LogUtils
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package com.blankj.utilcode.util;import android.os.Environment;import android.support.annotation.IntDef;import android.util.Log;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.io.BufferedWriter;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.io.StringReader;import java.io.StringWriter;import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Formatter;import java.util.Locale;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;/** * <pre> * author: Blankj * blog : http://blankj.com * time : 2016/9/21 * desc : 日志相关工具类 * </pre> */public final class LogUtils { private LogUtils() { throw new UnsupportedOperationException("u can't instantiate me..."); } public static final int V = 0x01; public static final int D = 0x02; public static final int I = 0x04; public static final int W = 0x08; public static final int E = 0x10; public static final int A = 0x20; @IntDef({V, D, I, W, E, A}) @Retention(RetentionPolicy.SOURCE) public @interface TYPE { } private static final int FILE = 0xF1; private static final int JSON = 0xF2; private static final int XML = 0xF4; private static String dir; // log存储目录 private static boolean sLogSwitch = true; // log总开关 private static String sGlobalTag = null; // log标签 private static boolean sTagIsSpace = true; // log标签是否为空白 private static boolean sLog2FileSwitch = false;// log写入文件开关 private static boolean sLogBorderSwitch = true; // log边框开关 private static int sLogFilter = V; // log过滤器 private static final String TOP_BORDER = "╔═══════════════════════════════════════════════════════════════════════════════════════════════════"; private static final String LEFT_BORDER = "║ "; private static final String BOTTOM_BORDER = "╚═══════════════════════════════════════════════════════════════════════════════════════════════════"; private static final String LINE_SEPARATOR = System.getProperty("line.separator"); private static final int MAX_LEN = 4000; private static final String NULL_TIPS = "Log with null object."; private static final String NULL = "null"; private static final String ARGS = "args"; public static class Builder { public Builder() { if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) { dir = Utils.getContext().getExternalCacheDir() + File.separator + "log" + File.separator; } else { dir = Utils.getContext().getCacheDir() + File.separator + "log" + File.separator; } } public Builder setGlobalTag(String tag) { if (!isSpace(tag)) { LogUtils.sGlobalTag = tag; sTagIsSpace = false; } else { LogUtils.sGlobalTag = ""; sTagIsSpace = true; } return this; } public Builder setLogSwitch(boolean logSwitch) { LogUtils.sLogSwitch = logSwitch; return this; } public Builder setLog2FileSwitch(boolean log2FileSwitch) { LogUtils.sLog2FileSwitch = log2FileSwitch; return this; } public Builder setBorderSwitch(boolean borderSwitch) { LogUtils.sLogBorderSwitch = borderSwitch; return this; } public Builder setLogFilter(@TYPE int logFilter) { LogUtils.sLogFilter = logFilter; return this; } } public static void v(Object contents) { log(V, sGlobalTag, contents); } public static void v(String tag, Object... contents) { log(V, tag, contents); } public static void d(Object contents) { log(D, sGlobalTag, contents); } public static void d(String tag, Object... contents) { log(D, tag, contents); } public static void i(Object contents) { log(I, sGlobalTag, contents); } public static void i(String tag, Object... contents) { log(I, tag, contents); } public static void w(Object contents) { log(W, sGlobalTag, contents); } public static void w(String tag, Object... contents) { log(W, tag, contents); } public static void e(Object contents) { log(E, sGlobalTag, contents); } public static void e(String tag, Object... contents) { log(E, tag, contents); } public static void a(Object contents) { log(A, sGlobalTag, contents); } public static void a(String tag, Object... contents) { log(A, tag, contents); } public static void file(Object contents) { log(FILE, sGlobalTag, contents); } public static void file(String tag, Object contents) { log(FILE, tag, contents); } public static void json(String contents) { log(JSON, sGlobalTag, contents); } public static void json(String tag, String contents) { log(JSON, tag, contents); } public static void xml(String contents) { log(XML, sGlobalTag, contents); } public static void xml(String tag, String contents) { log(XML, tag, contents); } private static void log(int type, String tag, Object... contents) { if (!sLogSwitch) return; final String[] processContents = processContents(type, tag, contents); tag = processContents[0]; String msg = processContents[1]; switch (type) { case V: case D: case I: case W: case E: case A: if (V == sLogFilter || type >= sLogFilter) { printLog(type, tag, msg); } if (sLog2FileSwitch) { print2File(tag, msg); } break; case FILE: print2File(tag, msg); break; case JSON: printLog(D, tag, msg); break; case XML: printLog(D, tag, msg); break; } } private static String[] processContents(int type, String tag, Object... contents) { StackTraceElement targetElement = Thread.currentThread().getStackTrace()[5]; String className = targetElement.getClassName(); String[] classNameInfo = className.split("\\."); if (classNameInfo.length > 0) { className = classNameInfo[classNameInfo.length - 1]; } if (className.contains("$")) { className = className.split("\\$")[0]; } if (!sTagIsSpace) {// 如果全局tag不为空，那就用全局tag tag = sGlobalTag; } else {// 全局tag为空时，如果传入的tag为空那就显示类名，否则显示tag tag = isSpace(tag) ? className : tag; } String head = new Formatter() .format("Thread: %s, %s(%s.java:%d)" + LINE_SEPARATOR, Thread.currentThread().getName(), targetElement.getMethodName(), className, targetElement.getLineNumber()) .toString(); String msg = NULL_TIPS; if (contents != null) { if (contents.length == 1) { Object object = contents[0]; msg = object == null ? NULL : object.toString(); if (type == JSON) { msg = formatJson(msg); } else if (type == XML) { msg = formatXml(msg); } } else { StringBuilder sb = new StringBuilder(); for (int i = 0, len = contents.length; i < len; ++i) { Object content = contents[i]; sb.append(ARGS) .append("[") .append(i) .append("]") .append(" = ") .append(content == null ? NULL : content.toString()) .append(LINE_SEPARATOR); } msg = sb.toString(); } } if (sLogBorderSwitch) { StringBuilder sb = new StringBuilder(); String[] lines = msg.split(LINE_SEPARATOR); for (String line : lines) { sb.append(LEFT_BORDER).append(line).append(LINE_SEPARATOR); } msg = sb.toString(); } return new String[]{tag, head + msg}; } private static String formatJson(String json) { try { if (json.startsWith("{")) { json = new JSONObject(json).toString(4); } else if (json.startsWith("[")) { json = new JSONArray(json).toString(4); } } catch (JSONException e) { e.printStackTrace(); } return json; } private static String formatXml(String xml) { 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", "4"); transformer.transform(xmlInput, xmlOutput); xml = xmlOutput.getWriter().toString().replaceFirst(">", ">" + LINE_SEPARATOR); } catch (Exception e) { e.printStackTrace(); } return xml; } private static void printLog(int type, String tag, String msg) { if (sLogBorderSwitch) printBorder(type, tag, true); int len = msg.length(); int countOfSub = len / MAX_LEN; if (countOfSub > 0) { int index = 0; String sub; for (int i = 0; i < countOfSub; i++) { sub = msg.substring(index, index + MAX_LEN); printSubLog(type, tag, sub); index += MAX_LEN; } printSubLog(type, tag, msg.substring(index, len)); } else { printSubLog(type, tag, msg); } if (sLogBorderSwitch) printBorder(type, tag, false); } private static void printSubLog(final int type, final String tag, String msg) { if (sLogBorderSwitch) msg = LEFT_BORDER + msg; switch (type) { case V: Log.v(tag, msg); break; case D: Log.d(tag, msg); break; case I: Log.i(tag, msg); break; case W: Log.w(tag, msg); break; case E: Log.e(tag, msg); break; case A: Log.wtf(tag, msg); break; } } private static void printBorder(int type, String tag, boolean isTop) { String border = isTop ? TOP_BORDER : BOTTOM_BORDER; switch (type) { case V: Log.v(tag, border); break; case D: Log.d(tag, border); break; case I: Log.i(tag, border); break; case W: Log.w(tag, border); break; case E: Log.e(tag, border); break; case A: Log.wtf(tag, border); break; } } private synchronized static void print2File(final String tag, final String msg) { Date now = new Date(); String date = new SimpleDateFormat("MM-dd", Locale.getDefault()).format(now); final String fullPath = dir + date + ".txt"; if (!createOrExistsFile(fullPath)) { Log.e(tag, "log to " + fullPath + " failed!"); return; } String time = new SimpleDateFormat("MM-dd HH:mm:ss.SSS ", Locale.getDefault()).format(now); StringBuilder sb = new StringBuilder(); if (sLogBorderSwitch) sb.append(TOP_BORDER).append(LINE_SEPARATOR); sb.append(time) .append(tag) .append(": ") .append(msg) .append(LINE_SEPARATOR); if (sLogBorderSwitch) sb.append(BOTTOM_BORDER).append(LINE_SEPARATOR); final String dateLogContent = sb.toString(); new Thread(new Runnable() { @Override public void run() { BufferedWriter bw = null; try { bw = new BufferedWriter(new FileWriter(fullPath, true)); bw.write(dateLogContent); Log.d(tag, "log to " + fullPath + " success!"); } catch (IOException e) { e.printStackTrace(); Log.e(tag, "log to " + fullPath + " failed!"); } finally { try { if (bw != null) { bw.close(); } } catch (IOException e) { e.printStackTrace(); } } } }).start(); } private static boolean createOrExistsFile(String filePath) { return createOrExistsFile(isSpace(filePath) ? null : new File(filePath)); } private static boolean createOrExistsFile(File file) { if (file == null) return false; if (file.exists()) return file.isFile(); if (!createOrExistsDir(file.getParentFile())) return false; try { return file.createNewFile(); } catch (IOException e) { e.printStackTrace(); return false; } } private static boolean createOrExistsDir(File file) { return file != null && (file.exists() ? file.isDirectory() : file.mkdirs()); } private static boolean isSpace(String s) { if (s == null) return true; for (int i = 0, len = s.length(); i < len; ++i) { if (!Character.isWhitespace(s.charAt(i))) { return false; } } return true; }}阅读全文
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