Android encapsulation encapsulates the native Log
- 2021-12-05 07:28:49
- OfStack
I won't talk too much, let's just look at the code ~
package com.zjx.taobaounion.utils;
import android.util.Log;
public class LogUtils {
private static int currentLev = 4; // Current log Rank Control this level after going online You can reduce Log Output of
private static final int DEBUG_LEV = 4; // debug Rank
private static final int INFO_LEV = 3; // info Rank
private static final int WARNING_LEV = 2; // warning Rank
private static final int ERROR_LEV = 1; // error Rank
public static void d(Class clazz,String log){
if (currentLev >= DEBUG_LEV) {
// If the currently set level Greater than or equal to debug Rank Then it proves that it is not masked at present debug Adj. log Output
Log.d(clazz.getSimpleName(),log);
}
}
public static void i(Class clazz,String log){
if (currentLev >= INFO_LEV) {
// If the currently set level Greater than or equal to info Then it proves that it is not masked at present info Adj. log Output
Log.i(clazz.getSimpleName(),log);
}
}
public static void w(Class clazz,String log){
if (currentLev >= WARNING_LEV) {
// If the currently set level Greater than or equal to warning Then it proves that it is not masked at present warning Adj. log Output
Log.w(clazz.getSimpleName(),log);
}
}
public static void e(Class clazz,String log){
if (currentLev >= ERROR_LEV) {
// If the currently set level Greater than or equal to error Then it proves that it is not masked at present error Adj. log Output
Log.e(clazz.getSimpleName(),log);
}
}
}
Additional knowledge: android log file LogUtils
Background
This is a long time ago in the network to find a common class, has forgotten the original link, but feel very good to use 1 straight in use, can log written to file inside can also locate you in which class which 1 line print log, save to the file path is android/data/your package name/files/directory, and then we can find problems happily
import android.text.TextUtils;
import android.util.Log;
import com.smartlink.suixing.App;
import com.smartlink.suixing.BuildConfig;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Formatter;
import java.util.Locale;
public class LogUtils {
public static String customTagPrefix = "log"; // Customize Tag The prefix of, which can be the author name
private static final boolean isSaveLog = true; // Do you want to save the log to SD Card
private static String cacheDirPath;
private LogUtils() {
}
// The type of log allowed to be printed, the default is true Is set to false Do not print
public static boolean allowD = BuildConfig.DEBUG;
public static boolean allowE = BuildConfig.DEBUG;
public static boolean allowI = BuildConfig.DEBUG;
public static boolean allowV = BuildConfig.DEBUG;
public static boolean allowW = BuildConfig.DEBUG;
public static boolean allowWtf = BuildConfig.DEBUG;
// public static boolean allowD = true;
// public static boolean allowE = true;
// public static boolean allowI = true;
// public static boolean allowV = true;
// public static boolean allowW = true;
// public static boolean allowWtf = true;
private static String generateTag(StackTraceElement caller) {
String tag = "%s.%s(Line:%d)"; // Placeholder
String callerClazzName = caller.getClassName(); // Get to the class name
callerClazzName = callerClazzName.substring(callerClazzName.lastIndexOf(".") + 1);
tag = String.format(tag, callerClazzName, caller.getMethodName(), caller.getLineNumber()); // Replace
tag = TextUtils.isEmpty(customTagPrefix) ? tag : customTagPrefix + ":" + tag;
return tag;
}
/***
* The print console can't display that long log problem
*
* @param msg
*/
public static void logE(String msg) { // The message is too long , Sectional printing
if (!allowE) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
// Because String Adj. length The number of characters is not the number of bytes, so in order to prevent too many Chinese characters,
// Put 4*1024 Adj. MAX Byte print length changed to 2001 Number of characters
int max_str_length = 2001 - tag.length();
// Greater than 4000 Hour
while (msg.length() > max_str_length) {
// Log.e(tag, msg.substring(0, max_str_length));
LogUtils.e(msg.substring(0, max_str_length));
msg = msg.substring(max_str_length);
}
// The remainder
// Log.e(tag, msg);
LogUtils.e(msg);
}
/**
* Custom logger
*/
public static CustomLogger customLogger;
public interface CustomLogger {
void d(String tag, String content);
void d(String tag, String content, Throwable tr);
void e(String tag, String content);
void e(String tag, String content, Throwable tr);
void i(String tag, String content);
void i(String tag, String content, Throwable tr);
void v(String tag, String content);
void v(String tag, String content, Throwable tr);
void w(String tag, String content);
void w(String tag, String content, Throwable tr);
void w(String tag, Throwable tr);
void wtf(String tag, String content);
void wtf(String tag, String content, Throwable tr);
void wtf(String tag, Throwable tr);
}
public static void d(String content) {
