记一个可以打开，关闭的log日志
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记录一个可以打开（输出），关闭（不输出）的log日志
public class MyLog { public static Boolean DEBUG = MyApplacation.DEBUG;//true或者false来表示 private static final String TAG = "zhaojian"; public static void init(Context context) { new ALog.Builder(context) .setLogSwitch(DEBUG)// 设置log总开关，默认开 .setGlobalTag("Zhaojian")// 设置log全局标签，默认为空 // 当全局标签不为空时，我们输出的log全部为该tag， // 为空时，如果传入的tag为空那就显示类名，否则显示tag .setDir(GlobalFilePath.CACHE_LOG) .setLogHeadSwitch(false)// 设置log头部是否显示，默认显示 .setLog2FileSwitch(false)// 打印log时是否存到文件的开关，默认关 .setBorderSwitch(false)// 输出日志是否带边框开关，默认开 .setLogFilter(ALog.V);// log过滤器，和logcat过滤器同理，默认Verbose } public static void d(String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.d(TAG, s); } else { if (DEBUG) ALog.d(TAG, "The information can't be null"); } } public static void d(String MyTAG, String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.d(MyTAG, s); } else { if (DEBUG) ALog.d(MyTAG, "The information can't be null"); } } public static void v(String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.v(TAG, s); } else { if (DEBUG) ALog.v(TAG, "The information can't be null"); } } public static void v(String MyTAG, String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.v(MyTAG, s); } else { if (DEBUG) ALog.v(MyTAG, "The information can't be null"); } } public static void e(String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.e(TAG, s); } else { if (DEBUG) ALog.e(TAG, "The information can't be null"); } } public static void e(String MyTAG, String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.e(MyTAG, s); } else { if (DEBUG) ALog.e(MyTAG, "The information can't be null"); } } public static void json(String MyTAG, String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.json(MyTAG, s); } else { if (DEBUG) ALog.json(MyTAG, "The information can't be null"); } } public static void json(String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.json(s); } else { if (DEBUG) ALog.json("The information can't be null"); } } public static void xml(String MyTAG, String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.xml(MyTAG, s); } else { if (DEBUG) ALog.xml(MyTAG, "The information can't be null"); } } public static void xml(String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.xml(s); } else { if (DEBUG) ALog.xml("The information can't be null"); } } public static void file(String MyTAG, String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.file(MyTAG, s); } else { if (DEBUG) ALog.e(MyTAG, "The information can't be null"); } } public static void file(String s) { if (!TextUtils.isEmpty(s)) { if (DEBUG) ALog.file(s); } else { if (DEBUG) ALog.e("The information can't be null"); } }}
上面代码中提到的一个是在Applicaiotn中掌握关闭或开关，一个是Alog可以打印返回的数据特别长时，控制台展示不全的解决方法和直接可打印json数据
public static boolean DEBUG = true;上面这句代码放在applicaiton入口处，当debug为true时，代表在控制台可以输出日志，为false时是不可以输出日志的
public final class ALog { 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) private @interface TYPE { } private static final int FILE = 0xF1; private static final int JSON = 0xF2; private static final int XML = 0xF4; private static ExecutorService executor; private static String defaultDir;// log默认存储目录 private static String dir; // log存储目录 private static boolean sLogSwitch = true; // log总开关，默认开 private static String sGlobalTag = null; // log标签 private static boolean sTagIsSpace = true; // log标签是否为空白 private static boolean sLogHeadSwitch = true; // log头部开关，默认开 private static boolean sLog2FileSwitch = false;// log写入文件开关，默认关 private static boolean sLogBorderSwitch = true; // log边框开关，默认开 private static int sLogFilter = V; // log过滤器 private static final String FILE_SEP = System.getProperty("file.separator"); private static final String LINE_SEP = System.getProperty("line.separator"); private static final String TOP_BORDER = "╔═══════════════════════════════════════════════════════════════════════════════════════════════════"; private static final String LEFT_BORDER = "║ "; private static final String BOTTOM_BORDER = "╚═══════════════════════════════════════════════════════════════════════════════════════════════════"; private static final int MAX_LEN = 4000; private static final Format FORMAT = new SimpleDateFormat("MM-dd HH:mm:ss.SSS ", Locale.getDefault()); private static final String NULL_TIPS = "Log with null object."; private static final String NULL = "null"; private static final String ARGS = "args"; private ALog() { throw new UnsupportedOperationException("u can't instantiate me..."); } public static class Builder { public Builder(@NonNull Context context) { if (defaultDir != null) return; if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) && context.getExternalCacheDir() != null) defaultDir = context.getExternalCacheDir() + FILE_SEP + "log" + FILE_SEP; else { defaultDir = context.getCacheDir() + FILE_SEP + "log" + FILE_SEP; } } public Builder setLogSwitch(boolean logSwitch) { ALog.sLogSwitch = logSwitch; return this; } public Builder setGlobalTag(final String tag) { if (isSpace(tag)) { ALog.sGlobalTag = ""; sTagIsSpace = true; } else { ALog.sGlobalTag = tag; sTagIsSpace = false; } return this; } public Builder setLogHeadSwitch(boolean logHeadSwitch) { ALog.sLogHeadSwitch = logHeadSwitch; return this; } public Builder setLog2FileSwitch(boolean log2FileSwitch) { ALog.sLog2FileSwitch = log2FileSwitch; return this; } public Builder setDir(final String dir) { if (isSpace(dir)) { ALog.dir = null; } else { ALog.dir = dir.endsWith(FILE_SEP) ? dir : dir + FILE_SEP; } return this; } public Builder setDir(final File dir) { ALog.dir = dir == null ? null : dir.getAbsolutePath() + FILE_SEP; return this; } public Builder setBorderSwitch(boolean borderSwitch) { ALog.sLogBorderSwitch = borderSwitch; return this; } public Builder setLogFilter(@TYPE int logFilter) { ALog.sLogFilter = logFilter; return this; } @Override public String toString() { return "switch: " + sLogSwitch + LINE_SEP + "tag: " + (sGlobalTag.equals("") ? "null" : sGlobalTag) + LINE_SEP + "head: " + sLogHeadSwitch + LINE_SEP + "file: " + sLog2FileSwitch + LINE_SEP + "dir: " + (dir == null ? defaultDir : dir) + LINE_SEP + "border: " + sLogBorderSwitch + LINE_SEP + "filter: " + (sLogFilter == V ? "verbose" : "not verbose"); } } 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 (type >= sLogFilter) { printLog(type, tag, msg); if (sLog2FileSwitch) { print2File(tag, msg); } } break; case FILE: print2File(tag, msg); break; case JSON: printLog(E, tag, msg); break; case XML: printLog(E, tag, msg); break; } } private static String[] processContents(int type, String tag, Object... contents) { String head = ""; if (!sTagIsSpace && !sLogHeadSwitch) { tag = sGlobalTag; }else { 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) { tag = isSpace(tag) ? className : tag; } if (sLogHeadSwitch) { head = new Formatter() .format("Thread: %s, %s(%s.java:%d)" + LINE_SEP, Thread.currentThread().getName(), targetElement.getMethodName(), className, targetElement.getLineNumber()) .toString(); } } String body = NULL_TIPS; if (contents != null) { if (contents.length == 1) { Object object = contents[0]; body = object == null ? NULL : object.toString(); if (type == JSON) { body = formatJson(body); } else if (type == XML) { body = formatXml(body); } } 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_SEP); } body = sb.toString(); } } String msg = head + body; if (sLogBorderSwitch) { StringBuilder sb = new StringBuilder(); String[] lines = msg.split(LINE_SEP); for (String line : lines) { sb.append(LEFT_BORDER).append(line).append(LINE_SEP); } msg = sb.toString(); } return new String[]{tag, 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_SEP); } catch (Exception e) { e.printStackTrace(); } return xml; } private static void printLog(int type, String tag, String msg) { if (sLogBorderSwitch) print(type, tag, TOP_BORDER); int len = msg.length(); int countOfSub = len / MAX_LEN; if (countOfSub > 0) { print(type, tag, msg.substring(0, MAX_LEN)); String sub; int index = MAX_LEN; for (int i = 1; i < countOfSub; i++) { sub = msg.substring(index, index + MAX_LEN); print(type, tag, sLogBorderSwitch ? LEFT_BORDER + sub : sub); index += MAX_LEN; } sub = msg.substring(index, len); print(type, tag, sLogBorderSwitch ? LEFT_BORDER + sub : sub); } else { print(type, tag, msg); } if (sLogBorderSwitch) print(type, tag, BOTTOM_BORDER); } private static void print(final int type, final String tag, String 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 print2File(final String tag, final String msg) { Date now = new Date(System.currentTimeMillis()); String format = FORMAT.format(now); String date = format.substring(0, 5); String time = format.substring(6); final String fullPath = (dir == null ? defaultDir : dir) + date + ".txt"; if (!createOrExistsFile(fullPath)) { Log.e(tag, "log to " + fullPath + " failed!"); return; } StringBuilder sb = new StringBuilder(); if (sLogBorderSwitch) { sb.append(TOP_BORDER).append(LINE_SEP); sb.append(LEFT_BORDER) .append(time) .append(tag) .append(LINE_SEP) .append(msg); sb.append(BOTTOM_BORDER).append(LINE_SEP); } else { sb.append(time) .append(tag) .append(LINE_SEP) .append(msg) .append(LINE_SEP); } sb.append(LINE_SEP); final String dateLogContent = sb.toString(); if (executor == null) { executor = Executors.newSingleThreadExecutor(); } executor.execute(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(); } } } }); } private static boolean createOrExistsFile(String filePath) { File file = new File(filePath); 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; }}
以上步骤就完成了一个可以随时关闭或打开的log日志了
调用时和log的调用方法一样
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