Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
package com.example;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
/**
* Copyright 2015 Christopher Perry
*
* 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.
*/
public class Logger {
private static final String LOG_TAG = "Your-tag-here";
private static final String FORMAT_LOG_MESSAGE = "[%s]: %s";
private static final List<Tree> FOREST = new ArrayList<Tree>();
public static void plant(Tree tree) {
FOREST.add(tree);
}
public static void clearForest() {
FOREST.clear();
}
public interface Tree {
void verbose(String tag, String message);
void info(String tag, String message);
void debug(String tag, String message);
void warn(String tag, String message);
void error(String tag, String message);
void stackTrace(String tag, String message);
}
public static class AndroidTree implements Tree {
@Override
public void verbose(String tag, String message) {
Log.v(logtagWithThreadId(), String.format(FORMAT_LOG_MESSAGE, tag, message));
}
@Override
public void info(String tag, String message) {
Log.i(logtagWithThreadId(), String.format(FORMAT_LOG_MESSAGE, tag, message));
}
@Override
public void debug(String tag, String message) {
Log.d(logtagWithThreadId(), String.format(FORMAT_LOG_MESSAGE, tag, message));
}
@Override
public void warn(String tag, String message) {
Log.w(logtagWithThreadId(), String.format(FORMAT_LOG_MESSAGE, tag, message));
}
@Override
public void error(String tag, String message) {
Log.e(logtagWithThreadId(), String.format(FORMAT_LOG_MESSAGE, tag, message));
}
@Override
public void stackTrace(String tag, String message) {
Log.e(logtagWithThreadId(), String.format(FORMAT_LOG_MESSAGE, tag, message));
}
}
public static class AndroidErrorTree extends HollowTree {
@Override
public void error(String tag, String message) {
Log.e(logtagWithThreadId(), String.format(FORMAT_LOG_MESSAGE, tag, message));
}
}
////////////////////////////////////////////////////////
// Auto tagged
////////////////////////////////////////////////////////
public static void verbose(String message, Object... args) {
String tag = createTag();
message = formatString(message, args);
for (Tree tree : FOREST) {
tree.verbose(tag, message);
}
}
public static void debug(String message, Object... args) {
String tag = createTag();
message = formatString(message, args);
for (Tree tree : FOREST) {
tree.debug(tag, message);
}
}
public static void info(String message, Object... args) {
String tag = createTag();
message = formatString(message, args);
for (Tree tree : FOREST) {
tree.info(tag, message);
}
}
public static void warn(String message, Object... args) {
String tag = createTag();
message = formatString(message, args);
for (Tree tree : FOREST) {
tree.warn(tag, message);
}
}
public static void error(String message, Object... args) {
String tag = createTag();
message = formatString(message, args);
for (Tree tree : FOREST) {
tree.error(tag, message);
}
}
public static void stackTrace() {
String tag = createTag();
String message = getStackTrace();
for (Tree tree : FOREST) {
tree.stackTrace(tag, message);
}
}
static String getStackTrace() {
StringBuilder sb = new StringBuilder();
StackTraceElement[] stackTrace = new Throwable().getStackTrace();
for (StackTraceElement element : stackTrace) {
sb.append(element.toString()).append("\n");
}
return sb.toString();
}
static String formatString(String message, Object... args) {
return args.length == 0 ? message : String.format(message, args);
}
private static String createTag() {
String className = new Throwable().getStackTrace()[2].getClassName();
return className.substring(className.lastIndexOf('.') + 1);
}
private static String logtagWithThreadId() {
return LOG_TAG + " {" + Thread.currentThread().getId() + "}";
}
// Useful for extending
static class HollowTree implements Tree {
@Override
public void verbose(String tag, String message) { }
@Override
public void info(String tag, String message) { }
@Override
public void debug(String tag, String message) { }
@Override
public void warn(String tag, String message) { }
@Override
public void error(String tag, String message) { }
@Override
public void stackTrace(String tag, String message) { }
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.