if (!allowD) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.d(tag, content);
} else {
Log.d(tag, content);
}
}
public static void d(String content, Throwable tr) {
if (!allowD) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.d(tag, content, tr);
} else {
Log.d(tag, content, tr);
}
}
public static void e(String content) {
if (!allowE) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.e(tag, content);
} else {
Log.e(tag, content);
}
if (isSaveLog) {
point(cacheDirPath, tag, content);
}
}
public static void e(String content, Throwable tr) {
if (!allowE) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.e(tag, content, tr);
} else {
Log.e(tag, content, tr);
}
if (isSaveLog) {
point(cacheDirPath, tag, tr.getMessage());
}
}
public static void e(Throwable tr) {
if (!allowE) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.e(tag, "", tr);
} else {
Log.e(tag, "", tr);
}
if (isSaveLog) {
point(cacheDirPath, tag, tr.getMessage());
}
}
public static void i(String content) {
if (!allowI) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.i(tag, content);
} else {
Log.i(tag, content);
}
}
public static void i(String content, Throwable tr) {
if (!allowI) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.i(tag, content, tr);
} else {
Log.i(tag, content, tr);
}
}
public static void v(String content) {
if (!allowV) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.v(tag, content);
} else {
Log.v(tag, content);
}
}
public static void v(String content, Throwable tr) {
if (!allowV) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.v(tag, content, tr);
} else {
Log.v(tag, content, tr);
}
}
public static void w(String content) {
if (!allowW) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.w(tag, content);
} else {
Log.w(tag, content);
}
}
public static void w(String content, Throwable tr) {
if (!allowW) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.w(tag, content, tr);
} else {
Log.w(tag, content, tr);
}
}
public static void w(Throwable tr) {
if (!allowW) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.w(tag, tr);
} else {
Log.w(tag, tr);
}
}
public static void wtf(String content) {
if (!allowWtf) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.wtf(tag, content);
} else {
Log.wtf(tag, content);
}
}
public static void wtf(String content, Throwable tr) {
if (!allowWtf) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.wtf(tag, content, tr);
} else {
Log.wtf(tag, content, tr);
}
}
public static void wtf(Throwable tr) {
if (!allowWtf) return;
StackTraceElement caller = getCallerStackTraceElement();
String tag = generateTag(caller);
if (customLogger != null) {
customLogger.wtf(tag, tr);
} else {
Log.wtf(tag, tr);
}
}
private static StackTraceElement getCallerStackTraceElement() {
return Thread.currentThread().getStackTrace()[4];
}
public static void point(String path, String tag, String msg) {
if (isSDAva()) {
path = cacheDirPath;
Date date = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("", Locale.SIMPLIFIED_CHINESE);
dateFormat.applyPattern("yyyy");
path = path + dateFormat.format(date) + "/";
dateFormat.applyPattern("MM");
path += dateFormat.format(date) + "/";
dateFormat.applyPattern("dd");
path += dateFormat.format(date) + ".log";
dateFormat.applyPattern("[yyyy-MM-dd HH:mm:ss]");
String time = dateFormat.format(date);
File file = new File(path);
if (!file.exists()) createDipPath(path);
BufferedWriter out = null;
try {
out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true)));
out.write(time + " " + tag + " " + msg + "\r\n");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (out != null) {
out.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* According to the file path Recursive file creation
*
* @param file
*/
public static void createDipPath(String file) {
String parentFile = file.substring(0, file.lastIndexOf("/"));
File file1 = new File(file);
File parent = new File(parentFile);
if (!file1.exists()) {
parent.mkdirs();
try {
file1.createNewFile();
LogUtils.e(" The path to the log file is " + file1.getAbsolutePath());
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* A little trick to reuse a formatter in the same thread
*/
private static class ReusableFormatter {
private Formatter formatter;
private StringBuilder builder;
public ReusableFormatter() {
builder = new StringBuilder();
formatter = new Formatter(builder);
}
public String format(String msg, Object... args) {
formatter.format(msg, args);
String s = builder.toString();
builder.setLength(0);
return s;
}
}
private static final ThreadLocal<ReusableFormatter> thread_local_formatter = new ThreadLocal<ReusableFormatter>() {
protected ReusableFormatter initialValue() {
return new ReusableFormatter();
}
};
public static String format(String msg, Object... args) {
ReusableFormatter formatter = thread_local_formatter.get();
return formatter.format(msg, args);
}
public static boolean isSDAva() {
if (cacheDirPath == null) cacheDirPath = App.getAppContext().getExternalFilesDir("log").getAbsolutePath();
if (!TextUtils.isEmpty(cacheDirPath)) {
return true;
} else {
return false;
}
}
}