实用的工具类Logutil

最新推荐文章于 2025-07-14 21:04:16 发布

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最新推荐文章于 2025-07-14 21:04:16 发布

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分类专栏：【Android - 路上的那些事】

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本文介绍了一个实用的Java日志工具类实现，该工具类能够根据不同级别的日志输出详细的信息，包括线程ID、线程名、文件名、类名、方法名及行号等。通过设置不同的日志级别，可以灵活地控制哪些级别的日志会被记录。

public class LogUtil {

	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);
		}
	}

	/**
	 * 获取默认的TAG名称. 
	 * 比如在MainActivity.java中调用了日志输出. 
	 * 则TAG为MainActivity
	 */
	public static String getDefaultTag(StackTraceElement stackTraceElement) {
		String fileName = stackTraceElement.getFileName();
		String stringArray[] = fileName.split("\\.");
		String tag = stringArray[0];
		return tag;
	}

	/**
	 * 输出日志所包含的信息
	 */
	public static String getLogInfo(StackTraceElement stackTraceElement) {
		StringBuilder logInfoStringBuilder = new StringBuilder();
		// 获取线程名
		String threadName = Thread.currentThread().getName();
		// 获取线程ID
		long threadID = Thread.currentThread().getId();
		// 获取文件名.即xxx.java
		String fileName = stackTraceElement.getFileName();
		// 获取类名.即包名+类名
		String className = stackTraceElement.getClassName();
		// 获取方法名称
		String methodName = stackTraceElement.getMethodName();
		// 获取生日输出行数
		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();
	}
}