在Android Volley中，“wtf”的意思是什么？

Question

我遇到了这个方法。

 public static void wtf(String format, Object... args) {
        Log.wtf(TAG, buildMessage(format, args));
    }



public static int wtf(String tag, String msg, Throwable tr) {
        throw new RuntimeException("Stub!");
    }

当我仔细研究 Android Volley 时，然而这个方法被 Library Developers 用于记录 Volley 的错误，但除了通常的意义之外，这是否还有其他意义？我不确定程序员是否应该采用这样的命名约定？

- Sanjeet A

---

多么可怕的失败。 - dev-masih

这句话的意思是“多么可怕的失败”。 - calvinfly

我希望他们能用更专业和适合所有年龄段的名称来重新命名这个调用。正如大家所知，WTF代表其他含义（无论你怎么解释）。 https://www.urbandictionary.com/define.php?term=wtf. - likejudo

Answer 1

在API文档中非常清楚地说明了，WTF在这种情况下代表What a Terrible Failure。您可以参考Dr. Evil的说法并这样说：;）。

- NSNoob

Answer 2

引用自developer.android.com：

一个可怕的失败：报告永远不应该发生的条件。 错误将始终在ASSERT级别记录，并带有调用堆栈。

- Mattia Maestrini

---

我之前理解错了非编程意义，现在明白了 :)。 - Sanjeet A

Answer 3

用于检测类似日志的内容：

package com.android.volley;

import android.os.SystemClock;
import android.util.Log;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

/** Logging helper class. */
public class VolleyLog {
    public static String TAG = "Volley";

    public static boolean DEBUG = Log.isLoggable(TAG, Log.VERBOSE);

    /**
     * Customize the log tag for your application, so that other apps
     * using Volley don't mix their logs with yours.
     * <br />
     * Enable the log property for your tag before starting your app:
     * <br />
     * {@code adb shell setprop log.tag.&lt;tag&gt;}
     */
    public static void setTag(String tag) {
        d("Changing log tag to %s", tag);
        TAG = tag;

        // Reinitialize the DEBUG "constant"
        DEBUG = Log.isLoggable(TAG, Log.VERBOSE);
    }

    public static void v(String format, Object... args) {
        if (DEBUG) {
            Log.v(TAG, buildMessage(format, args));
        }
    }

    public static void d(String format, Object... args) {
        Log.d(TAG, buildMessage(format, args));
    }

    public static void e(String format, Object... args) {
        Log.e(TAG, buildMessage(format, args));
    }

    public static void e(Throwable tr, String format, Object... args) {
        Log.e(TAG, buildMessage(format, args), tr);
    }

    public static void wtf(String format, Object... args) {
        Log.wtf(TAG, buildMessage(format, args));
    }

    public static void wtf(Throwable tr, String format, Object... args) {
        Log.wtf(TAG, buildMessage(format, args), tr);
    }

    /**
     * Formats the caller's provided message and prepends useful info like
     * calling thread ID and method name.
     */
    private static String buildMessage(String format, Object... args) {
        String msg = (args == null) ? format : String.format(Locale.US, format, args);
        StackTraceElement[] trace = new Throwable().fillInStackTrace().getStackTrace();

        String caller = "<unknown>";
        // Walk up the stack looking for the first caller outside of VolleyLog.
        // It will be at least two frames up, so start there.
        for (int i = 2; i < trace.length; i++) {
            Class<?> clazz = trace[i].getClass();
            if (!clazz.equals(VolleyLog.class)) {
                String callingClass = trace[i].getClassName();
                callingClass = callingClass.substring(callingClass.lastIndexOf('.') + 1);
                callingClass = callingClass.substring(callingClass.lastIndexOf('$') + 1);

                caller = callingClass + "." + trace[i].getMethodName();
                break;
            }
        }
        return String.format(Locale.US, "[%d] %s: %s",
                Thread.currentThread().getId(), caller, msg);
    }

    /**
     * A simple event log with records containing a name, thread ID, and timestamp.
     */
    static class MarkerLog {
        public static final boolean ENABLED = VolleyLog.DEBUG;

        /** Minimum duration from first marker to last in an marker log to warrant logging. */
        private static final long MIN_DURATION_FOR_LOGGING_MS = 0;

        private static class Marker {
            public final String name;
            public final long thread;
            public final long time;

            public Marker(String name, long thread, long time) {
                this.name = name;
                this.thread = thread;
                this.time = time;
            }
        }

        private final List<Marker> mMarkers = new ArrayList<Marker>();
        private boolean mFinished = false;

        /** Adds a marker to this log with the specified name. */
        public synchronized void add(String name, long threadId) {
            if (mFinished) {
                throw new IllegalStateException("Marker added to finished log");
            }

            mMarkers.add(new Marker(name, threadId, SystemClock.elapsedRealtime()));
        }

        /**
         * Closes the log, dumping it to logcat if the time difference between
         * the first and last markers is greater than {@link #MIN_DURATION_FOR_LOGGING_MS}.
         * @param header Header string to print above the marker log.
         */
        public synchronized void finish(String header) {
            mFinished = true;

            long duration = getTotalDuration();
            if (duration <= MIN_DURATION_FOR_LOGGING_MS) {
                return;
            }

            long prevTime = mMarkers.get(0).time;
            d("(%-4d ms) %s", duration, header);
            for (Marker marker : mMarkers) {
                long thisTime = marker.time;
                d("(+%-4d) [%2d] %s", (thisTime - prevTime), marker.thread, marker.name);
                prevTime = thisTime;
            }
        }

        @Override
        protected void finalize() throws Throwable {
            // Catch requests that have been collected (and hence end-of-lifed)
            // but had no debugging output printed for them.
            if (!mFinished) {
                finish("Request on the loose");
                e("Marker log finalized without finish() - uncaught exit point for request");
            }
        }

        /** Returns the time difference between the first and last events in this log. */
        private long getTotalDuration() {
            if (mMarkers.size() == 0) {
                return 0;
            }

            long first = mMarkers.get(0).time;
            long last = mMarkers.get(mMarkers.size() - 1).time;
            return last - first;
        }
    }
}

- DIGITAL JEDI