. onDestroy (); LogUtils. I ("onDestroy ");}}

LogUtils is as follows:

Package cc.cn. logutil; import android. text. textUtils; import android. util. log;/*** LogUtils tool Description: * 1 only outputs logs with a LEVEL greater than or equal to the LEVEL *. Therefore, after development and product release, you can modify the LEVEL to output logs selectively. * When LEVEL = NOTHING, all logs are blocked. * 2 v, d, I, w, and e correspond to two methods. * If the TAG is not set or the TAG is empty, set the default TAG. **/public class LogUtils {public static final int VERBOSE = 1; public static final int DEBUG = 2; public static final int INFO = 3; public static final int WARN = 4; public static final int ERROR = 5; public static final int NOTHING = 6; public static final int LEVEL = VERBOSE; public static final String SEPARATOR = ","; public static void v (String message) {if (LEVEL <= VERBOSE) {StackTraceElement stackTraceElement = Thread. currentThread (). getStackTrace () [3]; String tag = getDefaultTag (stackTraceElement); Log. v (tag, getLogInfo (stackTraceElement) + message) ;}} public static void v (String tag, String message) {if (LEVEL <= VERBOSE) {StackTraceElement stackTraceElement = Thread. currentThread (). getStackTrace () [3]; if (TextUtils. isEmpty (tag) {tag = getDefaultTag (stackTraceElement);} Log. v (tag, getLogInfo (stackTraceElement) + message) ;}} public static void d (String message) {if (LEVEL <= DEBUG) {StackTraceElement stackTraceElement = Thread. currentThread (). getStackTrace () [3]; String tag = getDefaultTag (stackTraceElement); Log. d (tag, getLogInfo (stackTraceElement) + message) ;}} public static void d (String tag, String message) {if (LEVEL <= DEBUG) {StackTraceElement stackTraceElement = Thread. currentThread (). getStackTrace () [3]; if (TextUtils. isEmpty (tag) {tag = getDefaultTag (stackTraceElement);} Log. d (tag, getLogInfo (stackTraceElement) + message) ;}} public static void I (String message) {if (LEVEL <= INFO) {StackTraceElement stackTraceElement = Thread. currentThread (). getStackTrace () [3]; String tag = getDefaultTag (stackTraceElement); Log. I (tag, getLogInfo (stackTraceElement) + message) ;}} public static void I (String tag, String message) {if (LEVEL <= INFO) {StackTraceElement stackTraceElement = Thread. currentThread (). getStackTrace () [3]; if (TextUtils. isEmpty (tag) {tag = getDefaultTag (stackTraceElement);} Log. I (tag, getLogInfo (stackTraceElement) + message) ;}} public static void w (String message) {if (LEVEL <= WARN) {StackTraceElement stackTraceElement = Thread. currentThread (). getStackTrace () [3]; String tag = getDefaultTag (stackTraceElement); Log. w (tag, getLogInfo (stackTraceElement) + message) ;}} public static void w (String tag, String message) {if (LEVEL <= WARN) {StackTraceElement stackTraceElement = Thread. currentThread (). getStackTrace () [3]; if (TextUtils. isEmpty (tag) {tag = getDefaultTag (stackTraceElement);} Log. w (tag, getLogInfo (stackTraceElement) + message) ;}} public static void e (String tag, String message) {if (LEVEL <= ERROR) {StackTraceElement stackTraceElement = Thread. currentThread (). getStackTrace () [3]; if (TextUtils. isEmpty (tag) {tag = getDefaultTag (stackTraceElement);} Log. e (tag, getLogInfo (stackTraceElement) + message) ;}/ *** get the default TAG name. * For example, In MainActivity. the log output is called in java. * The TAG is MainActivity */public static String getDefaultTag (StackTraceElement stackTraceElement) {String fileName = stackTraceElement. getFileName (); String stringArray [] = fileName. split ("\\. "); String tag = stringArray [0]; return tag;}/*** output log information */public static String getLogInfo (StackTraceElement stackTraceElement) {StringBuilder logInfoStringBuilder = new StringBuilder (); // obtain the Thread name String threadName = Thread. currentThread (). getName (); // get the Thread IDlong threadID = Thread. currentThread (). getId (); // get the file name. xxx. javaString fileName = stackTraceElement. getFileName (); // get the class name. that is, package name + class name String className = stackTraceElement. getClassName (); // obtain the method name String methodName = stackTraceElement. getMethodName (); // get the number of output rows for the birthday int lineNumber = stackTraceElement. getLineNumber (); logInfoStringBuilder. append ("["); logInfoStringBuilder. append ("threadID =" + threadID ). append (SEPARATOR); logInfoStringBuilder. append ("threadName =" + threadName ). append (SEPARATOR); logInfoStringBuilder. append ("fileName =" + fileName ). append (SEPARATOR); logInfoStringBuilder. append ("className =" + className ). append (SEPARATOR); logInfoStringBuilder. append ("methodName =" + methodName ). append (SEPARATOR); logInfoStringBuilder. append ("lineNumber =" + lineNumber); logInfoStringBuilder. append ("]"); return logInfoStringBuilder. toString ();}}

TestLog is as follows:

Package cc.cn. logutil; public class TestLog {public static void testLog () {LogUtils. I ("TestLog () in testLog is called ()");}}

Main. xml is as follows: