Java tutorial
/* * Copyright (C) 2016 android@19code.com * * 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 com.code19.library; import android.text.TextUtils; import android.util.Log; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.io.StringReader; import java.io.StringWriter; import javax.xml.transform.OutputKeys; import javax.xml.transform.Source; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerFactory; import javax.xml.transform.stream.StreamResult; import javax.xml.transform.stream.StreamSource; /** * Created by Gh0st on 2016/6/7 007. * https://github.com/ZhaoKaiQiang/KLog */ public class L { public static String TAG = "ghost"; public static boolean LOG_DEBUG = true; private static final String LINE_SEPARATOR = System.getProperty("line.separator"); private static final int VERBOSE = 2; private static final int DEBUG = 3; private static final int INFO = 4; private static final int WARN = 5; private static final int ERROR = 6; private static final int ASSERT = 7; private static final int JSON = 8; private static final int XML = 9; private static final int JSON_INDENT = 4; public static void init(boolean isDebug, String tag) { TAG = tag; LOG_DEBUG = isDebug; } public static void v(String msg) { log(VERBOSE, null, msg); } public static void v(String tag, String msg) { log(VERBOSE, tag, msg); } public static void d(String msg) { log(DEBUG, null, msg); } public static void d(String tag, String msg) { log(DEBUG, tag, msg); } public static void i(Object... msg) { StringBuilder sb = new StringBuilder(); for (Object obj : msg) { sb.append(obj + ","); } log(INFO, null, String.valueOf(sb)); } public static void w(String msg) { log(WARN, null, msg); } public static void w(String tag, String msg) { log(WARN, tag, msg); } public static void e(String msg) { log(ERROR, null, msg); } public static void e(String tag, String msg) { log(ERROR, tag, msg); } public static void a(String msg) { log(ASSERT, null, msg); } public static void a(String tag, String msg) { log(ASSERT, tag, msg); } public static void json(String json) { log(JSON, null, json); } public static void json(String tag, String json) { log(JSON, tag, json); } public static void xml(String xml) { log(XML, null, xml); } public static void xml(String tag, String xml) { log(XML, tag, xml); } private static void log(int logType, String tagStr, Object objects) { String[] contents = wrapperContent(tagStr, objects); String tag = contents[0]; String msg = contents[1]; String headString = contents[2]; if (LOG_DEBUG) { switch (logType) { case VERBOSE: case DEBUG: case INFO: case WARN: case ERROR: case ASSERT: printDefault(logType, tag, headString + msg); break; case JSON: printJson(tag, msg, headString); break; case XML: printXml(tag, msg, headString); break; default: break; } } } private static void printDefault(int type, String tag, String msg) { if (TextUtils.isEmpty(tag)) { tag = TAG; } int index = 0; int maxLength = 4000; int countOfSub = msg.length() / maxLength; if (countOfSub > 0) { // The log is so long for (int i = 0; i < countOfSub; i++) { String sub = msg.substring(index, index + maxLength); printSub(type, tag, sub); index += maxLength; } //printSub(type, msg.substring(index, msg.length())); } else { printSub(type, tag, msg); } } private static void printSub(int type, String tag, String sub) { if (tag == null) { tag = TAG; } switch (type) { case VERBOSE: Log.v(tag, sub); break; case DEBUG: Log.d(tag, sub); break; case INFO: Log.i(tag, sub); break; case WARN: Log.w(tag, sub); break; case ERROR: Log.e(tag, sub); break; case ASSERT: Log.wtf(tag, sub); break; } } private static void printJson(String tag, String json, String headString) { if (TextUtils.isEmpty(json)) { d("Empty/Null json content"); return; } if (TextUtils.isEmpty(tag)) { tag = TAG; } String message; try { if (json.startsWith("{")) { JSONObject jsonObject = new JSONObject(json); message = jsonObject.toString(JSON_INDENT); } else if (json.startsWith("[")) { JSONArray jsonArray = new JSONArray(json); message = jsonArray.toString(JSON_INDENT); } else { message = json; } } catch (JSONException e) { message = json; } printLine(tag, true); message = headString + LINE_SEPARATOR + message; String[] lines = message.split(LINE_SEPARATOR); for (String line : lines) { Log.d(tag, "|" + line); } printLine(tag, false); } private static void printXml(String tag, String xml, String headString) { if (TextUtils.isEmpty(tag)) { tag = TAG; } if (xml != null) { try { Source xmlInput = new StreamSource(new StringReader(xml)); StreamResult xmlOutput = new StreamResult(new StringWriter()); Transformer transformer = TransformerFactory.newInstance().newTransformer(); transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2"); transformer.transform(xmlInput, xmlOutput); xml = xmlOutput.getWriter().toString().replaceFirst(">", ">\n"); } catch (Exception e) { e.printStackTrace(); } xml = headString + "\n" + xml; } else { xml = headString + "Log with null object"; } printLine(tag, true); String[] lines = xml.split(LINE_SEPARATOR); for (String line : lines) { if (!TextUtils.isEmpty(line)) { Log.d(tag, "|" + line); } } printLine(tag, false); } private static String[] wrapperContent(String tag, Object... objects) { if (TextUtils.isEmpty(tag)) { tag = TAG; } StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace(); StackTraceElement targetElement = stackTrace[5]; String className = targetElement.getClassName(); String[] classNameInfo = className.split("\\."); if (classNameInfo.length > 0) { className = classNameInfo[classNameInfo.length - 1] + ".java"; } String methodName = targetElement.getMethodName(); int lineNumber = targetElement.getLineNumber(); if (lineNumber < 0) { lineNumber = 0; } String methodNameShort = methodName.substring(0, 1).toUpperCase() + methodName.substring(1); String msg = (objects == null) ? "Log with null object" : getObjectsString(objects); String headString = "[(" + className + ":" + lineNumber + ")#" + methodNameShort + " ] "; return new String[] { tag, msg, headString }; } private static String getObjectsString(Object... objects) { if (objects.length > 1) { StringBuilder stringBuilder = new StringBuilder(); stringBuilder.append("\n"); for (int i = 0; i < objects.length; i++) { Object object = objects[i]; if (object == null) { stringBuilder.append("param").append("[").append(i).append("]").append(" = ").append("null") .append("\n"); } else { stringBuilder.append("param").append("[").append(i).append("]").append(" = ") .append(object.toString()).append("\n"); } } return stringBuilder.toString(); } else { Object object = objects[0]; return object == null ? "null" : object.toString(); } } public static void printLine(String tag, boolean isTop) { if (isTop) { Log.d(tag, "???????????????????????????????????????????????????????????????????????????????????????"); } else { Log.d(tag, "???????????????????????????????????????????????????????????????????????????????????????"); } } }