Android日志打印类LogUtils

最新推荐文章于 2024-05-07 10:22:32 发布

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本文详细探讨了Android开发中常用的日志打印工具类LogUtils的使用，通过实例代码展示了如何进行日志输出，帮助开发者更好地调试和理解应用运行状态。

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话不多说，看代码：

public final class LogUtil {
    /**
     * Log default tag.
     */
    private static String sTagDefault = "TAG";

    /**
     * Log toggle for release, default value is false.
     */
    private static boolean sToggleRelease = false;

    /**
     * Log toggle for print Throwable info, default value is true.
     */
    private static boolean sToggleThrowable = true;

    /**
     * Log toggle for print thread name, default value is false.
     */
    private static boolean sToggleThread = false;

    /**
     * Log toggle for print class name and method name, default value is false.
     */
    private static boolean sToggleClassMethod = true;

    /**
     * Log toggle for print file name and code line number, default value is
     * false.
     */
    private static boolean sToggleFileLineNumber = false;

    public static void e(String tag, String msg, Throwable e) {
        printLog(android.util.Log.ERROR, tag, msg, e);
    }

    public static void e(String msg, Throwable e) {
        printLog(android.util.Log.ERROR, null, msg, e);
    }

    public static void e(String msg) {
        printLog(android.util.Log.ERROR, null, msg, null);
    }

    public static void w(String tag, String msg, Throwable e) {
        printLog(android.util.Log.WARN, tag, msg, e);
    }


    public static void w(String msg, Throwable e) {
        printLog(android.util.Log.WARN, null, msg, e);
    }


    public static void w(String msg) {
        printLog(android.util.Log.WARN, null, msg, null);
    }

    public static void i(String tag, String msg, Throwable e) {
        printLog(android.util.Log.INFO, tag, msg, e);
    }


    public static void i(String msg) {
        printLog(android.util.Log.INFO, null, msg, null);
    }

    public static void d(String tag, String msg, Throwable e) {
        printLog(android.util.Log.DEBUG, tag, msg, e);
    }

    public static void d(String msg, Throwable e) {
        printLog(android.util.Log.DEBUG, null, msg, e);
    }

    public static void d(String tag, String msg) {
        printLog(android.util.Log.DEBUG, tag, msg, null);
    }

    public static void d(String msg) {
        printLog(android.util.Log.DEBUG, null, msg, null);
    }

    public static void v(String tag, String msg, Throwable e) {
        printLog(android.util.Log.VERBOSE, tag, msg, e);
    }

    public static void v(String tag, String msg) {
        printLog(android.util.Log.VERBOSE, tag, msg, null);
    }

    public static void v(String msg) {
        printLog(android.util.Log.VERBOSE, null, msg, null);
    }

    private static void printLog(int logType, String tag, String msg, Throwable e) {
        String tagStr = (tag == null) ? sTagDefault : tag;
        if (sToggleRelease) {
            if (logType < android.util.Log.INFO) {
                return;
            }
            String msgStr = (e == null) ? msg : (msg + "\n" + android.util.Log
                    .getStackTraceString(e));

            switch (logType) {
                case android.util.Log.ERROR:
                    android.util.Log.e(tagStr, msgStr);

                    break;
                case android.util.Log.WARN:
                    android.util.Log.w(tagStr, msgStr);

                    break;
                case android.util.Log.INFO:
                    android.util.Log.i(tagStr, msgStr);

                    break;
                default:
                    break;
            }

        } else {
            StringBuilder msgStr = new StringBuilder();

            if (sToggleThread || sToggleClassMethod || sToggleFileLineNumber) {
                Thread currentThread = Thread.currentThread();

                if (sToggleThread) {
                    msgStr.append("<");
                    msgStr.append(currentThread.getName());
                    msgStr.append("> ");
                }

                if (sToggleClassMethod) {
                    StackTraceElement ste = currentThread.getStackTrace()[4];
                    String className = ste.getClassName();
                    msgStr.append("[");
                    msgStr.append(className == null ? null : className.substring(className
                            .lastIndexOf('.') + 1));
                    msgStr.append("::");
                    msgStr.append(ste.getMethodName());
                    msgStr.append("] ");
                }

                if (sToggleFileLineNumber) {
                    StackTraceElement ste = currentThread.getStackTrace()[4];
                    msgStr.append("[");
                    msgStr.append(ste.getFileName());
                    msgStr.append(":");
                    msgStr.append(ste.getLineNumber());
                    msgStr.append("] ");
                }
            }

            msgStr.append(msg);
            if (e != null && sToggleThrowable) {
                msgStr.append('\n');
                msgStr.append(android.util.Log.getStackTraceString(e));
            }

            switch (logType) {
                case android.util.Log.ERROR:
                    android.util.Log.e(tagStr, msgStr.toString());

                    break;
                case android.util.Log.WARN:
                    android.util.Log.w(tagStr, msgStr.toString());

                    break;
                case android.util.Log.INFO:
                    android.util.Log.i(tagStr, msgStr.toString());

                    break;
                case android.util.Log.DEBUG:
                    android.util.Log.d(tagStr, msgStr.toString());

                    break;
                case android.util.Log.VERBOSE:
                    android.util.Log.v(tagStr, msgStr.toString());

                    break;
                default:
                    break;
            }
        }
    }

}