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Christian Bauer
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Nov 6, 2014
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145 changes: 145 additions & 0 deletions
145
core/src/main/java/org/fourthline/cling/android/FixedAndroidLogHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| /* | ||
| * Copyright (C) 2008 The Android Open Source Project | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.fourthline.cling.android; | ||
|
|
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| import android.util.Log; | ||
|
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| import java.io.PrintWriter; | ||
| import java.io.StringWriter; | ||
| import java.util.logging.Formatter; | ||
| import java.util.logging.Handler; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.LogRecord; | ||
|
|
||
| /* | ||
| Taken from: http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob_plain;f=core/java/com/android/internal/logging/AndroidHandler.java;hb=c2ad241504fcaa12d4579d3b0b4038d1ca8d08c9 | ||
| */ | ||
| public class FixedAndroidLogHandler extends Handler { | ||
| /** | ||
| * Holds the formatter for all Android log handlers. | ||
| */ | ||
| private static final Formatter THE_FORMATTER = new Formatter() { | ||
| @Override | ||
| public String format(LogRecord r) { | ||
| Throwable thrown = r.getThrown(); | ||
| if (thrown != null) { | ||
| StringWriter sw = new StringWriter(); | ||
| PrintWriter pw = new PrintWriter(sw); | ||
| sw.write(r.getMessage()); | ||
| sw.write("\n"); | ||
| thrown.printStackTrace(pw); | ||
| pw.flush(); | ||
| return sw.toString(); | ||
| } else { | ||
| return r.getMessage(); | ||
| } | ||
| } | ||
| }; | ||
|
|
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| /** | ||
| * Constructs a new instance of the Android log handler. | ||
| */ | ||
| public FixedAndroidLogHandler() { | ||
| setFormatter(THE_FORMATTER); | ||
| } | ||
|
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||
| @Override | ||
| public void close() { | ||
| // No need to close, but must implement abstract method. | ||
| } | ||
|
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| @Override | ||
| public void flush() { | ||
| // No need to flush, but must implement abstract method. | ||
| } | ||
|
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| @Override | ||
| public void publish(LogRecord record) { | ||
| try { | ||
| int level = getAndroidLevel(record.getLevel()); | ||
| String tag = record.getLoggerName(); | ||
|
|
||
| if (tag == null) { | ||
| // Anonymous logger. | ||
| tag = "null"; | ||
| } else { | ||
| // Tags must be <= 23 characters. | ||
| int length = tag.length(); | ||
| if (length > 23) { | ||
| // Most loggers use the full class name. Try dropping the | ||
| // package. | ||
| int lastPeriod = tag.lastIndexOf("."); | ||
| if (length - lastPeriod - 1 <= 23) { | ||
| tag = tag.substring(lastPeriod + 1); | ||
| } else { | ||
| // Use last 23 chars. | ||
| tag = tag.substring(tag.length() - 23); | ||
| } | ||
| } | ||
| } | ||
|
|
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| /* ############################################################################################ | ||
| Instead of using the perfectly fine java.util.logging API for setting the | ||
| loggable levels, this call relies on a totally obscure "local.prop" file which you have to place on | ||
| your device. By default, if you do not have that file and if you do not execute some magic | ||
| "setprop" commands on your device, only INFO/WARN/ERROR is loggable. So whatever you do with | ||
| java.util.logging.Logger.setLevel(...) doesn't have any effect. The debug messages might arrive | ||
| here but they are dropped because you _also_ have to set the Android internal logging level with | ||
| the aforementioned magic switches. | ||
| Also, consider that you have to understand how a JUL logger name is mapped to the "tag" of | ||
| the Android log. Basically, the whole cutting and cropping procedure above is what you have to | ||
| memorize if you want to log with JUL and configure Android for debug output. | ||
| I actually admire the pure evil of this setup, even Mr. Ceki can learn something! | ||
| Commenting out these lines makes it all work as expected: | ||
| if (!Log.isLoggable(tag, level)) { | ||
| return; | ||
| } | ||
| ############################################################################################### */ | ||
|
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| String message = getFormatter().format(record); | ||
| Log.println(level, tag, message); | ||
| } catch (RuntimeException e) { | ||
| Log.e("AndroidHandler", "Error logging message.", e); | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * Converts a {@link java.util.logging.Logger} logging level into an Android one. | ||
| * | ||
| * @param level The {@link java.util.logging.Logger} logging level. | ||
| * | ||
| * @return The resulting Android logging level. | ||
| */ | ||
| static int getAndroidLevel(Level level) { | ||
| int value = level.intValue(); | ||
| if (value >= 1000) { // SEVERE | ||
| return Log.ERROR; | ||
| } else if (value >= 900) { // WARNING | ||
| return Log.WARN; | ||
| } else if (value >= 800) { // INFO | ||
| return Log.INFO; | ||
| } else { | ||
| return Log.DEBUG; | ||
| } | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
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@@ -21,7 +21,7 @@ | |
| <hr/> | ||
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| <h2> | ||
| Cling 2.0.1 | ||
| Cling 2.0.x | ||
| </h2> | ||
|
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| <ul> | ||
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